Linear braking system for small motor vehicle

Abstract

The utility model relates to the technical field of small motor vehicle braking, and discloses a linear braking system for a small motor vehicle, which comprises a mechanical braking main cylinder assembly, a foot feeling simulator assembly and a hydraulic unit assembly, and the hydraulic unit assembly comprises a hydraulic control unit (HCU), a motor and a linear braking controller assembly. The linear braking system can integrate multiple functions of linear braking, ESC, ABS, TCS and the like, the braking time of a vehicle is shortened, and the execution efficiency, reliability and stability of the braking system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to small motor vehicle braking technical field, especially a linear brake system for small motor vehicle. BACKGROUND

[0002] The brake system on the existing small motor vehicle, such as motorcycle, sand vehicle, all terrain vehicle, old car etc., can only realize basic brake function, and under the condition that the front wheel (front axle) or rear wheel (rear axle) brake fails, brake intensity is weakened, or hand brake and foot brake do not cooperate well, vehicle sideslip and rollover are caused, and the driver is harmed.

[0003] Even if many high-end small motor vehicles are equipped with ABS now, but on the vehicle with hand brake and foot brake, hand brake and foot brake joint braking is also needed, and ABS can play the due role, and when one of hand brake and foot brake fails, ABS also cannot play the role, and the driving safety of vehicle on complex road surface is influenced.

[0004] Now there are many kinds of vehicles, considering different life purposes and use convenience, more and more small vehicles appear on the road, such as motorcycle, old car, leading to the traffic situation on urban road surface being more and more complex, in addition, some motorcycle, sand vehicle, all terrain vehicle off-road enthusiasts often drive vehicle on road surface with very complex road condition, therefore, in order to protect the safety of driver and pedestrian, small motor vehicle actually needs a more efficient, more reliable, more stable brake system to ensure the safety of driver, and the linear brake system of the utility model is used for small motor vehicle, and the requirements of efficient braking, double redundancy, stable reliability can be met. SUMMARY

[0005] In order to overcome the insufficient of the prior art, the utility model provides a linear brake system for small motor vehicle.

[0006] The utility model adopts the technical scheme of:

[0007] A linear brake system for small motor vehicle, including mechanical brake master cylinder assembly, foot feeling simulator assembly, hydraulic unit assembly, mechanical brake master cylinder assembly includes mechanical master cylinder and hand brake displacement sensor, and hand brake displacement sensor is placed in mechanical master cylinder;Hydraulic unit assembly includes hydraulic control unit HCU, motor and linear brake controller assembly;Mechanical master cylinder is connected through the flexible tube with hydraulic control unit HCU, and foot feeling simulator assembly is connected with motor and linear brake controller assembly through wiring harness.

[0008] Further, the hydraulic control unit HCU includes a hand feeling mechanical simulator, a plunger assembly, a CSV valve, a PSV valve, an IV valve, an OV valve, a mechanical master cylinder pressure sensor and a plunger cylinder pressure sensor, an SSV electromagnetic valve, the mechanical master cylinder pressure sensor is connected with the oil inlet of the hydraulic control unit HCU through an internal oil channel, meanwhile, the internal pipeline of the hydraulic control unit HCU is connected with the oil inlet port of the CSV valve and the oil inlet port of the SSV electromagnetic valve, the oil outlet port of the SSV electromagnetic valve is connected with the pressure cavity of the hand feeling mechanical simulator, the constant pressure cavity of the hand feeling mechanical simulator is connected with an oil pot, the oil outlet port of the CSV valve is connected with the oil inlet port of the IV valve, the motor and the linear brake controller assembly are mechanically connected with the plunger assembly through a gear, the plunger cylinder pressure sensor is connected with the oil outlet port of the plunger assembly, the oil outlet port of the PSV valve is connected with the oil outlet port of the CSV valve and the oil inlet port of the IV valve.

[0009] Further, the number of vehicle tires of the small motor vehicle equipped with the linear brake system is 2-4.

[0010] Further, the number of the IV valves and the OV valves is respectively same as the number of the tires of the small motor vehicle equipped with the linear brake system.

[0011] Compared with the prior art, the utility model improves the high efficiency, reliability and stability of the brake system execution:

[0012] (1) the brake module and the ABS module of the present small motor vehicle are integrated, the volume is smaller, and meanwhile, the ESC, TCS and other functions are increased;

[0013] (2) the mechanical and electric brake double redundancy backup is provided;

[0014] (3) in the case that the driver has a safety belt, active braking can also be realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is linear brake system principle diagram for small motor vehicle of the utility model;

[0016] Wherein: foot brake displacement sensor 1, foot brake mechanical simulator 2, mechanical master cylinder 3, SSV electromagnetic valve 4, mechanical master cylinder pressure sensor 5, CSV valve 6, plunger assembly 7, plunger cylinder pressure sensor 8, pressure regulating first electromagnetic valve 9, pressure regulating second electromagnetic valve 10, pressure regulating third electromagnetic valve 11, PSV valve 12, pressure regulating fourth electromagnetic valve 13, motor and linear brake controller assembly 14, pressure regulating fifth electromagnetic valve 15, pressure regulating sixth electromagnetic valve 16, pressure regulating seventh electromagnetic valve 17, pressure regulating eighth electromagnetic valve 18, hand feeling mechanical simulator 19, hand brake displacement sensor 20, A-hydraulic unit assembly, B-mechanical brake master cylinder assembly, C-foot feeling simulator assembly. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] This utility model discloses a linear braking system for small motor vehicles, comprising three main parts: a mechanical brake master cylinder assembly, a foot-feed simulator assembly, and a hydraulic unit assembly. Taking a four-wheeled ATV as an example, ... Figure 1 As shown, the mechanical brake master cylinder assembly includes a mechanical master cylinder 3 and a handbrake displacement sensor 20. The handbrake displacement sensor 20 is built into the mechanical master cylinder 3 and sends a displacement signal as the master cylinder piston moves. The foot-feel simulator assembly includes a foot brake mechanical simulator 2 and a foot brake displacement sensor 1. The hydraulic unit assembly includes a hand-feel mechanical simulator 19, a motor and linear brake controller assembly 14, a plunger assembly 7, a CSV valve 6, a PSV valve 12, a mechanical master cylinder pressure sensor 5, a plunger cylinder pressure sensor 8, and pressure regulating solenoid valves: four IV valves 11 / 13 / 15 / 17 and four OV valves 9 / 10 / 16 / 18 (the number can be determined according to the vehicle model, whether it is two-wheeled, three-wheeled, or four-wheeled; two-wheeled vehicles use two IV valves and two OV valves, three-wheeled vehicles use three IV valves and three OV valves, and four-wheeled ATVs use four IV valves and four OV valves).

[0019] All components of the hydraulic unit assembly are mounted on a valve body, and the parts are connected by pipes inside the valve body. Figure 1 The connection is made according to the principle shown. The mechanical brake master cylinder assembly is connected to the valve body and the linear brake controller via oil pipes and wiring harnesses, respectively, while the foot-feel simulator assembly is connected to the linear brake controller via a wiring harness.

[0020] The outlet of the mechanical brake master cylinder assembly is connected to the inlet of the hydraulic unit assembly via a hose; the mechanical master cylinder pressure sensor 5 is connected to the inlet of the hydraulic unit via an internal oil passage to detect the master cylinder pressure. At the same time, the internal pipe of the inlet connects the inlet port of the CSV valve 6 and the inlet port of the SSV solenoid valve 4. The outlet port of the SSV solenoid valve 4 is connected to the pressure chamber of the hand-feel mechanical simulator 19. The atmospheric pressure chamber of the hand-feel mechanical simulator 19 is connected to the oil reservoir. The outlet port of the CSV valve 6 is connected to the inlet port of the IV valves 11 / 13 / 15 / 17.

[0021] The motor and linear brake controller assembly 14 is mechanically connected with the plunger assembly 7 through gears, which converts the rotary motion of the motor into the linear motion of the booster cylinder, so that the brake fluid in the booster cylinder is converted from normal pressure into high pressure. The plunger cylinder pressure sensor 8 is connected with the oil outlet port of the booster cylinder to detect the oil pressure of the plunger assembly 7. The oil inlet port of the PSV valve 12 is connected with the oil outlet port of the plunger assembly 7. The oil outlet port of the PSV valve 12 is connected with the oil outlet port of the CSV valve 6 and the oil inlet ports of the IV valves 11 / 13 / 15 / 17. The oil outlet ports of the IV valves 11 / 13 / 15 / 17 are respectively connected with the oil outlet ports FL / FR / RL / RR. The oil outlet ports FL / FR / RL / RR are connected with the wheel cylinders of the left front wheel / right front wheel / left rear wheel / right rear wheel of the vehicle through external hoses to conduct high-pressure brake fluid to realize braking. The oil inlet ports of the OV valves 10 / 9 / 16 / 18 are respectively connected with the oil outlet ports FL / FR / RL / RR. The oil outlet ports of the OV valves 10 / 9 / 16 / 18 are connected with the oil tank.

[0022] When the driver steps on the pedal feel simulator assembly or squeezes the master cylinder assembly of the mechanical brake, one working condition is that the driver only squeezes the master cylinder assembly of the mechanical brake or steps on the pedal feel simulator assembly. Another working condition is that the driver squeezes the master cylinder assembly of the mechanical brake and steps on the pedal feel simulator assembly. In the first working condition, the displacement sensor sends a displacement signal to the linear brake controller. In the second working condition, the linear brake controller logically judges the sequence of the two displacement signals. The linear brake controller takes the displacement signal received first as the standard.

[0023] When the linear brake controller receives the displacement signal, it controls the CSV valve 6 to be powered off and the SSV solenoid valve to be powered on. At this time, the oil of the master cylinder enters the mechanical feel simulator 19. Meanwhile, the controller controls the PSV valve 12 to be powered on, and the motor starts to act to push the plunger assembly 7 to generate high-pressure oil. The high-pressure oil passes through the IV valves 11 / 13 / 15 / 17 and enters the wheel cylinder to realize the braking function.

[0024] When the wheel cylinder pressure reaches the locking point, the IV valves 11 / 13 / 15 / 17 are closed, and the OV valves 9 / 10 / 16 / 18 are opened to reduce the pressure and realize the ABS function.

[0025] When the vehicle turns on a wet and slippery road surface, the gyroscope and wheel speed sensor will detect the vehicle body state and wheel speed information, and will brake each wheel through the opening and closing of the solenoid valve to adjust the vehicle body state.

[0026] When the vehicle starts on an icy uphill road, the system will detect the slip ratio of the driving wheel, and then will control the torque of the driving wheel through the control of the solenoid opening and closing to control the slip ratio to the minimum, thereby improving the climbing ability of the vehicle on the icy road slope.

[0027] If the vehicle is equipped with a ranging sensor, the utility model can cooperate with the ranging sensor to actively brake, and the specific working principle is that the ranging sensor is too close to the front vehicle distance, and the signal is fed back to the linear brake controller, and the linear brake controller will control the motor to actively brake.

Claims

1. A linear braking system for small motor vehicles, characterized in that: The linear braking system for small motor vehicles includes a mechanical brake master cylinder assembly, a foot-feed simulator assembly, and a hydraulic unit assembly. The mechanical brake master cylinder assembly includes a mechanical master cylinder and a handbrake displacement sensor, which is located inside the mechanical master cylinder. The hydraulic unit assembly includes a hydraulic control unit (HCU), a motor, and a linear brake controller assembly. The mechanical master cylinder and the hydraulic control unit (HCU) are connected via hoses, and the foot-feed simulator assembly is connected to the motor and linear brake controller assembly via a wiring harness.

2. The linear braking system for small motor vehicles according to claim 1, characterized in that: The hydraulic control unit (HCU) includes a hand-feed mechanical simulator, a plunger assembly, a CSV valve, a PSV valve, an IV valve, an OV valve, a mechanical master cylinder pressure sensor, a plunger cylinder pressure sensor, and an SSV solenoid valve. The mechanical master cylinder pressure sensor is connected to the oil inlet of the HCU via an internal oil passage. Simultaneously, the internal piping of the HCU connects the oil inlet ports of the CSV valve and the SSV solenoid valve. The oil outlet port of the SSV solenoid valve is connected to the pressure chamber of the hand-feed mechanical simulator, and the atmospheric pressure chamber of the hand-feed mechanical simulator is connected to an oil reservoir. The oil outlet port of the CSV valve is connected to the oil inlet port of the IV valve. The motor and linear brake controller assembly is mechanically connected to the plunger assembly via gears. The plunger cylinder pressure sensor is connected to the oil outlet port of the plunger assembly. The oil inlet port of the PSV valve is connected to the oil outlet port of the plunger assembly, and the oil outlet port of the PSV valve is connected to both the oil outlet port of the CSV valve and the oil inlet port of the IV valve.

3. The linear braking system for small motor vehicles according to claim 2, characterized in that: Small motor vehicles equipped with linear braking systems typically have 2 to 4 tires.

4. The linear braking system for small motor vehicles according to claim 3, characterized in that: The number of IV valves and OV valves is the same as the number of tires of a small motor vehicle equipped with a linear braking system.

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