The Daihatsu K-series is a series of three unrelated engine families (KF, KR and K3/KJ), even though named with same initial "K" letter code. These engines were built in
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 ...
12-valve inline three (KF & KR) and DOHC 16-valve
inline four (K3/KJ)
engine layout, ranging from 0.66 L, 1.0 L and up to 1.3 L. All engine families are available in
naturally aspirated
A naturally aspirated engine, also known as a normally aspirated engine, and abbreviated to N/A or NA, is an internal combustion engine in which air intake depends solely on atmospheric pressure and does not have forced induction through a turboc ...
and
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 ...
form. The new KF weighs 47kg (103lbs) which is 25% less than the old EF which weighs 59kg (130lbs)
KF
Introduced in November 2005, Daihatsu KF engine is a series of 658 cc
inline-three cylinder 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 ...
12 valve
water-cooled
Cooling tower and water discharge of a nuclear power plant
Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water is inexpensive and no ...
engine, designed for
kei cars
Kei car is the smallest category of Japanese expressway-legal motor vehicles. The term ''kei'' is a shortening of , (kanji: ), which translates to English as "light vehicle" ().
With restricted dimensions and engine specifications, owners e ...
. This engine replacing the old
EF series engine.
K3
The Daihatsu K3 engine is a series of 1.3 L
4-cylinder
The engine configuration describes the fundamental operating principles by which internal combustion engines are categorized.
Piston engines are often categorized by their cylinder layout, valves and camshafts. Wankel engine, Wankel engines are o ...
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 ...
16-valve,
water-cooled
Cooling tower and water discharge of a nuclear power plant
Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water is inexpensive and no ...
gasoline
Gasoline ( North American English) or petrol ( Commonwealth English) is a petrochemical product characterized as a transparent, yellowish, and flammable liquid normally used as a fuel for spark-ignited internal combustion engines. When for ...
engine developed and produced by Daihatsu since April 2000, replacing
Daihatsu HC engine. This engine also known as
Toyota 2SZ-FE engine. The stroked up version of this engine is called 3SZ-VE engine (1.5 L) and stroked down version is called KJ-VET engine (1.0 L).
KJ
The Daihatsu KJ-VET engine 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 ...
1.0 L
4-cylinder
The engine configuration describes the fundamental operating principles by which internal combustion engines are categorized.
Piston engines are often categorized by their cylinder layout, valves and camshafts. Wankel engine, Wankel engines are o ...
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 ...
16-valve,
water-cooled
Cooling tower and water discharge of a nuclear power plant
Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water is inexpensive and no ...
gasoline
Gasoline ( North American English) or petrol ( Commonwealth English) is a petrochemical product characterized as a transparent, yellowish, and flammable liquid normally used as a fuel for spark-ignited internal combustion engines. When for ...
engine developed and produced by Daihatsu. This short lived engine only available for
Daihatsu Boon
The is a subcompact car produced by Japanese automaker Daihatsu since 2004, and also sold under Toyota brand as the between 2004 and the ends of 2023. The Passo was once sold at ''Toyota Corolla Store'' Japanese dealerships until it was conso ...
X4. This engine is a stroked down version of K3-VET engine.
KR
A 1.0 L
inline 3-cylinder engine series designed and produced 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 ...
.
References
{{Daihatsu
Daihatsu engines