A kind of dct transmission double pump system, control method and automobile

Abstract

The invention relates to a dual-pump system of a DCT transmission, a control method and an automobile to solve the problem of large energy consumption loss caused by one mechanical oil pump in the prior art. The DCT transmission dual-pump system includes: a controller; a drive motor connected to the controller; a high-pressure oil pump driven forward by the drive motor and a low-pressure oil pump driven reversely by the drive motor; a high-pressure control oil circuit supplied by the high-pressure oil pump and The accumulator is connected to the controller; the low-pressure lubricating oil circuit supplied by the low-pressure oil pump; the controller is used to control the drive motor to rotate forward when the current operating condition of the DCT transmission is determined to be the gear switching condition. Make the high-pressure oil pump supply oil to the high-pressure control oil circuit and the accumulator; and when it is determined that the current operating condition of the DCT transmission is a driving condition with gears, control the reverse rotation of the drive motor so that the low-pressure oil pump supplies oil to the low-pressure lubricating oil circuit supply oil, and control the accumulator to supply oil to the high-pressure control oil circuit.

Description

technical field

[0001] The invention relates to the field of transmission technical control, in particular to a DCT transmission double pump system, a control method and an automobile. Background technique

[0002] In the development of automobiles, the needs of users have always been the most powerful driving force for the continuous progress of automobile technology. With the development of the current society, users have further increased requirements for vehicle power, fuel economy, safety and comfort, thus putting forward higher requirements for the performance of various parts and assemblies of vehicles including transmissions. As one of the main energy consumption sources of the transmission, the hydraulic system of the DCT transmission has always been the focus of attention in the design and development of the transmission. But the problem is that the DCT transmission generally provides oil consumption for the hydraulic system through a mechanical oil pump. In order...

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