Brake pedal feeling simulation device and method based on controllable variable stiffness hydraulic cylinder
A technology for simulating a device and a brake pedal, which is applied to braking action starting devices, foot-actuated starting devices, brakes, etc., can solve the problem of not taking into account the dynamic change of hydraulic pressure of the brake pedal simulating device, and improve subjective comfort. The effect of flexibility, low cost and strong adaptability
Active Publication Date: 2021-10-22
TSINGHUA UNIV
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Problems solved by technology
Although the active simulator has better simulation performance, the existing design schemes can only achieve pedal feel calibration under static conditions, without considering the dynamic change of the hydraulic pressure of the brake pedal simulator, so there are still obvious limitations
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[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the following will clearly and completely describe the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention belong to the protection scope of the present invention.
[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for convenience The present invention is described and simplified descriptions do not indicate or imply that the dev...
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The invention relates to a brake pedal feeling simulation device and method based on a controllable variable stiffness hydraulic cylinder, which includes a simulated cylinder assembly, a simulated cylinder pressure sensor and a three-way joint connected in sequence, and the other two ends of the three-way joint are respectively passed through The oil pipe of the master cylinder is connected to the brake master cylinder and the hydraulic adjustment unit; the simulation cylinder assembly and the adjustment motor are mechanically connected to the reduction mechanism assembly; the simulation cylinder assembly is the actuator for adjusting the hydraulic pressure felt by the pedal; The series-connected spring-piston system of the cylinder assembly provides power with equivalent rigidity; the deceleration mechanism assembly is used for decelerating and increasing torque, and transmits the adjusted driving force of the simulated cylinder assembly output by the motor to the simulated cylinder assembly. The present invention controls the movement of the regulating motor by comparing the MAP data of the pedal feeling characteristics at different pedal speeds, and combines the feedback information such as the push rod speed and the hydraulic pressure deviation, so as to realize the feedback tracking control of the expected master cylinder pressure and accurately simulate the dynamic process. brake pedal feel.
Description
technical field [0001] The invention relates to the technical field of automobile braking, in particular to a brake pedal feeling simulation device and method based on a controllable variable stiffness hydraulic cylinder. Background technique [0002] The electrification and intelligence of automobile technology put forward a higher level of requirements for the braking system, especially in the context of integrated development of the wire-controlled chassis system, how to make the wire-controlled braking system more comfortable and safe through existing technical means , Efficient performance level, is the key that brake system developers need to consider deeply. [0003] Technical solutions based on brake-by-wire systems such as booster motors, high-voltage accumulators, and new master cylinders have become the mainstream of design and development. Different from the direct connection between the master cylinder and the wheel cylinder of the traditional mechanical hydrau...
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IPC IPC(8): B60T8/40B60T7/04
CPCB60T7/042B60T8/409
Inventor 李超何承坤张俊智
Owner TSINGHUA UNIV