Motor-controlled hydraulic braking system
A technology of hydraulic braking and motor control, which is used in electric braking systems, brakes, electric vehicles, etc., and can solve problems such as a large number of parts, no alternatives, and complex transmission mechanisms.
Active Publication Date: 2021-06-08
HEFEI UNIV OF TECH
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Problems solved by technology
[0003] The transmission mechanism of the existing brake-by-wire system is complicated, the number of parts is large, the complexity is high, and the cost of manufacturing and maintenance is high; or the safety of the system is poor, and there is no alternative emergency solution in the case of system failure; or the function is simple and cannot be realized. The decoupling between the pedal and the master cylinder makes it impossible to realize the braking energy recovery function and increases the energy loss of the braking system
Method used
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Embodiment Construction
[0036] In this embodiment, a motor-controlled hydraulic braking system is introduced, including: an information receiving and conversion module, a function selection module, and a brake execution module;
[0037] refer to figure 1 , figure 2 The brake actuator is composed of: power source, transmission structure and hydraulic structure;
[0038] The power source is composed of brushless DC motor 2 and pedal thrust;
[0039] The transmission mechanism is composed of a primary master gear 3 meshing with a primary driven gear 4, a secondary primary gear 5 meshing with a secondary driven gear 7, and a lead screw meshing with the inner ring of the secondary driven gear 7. 11 composition;
[0040] The hydraulic part is mainly the master cylinder, the wheel cylinder and the hydraulic lines between them. The brake pipeline of the master cylinder is connected with the brake pipeline of the wheel cylinder after passing through the external ABS anti-lock brake controller.
[0041]T...
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The invention discloses a motor-controlled hydraulic braking system, which changes the structure of a hydraulic braking system in which a traditional braking system depends on treading a pedal and boosting by a vacuum booster, and the system mainly consists of three modules, namely an information receiving and converting module, a function selecting module and a braking executing module. The information receiving and converting module is composed of an ehBCU controller and a motor controller of a brushless direct current motor. The function selection module comprises a power source motor failure backup module, a braking energy recovery module and a redundant hydraulic control module; the braking executing mechanism comprises a power source, a transmission structure and a hydraulic structure. According to the motor-controlled hydraulic braking system, the braking response performance is greatly improved, the intelligent requirement of an electric vehicle for a drive-by-wire chassis is met, an alternative scheme is provided under the condition that the system is damaged, and the safety of the system is improved.
Description
technical field [0001] The invention belongs to the technical field of electric vehicle braking, and relates to a motor-controlled hydraulic braking system. Background technique [0002] With the vigorous development of automobile electrification and intelligence, brake-by-wire technology is an important research direction of chassis technology by wire, which involves key vehicle issues such as vehicle safety performance and driving feeling. The brake-by-wire system occupies a small space, while the vacuum booster in the traditional braking system occupies a large area, and there is no engine in the tram to provide vacuum for the vacuum booster. Brake-by-wire technology has fast pressure build-up time, good dynamic response characteristics, and precise control of brake pressure. Smart cars can use the brake-by-wire system as an important underlying actuator for driving assistance. Therefore, the brake-by-wire system is an urgently needed product in the current market. It is...
Claims
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IPC IPC(8): B60T13/58B60T13/66B60L7/10
CPCB60T13/588B60T13/66B60L7/10
Inventor 石琴刘鑫贺林应贺烈孙镜淇林合秋王凯
Owner HEFEI UNIV OF TECH