Hybrid four-wheel drive system for improving riding comforts and control method thereof

Abstract

The invention aims to provide a hybrid four-wheel drive system for improving riding comforts and a control method thereof. The hybrid four-wheel drive system comprises an engine, front wheels, a motor and rear wheels, the front wheels are mechanically connected with the engine through a speed changer, the rear wheels are mechanically connected with the motor through a speed reducer, a power supply of the motor is electrically connected with a low-voltage battery unit through an inverter, the motor is connected with a motor controller, the motor controller is connected with a riding comfort controller, and the riding comfort controller is respectively connected with the inverter, the low-voltage battery unit, a vehicle speed sensor, an engine rotating speed sensor, wheel speed sensors of all wheels, an accelerator pedal sensor, a braking pedal sensor and an engine control unit. According to the hybrid four-wheel drive system for improving riding comforts and the control method thereof, when the engine or a vehicle is in a poor working condition, the auxiliary drive by the rear wheels can be performed, so that the engine can work in the best fuel oil range, the vehicle can be assisted on stable operation, during braking, the motor of the rear wheels can be used for charging batteries, energy recovery can be achieved, and the comforts are improved.

Description

technical field [0001] The invention relates to a hybrid four-wheel drive system and a control method for improving driving comfort, which are used to start the auxiliary power system in good time when the engine or the vehicle is in a bad working condition, so as to control the engine to work in the optimal fuel consumption range . Background technique [0002] With the rise of oil prices and the concept of energy saving and environmental protection gradually becoming popular among the people, cars with small displacement engines are gradually accepted and loved by the public with relatively low operating and maintenance costs. However, small-displacement engines generally have the problem of poor low-speed torque, low effective output power of the engine at low speeds, and the power consumed by high-power loads such as air-conditioning compressors accounts for a large proportion of effective output power. In the process of using a car with a large engine, especially when...

AI Technical Summary

Problems solved by technology

However, small-displacement engines generally have the problem of poor low-speed torque, low effective output power of the engine at low speeds, and the power consumed by high-power loads such as air-conditioning compressors accounts for a large proportion of effective output power. In the process of using a car with a large engine, especially when there is a large load of equipment turned on and the engine is at a low speed, the output power of the engine is low, which leads to poor acceleration performance of the vehicle, which has become a problem that affects the driving experience of a car with a small displacement engine. Further reduce the bottleneck of fuel consumption

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