Isuzu 4 HK1-TC Common Rail Engine with EGR system

The new engine of Turquoise bus, Isuzu 4 HK1-TC, is an inline 4 cylinder direct injected diesel engine with a displacement of 5.2 litres. Like the previous 4HE1-TC model, the engine is fitted with a turbo charger and an intercooler in order to boost the engine performance and torque, and it features a cast-iron cylinder block with dry sleeve cylinder liners and a ladder type crankcase. However in addition to the previous model, 4 HK1-TC includes the employment of four valve mechanism per cylinder that are operated via a single camshaft, Common Rail fuel injection system, water cooled exhaust gas re-circulation (EGR) system, and the change of combustion chamber form. The larger engine displacement and the common rail fuel injection system have resulted in an increase both in maximum output (175 HP) and torque (500 Nm) while meeting Euro 3 emission level.