Hybrid power automobile gearbox unit cooling system and cooling method

Abstract

The invention provides a hybrid power automobile gearbox unit cooling system and cooling method. An oil incoming pipe, an oil discharging pipe and a returning pipe communicating the oil incoming pipe and the oil discharging pipe are arranged in an oil cooling temperature control valve unit, the oil temperature sensing information of a gearbox unit is combined, and valves of oil pipes are controlled to open and close dynamically; on the idling condition, oil from the gearbox unit flows back to the gearbox from the oil cooling temperature control valve unit directly, time for the oil flowing back the gearbox is shortened, oil pressure can be established rapidly, and the gearbox and a coupled mechanism thereof operate at the proper temperature rapidly; when an engine operates in high speed and the gearbox is under high load, oil friction heat is increased sharply, oil of the gearbox flows to an oil cooler completely through the oil cooling temperature control valve, waste heat is radiated through the oil cooler, and the coil flows back to the gearbox unit, so that the accurate control of the oil temperature of the gearbox is implemented, friction loss, oil consumption and discharging are reduced, service life of the gearbox unit is prolonged, and shift quality is guaranteed.

Description

technical field [0001] The invention relates to a cooling technology of a gearbox, in particular to a cooling system and a cooling method of a gearbox unit of a hybrid electric vehicle. Background technique [0002] At present, the traditional automotive gearbox cooling technology mostly adopts single air cooling or water cooling, which is easy to over-cool the oil temperature under idling conditions, causing the oil temperature to fail to reach the appropriate temperature of the gearbox quickly, resulting in additional loss of power, and at the same time The existing gearbox single cooling technology cannot achieve precise cooling control, and cannot accurately control cooling under high torque conditions, resulting in defects such as low efficiency of the gearbox and its coupling mechanism, and insufficient performance improvement. For the cooling technology of hybrid vehicle transmission, the single cooling method of traditional transmission is generally used, which canno...

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional automotive gearbox cooling technology mostly adopts single air cooling or water cooling, which is easy to over-cool the oil temperature under idling conditions, causing the oil temperature to fail to reach the appropriate temperature of the gearbox quickly, resulting in additional loss of power, and at the same time Existing gearbox single cooling technology cannot achieve precise cooling control, and cannot accurately control cooling under high-torque co...

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