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)
Automotive Engine
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
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
Computer Control of Gasoline Engine
A gasoline engine produces power through the explosion of a mixture of gasoline and air. The three essential elements for a gasoline engine to produce power are the following
1. Good air-fuel mixture
2. Read more Computer Control of Gasoline Engine
Diesel Engine BACS (Boost and Altitude Compensator System)
1. Description
The BACS is a device that provides both the functions of the turbocharger boost compensator and the HAC. The HAC valve maintains the constant pressure in the constant pressure chamber located Read more Diesel Engine BACS (Boost and Altitude Compensator System)
Turbocharger Boost Compensator
1. Description When the intake air volume (boost pressure) is increased by the turbocharger, the boost compensator increases the maximum fuel injection volume in accordance with the increased intake air Read more Turbocharger Boost Compensator
Diesel Engine High-Altitude Compensator (HAC)
1. Description
At high altitudes, the air density decreases with the decrease in the atmospheric pressure. For this reason, if the fuel is injected under the same conditions as at low altitudes, the air-fuel Read more Diesel Engine High-Altitude Compensator (HAC)