Brake master cylinder assembly, electronic hydraulic brake system and motor vehicle

A brake master cylinder and hydraulic brake technology, which is applied in the direction of brake transmission, brakes, vehicle components, etc., can solve problems such as brake failure, master cylinder push rod collapse, false triggering, etc., to increase the size of the foot space, damage reduction effects

Active Publication Date: 2022-05-03
CONTINENTAL AUTOMOTIVE SYST SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current collapse brake pedals all adopt the passive collapse of the push rod of the master cylinder, that is, a preload is set through the interference fit of the spring or the mechanical structure. When the external force exceeds this value, the push rod of the master cylinder will collapse
If the value of the preload is designed too small, it is easy to cause false triggering, that is, collapse without collision and cause conventional braking to fail
On the other hand, if the design value is too large, the proper collision protection effect will not be achieved

Method used

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  • Brake master cylinder assembly, electronic hydraulic brake system and motor vehicle
  • Brake master cylinder assembly, electronic hydraulic brake system and motor vehicle

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Embodiment approach

[0022] figure 1 A schematic diagram of a brake master cylinder assembly according to an embodiment of the present invention is shown. like figure 1 As shown, the brake master cylinder assembly of this embodiment includes a push rod 2 and a brake master cylinder 3 . The first end of the push rod 2 is fixedly connected with the brake pedal 1 . The second end of the push rod 2 is fixedly connected with the piston of the brake master cylinder 3 . In the illustrated embodiment, the brake master cylinder 3 has two successively arranged first pistons 31 and second pistons 32 in the housing, and the second end of the push rod 2 can pass through the pressure block 4 (see figure 2 ) is fixedly connected with the first end of the first piston 31. A first hydraulic chamber C1 is defined between the first piston 31 and the second piston 32 , and a second hydraulic chamber C2 is defined between the second piston 32 and the housing bottom of the master cylinder 3 . In addition, the fir...

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Abstract

The invention relates to a brake master cylinder assembly, an electronic hydraulic braking system with the brake master cylinder assembly and a motor vehicle with the electronic hydraulic brake system. The brake master cylinder assembly includes a push rod (2) and a brake master cylinder (3). The first end of the push rod is connected to the brake pedal (1), and the second end of the push rod is connected to the piston of the brake master cylinder ( 31) connected to the first end. A seal (5) is provided on the end side of the brake master cylinder facing the brake pedal, and the seal together with the first end of the piston defines a collapse hydraulic chamber (C3) in the brake master cylinder. During the collision, the pressure medium can enter the collapse hydraulic cavity through the collapse passage (L9). According to the present invention, when the vehicle collides, the active collapse of the push rod can be realized, the driver's foot space is increased, and the damage caused by the intrusion of the front cabin is reduced.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to a brake master cylinder assembly, an electronic hydraulic braking system with the brake master cylinder assembly and a motor vehicle with the electronic hydraulic brake system. Background technique [0002] Electrohydraulic braking systems, also known as brake-by-wire systems, are widely used in today's motor vehicles due to their many advantages over conventional braking systems. Like the traditional braking system, when a motor vehicle equipped with such an electronic hydraulic braking system undergoes a severe frontal collision, the front cabin may be severely deformed due to the severe collision, and the powertrain presses the entire rear of the dash panel. If the pedal arm and pedal surface are moved, impact and compression damage will be caused to the driver's legs, forming a secondary collision injury. [0003] It has been proposed in the prior art to avoi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T13/14B60T13/68B60T13/74
CPCB60T13/143B60T13/148B60T13/686B60T13/745
Inventor 孙志超熊军刘伟华
Owner CONTINENTAL AUTOMOTIVE SYST SHANGHAI
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