A control device and control method capable of temporarily enhancing hill-holding capability

Abstract

The present invention discloses a control device and control method for temporarily enhancing hill-holding capability, relating to the field of parking spring brake systems. The control device comprises a service brake line, comprising a service brake line, and a second service air reservoir, a foot brake valve, a one-way valve, a first relay valve, and a brake connected in sequence via the service brake line; a parking brake line, comprising a parking brake line, and a parking air reservoir, a hand brake valve, a second relay valve, and a brake connected in sequence via the parking brake line; a first service air reservoir connected to the first relay valve via a first connecting line; a second connecting line connected between the parking air reservoir and the second relay valve; and an exhaust valve, which opens to exhaust air from the control port of the first relay valve when the hand brake valve is in the driving position; and closes when the hand brake valve is in the parking position. The present invention allows a vehicle to temporarily enhance its hill-holding capability when the driver's foot is off the service brake pedal.

Description

Technical Field

[0001] The present invention relates to the field of parking spring brake systems, and in particular to a control device and a control method capable of temporarily enhancing hill-holding capability. Background Art

[0002] Service braking refers to applying the brakes to slow down the car while it is moving, which is also called using the foot brake. Parking brake is the handbrake used after the car has come to a complete stop to prevent the vehicle from sliding forward or backward.

[0003] Currently, the two braking modes are controlled by two independent circuits, one for service braking and the other for parking braking. When a vehicle is parked on a steep slope for a long time, in order to temporarily improve the vehicle's holding ability, it is necessary to maintain the combined use of service braking and parking braking, or to ensure that the parking brake capacity is large enough to meet the needs of the vehicle's long parking time on the steep slope. However, this presents the following problems:

[0004] 1. Increasing the specifications or quantity of spring brakes in design (usually spring brakes can be added to the front axle and other axles) to adapt to special working conditions, but this will bring about a significant increase in costs;

[0005] 2. Without changing the size and number of brakes, the driver is required to apply the parking brake while simultaneously depressing the service brake pedal, adding braking force to temporarily enhance hill-holding capability. However, the driver's foot cannot be released from the service brake pedal at this time, making it difficult to maintain comfort and posing a safety hazard. Summary of the Invention

[0006] In view of the defects in the prior art, the present invention solves the technical problem of how to temporarily enhance the vehicle's hill-holding ability when the driver's foot leaves the service brake pedal.

[0007] To achieve the above objectives, in a first aspect, the present invention provides a control device capable of temporarily enhancing hill-holding capability, comprising:

[0008] a service brake line comprising a service brake line, and a second service air reservoir, a foot brake valve, a one-way valve, a first relay valve, and a brake connected in sequence through the service brake line;

[0009] a parking brake line comprising a parking brake line, and a parking air reservoir, a hand brake valve, a second relay valve, and a brake connected in sequence via the parking brake line;

[0010] a first driving air reservoir connected to the first relay valve via a first connecting pipeline;

[0011] a second connecting pipeline connected between the parking air reservoir and the second relay valve;

[0012] Exhaust valve, when the hand brake valve is in the driving position, the exhaust valve opens to exhaust the control port of the first relay valve; when the hand brake valve is in the parking position, the exhaust valve closes.

[0013] In combination with the first aspect, in one embodiment, the foot brake valve includes a fourth air inlet, a third air outlet and a second exhaust port, the fourth air inlet is connected to the second service air cylinder through the service brake pipeline, the third air outlet is connected to the one-way valve through the service brake pipeline, the second exhaust port is connected to the external space, and one of the fourth air inlet and the second exhaust port can be connected to the third air outlet.

[0014] In one embodiment, the exhaust valve includes a reverse stop valve, a third connecting pipeline, a fourth connecting pipeline, a third air outlet and a second exhaust port. The reverse stop valve is connected in parallel with the one-way valve through the third connecting pipeline. The gas at the control port of the first relay valve is discharged through the third connecting pipeline, the reverse stop valve, the third air outlet and the second exhaust port. The reverse stop valve is connected to the hand brake valve through the fourth connecting pipeline.

[0015] In one embodiment, the reverse shut-off valve includes a first air inlet, a first air outlet, and a first control port. The first control port is connected to the hand brake valve through a fourth connecting line. The first air inlet and the first air outlet are respectively connected to the service brake lines on both sides of the one-way valve through a third connecting line. The first control port is used to control the connection and disconnection between the first air inlet and the first air outlet.

[0016] In one embodiment, the brake further comprises two second air inlets, the service brake chamber of the brake is connected to the first relay valve via one of the second air inlets, and the parking brake chamber of the brake is connected to the second relay valve via the other of the second air inlets.

[0017] In one embodiment, the first relay valve includes a second control port, a third air inlet, a second air outlet and a first exhaust port. The second control port is connected to the one-way valve through a service brake pipeline, which is used to control the connection and disconnection between the third air inlet and the second air outlet. The third air inlet is connected to the first service air cylinder through a first connecting pipeline, the second air outlet is connected to the brake through a service brake pipeline, and the first exhaust port is connected to the external space. Either the third air inlet or the first exhaust port can be connected to the second air outlet.

[0018] In one embodiment, the second relay valve includes a third control port, a fifth air inlet, a fourth air outlet and a third exhaust port. The third control port is connected to the hand brake valve through a parking brake pipeline, and is used to control the connection and disconnection between the fifth air inlet and the fourth air outlet. The fifth air inlet is connected to the parking air cylinder through a second connecting pipeline, the fourth air outlet is connected to the brake through a parking brake pipeline, and the third exhaust port is connected to the external space. Either the fifth air inlet or the third exhaust port can be connected to the fourth air outlet.

[0019] In a second aspect, the present invention provides a control method for temporarily enhancing hill-holding capability, characterized in that it comprises the following steps:

[0020] Providing the control device capable of temporarily enhancing the hill-holding capability;

[0021] Put the handbrake valve in the parking position;

[0022] Depress the brake pedal and then release it, and the vehicle will be in a state of temporarily enhanced hill-holding ability.

[0023] In conjunction with the second aspect, in one embodiment, after the vehicle is in the temporarily enhanced hill-holding capability state, the following steps are further included:

[0024] The vehicle's temporarily enhanced hill-holding ability status is released.

[0025] In one embodiment, the vehicle releases the temporarily enhanced hill-holding capability state by:

[0026] Adjust the handbrake valve to the driving position.

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] The present invention is based on the existing two independent circuits for controlling the service brake and the parking brake respectively. A one-way valve and an exhaust valve are provided on the service brake pipeline between the first relay valve and the foot brake valve. When the hand brake valve is in the driving position, the exhaust valve opens to exhaust the control port of the first relay valve. When the hand brake valve is in the parking position, the exhaust valve closes. Compared with the existing method of temporarily enhancing the hill-holding ability, the control device for temporarily enhancing the hill-holding ability, in the parking state, when the driver steps on the brake pedal, the gas in the second service air reservoir flows into the first relay valve through the foot brake valve, thereby connecting to the channel in the first relay valve, so that the gas in the first service air reservoir flows into the brake through the first relay valve, inflating the service brake chamber, thereby superimposing the service brake on the vehicle, so that the vehicle's hill-holding ability is temporarily enhanced; when the brake pedal is released, due to the characteristics of the one-way valve and the closure of the exhaust valve, the gas in the control port of the first relay valve will not be discharged, so that the channel in the first relay valve is always connected, so that even if the brake pedal is no longer stepped on, the vehicle can superimpose the service brake, so that the vehicle's hill-holding ability can be temporarily enhanced when the driver's foot leaves the service brake pedal. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the structure of a control device capable of temporarily enhancing hill-holding capability according to an embodiment of the present invention.

[0030] In the figure: 1-first driving air reservoir, 2-foot brake valve, 3-one-way valve, 4-reverse stop valve, 5-first relay valve, 6-brake, 7-parking air reservoir, 8-second relay valve, 9-hand brake valve, 10-second driving air reservoir, 11-first air inlet, 12-second air inlet, 13-third air inlet, 14-fourth air inlet, 15-fifth air inlet, 16-sixth air inlet, 17-seventh air inlet, 21-first air outlet, 22-second air outlet, 23-third air outlet, 24-fourth air outlet, 25-fifth air outlet, 26-sixth air outlet, 31-first exhaust port, 32-second exhaust port, 33-third exhaust port, 34-fourth exhaust port, 41-first control port, 42-second control port, 43-third control port. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0032] The control device for temporarily enhancing the hill-holding capability in the embodiment of the present invention is described in detail in the following manner: Figure 1 As shown, it includes a service brake pipeline, which includes a service brake pipeline, and a second service air cylinder 10, a foot brake valve 2, a one-way valve 3, a first relay valve 5 and a brake 6 connected in sequence through the service brake pipeline; it also includes a parking brake pipeline, which includes a parking brake pipeline, and a parking air cylinder 7, a hand brake valve 9, a second relay valve 8 and a brake 6 connected in sequence through the parking brake pipeline; the first relay valve 5 is connected to the first service air cylinder 1 through a first connecting pipeline; the parking air cylinder 7 and the second relay valve 8 are connected through a second connecting pipeline; an exhaust valve, when the hand brake valve 9 is in the driving position, the exhaust valve is opened to exhaust the control port of the first relay valve 5; when the hand brake valve 9 is in the parking position, the exhaust valve is closed. If there is gas in the control port of the first relay valve 5 at this time, the gas cannot be discharged.

[0033] It can be seen from this that, based on the existing two independent circuits for controlling the service brake and the parking brake respectively, the present invention provides a one-way valve 3 on the service brake pipeline between the first relay valve 5 and the foot brake valve 2, and is provided with an exhaust valve. When the hand brake valve 9 is in the driving position, the exhaust valve opens to exhaust the control port of the first relay valve 5; when the hand brake valve 9 is in the parking position, the exhaust valve closes. Compared with the existing method of temporarily enhancing the hill-holding ability, the control device for temporarily enhancing the hill-holding ability is configured such that when the vehicle is parked, the driver depresses the brake pedal, and the gas in the second service air cylinder 10 flows into the first relay valve 5 through the foot brake valve 2, thereby connecting the channel in the first relay valve 5, so that the gas in the first service air cylinder 1 flows into the brake 6 through the first relay valve 5, inflating the service brake chamber, thereby superimposing the service brake on the vehicle and temporarily enhancing the hill-holding ability of the vehicle; when the brake pedal is released, due to the characteristics of the one-way valve 3 and the closure of the exhaust valve, the gas in the control port of the first relay valve 5 will not be discharged, so that the channel in the first relay valve 5 is always connected, so that even if the brake pedal is no longer depressed, the vehicle can superimpose the service brake, so that the vehicle can temporarily enhance the hill-holding ability when the driver's foot leaves the service brake pedal.

[0034] Preferably, see Figure 1 As shown, a specific structure of a foot brake valve 2 is provided:

[0035] The foot brake valve 2 includes a fourth air inlet 14, a third air outlet 23 and a second exhaust port 32. The fourth air inlet 14 is connected to the second service air cylinder 10 through the service brake pipeline, the third air outlet 23 is connected to the one-way valve 3 through the service brake pipeline, and the second exhaust port 32 is connected to the external space. The fourth air inlet 14 and the second exhaust port 32 can be selectively connected to the third air outlet 23. When the brake pedal is pressed, service braking is performed, and the fourth air inlet 14 is connected to the third air outlet 23. When the brake pedal is not pressed, the second exhaust port 32 is connected to the third air outlet 23.

[0036] Working process: when the brake pedal is pressed, the fourth air inlet 14 is connected with the third air outlet 23, and the gas in the second driving air cylinder 10 flows to the one-way valve 3 through the fourth air inlet 14 and the third air outlet 23; when the brake pedal is not pressed, the second exhaust port 32 is connected with the third air outlet 23, and the gas flowing into the third air outlet 23 is discharged to the outside from the second exhaust port 32.

[0037] Preferably, see Figure 1 As shown, a specific structure of an exhaust valve is provided:

[0038] The exhaust valve includes a reverse stop valve 4, a third connecting pipeline, a fourth connecting pipeline, a third air outlet 23 and a second exhaust port 32. The reverse stop valve 4 is connected in parallel with the one-way valve 3 through the third connecting pipeline. The gas at the control port of the first relay valve 5 is discharged through the third connecting pipeline, the reverse stop valve 4, the third air outlet 23 and the second exhaust port 32. The reverse stop valve 4 is connected to the hand brake valve 9 through the fourth connecting pipeline.

[0039] For further information, see Figure 1 As shown, the reverse stop valve 4 includes a first air inlet 11, a first air outlet 21 and a first control port 41. The first control port 41 is connected to the hand brake valve 9 through a fourth connecting pipe. The first air inlet 11 and the first air outlet 21 are respectively connected to the service brake pipes on both sides of the one-way valve 3 through a third connecting pipe. The first control port 41 is used to control the connection and disconnection between the first air inlet 11 and the first air outlet 21.

[0040] Working process: When the hand brake valve 9 is in the driving position, the gas in the parking air cylinder 7 flows into the first control port 41 of the reverse stop valve 4 through the hand brake valve 9, thereby controlling the communication between the first air inlet 11 and the first air outlet 21. If the brake pedal is pressed, the gas in the foot brake valve 2 can flow to the first relay valve 5 through the first air inlet 11 and the first air outlet 21. If the brake pedal is not pressed, the gas in the first relay valve 5 can flow to the foot brake valve 2 through the first air outlet 21 and the first air inlet 11, and then The gas is discharged from the second exhaust port 32 of the valve 2; when the hand brake valve 9 is in the parking position, the gas in the first control port 41 of the reverse shut-off valve 4 is discharged from the hand brake valve 9. At this time, the first air inlet 11 and the first air outlet 21 are disconnected. If the brake pedal is pressed, the gas in the second service air cylinder 10 flows into the first relay valve 5 through the foot brake valve 2 and the one-way valve 3. If the brake pedal is not pressed, the gas in the first relay valve 5 cannot be discharged due to the one-way valve 3 and the disconnection between the first air inlet 11 and the first air outlet 21.

[0041] Preferably, another specific structure of the exhaust valve is provided:

[0042] The exhaust valve includes a hand brake valve sensor, an exhaust component and a fifth connecting pipeline. The exhaust component is connected to the control port of the first relay valve 5 through the fifth connecting pipeline. The hand brake valve sensor is used to determine the position state of the hand brake valve 9, wherein the position state includes the parking position and the driving position. When the hand brake valve 9 is in the driving position, the exhaust component is opened to exhaust the control port of the first relay valve 5. When the hand brake valve 9 is in the parking position, the exhaust component is closed, and the gas in the control port of the first relay valve 5 cannot be discharged.

[0043] Preferably, see Figure 1 As shown, a specific structure of a brake 6 is provided:

[0044] The brake 6 further includes two second air inlets 12 . The service brake chamber of the brake 6 is connected to the first relay valve 5 via one of the second air inlets 12 , and the parking brake chamber of the brake 6 is connected to the second relay valve 8 via the other second air inlet 12 .

[0045] It should be noted that the foot brake valve 2 and the hand brake valve 9 affect the service brake chamber and the parking brake chamber in the brake 6 respectively; when the service brake is applied, the service brake chamber in the brake 6 is inflated, and when the service brake is not applied, the service brake chamber in the brake 6 is exhausted and released; when the parking brake is applied, the parking brake chamber in the brake 6 is opened, and when the parking brake is not applied, the parking brake chamber in the brake 6 is compressed.

[0046] Preferably, see Figure 1 As shown, a specific structure of a first relay valve 5 is provided:

[0047] The first relay valve 5 includes a second control port 42, a third air inlet 13, a second air outlet 22 and a first exhaust port 31. The second control port 42 is connected to the one-way valve 3 through a service brake pipeline, and is used to control the connection and disconnection between the third air inlet 13 and the second air outlet 22. The third air inlet 13 is connected to the first service air cylinder 1 through a first connecting pipeline, the second air outlet 22 is connected to the brake 6 through a service brake pipeline, and the first exhaust port 31 is connected to the external space. Either the third air inlet 13 or the first exhaust port 31 can be connected to the second air outlet 22.

[0048] Working process: When the hand brake valve 9 is in the driving position, the exhaust valve is opened. If the brake pedal is pressed, the gas in the foot brake valve 2 can flow to the second control port 42 of the first relay valve 5 through the one-way valve 3, thereby controlling the communication between the third air inlet 13 and the second air outlet 22. The gas in the first driving air reservoir 1 can flow into the brake 6 through the third air inlet 13 and the second air outlet 22. If the brake pedal is not pressed, the gas in the second control port 42 of the first relay valve 5 can be discharged through the exhaust valve; when the hand brake valve 9 is in the parking position, the exhaust valve is closed. If the brake pedal is pressed, the gas in the foot brake valve 2 can flow to the second control port 42 of the first relay valve 5 through the one-way valve 3. Brake pedal, the gas in the second service air cylinder 10 flows into the second control port 42 of the first relay valve 5 through the foot brake valve 2 and the one-way valve 3, thereby controlling the communication between the third air inlet 13 and the second air outlet 22. The gas in the first service air cylinder 1 can flow into the brake 6 through the third air inlet 13 and the second air outlet 22. If the brake pedal is not pressed, the gas in the first relay valve 5 cannot be discharged because the one-way valve 3 and the exhaust valve are closed. Therefore, the gas in the first service air cylinder 1 can always flow into the brake 6 through the third air inlet 13 and the second air outlet 22.

[0049] Preferably, see Figure 1 As shown, a specific structure of a second relay valve 8 is provided:

[0050] The second relay valve 8 includes a third control port 43, a fifth air inlet 15, a fourth air outlet 24 and a third exhaust port 33. The third control port 43 is connected to the hand brake valve 9 through a parking brake pipeline, and is used to control the connection and disconnection between the fifth air inlet 15 and the fourth air outlet 24. The fifth air inlet 15 is connected to the parking air cylinder 7 through a second connecting pipeline, the fourth air outlet 24 is connected to the brake 6 through a parking brake pipeline, and the third exhaust port 33 is connected to the external space. Either the fifth air inlet 15 or the third exhaust port 33 can be connected to the fourth air outlet 24.

[0051] Preferably, see Figure 1 As shown, a specific structure of a hand brake valve 9 is provided:

[0052] The hand brake valve 9 includes a sixth air inlet 16, a fifth air outlet 25 and a fourth exhaust port 34. The sixth air inlet 16 is connected to the parking air cylinder 7, the fifth air outlet 25 is connected to the second relay valve 8, and it is connected to the first control port 41. The fourth exhaust port 34 is connected to the external space. Either the sixth air inlet 16 or the fourth exhaust port 34 can be connected to the fifth air outlet 25.

[0053] Working process: When the hand brake valve 9 is in the driving position, the gas in the parking air cylinder 7 flows into the first control port 41 of the reverse stop valve 4 through the sixth air inlet 16 of the hand brake valve 9 and the parking air cylinder 7, thereby controlling the communication between the first air inlet 11 and the first air outlet 21. At the same time, the spring chamber in the brake 6 connected to the hand brake valve 9 through the parking brake pipeline is compressed; when the hand brake valve 9 is in the parking position, the gas in the first control port 41 of the reverse stop valve 4 is discharged from the fifth air outlet 25 and the fourth exhaust port 34 of the hand brake valve 9. At this time, the first air inlet 11 and the first air outlet 21 are disconnected. At the same time, the spring chamber in the brake 6 connected to the hand brake valve 9 through the parking brake pipeline is opened.

[0054] The control method for temporarily enhancing hill-holding capability in an embodiment of the present invention comprises the following steps:

[0055] Provide a control device that can temporarily enhance the hill-holding ability;

[0056] Put the handbrake valve 9 in the parking position;

[0057] At this time, the gas in the first control port 41 of the reverse cut-off valve 4 is discharged from the fifth air outlet 25 and the fourth exhaust port 34 of the hand brake valve 9. At this time, the first air inlet 11 and the first air outlet 21 are disconnected. At the same time, the spring chamber in the brake 6, which is connected to the hand brake valve 9 through the parking brake pipeline, opens.

[0058] Depress the brake pedal and then release it, the vehicle will be in a state of temporarily enhanced hill-holding ability;

[0059] At this time, the brake pedal is depressed, and the gas in the second service air cylinder 10 flows into the second control port 42 of the first relay valve 5 through the foot brake valve 2 and the one-way valve 3, thereby controlling the communication between the third air inlet 13 and the second air outlet 22. The gas in the first service air cylinder 1 can flow into the brake 6 through the third air inlet 13 and the second air outlet 22, so that the service brake chamber in the brake 6 connected to the first relay valve 5 through the service brake pipeline is inflated, so that the vehicle is in a state of temporarily enhanced hill-holding ability; when the brake pedal is released, the gas in the first relay valve 5 cannot be discharged because the one-way valve 3 and the exhaust valve are closed. Therefore, the gas in the first service air cylinder 1 can always flow into the brake 6 through the third air inlet 13 and the second air outlet 22, and the vehicle is still in a state of temporarily enhanced hill-holding ability.

[0060] It can be seen from this that, based on the existing two independent circuits for controlling the service brake and the parking brake respectively, the present invention provides a one-way valve 3 on the service brake pipeline between the first relay valve 5 and the foot brake valve 2, and is provided with an exhaust valve. When the hand brake valve 9 is in the driving position, the exhaust valve opens to exhaust the control port of the first relay valve 5; when the hand brake valve 9 is in the parking position, the exhaust valve closes. Compared with the existing method of temporarily enhancing the hill-holding ability, the control device for temporarily enhancing the hill-holding ability is configured such that when the vehicle is parked, the driver depresses the brake pedal, and the gas in the second service air cylinder 10 flows into the first relay valve 5 through the foot brake valve 2, thereby connecting the channel in the first relay valve 5, so that the gas in the first service air cylinder 1 flows into the brake 6 through the first relay valve 5, inflating the service brake chamber, thereby superimposing the service brake on the vehicle and temporarily enhancing the hill-holding ability of the vehicle; when the brake pedal is released, due to the characteristics of the one-way valve 3 and the closure of the exhaust valve, the gas in the control port of the first relay valve 5 will not be discharged, so that the channel in the first relay valve 5 is always connected, so that even if the brake pedal is no longer depressed, the vehicle can superimpose the service brake, so that the vehicle can temporarily enhance the hill-holding ability when the driver's foot leaves the service brake pedal.

[0061] Preferably, the vehicle releases the temporary enhanced hill-holding ability state.

[0062] Furthermore, the vehicle releases the temporary enhanced hill-holding capability state, specifically including:

[0063] Adjust the handbrake valve 9 to the driving position;

[0064] The working principle is as follows: the gas in the parking air cylinder 7 flows into the first control port 41 of the reverse shut-off valve 4 through the sixth air inlet 16 of the hand brake valve 9 and the parking air cylinder 7, thereby controlling the communication between the first air inlet 11 and the first air outlet 21. If the brake pedal is not pressed, the gas in the second control port 42 of the first relay valve 5 can flow to the foot brake valve 2 through the first air outlet 21 and the first air inlet 11, and be discharged from the second exhaust port 32 of the foot brake valve 2, thereby disconnecting the third air inlet 13 and the second air outlet 22, and the gas in the brake 6 is discharged through the second air outlet 22 and the first exhaust port 31, thereby releasing the temporary enhanced hill-holding ability state.

[0065] Example 1

[0066] The control device for temporarily enhancing hill-holding ability in an embodiment of the present invention includes a service brake pipeline, which includes a service brake pipeline, and a second service air reservoir 10, a foot brake valve 2, a one-way valve 3, a first relay valve 5 and a brake 6 connected in sequence through the service brake pipeline; and also includes a parking brake pipeline, which includes a parking brake pipeline, and a parking air reservoir 7, a hand brake valve 9, a second relay valve 8 and a brake 6 connected in sequence through the parking brake pipeline; the first relay valve 5 is connected to the first service air reservoir 1 through a first connecting pipeline; the parking air reservoir 7 and the second relay valve 8 are connected through a second connecting pipeline; an exhaust valve, when the hand brake valve 9 is in the driving position, the exhaust valve is opened to exhaust the air from the control port of the first relay valve 5; when the hand brake valve 9 is in the parking position, the exhaust valve is closed. If there is gas in the control port of the first relay valve 5 at this time, the gas cannot be discharged.

[0067] The foot brake valve 2 includes a fourth air inlet 14, a third air outlet 23 and a second exhaust port 32. The fourth air inlet 14 is connected to the second service air cylinder 10 through the service brake pipeline, the third air outlet 23 is connected to the one-way valve 3 through the service brake pipeline, and the second exhaust port 32 is connected to the external space. The fourth air inlet 14 and the second exhaust port 32 can be selectively connected to the third air outlet 23. When the brake pedal is pressed, service braking is performed, and the fourth air inlet 14 is connected to the third air outlet 23. When the brake pedal is not pressed, the second exhaust port 32 is connected to the third air outlet 23.

[0068] The exhaust valve includes a reverse stop valve 4, a third connecting pipeline, a fourth connecting pipeline, a third air outlet 23 and a second exhaust port 32. The reverse stop valve 4 is connected in parallel with the one-way valve 3 through the third connecting pipeline. The gas at the control port of the first relay valve 5 is discharged through the third connecting pipeline, the reverse stop valve 4, the third air outlet 23 and the second exhaust port 32. The reverse stop valve 4 is connected to the hand brake valve 9 through the fourth connecting pipeline; the reverse stop valve 4 includes a first air inlet 11, a first air outlet 21 and a first control port 41. The first control port 41 is connected to the hand brake valve 9 through the fourth connecting pipeline. The first air inlet 11 and the first air outlet 21 are respectively connected to the service brake pipelines on both sides of the one-way valve 3 through the third connecting pipeline. The first control port 41 is used to control the connection and disconnection between the first air inlet 11 and the first air outlet 21.

[0069] The brake 6 further includes two second air inlets 12 . The service brake chamber of the brake 6 is connected to the first relay valve 5 via one of the second air inlets 12 , and the parking brake chamber of the brake 6 is connected to the second relay valve 8 via the other second air inlet 12 .

[0070] The first relay valve 5 includes a second control port 42, a third air inlet 13, a second air outlet 22 and a first exhaust port 31. The second control port 42 is connected to the one-way valve 3 through a service brake pipeline, and is used to control the connection and disconnection between the third air inlet 13 and the second air outlet 22. The third air inlet 13 is connected to the first service air cylinder 1 through a first connecting pipeline, the second air outlet 22 is connected to the brake 6 through a service brake pipeline, and the first exhaust port 31 is connected to the external space. Either the third air inlet 13 or the first exhaust port 31 can be connected to the second air outlet 22.

[0071] The second relay valve 8 includes a third control port 43, a fifth air inlet 15, a fourth air outlet 24 and a third exhaust port 33. The third control port 43 is connected to the hand brake valve 9 through a parking brake pipeline, and is used to control the connection and disconnection between the fifth air inlet 15 and the fourth air outlet 24. The fifth air inlet 15 is connected to the parking air cylinder 7 through a second connecting pipeline, the fourth air outlet 24 is connected to the brake 6 through a parking brake pipeline, and the third exhaust port 33 is connected to the external space. Either the fifth air inlet 15 or the third exhaust port 33 can be connected to the fourth air outlet 24.

[0072] The hand brake valve 9 includes a sixth air inlet 16, a fifth air outlet 25 and a fourth exhaust port 34. The sixth air inlet 16 is connected to the parking air cylinder 7, the fifth air outlet 25 is connected to the second relay valve 8, and it is connected to the first control port 41. The fourth exhaust port 34 is connected to the external space. Either the sixth air inlet 16 or the fourth exhaust port 34 can be connected to the fifth air outlet 25.

[0073] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0074] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0075] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A control device capable of temporarily enhancing hill-holding capability, characterized in that: It includes: A service brake line, comprising a service brake line, and a second service air reservoir (10), a foot brake valve (2), a one-way valve (3), a first relay valve (5), and a brake (6) connected in sequence through the service brake line; A parking brake line, comprising a parking brake line, and a parking air reservoir (7), a hand brake valve (9), a second relay valve (8), and a brake (6) connected in sequence through the parking brake line; A first driving air reservoir (1) connected to a first relay valve (5) via a first connecting pipeline; a second connecting pipeline connected between the parking air reservoir (7) and the second relay valve (8); An exhaust valve, when the hand brake valve (9) is in the driving position, the exhaust valve opens to exhaust the air from the control port of the first relay valve (5); when the hand brake valve (9) is in the parking position, the exhaust valve closes; The foot brake valve (2) comprises a fourth air inlet (14), a third air outlet (23) and a second exhaust port (32); the fourth air inlet (14) is connected to the second driving air reservoir (10) through a driving brake pipeline; the third air outlet (23) is connected to the one-way valve (3) through the driving brake pipeline; the second exhaust port (32) is connected to the external space; and either the fourth air inlet (14) or the second exhaust port (32) can be connected to the third air outlet (23); The exhaust valve comprises a reverse stop valve (4), a third connecting pipeline, a fourth connecting pipeline, a third air outlet (23) and a second exhaust port (32); the reverse stop valve (4) is connected in parallel with the one-way valve (3) via the third connecting pipeline; the gas at the control port of the first relay valve (5) is discharged via the third connecting pipeline, the reverse stop valve (4), the third air outlet (23) and the second exhaust port (32); and the reverse stop valve (4) is connected to the hand brake valve (9) via the fourth connecting pipeline.

2. The control device for temporarily enhancing hill-holding capability according to claim 1, characterized in that: The reverse stop valve (4) comprises a first air inlet (11), a first air outlet (21) and a first control port (41); the first control port (41) is connected to the hand brake valve (9) via a fourth connecting line; the first air inlet (11) and the first air outlet (21) are respectively connected to the service brake lines on both sides of the one-way valve (3) via a third connecting line; the first control port (41) is used to control the connection and disconnection between the first air inlet (11) and the first air outlet (21).

3. The control device for temporarily enhancing hill-holding capability according to claim 1, characterized in that: The brake (6) further comprises two second air inlets (12), the service brake chamber of the brake (6) being connected to the first relay valve (5) via one of the second air inlets (12), and the parking brake chamber of the brake (6) being connected to the second relay valve (8) via the other of the second air inlets (12).

4. The control device for temporarily enhancing hill-holding capability according to claim 1, characterized in that: The first relay valve (5) comprises a second control port (42), a third air inlet (13), a second air outlet (22) and a first exhaust port (31). The second control port (42) is connected to the one-way valve (3) via a service brake pipeline and is used to control the connection and disconnection between the third air inlet (13) and the second air outlet (22). The third air inlet (13) is connected to the first service air reservoir (1) via a first connecting pipeline, the second air outlet (22) is connected to the brake (6) via the service brake pipeline, and the first exhaust port (31) is connected to the external space. Either the third air inlet (13) or the first exhaust port (31) can be connected to the second air outlet (22).

5. The control device for temporarily enhancing hill-holding capability according to claim 1, characterized in that: The second relay valve (8) includes a third control port (43), a fifth air inlet (15), a fourth air outlet (24) and a third exhaust port (33). The third control port (43) is connected to the hand brake valve (9) through a parking brake pipeline and is used to control the connection and disconnection between the fifth air inlet (15) and the fourth air outlet (24). The fifth air inlet (15) is connected to the parking air reservoir (7) through a second connecting pipeline, the fourth air outlet (24) is connected to the brake (6) through the parking brake pipeline, and the third exhaust port (33) is connected to the external space. Either the fifth air inlet (15) or the third exhaust port (33) can be connected to the fourth air outlet (24).

6. A control method for temporarily enhancing hill-holding capability, characterized in that: It includes the following steps: A control device capable of temporarily enhancing hill-holding capability as claimed in any one of claims 1 to 5 is provided; Put the handbrake valve (9) in the parking position; Depress the brake pedal and then release it, and the vehicle will be in a state of temporarily enhanced hill-holding ability.

7. The control method for temporarily enhancing hill-holding capability according to claim 6, characterized in that: After the vehicle is in the temporarily enhanced hill-holding capability state, the following steps are also included: The vehicle's temporarily enhanced hill-holding ability status is released.

8. The control method for temporarily enhancing hill-holding capability according to claim 7, characterized in that: The vehicle is released from the temporary enhanced hill-holding ability state, specifically including: Adjust the handbrake valve (9) to the driving position.

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