Electric hydraulic braking redundant structure suitable for intelligent driving vehicle

Abstract

The utility model relates to the technical field of vehicle electric hydraulic braking redundant structures, in particular to an electric hydraulic braking redundant structure suitable for an intelligent driving vehicle. According to the technical scheme, the brake system comprises a brake system, an oil can, an ESC and a wheel edge brake cylinder, and further comprises two electronic hydraulic brakes arranged in the brake system, a brake pedal is arranged in the brake system, the two electronic hydraulic brakes are connected through a CAN line, one electronic hydraulic brake is connected with the pedal, and the other electronic hydraulic brake is connected with the brake pedal. And the other electronic hydraulic brake is connected with an original electronic hydraulic brake system of the vehicle through a CAN (Controller Area Network) line of the vehicle. When one of the electronic hydraulic braking systems fails, the other electronic hydraulic braking system can provide braking force for the vehicle in time, so that the safety of the vehicle during running is greatly improved, the vehicle is prevented from being out of control due to the failure of the vehicle braking system, and serious accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle electric hydraulic brake redundant structure, in particular to an electric hydraulic brake redundant structure suitable for intelligent driving vehicles. Background Art

[0002] In recent years, the unmanned driving and intelligent driving technologies of electric vehicles have developed rapidly, and the level of unmanned driving has become higher and higher, which has put forward higher requirements for the safety performance of vehicles. In particular, the redundant design of the steering system and the braking system is particularly important.

[0003] At present, the braking system of most cars is an electronic hydraulic braking system, which is driven by the motor through the worm gear to increase torque and push the brake master cylinder, so that the brake hydraulic oil increases pressure. Then the braking force is provided to the brake wheel cylinder through the brake pipeline, thereby pushing the brake pad to brake the vehicle. When the vehicle is in the intelligent driving state, once the electronic hydraulic braking system fails, the driver cannot predict and effectively take over, which may cause the vehicle to lose control and cause a serious accident. Utility Model Content

[0004] The utility model aims to solve the problems existing in the background technology and proposes an electric hydraulic brake redundant structure applicable to intelligent driving vehicles which can still provide braking force when the electronic hydraulic brake system fails.

[0005] The technical solution of the utility model is: an electric hydraulic brake redundant structure suitable for intelligent driving vehicles, including a brake system, an oil tank and ESC and a wheel brake cylinder, and also includes:

[0006] Two electronic hydraulic brakes are arranged in the braking system, and the two electronic hydraulic brakes can work independently of each other or simultaneously;

[0007] A brake pedal is provided in the brake system, and the two electronic hydraulic brakes are connected via a CAN line, and the CAN line controls the working states of the two electronic hydraulic brakes;

[0008] One of the electronic hydraulic brakes is connected to a pedal, and the other electronic hydraulic brake is connected to an existing electronic hydraulic brake system of the vehicle via a CAN line of the vehicle.

[0009] Optionally, the two electronic hydraulic brakes share the same oil tank and power supply.

[0010] Optionally, the two electronic hydraulic brakes are connected to the ESC via a brake line.

[0011] Compared with the prior art, the utility model has the following beneficial technical effects: an electronic hydraulic brake system is added on the basis of the current mainstream electronic hydraulic brake system, with relatively few structural changes, most of the original parts can still be used, and the redundant performance of electronic braking can be achieved relatively economically. When one of the electronic hydraulic brake systems fails, the other electronic hydraulic brake system can provide braking force to the vehicle in time, greatly improving the safety of the vehicle during driving, preventing the vehicle from losing control due to failure of the vehicle's brake system, and avoiding serious accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Provide a schematic diagram of the structure of the utility model;

[0013] Figure 2 A schematic diagram of electrical connection of the utility model is given.

[0014] Figure numerals: 1. electronic hydraulic brake; 2. oil tank; 3. pedal; 4. ESC; 5. wheel-side brake cylinder. DETAILED DESCRIPTION

[0015] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0016] like Figure 1-2 As shown, the utility model proposes an electric hydraulic brake redundant structure suitable for intelligent driving vehicles, including a brake system, an oil tank 2 and an ESC 4 and a wheel brake cylinder 5. Two electronic hydraulic brakes 1 are arranged in the brake system. The two electronic hydraulic brakes 1 can work independently of each other or work simultaneously. The brake system is provided with at least one brake pedal 3, and the brake pedal 3 provides braking force for the brake system. The two electronic hydraulic brakes 1 are connected via a CAN line, and the CAN line controls the working state of the two electronic hydraulic brakes 1.

[0017] Figure 2The signal connection in the diagram is mainly that EHB2 receives the brake request signal from the automatic driving by stepping on the mechanical pedal or receiving the brake request signal from the automatic driving. In the figure, the 12V battery is connected to the vehicle battery, so that even if the vehicle is under high pressure, EHB still has power to help save labor and can also receive the brake request of the automatic driving to achieve braking. KL15 in the figure is the activation signal. Every time the vehicle starts, EHB is started through KL15. CAN1-H and CAN1-L are signals transmitted in the vehicle CAN bus. It is a differential signal. The VCU (vehicle control unit) transmits the model through CAN and EHB, thereby sending a brake signal to achieve braking.

[0018] The two electronic hydraulic brakes share the same set of oil (one oil pot 2) and power supply, one of the electronic hydraulic brakes 1 is connected to the pedal 3, and the other electronic hydraulic brake 1 is connected to the original electronic hydraulic brake system of the vehicle through the vehicle's CAN line. The two electronic hydraulic brakes 1 are connected to ESC4 (electronic stability control system) through brake pipes, and finally the brake fluid flows from ESC4 to the four wheel side brake cylinders 5.

[0019] When the vehicle is driving normally, the brake pedal 3 is pressed, and the brake pedal 3 controls the corresponding electronic hydraulic brake 1. The other electronic hydraulic brake 1 receives the signal through CAN and works simultaneously with the electronic hydraulic brake 1 with the brake pedal 3, pushing the brake hydraulic oil to flow to the ESC 4 and finally to the wheel-side brake cylinder 5 to achieve braking.

[0020] In the intelligent driving state, the two electronic hydraulic brakes 1 brake simultaneously. When any one of the electronic hydraulic brakes 1 fails, the other electronic hydraulic brake 1 can also realize hydraulic braking.

[0021] In extreme cases, if both electronic hydraulic brakes 1 fail at the same time (power off), ESC4 will perform emergency pressure braking.

[0022] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. An electric hydraulic brake redundancy structure applicable to an intelligent driving vehicle, comprising a brake system, an oil tank (2), an ESC (4) and a wheel brake cylinder (5), characterized in that: Also includes: Two electronic hydraulic brakes (1) are arranged in the braking system; A brake pedal (3) is provided in the brake system, and the two electronic hydraulic brakes (1) are connected via a CAN line, and the CAN line controls the working state of the two electronic hydraulic brakes (1); One of the electronic hydraulic brakes (1) is connected to the pedal (3), and the other electronic hydraulic brake (1) is connected to an existing electronic hydraulic brake system of the vehicle via a CAN line of the vehicle.

2. The electric hydraulic brake redundancy structure applicable to intelligent driving vehicles according to claim 1 is characterized in that: The two electronic hydraulic brakes (1) share the same oil tank (2) and power supply.

3. The electric hydraulic brake redundancy structure applicable to intelligent driving vehicles according to claim 1 is characterized in that: The two electronic hydraulic brakes (1) are connected to the ESC (4) via a brake pipeline.

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