To maximum the exhaust purification function of the engine with TWC (Three-Way Catalytic Converter), the air-fuel ratio must be kept within a narrow range around the theoretical air-fuel ratio. The oxygen Read more Gasoline Engine Oxygen Sensor (O2 Sensor)
Gasoline Engine Water Temperature Sensor/ Intake Air Temperature Sensor
The water temperature sensor and intake air temperature sensor have builtin thermistors for which the lower the temperature, the larger the resistance value and, conversely, the higher the temperature, Read more Gasoline Engine Water Temperature Sensor/ Intake Air Temperature Sensor
What is G and NE Signal Generators?
The G signal and NE signal are generated by the pickup coil, in which the camshaft position sensor or crankshaft position sensor, and the signal plate or the timing rotor. The information from these two Read more What is G and NE Signal Generators?
Gasoline Engine Accelerator Pedal Position Sensor
The accelerator pedal position sensor converts the amount that the accelerator pedal is depressed (angle) to an electrical signal that is sent to the engine ECU. In addition, to ensure reliability, this Read more Gasoline Engine Accelerator Pedal Position Sensor
Throttle Position Sensor
The throttle position sensor is installed on the throttle body. The sensor converts the throttle opening angle to voltage, which is sent to the engine ECU as the throttle opening signal (VTA). In addition, Read more Throttle Position Sensor
Manifold Pressure Sensor (Vacuum Sensor)
The manifold pressure sensor is used with D-type EFI for sensing the intake manifold pressure. This is one of the most important sensors in D-type EFI. By means of an IC built into this sensor, the manifold Read more Manifold Pressure Sensor (Vacuum Sensor)
Diesel Engine Air Flow Meter
In this system, the temperature of the hot-wire (Rh) is continuously maintained at a constant temperature higher than the temperature of the intake air by using the thermistor (Ra). Consequently, since Read more Diesel Engine Air Flow Meter
Gasoline Engine Air Flow Meter
The air flow meter is one of the most important sensors because it is used in L-type EFI to detect the intake air mass or volume. Signal of the intake air mass or volume is used to calculate the basic Read more Gasoline Engine Air Flow Meter
What is a Sensor Terminal Voltage?
The sensors convert various information into voltage change that can be detected by the engine ECU. There are many types of sensor signals, but there are five main types of methods for converting the information Read more What is a Sensor Terminal Voltage?
Gasoline Engine Electronic Control System
The engine control system consists of three groups including sensors (and sensor output signals), engine ECU, and actuators. This chapter explains the sensors (signals), power circuitry and ground circuitry, Read more Gasoline Engine Electronic Control System