Transmission hydraulic system, control method and vehicle

Abstract

The invention provides a transmission hydraulic system, a control method and a vehicle. The control method comprises the steps of obtaining the requirement of total pressure for the flow and the requirement of total cooling lubricating for the flow in the hydraulic system; judging whether the requirement of total pressure for the flow is larger than zero or not; if yes, controlling an electronic pressure to supply oil to a pressure loop, and if not, controlling the electronic pump to supply oil to the lubricating loop; when the electronic pump supplies oil to the lubricating loop, according tothe clutch cooling lubricating needs, determining the flow, and according to a correction coefficient, correcting the flow. The method has the beneficial effects of being low in energy consumption and high in fuel economy, safety and reliability are achieved, and the vehicle taking comfort is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a transmission hydraulic system, a control method and a vehicle. Background technique [0002] At present, there are three situations in automatic transmissions: (1) Most of them do not have electronic pumps, but only mechanical pumps. In order to meet the pressure and flow requirements of the hydraulic system, the designed mechanical pump has a relatively large displacement, a relatively large energy waste, and low efficiency; (2) There are only electronic pumps but no mechanical pumps. Only small pressure and small flow requirements can be provided to the hydraulic system, and some extreme conditions lead to insufficient pressure or insufficient flow. (3) In most automatic transmissions, the simple control is realized through transmission oil temperature and sliding friction power, which lacks control precision. Contents of the invention [0003] In view of this, the pr...

AI Technical Summary

Problems solved by technology

In order to meet the pressure and flow requirements of the hydraulic system, the designed mechanical pump has a relatively large displacement, relatively large energy waste, and low efficiency; (2) only electronic pumps without mechanical pumps

It can only provide small pressure and small flow requirements for the hydraulic system, and some extreme conditions lead to insufficient pressure or insufficient flow

(3) In most automatic transmissions, simple control is achieved through transmission oil temperature and sliding friction power, lacking control precision

Images