Drive bridge of integrated hydraulic auxiliary air brake device and control method thereof

Abstract

The invention discloses a drive bridge of an integrated hydraulic auxiliary air brake device and a control method thereof. The drive bridge of the integrated hydraulic auxiliary air brake device comprises an original car driving system, a level variable hydraulic auxiliary brake system and a drive bridge integrating distribution power, differential speed, drive wheels and other functions. The integrated drive bridge can make up the shortages in traditional hybrid power scheme that the drive system has a large installation space, the car chassis is heavy, the power transmission line is long; the level variable system based on dual-mode working characteristics is adopted to replace traditional hybrid power variable system, it solves the problems that traditional hybrid power core componentsare expensive and less reliable; the working state of the systems are judged according to sensor signals collected by a controller, then the needed displacement of the hydraulic pump / motor is calculated by a program, through a series of control algorithms, the closest displacement combination scheme is selected, and through the controller to control the control valve group, the control of the working state of the hydraulic pump / motor is realized.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a drive axle integrating a hydraulic auxiliary air brake device and a control method thereof. Background technique [0002] As the world's energy becomes increasingly tense, more and more attention has been paid to the energy saving of automobiles. Energy and environmental issues urgently require the development of energy-saving and environmentally friendly vehicles, which has become a consensus in the world. primary research focus. In recent years, the research on hydrostatic transmission hybrid vehicles has made great progress, which has gradually attracted the attention of governments, research institutions and major automobile manufacturers. This technology utilizes the characteristic that the hydraulic pump / motor can work in four quadrants, recovers the kinetic energy wasted by traditional vehicles during braking, and stores it in the hydraulic accumulator. The ...

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Problems solved by technology

[0007] The technical problem solved by the present invention is to make up for the large installation space of the transmission system in the traditional hybrid scheme, the heavy weight of the automobile chassis, the long power transmission route, low transmission efficiency, poor transmission performance, many parts, high manufacturing and installation costs, and The core secondary components are expensive, sensitive to oil pollution, poor reliability, slow response of variables in the control, zero drift, and easy to be disturbed. The traditional stepped variable control system has shortcomings such as torque impact and system chattering. Drive axle with integrated hydraulic auxiliary air brake device and control method thereof

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