An intelligent handbrake system for commercial vehicles and its control method

Abstract

The present invention relates to an intelligent parking brake system for commercial vehicles, comprising a parking air reservoir connected to a brake air chamber via an air pipeline. The brake air chamber controls the parking brake of the vehicle wheels. The air pipeline is provided with an intelligent parking brake panel and an actuator connected to a processor. The intelligent parking brake panel and actuator include a panel provided with an automatic mode button, a manual switch, and an emergency automatic mode release switch. The back of the panel is provided with a normally closed single-way solenoid valve connected to the automatic mode button and the emergency automatic mode release switch. The present invention eliminates the handbrake valve and replaces it with an intelligent parking brake panel. The on-off air circuit is still used to implement vehicle start-stop parking: when the air circuit is disconnected, the brake air chamber performs parking; when the air circuit is unblocked, the brake air chamber releases parking. If the intelligent parking system malfunctions, the intelligent parking system can be manually released to achieve manual parking.

Description

Technical Field

[0001] The present invention relates to the field of vehicle braking, and in particular to an intelligent handbrake system for a commercial vehicle and a control method thereof. Background Art

[0002] Currently, the parking brakes of commercial vehicles with air brakes on the market are all manually operated. Figure 1 As shown, it mainly includes a parking air reservoir 1a, which is connected to an air pipe 3a through a hand brake valve 2a, and the air pipe 3a is connected to a brake air chamber 4a. The parking principle of a traditional parking system of an existing air brake vehicle is as follows: when the driver determines that the parking brake needs to be applied based on the road conditions, the hand brake valve 2a needs to be manually pulled up to apply the parking brake; when the parking brake needs to be released, the hand brake valve 2a is pulled down to release the parking brake. The hand brake valve 2a is mainly used to control the opening and closing of the air pipe 3a to achieve the purpose of applying and releasing the parking brake.

[0003] As can be seen from the above description, the driver parks the vehicle by pulling the handbrake. This function relies entirely on the driver's judgment and operation. Frequent parking due to road conditions can be labor intensive for the driver. More importantly, frequent operation of the handbrake can distract the driver, compromising driving safety. Furthermore, when the vehicle needs to be started or stopped on a slope, the slightest negligence can easily cause the vehicle to roll away. This poses a significant safety hazard. If the driver forgets to apply the handbrake upon exiting the vehicle, the vehicle can roll away, potentially leading to an accident. Summary of the Invention

[0004] The purpose of the present invention is to solve the defects of the prior art and provide an intelligent parking brake system for commercial vehicles and a control method thereof.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] An intelligent parking brake system for a commercial vehicle includes a parking air reservoir connected to a brake air chamber via an air pipeline. The brake air chamber controls the parking brake of the vehicle wheels. The air pipeline is provided with an intelligent parking brake panel and an actuator connecting the parking air reservoir and the brake air chamber. The intelligent parking brake panel and the actuator are connected to a processor via a communication line.

[0007] The intelligent handbrake panel and actuator include a panel on which an automatic mode button, a manual switch and an emergency release automatic mode switch are provided;

[0008] A normally closed single-way solenoid valve is provided on the back of the panel. The normally closed single-way solenoid valve is connected to the automatic mode button and the emergency release automatic mode switch. The closing procedure of the normally closed single-way solenoid valve is executed through the automatic mode button and the emergency release automatic mode switch.

[0009] Furthermore, the panel is also provided with a fault indicator light, a fault code display screen, a sound alarm and a sound alarm release button.

[0010] Furthermore, after the normally closed single-way solenoid valve is energized, the air pipeline is unobstructed by closing the valve.

[0011] The control method of the intelligent handbrake system of a commercial vehicle is as follows:

[0012] (1) When the system is normal, start the automatic mode button to indicate that it is in automatic mode;

[0013] (2) When a circuit fault causes the solenoid valve to stop working, the valve controlled by the normally closed single-way solenoid valve is opened by the emergency release automatic mode switch to open the air path and release the vehicle parking;

[0014] (3) When a circuit fault causes the solenoid valve to be unable to open or close the air circuit, and the emergency release automatic mode switch is turned on, the vehicle's parking can be executed or released by turning the manual switch on and off.

[0015] Furthermore, the intelligent handbrake system includes multiple control modes, which control the execution or release of parking by collecting slope signals, vehicle speed signals, key switch signals, brake pedal signals, gear signals and accelerator pedal signals and analyzing them through a processor.

[0016] Furthermore, the control mode includes mode 1: when the vehicle speed is 0, the slope is ≤1%, the throttle opening is 0 and the brake pedal opening is greater than 0; if this state lasts for 4 seconds, parking is executed;

[0017] The smart parking brake is released when the throttle opening is greater than 5%, the gear is in D or R, and the brake pedal opening is 0;

[0018] Mode 2: Vehicle speed is 0; slope is 1% ≤ 5%; throttle opening is 0; brake pedal opening is > 0; if this state lasts for 3 seconds, parking is executed;

[0019] The smart parking brake is released when the throttle opening is greater than 7%, the gear is in D or R, and the brake pedal opening is 0;

[0020] Mode 3: Vehicle speed is 0; slope is 5% ≤ 10%; throttle opening is 0; brake pedal opening is > 0; if this state is maintained for 2.5 seconds, parking is executed;

[0021] The smart parking brake is released when the throttle opening is greater than 9%, the gear is in D or R, and the brake pedal opening is 0;

[0022] Mode 4: Vehicle speed is 0; slope is 10%<15%; throttle opening is 0; brake pedal opening is >0; if this state lasts for 2 seconds, parking is executed;

[0023] The smart parking brake is released when the throttle opening is greater than 11%, the gear is in D or R, and the brake pedal opening is 0;

[0024] Mode 5: Vehicle speed is 0; slope is greater than 15%; throttle opening is 0; brake pedal opening is greater than 0; if this state lasts for 1.5 seconds, parking is executed;

[0025] The smart parking brake is released when the throttle opening is greater than 13%, the gear is in D or R, and the brake pedal opening is 0.

[0026] The beneficial effects of the present invention are as follows: the present invention eliminates the handbrake valve and replaces it with an intelligent handbrake panel, while still using an on-off air circuit to achieve vehicle start-stop and parking: when the air circuit is disconnected, the brake air chamber performs parking; when the air circuit is unblocked, the brake air chamber releases parking. When the intelligent parking system malfunctions, the intelligent parking system can be manually released to achieve manual parking. By collecting relevant signals such as slope, vehicle speed, throttle, and brakes, and through processor analysis and judgment and output of instructions to control the execution or release of parking, the vehicle can be parked automatically, safely, and effectively. This completely eliminates safety hazards and can significantly reduce the driver's operating intensity, ensuring safe driving of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a conventional parking system for an air brake vehicle in the background art;

[0028] Figure 2 is a schematic diagram of a parking system of the present invention;

[0029] Figure 3 is a schematic diagram of a panel of the present invention;

[0030] Figure 4 Schematic cross-sectional view of the panel of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementations.

[0032] like Figures 2 to 4As shown, an intelligent parking brake system for a commercial vehicle includes a parking air reservoir 1, which is connected to a brake air chamber 3 via an air pipe 2. The brake air chamber 3 controls the parking brake of the vehicle wheels. An intelligent parking brake panel and an actuator 4 are provided on the air pipe 2, connecting the parking air reservoir 1 and the brake air chamber 3. The intelligent parking brake panel and actuator 4 are connected to a processor 5 via a communication line.

[0033] The intelligent parking brake panel and actuator 4 includes a panel 6, on which an automatic mode button 7, a manual switch 8 and an emergency release automatic mode switch 9 are provided;

[0034] A normally closed single-way solenoid valve 10 is provided on the back of the panel 6. The normally closed single-way solenoid valve 10 is connected to the automatic mode button 7 and the emergency release automatic mode switch 9. The closing procedure of the normally closed single-way solenoid valve 10 is executed through the automatic mode button 7 and the emergency release automatic mode switch 9.

[0035] Furthermore, the panel 6 is also provided with a fault indicator light 11 , a fault code display screen 12 , a sound alarm 13 and a sound alarm release button 14 .

[0036] Furthermore, after the normally closed single-way solenoid valve 10 is energized, the air pipeline is unobstructed by closing the valve.

[0037] The control method of the intelligent handbrake system of a commercial vehicle is as follows:

[0038] (1) When the system is normal, start the automatic mode button to indicate that it is in automatic mode;

[0039] (2) When a circuit fault causes the solenoid valve to stop working, the valve controlled by the normally closed single-way solenoid valve is opened by the emergency release automatic mode switch to open the air path and release the vehicle parking;

[0040] (3) When a circuit fault causes the solenoid valve to be unable to open or close the air circuit, and the emergency release automatic mode switch is turned on, the vehicle's parking can be executed or released by turning the manual switch on and off.

[0041] Among them, the fault indicator light 11: normal state (green); fault state (red); power off state (off); fault code display screen 12: displays the fault code of the system through a two-digit combination.

[0042] Furthermore, the intelligent handbrake system includes multiple control modes, which control the execution or release of parking by collecting slope signals, vehicle speed signals, key switch signals, brake pedal signals, gear signals and accelerator pedal signals and analyzing them through a processor.

[0043] The system status is divided into the following three types, which are described in detail:

[0044] Self-test normal status:

[0045] The control modes include Mode 1: when the vehicle speed is 0, the slope is ≤1%, the throttle opening is 0 and the brake pedal opening is greater than 0; if this state lasts for 4 seconds, parking is executed;

[0046] The smart parking brake is released when the throttle opening is greater than 5%, the gear is in D or R, and the brake pedal opening is 0;

[0047] Mode 2: Vehicle speed is 0; slope is 1% ≤ 5%; throttle opening is 0; brake pedal opening is > 0; if this state lasts for 3 seconds, parking is executed;

[0048] The smart parking brake is released when the throttle opening is greater than 7%, the gear is in D or R, and the brake pedal opening is 0;

[0049] Mode 3: Vehicle speed is 0; slope is 5% ≤ 10%; throttle opening is 0; brake pedal opening is > 0; if this state is maintained for 2.5 seconds, parking is executed;

[0050] The smart parking brake is released when the throttle opening is greater than 9%, the gear is in D or R, and the brake pedal opening is 0;

[0051] Mode 4: Vehicle speed is 0; slope is 10%<15%; throttle opening is 0; brake pedal opening is >0; if this state lasts for 2 seconds, parking is executed;

[0052] The smart parking brake is released when the throttle opening is greater than 11%, the gear is in D or R, and the brake pedal opening is 0;

[0053] Mode 5: Vehicle speed is 0; slope is greater than 15%; throttle opening is 0; brake pedal opening is greater than 0; if this state lasts for 1.5 seconds, parking is executed;

[0054] The smart parking brake is released when the throttle opening is greater than 13%, the gear is in D or R, and the brake pedal opening is 0.

[0055] Self-test abnormal status:

[0056] The red status indicator light on the panel flashes and the audible alarm sounds to alert the driver. The driver manually opens switch K1 to release the solenoid valve, allowing air to flow. Then, as with conventional vehicles, the driver uses the manual switch to activate and deactivate parking and presses the audible alarm deactivation button to deactivate the alarm to avoid noise disturbance to the driver. Once the vehicle is in a safe position, the fault code is read, the fault is resolved, and the self-test returns to normal intelligent mode.

[0057] Because the solenoid valve is normally closed, when the driver turns off the key, the solenoid valve is de-energized, breaking the air circuit and thus achieving parking. This avoids the situation in traditional parking where the driver forgets to apply the handbrake after turning off the key, resulting in the vehicle rolling away or other accidents.

[0058] This invention eliminates the handbrake valve and replaces it with an intelligent handbrake panel. The system still uses an on-off air circuit to achieve vehicle start / stop and parking: when the air circuit is disconnected, the brake chamber activates parking; when the air circuit is unblocked, the brake chamber releases parking. If the intelligent parking system malfunctions, manual parking can be achieved by manually disabling the intelligent parking system. By collecting relevant signals such as slope, vehicle speed, throttle, and brakes, and then analyzing and outputting commands to control the execution or release of parking, the vehicle can be parked automatically, safely, and effectively. This completely eliminates safety hazards and significantly reduces the driver's operational workload, ensuring safe driving.

[0059] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. An intelligent parking brake system for a commercial vehicle, comprising a parking air reservoir connected to a brake air chamber via an air pipeline, the brake air chamber controlling the parking brake of the vehicle wheels, characterized in that: An intelligent handbrake panel and an actuator connected to the parking air reservoir and the brake air chamber are provided on the air pipe, and the intelligent handbrake panel and the actuator are connected to the processor via a communication line; The intelligent handbrake panel and actuator include a panel on which an automatic mode button, a manual switch and an emergency release automatic mode switch are provided; A normally closed single-way solenoid valve is provided on the back of the panel. The normally closed single-way solenoid valve is connected to the automatic mode button and the emergency release automatic mode switch. The closing procedure of the normally closed single-way solenoid valve is executed through the automatic mode button and the emergency release automatic mode switch. When the normally closed single-way solenoid valve is energized, the air line is unblocked by closing the valve. When the normally closed single-way solenoid valve is de-energized, the air line is automatically disconnected to achieve parking. The specific operation of the intelligent handbrake system is as follows: (1) When the system is normal, start the automatic mode button to indicate that it is in automatic mode; (2) When a circuit fault causes the solenoid valve to stop working, the valve controlled by the normally closed single-way solenoid valve is opened by emergency releasing the automatic mode switch, so that the air path is open and the vehicle parking is released; (3) When a circuit failure causes the solenoid valve to be unable to open or close the air circuit, and the emergency release automatic mode switch is turned on, the vehicle's parking execution or release can be achieved by turning the manual switch on or off; The intelligent parking brake system includes multiple control modes, which collect slope signals, vehicle speed signals, key switch signals, brake pedal signals, gear position signals and accelerator pedal signals and analyze them through a processor to control the execution or release of parking; The control mode includes mode 1: when the vehicle speed is 0, the slope is ≤1%, the throttle opening is 0 and the brake pedal opening is greater than 0; if this state lasts for 4 seconds, parking is executed; The smart parking brake is released when the throttle opening is greater than 5%, the gear is in D or R, and the brake pedal opening is 0.

2. The intelligent parking brake system for commercial vehicles according to claim 1, characterized in that: The panel is also provided with a fault indicator light, a fault code display screen, a sound alarm and a sound alarm release button.

3. The control method of the intelligent parking brake system of a commercial vehicle according to claim 1, characterized in that: The control mode includes mode 2: when the vehicle speed is 0; the slope is 1% < ≤ 5%; the throttle opening is 0; the brake pedal opening is > 0; if this state lasts for 3 seconds, parking is executed; The smart parking brake is released when the throttle opening is greater than 7%, the gear is in D or R, and the brake pedal opening is 0.

4. The control method of the intelligent parking brake system of a commercial vehicle according to claim 1, characterized in that: The control mode includes mode 3: when the vehicle speed is 0; the slope is 5% < ≤ 10%; the throttle opening is 0; the brake pedal opening is > 0; if this state lasts for 2.5 seconds, parking is executed; The smart parking brake is released when the throttle opening is greater than 9%, the gear is in D or R, and the brake pedal opening is 0.

5. The control method of the intelligent parking brake system of a commercial vehicle according to claim 1, characterized in that: The control mode includes mode 4: when the vehicle speed is 0; the slope is 10% < ≤ 15%; the throttle opening is 0; the brake pedal opening is > 0; if this state lasts for 2 seconds, parking is executed; The smart parking brake is released when the throttle opening is greater than 11%, the gear is in D or R, and the brake pedal opening is 0.

6. The control method of the intelligent parking brake system of a commercial vehicle according to claim 1, characterized in that: The control mode includes mode 5: when the vehicle speed is 0 and the slope is greater than 15%, the throttle opening is 0 and the brake pedal opening is greater than 0, and this state lasts for 1.5 seconds, parking is executed; The smart parking brake is released when the throttle opening is greater than 13%, the gear is in D or R, and the brake pedal opening is 0.

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