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Automatic Transmission Oil Pump with Internal Gearing

Automatic Transmission Oil Pump with Internal Gearing

The Transmission Oil Pump is the heart of the transmission oil. When the transmission oil circulates to the bottom, it can pressurize the oil from the bottom through the filter screen to the top. The following is the role of the engine oil pump:

Gearbox Oil Pump for Lubrication LEXUS

Gearbox Oil Pump for Lubrication LEXUS

DARE AUTO is a worldwide known Transmission Oil Pump manufacturer in China, mainly supplying automotive and transmission OEMs globally. DARE AUTO is able to design the pump and software according to Customer’s technical specifications. With a robust global engineering team, DARE AUTO is able to provide customized solution.

Automatic Transmission Auxiliary Oil Pump

Automatic Transmission Auxiliary Oil Pump

The function of the oil pump of the transmission is to provide hydraulic pressure to operate the control valve and clutch, provide a quantitative supply of gear oil in the transmission and differential boxes, and send the transmission oil to the cooler for circulation and heat dissipation. The following is a partial introduction to the oil pump:

Automatic Transmission Oil Pump for Cooling

Automatic Transmission Oil Pump for Cooling

With the development of automotive energy-saving technology and hybrid power technology, the requirements for the working efficiency, control accuracy, and energy consumption level of the oil pump in the transmission have been continuously increasing. The transmission oil pump has evolved from traditional mechanical oil pumps to dual-pump systems and electric oil pumps.

Transmission Oil Pump for Gear Shifting

Transmission Oil Pump for Gear Shifting

The Lubrication Oil Pump is the power source of the entire hydraulic system of an automatic transmission, and is generally directly driven by the engine. All automatic transmissions have a front pump driven by the engine, and some transmissions also have a rear pump driven by the output shaft. The functions of these two pumps are to provide a certain flow and pressure of hydraulic oil required by the transmission. The specific functions are as follows:

Dual Oil Pump for DHT Transmission

Dual Oil Pump for DHT Transmission

The design requirements for automotive automatic transmission oil pumps are: to meet the pressure and flow requirements, the volume should be as small as possible, the energy consumption should be as low as possible, the noise should be as small as possible, and the reliability should be as high as possible.

Hydraulic Oil Pump for Transmission

Hydraulic Oil Pump for Transmission

The automatic transmission oil pump, also known as the gear pump, plays a very important role in the automatic transmission and is one of the most important assemblies of the automatic transmission.

Hydraulic Transmission Oil Vane Pump CVT

Hydraulic Transmission Oil Vane Pump CVT

In the early stages of the development of automatic transmissions, dual pumps were used in automatic transmissions. They were used to transfer the front and rear of the transmission, with the front pump driven by the engine and the rear pump driven by the output shaft. The function of the rear pump is to maintain the lubricating oil pressure of the system or ensure that the vehicle can be started by pushing the cart when the front pump cannot drive and supply oil when the engine fails. However, with the development of the automotive industry, the volume of the engine compartment is becoming smaller and smaller, while the engine is becoming larger and larger, which requires that the gearbox be as small as possible. Therefore, the automatic transmission gradually eliminated the rear pump. In the 1940s and 1980s, internal meshing involute quantitative gear pumps with crescent shaped partitions were generally used; In the 1980s, rotor pumps and variable vane pumps were introduced; In the 1990s, quantitative pumps with different tooth shapes were introduced, including internal meshing cycloidal pumps and dual center internal meshing pumps.

Mechanical Oil Pump for DHT Transmission

Mechanical Oil Pump for DHT Transmission

As the capacity and voltage of the on-board battery gradually increase, the degree of electrification of the Transmission Oil Pump will further deepen, especially in plug-in hybrid vehicles. As the engine only intervenes when necessary, most of the time it is driven by pure electricity, and at this time, the Lubrication Oil Pump takes on the main work, so the mechanical oil pump can be eliminated and completely adopted.

Automatic Transmission Oil Pump with Gear Driving

Automatic Transmission Oil Pump with Gear Driving

Automatic transmissions, especially those with electrohydraulic control as the main means, are controlled by the hydraulic system during their operation. As an important component of the hydraulic system, the oil pump is the heart of the hydraulic system, providing a continuous stream of power for the hydraulic system, providing hydraulic oil for components such as hydraulic torque converters, hydraulic actuators, control valves, and also providing lubrication and cooling oil for components such as clutches and gears.

Transmission Oil Pump for DCT

Transmission Oil Pump for DCT

Automatic transmission, especially the transmission with electro-hydraulic control, all actions are mainly realized through the control of the hydraulic system.

Lubrication Oil Pump for Transmission CHERY

Lubrication Oil Pump for Transmission CHERY

Currently, most traditional automatic transmissions use mechanical oil pumps, such as the Volkswagen DQ380 transmission. The power of the mechanical oil pump comes from the engine. As long as the engine is running, the automatic Transmission Oil Pump is in operation and outputs pressure oil.

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Contact Person:Mr.  WANG
Telephone:+86-418-3399321
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E-mail：wangyong@dare-auto.com
Address: No. 55, E road, Economic Development Zone, Fuxin, Liaoning

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