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
Engine
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 Fuel Filter/Fuel Pump Filter
1. Fuel filter
The fuel filter removes dirt and impurities from the fuel that is compressed by the fuel pump.
2. Fuel pump filter
The fuel pump filter removes dirt and impurities from the fuel before Read more Gasoline Engine Fuel Filter/Fuel Pump Filter
Gasoline Engine Fuel System/ Fuel Pump and Pressure regulator
The fuel is taken from the fuel tank by the fuel pump and sprayed under pressure by an injector. The fuel pressure in the fuel line must be regulated to maintain stable fuel injection by the pressure regulator Read more Gasoline Engine Fuel System/ Fuel Pump and Pressure regulator
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
Gasoline Engine Communication Signals 2 of 2
1. Stop lamp switch
The signal from the stop lamp switch is used to detect brake operation. The STP signal voltage is the same as the voltage supplied to the stop lamp as shown in the illustration.
Gasoline Engine Communication Signals 1 0f 2
The communication signals are sent among different ECUs and are used to make operational adjustments for each other.
1. TRC (Traction Control) system communication signal
The throttle opening (VTA1 and Read more Gasoline Engine Communication Signals 1 0f 2
Gasoline EngineKnock Sensor andSTA (Starter) signal
The knock sensor is attached to the cylinder block, and sends a KNK signal to the engine ECU when engine knocking is detected. The engine ECU receives the KNK signal and retards the ignition timing to Read more Gasoline EngineKnock Sensor andSTA (Starter) signal
Diesel Engine Vehicle Speed Sensor
Click on the bulb mark or the underlined sentence.
The speed sensor detects the actual speed at which the vehicle is running. The sensor outputs the SPD signal, and the engine ECU uses this signal mainly Read more Diesel Engine Vehicle Speed Sensor
Gasoline Engine Air-fuel (A/F) Ratio Sensor
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