Hybrid vehicle two-kinetic-source engaging and disengaging system

Abstract

The invention relates to a hybrid vehicle two-kinetic-source engaging and disengaging system, which comprises an engaging and disengaging execution oil cylinder which is communicated with two kinetic sources, wherein the two kinetic sources comprise an engine steering booster oil pump and an electric steering oil pump, wherein both a hydraulic oil output port of the engine steering booster oil pump and a hydraulic oil output port of the electric steering oil pump are communicated with a hydraulic oil input port of the engaging and disengaging execution oil cylinder. The hybrid vehicle two-kinetic-source engaging and disengaging system adopting the above structure utilizes the electric steering oil pump when an engine does not work and utilizes the steering booster oil pump of the engine when the engine works, so the failure risk of an automatic engaging and disengaging hydraulic system can be reduced, the loss of the energy which is transformed between the engine mechanical energy and the electric steering boosting system mechanical energy can be reduced relative to the situation that only a single kinetic source of the electric steering oil pump is utilized, and the economic performance of the engaging and disengaging system can be improved. The hybrid vehicle two-kinetic-source engaging and disengaging system ahs a simple structure, low cost and a wide application range.

Description

Technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to the technical field of hybrid electric vehicle power transmission and separation control devices, and specifically refers to a hybrid electric vehicle dual-power source clutch system. Background technique [0002] Among the existing clutch systems of hybrid buses, some adopt manual clutch systems (that is, traditional clutch control methods: purely mechanical power clutch, clutch with pneumatic or hydraulic assist system), and some adopt their own power source and control The independent automatic clutch system (working with the automatic shift system) of the engine, and some electromagnetic clutch systems, these clutch systems have their own advantages and suitable fields. [0003] The above-mentioned clutch system is mainly applied to light-duty hybrid and medium-duty hybrid vehicles, or pure electric vehicles, whose engines (or electric power-assisted clutch systems)...

AI Technical Summary

Problems solved by technology

For the working strategy of the power and energy system of the plug-in heavy-duty hybrid vehicle, the above-mentioned clutch system has the following disadvantages: 1. The plug-in heavy-duty hybrid vehicle has two main power sources (engine, drive motor ), the two can work at different times, which means that the original clutch assist system that relies on engine power cannot be used after the engine is stopped. If the normal electric assist clutch system is used, the power of the original clutch assist system will (In the prior art, the clutch booster oil pump of the engine has been removed in some schemes); 2. For the traditional clutch system, the half-clutch state is controlled by the driver by feeling when the vehicle starts, while the general hybrid Power vehicles (or pure electric buses) are designed to drive the motor to start, and generally do not use the engine to start the vehicle directly, so there is no half-clutch function in its automatic clutch system

3. Generally, the steering assist system and the clutch assist system of hybrid electric vehicles or pure electric vehicles are separated, and each has its own power source, which causes waste of system cost and reduction of system efficiency to a certain extent

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