Search Results

The medium duty commercial vehicle “ISUZU FORWARD” powered by the newly designed 6HE1 six cylinder engine was placed on Japanese market in April 1990. At the same time the engine family of the four cylinder version 4HF1 engine mounted in the light duty commercial vehicle “ISUZU ELF” was introduced in Japanese market in August 1990. These H-series engines are successors to the B-series engines, which have been used worldwide for vehicles, industrial machinery and boats. The basic structure of OHC and ladder frame of these engines made it possible to improve the design of the inlet and exhaust ports and valves, and improve the stiffness of the cylinder block and the cylinder head. In turn this provides higher performance, durability and reliability. This paper describes the special features and construction of these new H-series engines, together with newly adopted technology.

Isuzu Motors Limited has recently-developed 2.5 liter and 2.8 liter diesel engines to power Isuzu “ELF” trucks (payload 1-2 tons). These two engines are high fuel economy direct injection diesels featuring a square cavity combustion chamber and Bosch VE distributor type injection pump. To reduce the D.I. diesel engine noises, the combustion chamber, fuel injection system, and cylinder block construction have been improved. In addition, a vibration damping sheet oil pan, timing belt drive, and cylinder block, cover are employed. The two diesel engines are small size, light weight, highly reliable engines to be successors to the 2.0, 2.2 and 2.4 liter Isuzu “C”-series diesel engines. To date, 2 million of these engines have been produced to power the Isuzu “ELF” trucks and other vehicles as well as a wide variety of industrial and marine applications.