6E–70
4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
GENERAL DESCRIPTION FOR INJECTION PUMP
Cross-section View
Outline
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Drive Shaft Feed Pump Pump Camshaft Speed Sensor Pump Control Unit (PSG) Distributor Head Constant Pressure Valve (CPV) Holder High Pressure Solenoid Valve Constant Pressure Valve (CPV) Timing Control Valve (TCV) Timer Radial Plunger High Pressure Pump
Instead of the previous face cam type, the radial plunger distributor type injection pump utilizes a cam ring to enable fuel injection at high-pressures, marking it suitable for small, high-speed direct injection diesel engines. This pump was developed to provide the most suitable fuel injection quantity and injection timing to satisfy the demand for engine reliability, driveability, low smoke, low noise, high output and clear exhaust emissions.
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)
Drive Shaft Feed Pump Pump Camshaft Speed Sensor Pump Control Unit (PSG) Distributor Head Constant Pressure Valve (CPV) Holder High Pressure Solenoid Valve Constant Pressure Valve (CPV) Timing Control Valve (TCV) Timer Radial Plunger High Pressure Pump