Electronic limited-slip differential and control method thereof

Abstract

The invention discloses an electronic limited-slip differential and a control method thereof. A detection mechanism is used for collecting rotation speed information, accelerator pedal opening information, steering wheel corner information, lateral acceleration information and yaw velocity information and sending all the information to an electronic control unit; a work mode selection unit is used for selecting different work modes of the electronic limited-slip differential by a driver; and an electronic control unit is used for controlling an electromagnetic clutch, an auxiliary motor and a brake of an execution mechanism to work according to the received information and limiting the slip rates of driving wheels, thereby realizing electronic limited-slip differential velocity of the driving wheels on two sides. When the slip rate of the driving wheel on one side exceeds a set value, the auxiliary motor connected with a half-shaft of the drive axle works as a generator to apply a resistance moment to the half-shaft, so that the slip rate of the wheel is reduced, and a driving moment of the generator effectively acts on the wheel on the other side; and the brake is matched with the auxiliary motor to work in necessity, so as to apply a certain bake force to the wheels.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and specifically relates to an electronic limited-slip differential device and a control method thereof. Background technique [0002] Turning the car or driving on an uneven road will cause the wheels on both sides to move over different distances. In addition, the manufacturing size error of the tires, the degree of wear, the load bearing or the inflation pressure will also cause the actual rolling radius of each wheel to be unequal. The driving wheels on both sides are rigidly connected, and the speed of the wheels on both sides is equal, so the wheels will inevitably slide relative to the road surface, which will not only accelerate the wear of the tires, increase the power consumption of the car, but may also lead to deterioration of the steering and braking performance of the car. The function of the differential is to make the left and right driving wheels roll at different angular vel...

AI Technical Summary

Problems solved by technology

However, the electronic differential lock requires a larger brake disc to ensure the braking performance of the vehicle, and the frequent braking of the electronic differential lock is also likely to cause the phenomenon of brake heat degradation, which affects the safety of the vehicle. The realized limited slip differential will affect the dynamic performance of the vehicle to a certain extent

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