Automotive Sensor Base Lost Wax Castings

Product Introduction

The function of the airflow sensor is to convert the amount of air sucked into the engine into an electrical signal and provide it to the electronic control unit (ECU), which is the main basis for determining the basic fuel injection quantity.

• Vaned

The vane-type air flow sensor belongs to the volume flow type. The sensor has a simple structure and low cost, but because its moving piece vane occupies a large area of the intake duct, the fluidity of the intake system is reduced and the intake resistance is increased. , so it is less used now.

• Karman Swirl

The Karman vortex air flow sensor belongs to the volume flow type and is widely used in Toyota and Mitsubishi vehicles. The sensor has the characteristics of small size, lightweight, no wear, simple air intake, small air intake resistance, high detection accuracy, fast response, etc., but the cost is high, and it is mostly used in high-end cars.

• Hotline

The hot-wire air flow sensor belongs to the mass flow type, which can directly detect the mass flow rate of the intake air, and does not need to correct the intake air temperature and atmospheric pressure. Since the sensor has no moving parts, the air intake resistance is small, and the response characteristics are good, it can correctly detect the air intake volume during rapid deceleration, so it is widely used.

• Hot film

The hot-film air flow sensor belongs to the mass flow type, developed by General Motors of the United States, and widely used in vehicles produced by General Motors and Isuzu of Japan. The working principle of this sensor is basically the same as that of the hot wire sensor, except that the hot wire of the heating element is changed to a hot film (consisting of a heating metal platinum fixed on a thin resin film). This structure can prevent the heating element from directly bearing the resistance generated by the airflow, thereby increasing the strength and improving the reliability during operation.

Engine temperature sensor

The function of the engine temperature sensor (Automotive Sensor Base Lost Wax Castings) is to convert the temperature change of the gas or liquid into an electrical signal and provide it to the ECU.

Water temperature sensor:

Installed on the cylinder block, it is used to detect the temperature information of the engine cooling water, and convert the information into electrical signals, and provide them to the engine electronic control unit (ECU).

Intake air temperature sensor:

The engine intake air temperature sensor is installed on the airflow sensor in the L-type EFI system, while in the D-type EFI system, it is installed in the housing of the air filter or in the pressure tank to provide the engine electronic control unit (ECU). Information on engine intake air temperature.

Fuel temperature sensor:

It is used in diesel engine electronic control distribution pump fuel injection system to provide fuel temperature information to the engine electronic control unit (ECU) so as to realize precise control of fuel injection quantity.

Detection Systems

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