Conventional EFI-diesel
Common-rail EFI-diesel
4. Comparison of the target injection timing and the actual injection timing
As with the convention EFI-diesel, the basic injection timing of the Read more Determining Injection Timing Reference
injection
Determining Injection Timing
The ECU performs the following functions to determine the injection timing:
Conventional EFI-diesel
1. Determination of the target injection timing
2. Detection of the actual injection timing
Determining Injection Volume
The ECU performs the following three functions to determine the injection volume:
1. Calculation of basic injection volume
2. Calculation of maximum injection volume
3. Comparison of basic injection Read more Determining Injection Volume
Various Corrections in Gasoline Engine Injection Control System 2 of 2
4. Acceleration enrichment
The air-fuel ratio becomes lean, especially during the start of acceleration because a fuel supply lag tends to occur during acceleration against the rapid change of the amount Read more Various Corrections in Gasoline Engine Injection Control System 2 of 2
Various Corrections in Gasoline Engine Injection Control System 1 of 2
1. Start enrichment
The basic injection duration cannot be calculated from the amount of the intake air because the engine speed is low and the changes in the amount of the intake air are large at starting. Read more Various Corrections in Gasoline Engine Injection Control System 1 of 2
Gasoline Engine Fuel Injection Duration Control
The engine ECU changes the fuel injection volume by changing the injector injection duration. The actual fuel injection duration is determined by the following two items.
1. The basic injection duration Read more Gasoline Engine Fuel Injection Duration Control
Gasoline Engine EFI (Electronic Fuel Injection) Fuel System
The EFI system uses various sensors to detect the engine condition and vehicle running condition. And the engine ECU calculates at the optimum fuel injection volume, and causes the injectors to inject Read more Gasoline Engine EFI (Electronic Fuel Injection) Fuel System
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