Automatic Transmission Oil Pump for Cooling

With the development of automotive energy saving technology and hybrid technology, the requirements for the working efficiency, control accuracy, and energy consumption level of the oil pump in the gearbox have continuously improved. The Transmission Oil Pump has developed from a traditional mechanical oil pump to a dual pump system, and an electric oil pump.

Critical parameters:

Working principle of transmission auxiliary oil pump:

The automatic transmission oil pump is usually installed behind the hydraulic torque converter and is driven by a shaft sleeve at the rear of the hydraulic torque converter housing. In the oil supply system of an automatic transmission, there are two types of oil: a fixed star pump and a variable star pump.

Quantitative oil pump

The commonly used centering pumps include internal gear pumps, rotor pumps, vane pumps, etc. Currently, the most widely used is still internal gear pumps. The internal Gear Pump is composed of an external gear, an internal gear, a crescent shaped baffle, a pump housing, a pump cover, etc. The gear is tightly installed in the inner cavity of the pump body. The outer gear is a driving gear, and the inner gear is a driven gear. The liver shaped baffle separates the outer gear from the inner gear.

Variable oil pump

When the engine speed exceeds a certain value, the amount of fuel pumped by the variable displacement pump will not increase, which will shorten the rotational resistance of the pump at high speeds and improve the fuel rationality of the vehicle.