Hybrid power automobile power system and control method thereof

Abstract

The hybrid power system for cars comprises the engine, motor, main clutch, gear box, drive shaft and power system control unit, with the crank case, shaft of the motor, main clutch shaft and input shaft of the gear box connected with the axial line in sequence, electromagnetic clutch between the engine and the motor, with its shaft connecting with the engine and motor coaxially. It can transit smoothly through operation of two clutches, avoiding impact, reduce oil consumption and emission.

Description

technical field [0001] The invention belongs to the technical field of automobile structure, and relates to a power system of an automobile, more specifically, the invention relates to a power system of a hybrid electric vehicle. The invention also relates to the control method of the power system of the hybrid electric vehicle. Background technique [0002] At present, the power system of hybrid electric vehicles that has been publicly used has the following technical solutions: [0003] The electric device of a hybrid vehicle with a pure electric drive mode often uses two motors and two sets of motor control systems because it needs to realize many functions such as power generation, driving, and starting the engine, one of which is responsible for driving, and the other is responsible for starting and generating electricity. Each motor adopts a high-voltage system, which undoubtedly increases the cost and makes the system complex. [0004] As for the hybrid electric veh...

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Problems solved by technology

[0003] The electric device of a hybrid vehicle with a pure electric drive mode often uses two motors and two sets of motor control systems because it needs to realize many functions such as power generation, driving, and starting the engine, one of which is responsible for driving, and the other is responsible for starting and generating electricity. Each motor adopts a high-voltage system, which undoubtedly increases the cost and makes the system complex

[0004] As for the hybrid electric vehicle (ISG) that integrates the motor between the engine and the gearbox, and is coaxial with the crankshaft and the gearbox input shaft, although the structure is compact and the system is simple, the ISG hybrid electric vehicle has no pure electric mode and uses a similar planetary The disadvantages of complex structure and high cost of hybrid electric vehicles with wheel structure; but none of them adopt pure electric drive mode

This is because when transitioning from pure electric mode to pure internal combustion engine mode or other modes, the motor is responsible for driving while starting the engine, which will cause impact on the system and affect driving comfort

[0005] Chinese Patent No. CN1637327 discloses a double-clutch transmission device for a hybrid electric vehicle and a method for operating the device, but this patent mainly involves the gearbox structure and does not solve the above-mentioned problems

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