The

Toyota is a Japanese Multinational corporation, multinational Automotive industry, automotive manufacturer headquartered in Toyota City, Aichi, Japan. It was founded by Kiichiro Toyoda and incorporated on August 28, 1937. Toyota is the List of manuf ...

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 engine, straight-three engines have nonethel ...

piston engine A reciprocating engine, more often known as a piston engine, is a heat engine that uses one or more Reciprocating motion, reciprocating pistons to convert high temperature and high pressure into a Circular motion, rotating motion. This article ...

, designed by

Daihatsu is a Japanese automobile manufacturer headquartered in Ikeda, Osaka Prefecture, Japan. One of the oldest surviving Japanese internal combustion engine manufacturers, the company was known for building three-wheeled vehicles and off-road vehicle ...

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

DOHC An overhead camshaft (OHC) engine is a piston engine in which 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 combus ...

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 a fuel injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All co ...

, 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 petrol engine technology manufactured by Toyota Group and used by brands Groupe PSA (Peugeot and Citroen), Toyota, Lexus, Scion, Daihatsu, Subar ...

variable valve timing. The engine is exceptionally light: with all ancillaries.

1KR-FE

The 1KR-FE is a version built in

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

and

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...

. Bore and stroke is , with a

compression ratio The compression ratio is the ratio between the maximum and minimum volume during the compression stage of the power cycle in a piston or Wankel engine. A fundamental specification for such engines, it can be measured in two different ways. Th ...

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 The International Engine of the Year was an annual competition for automotive industry internal combustion engines and electric motors, judged by a panel of automobile journalists from around the world. It is organised by UKi Media & Events' Autom ...

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 or Citroën C1/

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 ...

since 2014 in NEDC.

Applications

* Daihatsu Boon/Toyota Passo/Daihatsu Sirion/Subaru Justy * Toyota Aygo/ Citroën C1 (2005–2021) * Vitz/Yaris (XP90)/ Vitz/Yaris (XP130)/ Yaris (XP210) (2005–present) * Toyota Belta (2006–2012) * Toyota iQ (2008–2015) *

Daihatsu Cuore ''Cuore'', , the Italian-language word for "heart", may refer to: * CUORE Experiment The Cryogenic Underground Observatory for Rare Events (CUORE) – also ; ) – is a particle physics experiment located underground at the Laboratori Nazional ...

L276 (2007–2013) *

Peugeot 107 The Peugeot 107 is a city car produced by France, 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 T ...

(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 analogue of linear force. It is also referred to as the moment of force (also abbreviated to moment). The symbol for torque is typically \boldsymbol\tau, the lowercase Greek letter ''tau''. Wh ...

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 an 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 ref ...

is integrated to the cylinder head together with the

catalytic converter A catalytic converter part is an vehicle emissions control, exhaust emission control device which converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalysis, catalyzing a redox ...

and

oxygen sensor An oxygen sensor is an electronic component that detects the concentration of oxygen molecules in the air or a gas matrix such as in a combustion engine exhaust gas. For automotive applications, an oxygen sensor is referred to as a lambda senso ...

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 (2013–2023) * Toyota Agya/Wigo (2013–2017) * Daihatsu Hi-Max, 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 (), usually abbreviated to Perodua (), is Malaysia's largest car manufacturer, followed by Proton Holdings. Background and history Perodua was established in 1993 and launched its first 5-door hatchback, the Perodua Kancil, in August 1994 ...

. 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 that regulate pollution from the use of new land surface vehicles sold in the European Union and European Economic Area member states and the United Kingdom, and ships in Europea ...

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 (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 (or fuel economy) is a form of thermal efficiency, meaning the ratio of effort to result of a process that converts chemical energy, chemical potential energy contained in a carrier (fuel) into kinetic energy or Mechanical work, w ...

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

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

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

Applications

* Perodua Bezza (2016–present) * Daihatsu Sigra (2016–present) * Perodua Axia (B200) (2017–present) * Perodua Axia (A300) (2023–present) * Toyota Wigo (B100) (2017–2023) * Toyota Wigo (A350) (2023–present) * Toyota Agya (2017–2021) * Daihatsu Ayla (2023–present)

1KR-VET

The 1KR-VET (996 cc) is a

turbocharged In an internal combustion engine, a turbocharger (also known as a turbo or a turbosupercharger) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake air, forcing more air into the ...

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 (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/

(2016–2021) * Toyota Aygo X (2022–present)

References

{{DEFAULTSORT:Toyota Kr Engine KR Daihatsu engines Peugeot engines PSA engines 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