The

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 ...

KR engine family is a

straight-3 A straight-three engine (also called an inline-triple or inline-three) is a three-cylinder piston engine where cylinders are arranged in a line along a common crankshaft. Less common than straight-four engines, straight-three engines have nonethe ...

piston engine A reciprocating engine, also often known as a piston engine, is typically a heat engine that uses one or more reciprocating pistons to convert high temperature and high pressure into a rotating motion. This article describes the common featu ...

, designed by

Daihatsu , commonly known as Daihatsu, is a Japanese automobile manufacturer and one of the oldest surviving Japanese internal combustion engine manufacturers. The company's headquarters are located in Ikeda, Osaka Prefecture. Historically, Daihatsu was ...

, a subsidiary of Toyota. The 1KR series uses aluminium engine blocks and chain driven

DOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...

cylinder heads. It uses

multi-point 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 compr ...

, and has 4 valves per cylinder. Some versions have

VVT-i VVT-i, or Variable Valve Timing with intelligence, is an automobile variable valve timing technology developed by Toyota. It was first introduced in 1995 with the ''2JZ-GE'' engine found in the JZS155 Toyota Crown and Crown Majesta. The VVT-i ...

variable valve timing. The engine is exceptionally light: with all ancillaries. This is due to the nature of the applications and weight of city cars.

1KR-FE

The 1KR-FE is a version built in

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

and

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populous ...

. Bore and stroke is , with a

compression ratio The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum values. A fundamental specification for such engines, it is measured two ways: the stati ...

of 10.5:1. Output is at 6000 rpm with of torque at 4800 rpm - and a rev-limit of 6500 rpm - or at 6000 rpm with of torque at 3600 rpm. When originally on sale it met European emission standard EU4 requirements and had levels of 109 g/km, but current applications meet European emission standard EU5 and can have levels as low as 99 g/km. This engine has been given the 2007, 2008, 2009 and 2010 International Engine of the Year awards in the sub-1.0 liter category. The engine was also adapted to meet European emission standard EU6 and can have levels as low as 88/89 g/km in

Toyota Aygo The Toyota Aygo is a city car ( A-segment) marketed by Toyota mainly in the European market between 2005 and 2021 across two generations. The Aygo was first displayed at the 2005 Geneva International Motor Show. It was built alongside the relat ...

Citroën C1 The Citroën C1 is a city car marketed by Citroën from June 2005 to January 2022, originally developed as part of the B-Zero project by PSA Peugeot Citroën in a joint venture with Toyota, with two generations produced. The C1 was developed alo ...

Peugeot 108 The Peugeot 108 is a city car launched by French manufacturer Peugeot in March 2014 at the Geneva Motor Show. The 108 is related to the Citroën C1 and Toyota Aygo, and shares their floorpan, engines, transmission and electrics. Sales commenced in ...

since 2014 in NEDC.

Applications

* Daihatsu Boon/Toyota Passo/Daihatsu Sirion/Subaru Justy *

(2005–2021) *

Toyota Vitz The is a subcompact car produced by the Japanese automobile manufacturer Toyota from 1999 to 2019 in a three- or five-door hatchback body styles. The "Vitz" nameplate was used consistently in Japan, while most international markets received the ...

/ Yaris (2005–present) *

Toyota Belta The , referred to in North American and Australian markets as the Yaris and in Asian markets as the Vios, is a subcompact sedan manufactured by Toyota. The successor to the Platz sedan, the Belta has increased in size over the previous gen ...

(2006–2012) * Toyota iQ (2008–2015) *

Daihatsu Cuore ''Cuore'', , the Italian-language Italian (''italiano'' or ) is a Romance language of the Indo-European language family that evolved from the Vulgar Latin of the Roman Empire. Together with Sardinian, Italian is the least divergent lang ...

L276 (2007–2013) *

Peugeot 107 The Peugeot 107 is a city car produced by French automaker Peugeot, launched in June 2005, and produced until 2014. The 107 was developed by the B-Zero project of PSA Peugeot Citroën in a joint venture with Toyota; the Citroën C1 and Toyota A ...

(2005–2014) *

(2014–2021) * Daihatsu Thor/Toyota Tank/Toyota Roomy/Subaru Justy (2016–present)

1KR-DE

The 1KR-DE is the non-

variant of the 1KR engine made by Daihatsu. It produces less power and

torque In physics and mechanics, torque is the rotational equivalent of linear force. It is also referred to as the moment of force (also abbreviated to moment). It represents the capability of a force to produce change in the rotational motion of th ...

than the 1KR-FE. Output is at 6000 rpm and of torque at 3600 rpm. Bore and stroke is , while the

engine displacement Engine displacement is the measure of the cylinder volume swept by all of the pistons of a piston engine, excluding the combustion chambers. It is commonly used as an expression of an engine's size, and by extension as a loose indicator of the ...

is . The 1KR-DE was specially designed for the Indonesian LCGC (Low Cost Green Car) market to reduce cost. The cylinder head cover is made from a light weight plastic-resin material. The

exhaust manifold In automotive engineering, an exhaust manifold collects the exhaust gases from multiple cylinders into one pipe. The word ''manifold'' comes from the Old English word ''manigfeald'' (from the Anglo-Saxon ''manig'' anyand ''feald'' old and refe ...

is integrated to the cylinder head together with the

catalytic converter A catalytic converter is an exhaust emission control device that converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction. Catalytic converters are usually ...

and

oxygen sensor An oxygen sensor (or lambda sensor, where lambda refers to air–fuel equivalence ratio, usually denoted by λ) or probe or sond, is an electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analysed. It was ...

to save even more weight as well as helping the engine to warm up quicker, reducing total exhaust emissions. There was an overall saving of .

Applications

Daihatsu Ayla The Daihatsu Ayla is a city car designed by Daihatsu and manufactured by Astra Daihatsu Motor in Indonesia, primarily developed for emerging markets. The Ayla is sold by Toyota as the Toyota Agya in Indonesia, South Africa, Tunisia, Americas ( ...

(2013–present) * Toyota Agya/Wigo (2013–2017) *

Daihatsu Hi-Max The is a cab over microvan and kei truck produced and sold by the Japanese automaker Daihatsu since 1960. Despite the similarities between the Hijet name and Toyota's naming scheme for its trucks and vans (Toyota HiAce, HiAce and Toyota Hilux, ...

, based on tenth generation Hijet Truck (2016–2019)

1KR-DE2

The 1KR-DE2 is the more powerful variant of the 1KR-DE engine which is redesigned by

Perodua The (''Second Automobile Manufacturer Private Limited''), usually abbreviated to Perodua (), is Malaysia's largest car manufacturer, followed by PROTON Holdings, Proton. History It was established in 1992 and launched its first car, the Pe ...

. It produces at 6000 rpm and of torque at 3600 rpm. Like the 1KR-DE, bore and stroke are at , respectively and

remains at The 1KR-DE2 achieves

Euro IV The European emission standards are vehicle emission standards for pollution from the use of new land surface vehicles sold in the European Union and EEA member states and the UK, and ships in EU waters. The standards are defined in a seri ...

emission standard and it is very fuel efficient due to the ECO Mode, where the engine will exchange drop one cylinder for every two cycles, effectively achieving the economy of a engine, surpasses the 1KR-DE. The compression ratio for this engine is 11:1.

Applications

Perodua Axia The Perodua Axia is a five-door hatchback produced by Malaysian automobile manufacturer Perodua. It was launched on 15 September 2014 as the successor to the Viva. The car takes over the title of being the most affordable car in Malaysia from the ...

(2014–2017)

1KR-VE

The 1KR-VE is a more powerful variant made by Perodua specifically improved version from the 1KR-DE2 which is made for the newest edition in the Perodua family. New 1.0-litre VVT-i engine is lighter & compact for better

fuel consumption A fuel is any material that can be made to react with other substances so that it releases energy as thermal energy or to be used for work. The concept was originally applied solely to those materials capable of releasing chemical energy but ...

, better performance, reduced vibration & noise level. It was specifically made for the 1.0-litre variant for Perodua's first solely in-house manufactured car which is the Perodua Bezza. It is a modified and refined version of the 1KR-DE2 engine from the Perodua Axia. The new 1KR-VE engine produces at 6,000 rpm and at 4,400 rpm, offering a mild and increase over the Axia's 1KR-DE2 plant. Perodua claims ECE fuel consumption figures of for the manual variant and with the automatic, both exhibiting a improvement over the old 1KR-DE2. The new 1KR-VE engine now features variable-valve timing with intelligence (VVT-i) on the intake valves. Several minor changes and refinements were also introduced for increased

fuel efficiency Fuel efficiency is a form of thermal efficiency, meaning the ratio of effort to result of a process that converts chemical potential energy contained in a carrier (fuel) into kinetic energy or work. Overall fuel efficiency may vary per device, wh ...

and more linear power delivery. Notable changes include a higher 11.5:1 compression ratio, a high-tumble intake port, a longer

intake manifold In automotive engineering, an inlet manifold or intake manifold (in American English) is the part of an engine that supplies the fuel/air mixture to the cylinders. The word ''manifold'' comes from the Old English word ''manigfeald'' (from the ...

, micro fuel spray injection and low-friction valve lifters.

Applications

Perodua Bezza The Perodua Bezza (codenamed D63D) is an A-segment Sedan (automobile), sedanhttps://paultan.org/2016/07/21/perodua-bezza-officially-launched/ produced by Malaysian automobile manufacturer Perodua. It was launched on 21 July 2016 as Perodua's fi ...

(2016–present) * Daihatsu Sigra (2016–present) *

(2017–present) * Toyota Agya/Wigo (2017–present)

1KR-VET

The 1KR-VET (996 cc) is a

turbocharged In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

version of the 1KR-FE with lowered compression ratio of 9.5:1 and redline of 6200 rpm. Produced by Daihatsu for use in the top-of-the-range version of the Daihatsu Thor and the A200/A250 series Rocky. It delivers and of torque.

Applications

* Daihatsu Thor/Toyota Tank/Toyota Roomy/Subaru Justy (2016–present) * Daihatsu Rocky/Toyota Raize (2019–present) *

Perodua Ativa The A200/A250 series is a car manufactured by Daihatsu. A subcompact crossover SUV, it was unveiled at the Tokyo Motor Show#2019, 46th Tokyo Motor Show on 23 October 2019 under the "New Compact SUV" name. It replaced the Daihatsu Be-go, Be‣g ...

(2021–present)

1KR-B52

Revised version used in PSA Citroën C1/Peugeot 108 since 2016. First appeared in Citroën C1 UrbanRide and Elle special editions and later rolled out to all. The engine was modified to meet the Euro 6.2 emission standard whilst boosting performance to and economy up to 58.8 mpg on combined WLTP cycle while keeping emissions at 110 g/km co2 on WLTP cycle.

Applications

* Citroën C1/Peugeot 108 (2016-2021) *

Toyota Aygo X The Toyota Aygo X is a crossover city car produced by Toyota since 2022. Using the Aygo nameplate, it is primarily marketed for the European market. It is built at the Toyota Motor Manufacturing Czech Republic (TMMCZ, formerly known as TPCA) ...

(2022–present)

References

{{DEFAULTSORT:Toyota Kr Engine KR Straight-three engines Gasoline engines by model

1KR-FE

Applications

1KR-DE

Applications

1KR-DE2

Applications

1KR-VE

Applications

1KR-VET

Applications

1KR-B52

Applications

See also

References