Roots type magnetorheological fluid medium high-pressure retarder and automobile

Abstract

The invention provides a Roots type magnetorheological fluid medium high-pressure retarder and an automobile, and relates to the technical field of retarders. The Roots type magnetorheological fluid medium high-pressure retarder comprises a working shell, a Roots type transmission assembly and a magnetic field generating piece capable of generating a magnetic field and adjusting the magnetic field intensity. A working cavity for the Roots type transmission assembly to move is formed in the working shell, an oil inlet and an oil outlet which are communicated with the working cavity are formed in the working shell, an oil inlet pipe is connected to the position, located at the oil inlet, of the working shell, and an oil outlet pipe is connected to the position, located at the oil outlet, of the working shell; the working cavity is filled with magnetorheological fluid working media, and a magnetic field generating piece is arranged in the oil inlet pipe and / or the oil outlet pipe. The automobile comprises an automobile body and the roots type magnetorheological fluid medium high-pressure retarder. The Roots type magnetorheological fluid medium high-pressure retarder is arranged on an automobile body and is connected with an automobile transmission shaft through a speed-reducing and torque-increasing gear pair. The technical effects that the retarder is quick in response and large in braking force are achieved.

Description

technical field [0001] The invention relates to the technical field of retarders, in particular to a Roots-type magneto-rheological fluid medium high-pressure retarder and an automobile. Background technique [0002] According to different working principles, automotive retarders can be divided into typical structural forms such as engine retarders, hydraulic retarders, electric turbine retarders, motor retarders and aerodynamic retarders. [0003] The retarding efficiency of the hydraulic retarder is higher than that of the engine retarder, and it can drive downhill at a relatively high speed. During operation, the manipulation of the control valve applies pressure to the oil pool, so that the working fluid is filled into the work between the rotor and the stator. In the chamber, the kinetic energy of the vehicle is converted into heat energy due to the friction of the working fluid and the impact on the stator, which increases the temperature of the working fluid, thereby ...

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Problems solved by technology

[0003] The retarding efficiency of the hydraulic retarder is higher than that of the engine retarder, and it can drive downhill at a relatively high speed. During operation, the manipulation of the control valve applies pressure to the oil pool, so that the working fluid is filled into the work between the rotor and the stator. In the chamber, the kinetic energy of the vehicle is converted into heat energy due to the friction of the working fluid and the impact on the stator, which increases the temperature of the working fluid, thereby converting the mechanical energy into heat energy, and then dissipating the heat energy, so as to realize the slowing down of the car. However, the low-speed braking force of the hydraulic retarder is insufficient, and the reaction speed is slow

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