![Cutaway of a MAN V8 Diesel engine](https://upload.wikimedia.org/wikipedia/commons/3/38/Cutaway_of_a_MAN_V8_Diesel_engine.jpg)
Common rail direct fuel injection is a direct
fuel injection
Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines.
All comp ...
system built around a high-
pressure
Pressure (symbol: ''p'' or ''P'') is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled ''gage'' pressure)The preferred spelling varies by country and e ...
(over ) fuel rail feeding
solenoid valve
A solenoid valve is an electromechanically operated valve.
Solenoid valves differ in the characteristics of the electric current they use, the strength of the magnetic field they generate, the mechanism they use to regulate the fluid, and the ty ...
s, as opposed to a low-pressure
fuel pump
A fuel pump is a component in motor vehicles that transfers liquid from the fuel tank to the carburetor or fuel injector of the internal combustion engine.
Carbureted engines often use low pressure mechanical pumps that are mounted outside the f ...
feeding
unit injectors (or pump nozzles). High-pressure injection delivers power and fuel consumption benefits over earlier lower pressure fuel injection, by injecting fuel as a larger number of smaller droplets, giving a much higher ratio of surface area to volume. This provides improved vaporization from the surface of the fuel droplets, and so more efficient combining of atmospheric oxygen with vaporized fuel delivering more complete combustion.
Common rail injection is widely used in
diesel engine
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-call ...
s. It is also the basis of
gasoline direct injection
Gasoline direct injection (GDI), also known as petrol direct injection (PDI), is a mixture formation system for internal combustion engines that run on gasoline (petrol), where fuel is injected into the combustion chamber. This is distinct fro ...
systems used on
petrol engine
A petrol engine (gasoline engine in American English) is an internal combustion engine designed to run on petrol (gasoline). Petrol engines can often be adapted to also run on fuels such as liquefied petroleum gas and ethanol blends (such as ''E ...
s.
History
Vickers
Vickers was a British engineering company that existed from 1828 until 1999. It was formed in Sheffield as a steel foundry by Edward Vickers and his father-in-law, and soon became famous for casting church bells. The company went public in 18 ...
pioneered the use of common rail injection in submarine engines. Vickers engines with the common rail fuel system were first used in 1916 in the
G-class submarines. It used four plunger pumps to deliver a pressure up to every 90° of rotation to keep the fuel pressure adequately constant in the rail. Fuel delivery to individual cylinders could be shut off by valves in the injector lines.
Doxford Engines used a common rail system in their
opposed-piston marine engines from 1921 to 1980, where a multicylinder reciprocating fuel pump generated a pressure around , with the fuel being stored in accumulator bottles. Pressure control was achieved by an adjustable pump discharge stroke and a "spill valve". Camshaft-operated mechanical timing valves were used to supply the spring-loaded Brice/CAV/Lucas injectors, which injected through the side of the cylinder into the chamber formed between the pistons. Early engines had a pair of timing cams, one for ahead running and one for astern. Later engines had two injectors per cylinder, and the final series of constant-pressure turbocharged engines was fitted with four injectors per cylinder. This system was used for the injection of both diesel and heavy fuel oil (600cSt heated to a temperature near 130 °C).
Common rail engines have been used in marine and
locomotive
A locomotive or engine is a rail transport vehicle that provides the Power (physics), motive power for a train. If a locomotive is capable of carrying a payload, it is usually rather referred to as a multiple unit, Motor coach (rail), motor ...
applications for some time. The
Cooper-Bessemer
Cooper-Bessemer refers to the Cooper-Bessemer Corporation and the Cooper-Bessemer brand of industrial engines and compressors, manufactured in Mount Vernon, Ohio. The Cooper-Bessemer Corporation was formed when C. & G. Cooper (founded in 1833) an ...
GN-8 (''circa'' 1942) is an example of a hydraulically operated common rail diesel engine, also known as a modified common rail.
The common rail system prototype for automotive engines was developed in the late 1960s by
Robert Huber
Robert Huber (; born 20 February 1937) is a German biochemist and Nobel laureate. known for his work crystallizing an intramembrane protein important in photosynthesis and subsequently applying X-ray crystallography to elucidate the protein's st ...
of Switzerland, and the technology was further developed by Dr. Marco
Ganser at the
Swiss Federal Institute of Technology in Zurich, later of
Ganser-Hydromag AG (est. 1995) in Oberägeri.
The first common-rail-Diesel-engine used in a road vehicle was the MN 106-engine by East German ''
VEB IFA Motorenwerke Nordhausen''. It was built into a single
IFA W50
The IFA W 50 is a medium-duty truck built by the East German IFA conglomerate at their Ludwigsfelde plant from 1965 until 1990. A total of about 572,000 were built in Ludwigsfelde, with an unknown additional number of special-use vehicles assem ...
in 1985. Due to a lack of funding, the development was cancelled and mass production was never achieved.
The first successful use in a mass production vehicle began in Japan by the mid-1990s. Dr. Shohei Itoh and Masahiko Miyaki of the
Denso Corporation, a Japanese automotive-parts manufacturer, developed the common rail fuel system for heavy-duty vehicles and turned it into practical use on their ECD-U2 common rail system mounted on the
Hino Ranger
The Hino Ranger ( ja, 日野レンジャー) is a medium or heavy duty commercial truck manufactured by Japanese automobile manufacturer Hino Motors since 1964.
Outside of Japan, it is also known as the '500 Series' and as part of the 'F-Series,' ...
truck and sold for general use in 1995. Denso claims the first commercial high-pressure common rail system in 1995.
Modern common rail systems, although working on the same principle, are governed by an
engine control unit
An engine control unit (ECU), also commonly called an engine control module (ECM), is a type of electronic control unit that controls a series of actuators on an internal combustion engine to ensure optimal engine performance. It does this by re ...
, which opens each injector electrically rather than mechanically. This was extensively prototyped in the 1990s with collaboration between
Magneti Marelli
Magneti Marelli S.p.A. () is an Italian developer and manufacturer of components for the automotive industry. The firm is headquartered in Corbetta, Italy, and includes 86 manufacturing plants, 12 R&D centres, and 26 application centers in 19 c ...
, Centro Ricerche Fiat, and Elasis. After research and development by the
Fiat Group
Stellantis Italy, formerly known as Fiat Group Automobiles S.p.A. from 2007 to 2014 and FCA Italy S.p.A. from 2014 to 2021, is the Italian subsidiary of the multinational automaker Stellantis, dedicated to the production and selling of passenger ...
, the design was acquired by the German company
Robert Bosch GmbH
Robert Bosch GmbH (; ), commonly known as Bosch and stylized as BOSCH, is a German multinational engineering and technology company headquartered in Gerlingen, Germany. The company was founded by Robert Bosch in Stuttgart in 1886. Bosch is 9 ...
for completion of development and refinement for mass production. In hindsight, the sale appeared to be a strategic error for Fiat, as the new technology proved to be highly profitable. The company had little choice but to sell Bosch a licence, as it was in a poor financial state at the time and lacked the resources to complete development on its own.
In 1997, they extended its use for passenger cars. The first passenger car to use the common rail system was the 1997 model
Alfa Romeo 156
The Alfa Romeo 156 (Type 932) is a compact executive car produced by the Italian automobile manufacturer Alfa Romeo. It was introduced at the 1997 Frankfurt Motor Show as the replacement for the Alfa Romeo 155. The 156 received a positive recep ...
with a 2.4-L
JTD engine
Multijet is Fiat Chrysler Automobiles' term for its current common rail direct injection turbodiesel engine range. Most of the Fiat, Alfa Romeo, Lancia range as well as certain Chrysler, RAM Trucks, Jeep and Maserati vehicles are equipped w ...
,
and later that same year,
Mercedes-Benz
Mercedes-Benz (), commonly referred to as Mercedes and sometimes as Benz, is a German luxury and commercial vehicle automotive brand established in 1926. Mercedes-Benz AG (a Mercedes-Benz Group subsidiary established in 2019) is headquartere ...
introduced it in their
W202
Mercedes-Benz W202 is the internal designation for a compact sedan/saloon manufactured and marketed by Mercedes-Benz 1993–2000, as the first generation of the C-Class, now in its fifth generation. Replacing the 190 series/W201 in June 1993, ...
model.
Applications
The common rail system is suitable for all types of road cars with diesel engines, ranging from
city car
The A-segment is the 1st category in the passenger car classification system defined by the European Commission. It is used for city cars, the smallest category of passenger cars defined.
A-segment sales represent approx. 7-8% of the market in ...
s (such as the
Fiat Panda
The Fiat Panda is a city car manufactured and marketed by Fiat since 1980, currently in its third generation.
The first generation Panda (Mk 1: 1980–1986 & Mk2: 1986–2003), introduced in 1980, was a two-box, three-door hatchback designed b ...
) to
executive car
Executive car is a British term for a large car which is equivalent to the European E-segment and American full-size classifications. Executive cars are larger than compact executive cars (and the non-luxury equivalent mid-size cars), and small ...
s (such as the
Audi A8
The Audi A8 is a full-size luxury sedan manufactured and marketed by the German automaker Audi since 1994. Succeeding the Audi V8, and now in its fourth generation, the A8 has been offered with both front- or permanent all-wheel drive—and in s ...
). The main suppliers of modern common rail systems are
BOSCH,
Delphi
Delphi (; ), in legend previously called Pytho (Πυθώ), in ancient times was a sacred precinct that served as the seat of Pythia, the major oracle who was consulted about important decisions throughout the ancient classical world. The oracle ...
,
Denso, and
Siemens VDO
VDO is a German brand of Continental Automotive which makes automotive electronics and mechatronics for powertrains, engine management systems and fuel injection systems. A full range of Tachograph, Data Management, and Telematics products are p ...
(now owned by
Continental AG
Continental AG, commonly known as Continental or colloquially as Conti, is a German multinational automotive parts manufacturing company specializing in tires, brake systems, interior electronics, automotive safety, powertrain and chassis compo ...
).
Acronyms and branding used
![Bosch common rail injector](https://upload.wikimedia.org/wikipedia/commons/e/e2/Bosch_common_rail_injector.JPG)
The automotive manufacturers refer to their common rail engines by their own
brand
A brand is a name, term, design, symbol or any other feature that distinguishes one seller's good or service from those of other sellers. Brands are used in business, marketing, and advertising for recognition and, importantly, to create an ...
names:
*
Ashok Leyland
Ashok Leyland is an Indian multinational automotive manufacturer, headquartered in Chennai. It is owned by the Hinduja Group. It was founded in 1948 as Ashok Motors and became Ashok Leyland in the year 1955. Ashok Leyland is the second-most ...
: CRS (used in U Truck and E4 Busses)
*
Audi
Audi AG () is a German automotive manufacturer of luxury vehicles headquartered in Ingolstadt, Bavaria, Germany. As a subsidiary of its parent company, the Volkswagen Group, Audi produces vehicles in nine production facilities worldwide.
Th ...
: TDI, BiTDi The "Bi" stands for
BiTurbo
Twin-turbo (not to be confused with a twincharger setup, which is a combination of a supercharger and a turbocharger) refers to an engine in which two turbochargers work in tandem to compress the intake fuel/air mixture (or intake air, in the case ...
*
BMW Group (
BMW and
Mini
The Mini is a small, two-door, four-seat car, developed as ADO15, and produced by the British Motor Corporation (BMC) and its successors, from 1959 through 2000. Minus a brief hiatus, original Minis were built for four decades and sold during ...
): d (also used in the
Land Rover Freelander
The Land Rover Freelander is a compact luxury crossover SUV that was manufactured and marketed by Land Rover from 1997 to 2015. The second generation was sold from 2007 to 2015 in North America and the Middle East as the LR2 and in Europe as the ...
as TD4 and the
Rover 75
The Rover 75 is an executive car manufactured initially by the Rover Group and later by MG Rover, under the Rover marque and available over a single generation with front-wheel drive in either saloon/sedan or station wagon/estate configuratio ...
and
MG ZT
The MG ZT is a car which was produced by MG Rover from 2001 to 2005. It was offered in saloon and estate versions, the latter designated as the MG ZT-T. Styling is similar to the Rover 75, upon which it was based, although various modifications, ...
as CDT and CDTi), D and SD
*
Chevrolet
Chevrolet ( ), colloquially referred to as Chevy and formally the Chevrolet Motor Division of General Motors Company, is an American automobile division of the American manufacturer General Motors (GM). Louis Chevrolet (1878–1941) and ous ...
(owned by
GM): VCDi (licensed from
VM Motori
VM Motori S.p.A. is an Italian diesel engine manufacturing company which is wholly owned by Stellantis. VM headquarters and main production facilities are located in Cento, in Emilia-Romagna, Italy.
History
VM Motori was founded by two entre ...
) and Duramax Diesel
*
Chrysler
Stellantis North America (officially FCA US and formerly Chrysler ()) is one of the " Big Three" automobile manufacturers in the United States, headquartered in Auburn Hills, Michigan. It is the American subsidiary of the multinational automoti ...
CRD
*
Citroën
Citroën () is a French automobile brand. The "Automobiles Citroën" manufacturing company was founded in March 1919 by André Citroën. Citroën is owned by Stellantis since 2021 and previously was part of the PSA Group after Peugeot acquired ...
: HDi, e-HDi and BlueHDi
*
Cummins
Cummins Inc. is an American multinational corporation that designs, manufactures, and distributes engines, filtration, and power generation products. Cummins also services engines and related equipment, including fuel systems, controls, air ...
and
Scania
Scania, also known by its native name of Skåne (, ), is the southernmost of the historical provinces of Sweden, provinces (''landskap'') of Sweden. Located in the south tip of the geographical region of Götaland, the province is roughly conte ...
: XPI (developed under joint venture)
*
Cummins
Cummins Inc. is an American multinational corporation that designs, manufactures, and distributes engines, filtration, and power generation products. Cummins also services engines and related equipment, including fuel systems, controls, air ...
: CCR (
Cummins
Cummins Inc. is an American multinational corporation that designs, manufactures, and distributes engines, filtration, and power generation products. Cummins also services engines and related equipment, including fuel systems, controls, air ...
pump with
Bosch injectors)
*
Daimler: CDI
*
Fiat Group
Stellantis Italy, formerly known as Fiat Group Automobiles S.p.A. from 2007 to 2014 and FCA Italy S.p.A. from 2014 to 2021, is the Italian subsidiary of the multinational automaker Stellantis, dedicated to the production and selling of passenger ...
(
Fiat
Fiat Automobiles S.p.A. (, , ; originally FIAT, it, Fabbrica Italiana Automobili di Torino, lit=Italian Automobiles Factory of Turin) is an Italian automobile manufacturer, formerly part of Fiat Chrysler Automobiles, and since 2021 a subsidiary ...
,
Alfa Romeo
Alfa Romeo Automobiles S.p.A. () is an Italian luxury car manufacturer and a subsidiary of Stellantis. The company was founded on 24 June 1910, in Milan, Italy. "Alfa" is an acronym of its founding name, "Anonima Lombarda Fabbrica Automobili." ...
and
Lancia
Lancia () is an Italian car manufacturer and a subsidiary of FCA Italy S.p.A., which is currently a Stellantis division. The present legal entity of Lancia was formed in January 2007 when its corporate parent reorganised its businesses, but it ...
):
JTD
Multijet is Fiat Chrysler Automobiles' term for its current common rail direct injection turbodiesel engine range. Most of the Fiat, Alfa Romeo, Lancia range as well as certain Chrysler, RAM Trucks, Jeep and Maserati vehicles are equipped with Mu ...
(also branded as MultiJet, JTDm, and by supplied manufacturers as TDi, CDTi, TCDi, TiD, TTiD, DDiS and QuadraJet)
*
Ford Motor Company
Ford Motor Company (commonly known as Ford) is an American multinational automobile manufacturer headquartered in Dearborn, Michigan, United States. It was founded by Henry Ford and incorporated on June 16, 1903. The company sells automobi ...
: TDCi (
Duratorq
The Ford Duratorq engine, commonly referred to as Duratorq, is the marketing name of a range of Ford diesel engines first introduced in 2000 for the Ford Mondeo range of cars. The larger capacity 5-cylinder units use the Power Stroke branding wh ...
and
Powerstroke
Power Stroke is the name used by a family of diesel engines for trucks produced by Ford Motor Company and Navistar International (until 2010) for Ford products since 1994. Along with its use in the Ford F-Series (including the Ford Super Duty tru ...
) and EcoBlue Diesel
*
Honda
is a Japanese public multinational conglomerate manufacturer of automobiles, motorcycles, and power equipment, headquartered in Minato, Tokyo, Japan.
Honda has been the world's largest motorcycle manufacturer since 1959, reaching a product ...
: i-CTDI and i-DTEC
*
Hyundai Hyundai is a South Korean industrial conglomerate ("chaebol"), which was restructured into the following groups:
* Hyundai Group, parts of the former conglomerate which have not been divested
** Hyundai Mobis, Korean car parts company
** Hyundai ...
,
Kia
Kia Corporation, commonly known as Kia (, ; formerly known as Kyungsung Precision Industry and Kia Motors Corporation), is a South Korean multinational automobile manufacturer headquartered in Seoul, South Korea. It is South Korea's second lar ...
and
Genesis
Genesis may refer to:
Bible
* Book of Genesis, the first book of the biblical scriptures of both Judaism and Christianity, describing the creation of the Earth and of mankind
* Genesis creation narrative, the first several chapters of the Book of ...
: CRDi
*
IKCO
Iran Khodro ( fa, ایرانخودرو, ''Irân Xodro''), branded as IKCO, is an Iranian automaker headquartered in Tehran. IKCO was founded in 1962 as Iran National (, ''Irân Nâsionâl''). The public company manufactures vehicles, includin ...
:
EFD
*
Isuzu: iTEQ, Ddi and DI TURBO
*
Jaguar
The jaguar (''Panthera onca'') is a large cat species and the only living member of the genus '' Panthera'' native to the Americas. With a body length of up to and a weight of up to , it is the largest cat species in the Americas and the th ...
: d
*
Jeep
Jeep is an American automobile marque, now owned by multi-national corporation Stellantis. Jeep has been part of Chrysler since 1987, when Chrysler acquired the Jeep brand, along with remaining assets, from its previous owner American Moto ...
: CRD and
EcoDiesel
The EcoDiesel is a diesel engine used in Ram Trucks and Jeep vehicles since 2014. Introduced by Fiat Chrysler Automobiles, the EcoDiesel name was used for two different engines. The first was the VM Motori L630, the North American variant of t ...
*
Komatsu: Tier3, Tier4, 4D95 and higher ''HPCR''-series
*
Land Rover
Land Rover is a British brand of predominantly four-wheel drive, off-road capable vehicles, owned by multinational car manufacturer Jaguar Land Rover (JLR), since 2008 a subsidiary of India's Tata Motors. JLR currently builds Land Rovers ...
: TD4, eD4, SD4, TD6, TDV6, SDV6, TDV8, SDV8
*
Lexus
is the luxury vehicle division of the Japanese automaker Toyota. The Lexus brand is marketed in more than 90 countries and territories worldwide and is Japan's largest-selling make of premium cars. It has ranked among the 10 largest Japanese ...
: d (e.g. 450d and 220d)
*
Mahindra: CRDe, m2DiCR, mEagle, mHawk, mFalcon and mPower (Trucks)
*
Maserati
Maserati S.p.A. () is an Italian luxury vehicle manufacturer. Established on 1 December 1914, in Bologna, Italy, the company's headquarters are now in Modena, and its emblem is a trident. The company has been owned by Stellantis since 2021. Ma ...
: Diesel
*
Mazda
, commonly referred to as simply Mazda, is a Japanese multinational automotive manufacturer headquartered in Fuchū, Hiroshima, Japan.
In 2015, Mazda produced 1.5 million vehicles for global sales, the majority of which (nearly one m ...
: MZR-CD and Skyactiv-D (are manufactured by the
Ford
Ford commonly refers to:
* Ford Motor Company, an automobile manufacturer founded by Henry Ford
* Ford (crossing), a shallow crossing on a river
Ford may also refer to:
Ford Motor Company
* Henry Ford, founder of the Ford Motor Company
* Ford F ...
and
PSA Peugeot Citroën
The PSA Group (), legally known as Peugeot S.A. (Peugeot Société Anonyme, trading as Groupe PSA; formerly known as PSA Peugeot Citroën from 1991 to 2016) was a French multinational automotive manufacturing company which produced automobiles ...
joint venture) and earlier DiTD
*
Mercedes-Benz
Mercedes-Benz (), commonly referred to as Mercedes and sometimes as Benz, is a German luxury and commercial vehicle automotive brand established in 1926. Mercedes-Benz AG (a Mercedes-Benz Group subsidiary established in 2019) is headquartere ...
: CDI and d
*
Mitsubishi
The is a group of autonomous Japanese multinational companies in a variety of industries.
Founded by Yatarō Iwasaki in 1870, the Mitsubishi Group historically descended from the Mitsubishi zaibatsu, a unified company which existed from 1870 ...
: Di-D
*
Nissan
, trade name, trading as Nissan Motor Corporation and often shortened to Nissan, is a Japanese multinational corporation, multinational Automotive industry, automobile manufacturer headquartered in Nishi-ku, Yokohama, Japan. The company sells ...
: DDTi
*
Opel
Opel Automobile GmbH (), usually shortened to Opel, is a German automobile manufacturer which has been a subsidiary of Stellantis since 16 January 2021. It was owned by the American automaker General Motors from 1929 until 2017 and the PSA Grou ...
/
Vauxhall
Vauxhall ( ) is a district in South West London, part of the London Borough of Lambeth, England. Vauxhall was part of Surrey until 1889 when the County of London was created. Named after a medieval manor, "Fox Hall", it became well known for ...
: DTI, CDTI, BiTurbo CDTI, CRI, Turbo D and BiTurbo D
*
Porsche
Dr. Ing. h.c. F. Porsche AG, usually shortened to Porsche (; see #Pronunciation, below), is a German automobile manufacturer specializing in high-performance sports cars, SUVs and sedans, headquartered in Stuttgart, Baden-Württemberg, Germany ...
: Diesel
*
Proton
A proton is a stable subatomic particle, symbol , H+, or 1H+ with a positive electric charge of +1 ''e'' elementary charge. Its mass is slightly less than that of a neutron and 1,836 times the mass of an electron (the proton–electron mass ...
: SCDi
*
Groupe PSA (Peugeot, Citroën and DS): HDi, e-HDi or BlueHDi (developed under joint venture with
Ford
Ford commonly refers to:
* Ford Motor Company, an automobile manufacturer founded by Henry Ford
* Ford (crossing), a shallow crossing on a river
Ford may also refer to:
Ford Motor Company
* Henry Ford, founder of the Ford Motor Company
* Ford F ...
) – See
PSA HDi engine
PSA, PsA, Psa, or psa may refer to:
Biology and medicine
* Posterior spinal artery
* Primary systemic amyloidosis, a disease caused by the accumulation of abnormal proteins
* Prostate-specific antigen, an enzyme used as a blood tracer for pros ...
*
Renault
Groupe Renault ( , , , also known as the Renault Group in English; legally Renault S.A.) is a French multinational automobile manufacturer established in 1899. The company produces a range of cars and vans, and in the past has manufactured ...
,
Dacia
Dacia (, ; ) was the land inhabited by the Dacians, its core in Transylvania, stretching to the Danube in the south, the Black Sea in the east, and the Tisza in the west. The Carpathian Mountains were located in the middle of Dacia. It thus r ...
and
Nissan
, trade name, trading as Nissan Motor Corporation and often shortened to Nissan, is a Japanese multinational corporation, multinational Automotive industry, automobile manufacturer headquartered in Nishi-ku, Yokohama, Japan. The company sells ...
: dCi and BLUEdCi (Infiniti uses some dCi engines as part of the Renault-Nissan Alliance, branded d)
*
Saab
Saab or SAAB may refer to:
Brands and enterprises
* Saab Group, a Swedish aerospace and defence company, formerly known as SAAB, and later as Saab AB
** Datasaab, a former computer company, started as spin off from Saab AB
* Saab Automobile, a fo ...
: TiD (The 2.2 turbo diesel engine was also called "TiD", but it didn't have Common rail) and TTiD The double "T" stands for
Twin-Turbo
Twin-turbo (not to be confused with a twincharger setup, which is a combination of a supercharger and a turbocharger) refers to an engine in which two turbochargers work in tandem to compress the intake fuel/air mixture (or intake air, in the case ...
*
SsangYong: XDi, eXDI, XVT or D
*
Subaru
( or ; ) is the automaker, automobile manufacturing division of Japanese transportation conglomerate (company), conglomerate Subaru Corporation (formerly known as Fuji Heavy Industries), the Automotive industry#By manufacturer, twenty-first ...
: TD, D or BOXER DIESEL (as of Jan 2008)
*
Suzuki
is a Japan, Japanese multinational corporation headquartered in Minami-ku, Hamamatsu, Japan. Suzuki manufactures automobiles, motorcycles, All-terrain vehicle, all-terrain vehicles (ATVs), outboard motor, outboard marine engines, wheelchairs ...
: DDiS
*
Tata: 2.2 VTT DiCOR (used in large SUV-class such as
Safari
A safari (; ) is an overland journey to observe wild animals, especially in eastern or southern Africa. The so-called "Big Five" game animals of Africa – lion, leopard, rhinoceros, elephant, and Cape buffalo – particularly form an importa ...
), VARICOR (used in large SUV-class such as
Safari Storme,
Aria
In music, an aria (Italian: ; plural: ''arie'' , or ''arias'' in common usage, diminutive form arietta , plural ariette, or in English simply air) is a self-contained piece for one voice, with or without instrumental or orchestral accompanime ...
and
Hexa
Numeral or number prefixes are prefixes derived from numerals or occasionally other numbers. In English and many other languages, they are used to coin numerous series of words. For example:
* unicycle, bicycle, tricycle (1-cycle, 2-cycle, 3-cy ...
),1.05 Revotorq CR3 (used in
Tiago and
Tigor) 1.5 Revotorq CR05 (used in
Nexon
Nexon Co., Ltd. is a global video game publisher, listed in Japan, that specializes in online Virtual World games for PCs, consoles and mobile. Nexon is one of the world’s ten largest interactive game companies based on market capitalization a ...
and
Altroz), 1.4 CR4 (used in
Indica,
Indigo
Indigo is a deep color close to the color wheel blue (a primary color in the RGB color space), as well as to some variants of ultramarine, based on the ancient dye of the same name. The word "indigo" comes from the Latin word ''indicum'', m ...
), 3.0 CR4 (used in
Sumo gold) 1.3 Quadrajet (supplied by
Fiat
Fiat Automobiles S.p.A. (, , ; originally FIAT, it, Fabbrica Italiana Automobili di Torino, lit=Italian Automobiles Factory of Turin) is an Italian automobile manufacturer, formerly part of Fiat Chrysler Automobiles, and since 2021 a subsidiary ...
and used in
Indica Vista,
Indigo Manza and
Zest
Zest may refer to:
Common usage
* Zest (ingredient), the outer peel of a citrus fruit
** Zester, a tool for preparing zest
** Twist (cocktail garnish), a piece of zest
* Zest (positive psychology), a component of character
Brands
* Zest (brand ...
), and 2.0 Kryotec (also supplied by Fiat and used in SUV
Harrier and All new
Safari
A safari (; ) is an overland journey to observe wild animals, especially in eastern or southern Africa. The so-called "Big Five" game animals of Africa – lion, leopard, rhinoceros, elephant, and Cape buffalo – particularly form an importa ...
),3.3 L Turbotronn and 5L Turbotronn ( used in M&HCV Trucks).
*
*
*
Toyota
is a Japanese multinational automotive manufacturer headquartered in Toyota City, Aichi, Japan. It was founded by Kiichiro Toyoda and incorporated on . Toyota is one of the largest automobile manufacturers in the world, producing about 10 ...
: D-4D and D-CAT
*
Volkswagen Group
Volkswagen AG (), known internationally as the Volkswagen Group, is a German multinational automotive manufacturer headquartered in Wolfsburg, Lower Saxony, Germany. The company designs, manufactures and distributes passenger and commercial ...
(
Volkswagen
Volkswagen (),English: , . abbreviated as VW (), is a German Automotive industry, motor vehicle manufacturer headquartered in Wolfsburg, Lower Saxony, Germany. Founded in 1937 by the German Labour Front under the Nazi Party and revived into a ...
,
Audi
Audi AG () is a German automotive manufacturer of luxury vehicles headquartered in Ingolstadt, Bavaria, Germany. As a subsidiary of its parent company, the Volkswagen Group, Audi produces vehicles in nine production facilities worldwide.
Th ...
,
SEAT
A seat is a place to sit. The term may encompass additional features, such as back, armrest, head restraint but also headquarters in a wider sense.
Types of seat
The following are examples of different kinds of seat:
* Armchair (furniture), ...
and
Škoda
Škoda means ''pity'' in the Czech and Slovak languages. It may also refer to:
Czech brands and enterprises
* Škoda Auto, automobile and previously bicycle manufacturer in Mladá Boleslav
** Škoda Motorsport, the division of Škoda Auto respons ...
):
TDI (more recent models use common rail, as opposed to the earlier
unit injector engines). Bentley term their Bentayga diesel simply Diesel
*
Volvo
The Volvo Group ( sv, Volvokoncernen; legally Aktiebolaget Volvo, shortened to AB Volvo, stylized as VOLVO) is a Swedish multinational manufacturing corporation headquartered in Gothenburg. While its core activity is the production, distributio ...
: D, D2, D3, D4 and D5 engines (some are manufactured by
Ford
Ford commonly refers to:
* Ford Motor Company, an automobile manufacturer founded by Henry Ford
* Ford (crossing), a shallow crossing on a river
Ford may also refer to:
Ford Motor Company
* Henry Ford, founder of the Ford Motor Company
* Ford F ...
and
PSA Peugeot Citroën
The PSA Group (), legally known as Peugeot S.A. (Peugeot Société Anonyme, trading as Groupe PSA; formerly known as PSA Peugeot Citroën from 1991 to 2016) was a French multinational automotive manufacturing company which produced automobiles ...
),
Volvo Penta
Volvo Penta was founded as Penta in 1907 with the production of its first marine engine, the B1. The Penta company soon became an established internal combustion engine manufacturer, which in 1927 delivered the engine for Volvo's first passenge ...
D-series engines
Principles
![Common Rail Scheme](https://upload.wikimedia.org/wikipedia/commons/3/3f/Common_Rail_Scheme.svg)
Solenoid or
piezoelectric
Piezoelectricity (, ) is the electric charge that accumulates in certain solid materials—such as crystals, certain ceramics, and biological matter such as bone, DNA, and various proteins—in response to applied Stress (mechanics), mechanical s ...
valves make possible fine
electronic control over the fuel-injection time and quantity, and the higher pressure that the common rail technology makes available provides better fuel
atomisation. To lower engine
noise
Noise is unwanted sound considered unpleasant, loud or disruptive to hearing. From a physics standpoint, there is no distinction between noise and desired sound, as both are vibrations through a medium, such as air or water. The difference arise ...
, the engine's electronic control unit can inject a small amount of diesel just before the main injection event ("pilot" injection), thus reducing its explosiveness and vibration, as well as optimising injection timing and quantity for variations in fuel quality, cold starting, and so on. Some advanced common rail fuel systems perform as many as five injections per stroke.
Common rail engines require a very short to no heating-up time, depending on the ambient temperature, and produce lower engine noise and emissions than older systems.
Diesel engines have historically used various forms of fuel injection. Two common types include the
unit-injection system and the
distributor/inline-pump systems. While these older systems provide accurate fuel quantity and injection timing control, they are limited by several factors:
*They are cam driven, and injection pressure is proportional to engine speed. This typically means that the highest injection pressure can only be achieved at the highest engine speed and the maximum achievable injection pressure decreases as engine speed decreases. This relationship is true with all pumps, even those used on common rail systems. With unit or distributor systems, the injection pressure is tied to the instantaneous pressure of a single pumping event with no accumulator, thus the relationship is more prominent and troublesome.
*They are limited in the number and timing of injection events that can be commanded during a single combustion event. While multiple injection events are possible with these older systems, it is much more difficult and costly to achieve.
*For the typical distributor/inline system, the start of injection occurs at a predetermined pressure (often referred to as pop pressure) and ends at a predetermined pressure. This characteristic results from "dumb" injectors in the cylinder head which open and close at pressures determined by the spring preload applied to the plunger in the injector. Once the pressure in the injector reaches a predetermined level, the plunger lifts and injection starts.
In common rail systems, a high-pressure pump stores a reservoir of fuel at high pressure — up to and above . The term "common rail" refers to the fact that all of the
fuel injector
Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines.
All comp ...
s are supplied by a common fuel rail which is nothing more than a pressure accumulator where the fuel is stored at high pressure. This accumulator supplies multiple fuel injectors with high-pressure fuel. This simplifies the purpose of the high-pressure pump in that it only needs to maintain a target pressure (either mechanically or electronically controlled). The fuel injectors are typically controlled by the
engine control unit
An engine control unit (ECU), also commonly called an engine control module (ECM), is a type of electronic control unit that controls a series of actuators on an internal combustion engine to ensure optimal engine performance. It does this by re ...
(ECU). When the fuel injectors are electrically activated, a hydraulic valve (consisting of a nozzle and plunger) is mechanically or hydraulically opened and fuel is sprayed into the cylinders at the desired pressure. Since the fuel pressure energy is stored remotely and the injectors are electrically actuated, the injection pressure at the start and end of injection is very near the pressure in the accumulator (rail), thus producing a square injection rate. If the accumulator, pump, and plumbing are sized properly, the injection pressure and rate will be the same for each of the multiple injection events.
Third-generation common rail diesels now feature
piezoelectric
Piezoelectricity (, ) is the electric charge that accumulates in certain solid materials—such as crystals, certain ceramics, and biological matter such as bone, DNA, and various proteins—in response to applied Stress (mechanics), mechanical s ...
injectors for increased precision, with fuel pressures up to .
See also
*
Hydraulically actuated electronic unit injection
*
Turbocharged direct injection
TDI (Turbocharged Direct Injection) is Volkswagen Group's term for its current common rail direct injection turbodiesel engine range that have an intercooler in addition to the turbo compressor.
TDI engines are used in motor vehicles sold by th ...
*
Unit pump
The Unit Pump system is a modular high-pressure diesel injection system, which is closely related to the unit Injector system, and is designed for use in commercial vehicle diesel engines.
The systems use an individual injection pump mounted on ...
*
Water sensor
References
External links
Common Rail Direct Injection System or CRDI System working and advanatagesBrief Summary about working of CRDI EngineAnimation explaining common rail functioning
{{Piston engine configurations
Diesel engine technology
Engine fuel system technology
ja:噴射ポンプ#コモンレール式