As with the oxygen sensor, the air-fuel ratio sensor detects the oxygen concentration in the exhaust gas. Conventional oxygen sensors are such that the output voltage tends to change drastically at the Read more Gasoline Engine Air-fuel (A/F) Ratio Sensor
Fuel
Outline of Electronic Fuel Injection and Idle Speed Control System
EFI (Electronic Fuel Injection)System
The EFI system uses various sensors to detect the operating conditions of the engine and the vehicle. In accordance with the signals from these sensors, the ECU calculates Read more Outline of Electronic Fuel Injection and Idle Speed Control System
TCV (Timing Control Valve) of Fuel Injection
The TCV renders the LST inactive if the vehicle is operated with a cold engine (coolant temperature below 6C (14F)) or at high altitudes (where the atmospheric pressure is below 93 kPa (70mmHg)). The purpose Read more TCV (Timing Control Valve) of Fuel Injection
LST (Load-Sensing Timer) of Fuel Injection
The LST changes the fuel injection timing in accordance with the engine load, and obtain the characteristic of advancing. The fuel is released from the orifice on the governor sleeve via the governor shaft Read more LST (Load-Sensing Timer) of Fuel Injection
Fuel Injection All-speed Governor
The all-speed governor controls the fuel injection volume at all engine speed ranges. The spill ring is moved by the governor, changing the effective stroke, resulting in an adjustment of the injection Read more Fuel Injection All-speed Governor
VE Pump Mechanical Governor (Fuel Injection)
It is necessary to control the fuel injection volume in accordance with the effort that the accelerator pedal is depressed and engine load as the output of the diesel engine is controlled by the fuel injection Read more VE Pump Mechanical Governor (Fuel Injection)
Diesel EnginePreheating System
1. Necessity of preheating system
At a cold engine starting, the compression heat escapes from the compression chamber even if there is adequate compression. In some cases, the injected fuel does not Read more Diesel EnginePreheating System
Fuel dribble (dripping) after injection
This occurs when the fuel supply is not precisely cutoff at the end of fuel injection and fuel particles are accumulated on the tip of the nozzle. If fuel dribble occurs after fuel injection, the fuel Read more Fuel dribble (dripping) after injection
Fuel System of Diesel Engine 2 of 2
2. Necessity of adjusting nozzle opening pressure
For the injection nozzle, the nozzle opening timing varies according to the nozzle needle opening pressure. If the injection nozzle does not open or Read more Fuel System of Diesel Engine 2 of 2
Fuel System of Diesel Engine 1 of 2
The fuel system delivers the fuel to the engine. The injection pump is driven by the timing belt or the timing gear of engine.
HINT:
The injection pump is driven by the camshaft in accordance with Read more Fuel System of Diesel Engine 1 of 2