On-off type hydraulic retarder control method and device and computer equipment

Abstract

The invention relates to an on-off type hydraulic retarder control method and device and computer equipment. A slope signal, an accelerator pedal signal, a brake pedal signal and a vehicle speed signal are analyzed and judged through an on-off type hydraulic retarder control unit, and working condition mode recognition is conducted; the on-off type hydraulic retarder control unit recognizes the corresponding working condition and judges that the on-off type hydraulic retarder is to be used; the on-off type hydraulic retarder control unit controls the on-off gear shifting executing mechanism to be combined in advance, so that the on-off type hydraulic retarder has power input; when a driver opens the on-off type hydraulic retarder control handle, the on-off type hydraulic retarder can work rapidly to generate braking force, and the braking force response time of the on-off type hydraulic retarder is guaranteed. The use scene of the retarder is pre-judged through the on-off type hydraulic retarder control unit, the on-off mechanism is combined to enable the retarder to have input power, and the corresponding time of the on-off type hydraulic retarder is shortened.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic retarders, and in particular to an on-off hydraulic retarder control method, device and computer equipment. Background Art

[0002] The number of hydraulic retarders installed on domestic heavy-duty commercial vehicles is gradually increasing. They have become standard equipment in mountainous areas of Yunnan and Guizhou. The working principle of the hydraulic retarder is that the rotation of the rotor drives the liquid medium inside the working chamber to rotate. The rotating liquid reacts to the rotor through the stator to generate a reverse braking force, which is ultimately transferred to the wheel through the rotating shaft to slow it down. However, the traditional hydraulic retarder has a rotor that is always rotating when not in operation. Although there is no liquid medium in the working chamber, the hydraulic retarder still generates a small amount of no-load loss due to the presence of air, which increases the fuel consumption of the vehicle.

[0003] With the development of hydraulic retarder technology, on-off hydraulic retarder technology has emerged. The on-off hydraulic retarder has the same connection position as the traditional hydraulic retarder, both of which are connected to the rear end of the transmission. The gears on the transmission output shaft and the gears on the hydraulic retarder input shaft adopt a constant meshing structure, but no power is input to the hydraulic retarder in the default state.

[0004] In traditional technology, when the hydraulic retarder needs to work, the retarder control unit controls the cylinder to combine with the solenoid valve to intake air, and the cylinder pushes the shift fork to engage the synchronizer. Only when the synchronizer is engaged, the retarder has input power.

[0005] However, the disadvantage of the current solution is that it will increase the response time of the retarder, that is, if you want to make the retarder work, you must first control the cylinder to engage the synchronizer, and the synchronizer engagement requires a certain amount of time. Only after the synchronizer engagement power is input can the retarder work to generate braking force. Summary of the invention

[0006] Based on this, it is necessary to provide an on-off hydraulic retarder control method, device and computer equipment that can predict the use scenario of the retarder through an on-off hydraulic retarder control unit, combine the on-off mechanism so that the retarder has input power, and shorten the response time of the on-off hydraulic retarder to address the above technical problems.

[0007] First, the present application provides an on-off hydraulic retarder control method, the control method comprising the following steps:

[0008] The on-off hydraulic retarder control unit analyzes and judges the slope signal, accelerator pedal signal, brake pedal signal and vehicle speed signal to identify the working mode;

[0009] The on-off hydraulic retarder control unit identifies the appropriate working conditions and determines that the on-off hydraulic retarder will be used; the on-off hydraulic retarder control unit controls the on-off shift actuator to engage in advance, so that the on-off hydraulic retarder has power input;

[0010] When the driver turns on the on-off hydraulic retarder control handle, the on-off hydraulic retarder can work quickly to generate braking force, ensuring the braking force response time of the on-off hydraulic retarder.

[0011] The on-off hydraulic retarder control unit obtains the vehicle brake pedal signal, accelerator pedal signal, slope signal and vehicle speed signal through the CAN bus, and the on-off hydraulic retarder collects the handle switch signal;

[0012] When the on-off hydraulic retarder handle switch signal is in the off state, the on-off hydraulic retarder control mode is turned on; when the on-off hydraulic retarder handle switch signal is in the on state, the on-off hydraulic retarder control mode is turned off.

[0013] The on-off hydraulic retarder control unit judges the collected slope signal. When the slope signal is greater than 2% and the duration is greater than 3s, the on-off hydraulic retarder control unit determines that the current working condition is in compliance with the working condition. The on-off hydraulic retarder control unit determines that the vehicle is currently on a long downhill section and is ready to start the on-off hydraulic retarder.

[0014] The on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear mesh with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state;

[0015] During this process, if the on-off hydraulic retarder handle signal is activated, the on-off hydraulic retarder control unit controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts working to generate braking force.

[0016] The on-off hydraulic retarder control unit judges the collected slope signal. When the slope is ≤0% and the duration is >2s, and the on-off hydraulic retarder handle signal is in the off state, the on-off hydraulic retarder control unit judges that the current working condition is not in compliance with the working condition;

[0017] The on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to be turned on, and controls the cylinder to drive the shift fork to make the input end gear of the on-off hydraulic retarder and the output end gear of the transmission exit the meshing state, and the input power of the on-off hydraulic retarder is in an interrupted state.

[0018] The on-off hydraulic retarder control unit judges the collected accelerator pedal signal. When the accelerator pedal opening signal = 0 and the duration is greater than 2s, the on-off hydraulic retarder control unit judges that the current working condition is a conforming working condition;

[0019] The on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear mesh with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state;

[0020] During this process, if the on-off hydraulic retarder handle signal is activated, the on-off hydraulic retarder control unit controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts working to generate braking force.

[0021] The on-off hydraulic retarder control unit judges the collected accelerator pedal signal. When the throttle opening is ≠0 and the on-off hydraulic retarder handle signal is in the off state, the on-off hydraulic retarder control unit judges that the current working condition is not in compliance with the working condition;

[0022] The on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to be turned on, and controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear and the transmission output end gear exit the meshing state, and the on-off hydraulic retarder input power is in an interrupted state.

[0023] The on-off hydraulic retarder control unit judges the collected brake pedal signal. When the brake pedal opening signal = 1, the on-off hydraulic retarder control unit judges that the current working condition is a conforming working condition;

[0024] The on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear mesh with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state;

[0025] When the on-off hydraulic retarder input end gear meshes with the transmission output end gear, the on-off hydraulic retarder control unit immediately controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts to work to generate braking force to assist the main brake and slow down the vehicle;

[0026] Until the brake pedal opening signal = 0, the on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to turn on, and controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear and the transmission output end gear exit the meshing state, the power is interrupted, and the proportional valve is closed at the same time to stop the on-off hydraulic retarder from working.

[0027] In a second aspect, the present application further provides an on-off hydraulic retarder control device, the device comprising:

[0028] transmission;

[0029] The on-off hydraulic retarder is connected to the rear end of the transmission. The gear on the transmission output shaft and the gear on the on-off hydraulic retarder input shaft adopt a constant meshing structure. In the default state, no power is input to the on-off hydraulic retarder.

[0030] The on-off hydraulic retarder control unit is used to obtain the slope signal, accelerator pedal signal, brake pedal signal and vehicle speed signal for analysis and judgment, to identify the working condition mode, and to pre-judge that the on-off hydraulic retarder will be used for the working conditions that meet the requirements.

[0031] Thirdly, the present application further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0032] The on-off hydraulic retarder control unit analyzes and judges the slope signal, accelerator pedal signal, brake pedal signal and vehicle speed signal to identify the working mode;

[0033] The on-off hydraulic retarder control unit identifies the appropriate working conditions and determines that the on-off hydraulic retarder will be used; the on-off hydraulic retarder control unit controls the on-off shift actuator to engage in advance, so that the on-off hydraulic retarder has power input;

[0034] When the driver turns on the on-off hydraulic retarder control handle, the on-off hydraulic retarder can work quickly to generate braking force, ensuring the braking force response time of the on-off hydraulic retarder.

[0035] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the following steps are implemented:

[0036] The on-off hydraulic retarder control unit analyzes and judges the slope signal, accelerator pedal signal, brake pedal signal and vehicle speed signal to identify the working mode;

[0037] The on-off hydraulic retarder control unit identifies the appropriate working conditions and determines that the on-off hydraulic retarder will be used; the on-off hydraulic retarder control unit controls the on-off shift actuator to engage in advance, so that the on-off hydraulic retarder has power input;

[0038] When the driver turns on the on-off hydraulic retarder control handle, the on-off hydraulic retarder can work quickly to generate braking force, ensuring the braking force response time of the on-off hydraulic retarder.

[0039] The above-mentioned on-off hydraulic retarder control method, device, computer equipment, storage medium and computer program product analyze and judge the slope signal, accelerator pedal signal, brake pedal signal and vehicle speed signal through the on-off hydraulic retarder control unit, perform working condition mode recognition, pre-judge that the on-off hydraulic retarder will be used for the working conditions that meet the requirements, thereby controlling the on-off shift actuator to be combined in advance so that the on-off hydraulic retarder has power input. When the driver turns on the on-off hydraulic retarder control handle, the on-off hydraulic retarder can work quickly to generate braking force, thereby ensuring the braking force response time of the on-off hydraulic retarder. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] FIG1 is a control flow chart of an on-off hydraulic retarder control method according to an embodiment;

[0042] FIG2 is a simplified structural diagram of an on-off hydraulic retarder control method in one embodiment;

[0043] Figure 3 FIG. 1 is an electrical system connection diagram of an on-off hydraulic retarder control method in one embodiment. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0045] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0051] In one embodiment, the present invention provides an on-off hydraulic retarder control method, as shown in FIG1 and FIG2 , the control method comprises the following steps:

[0052] By analyzing and judging the slope signal, accelerator pedal signal, brake pedal signal and vehicle speed signal, the working condition mode is identified, and the on-off hydraulic retarder will be used for the working conditions that meet the requirements.

[0053] The on-off hydraulic retarder control unit obtains the vehicle's brake pedal signal, accelerator pedal signal, slope signal and vehicle speed signal through the CAN bus, and the on-off hydraulic retarder collects the handle switch signal;

[0054] When the on-off hydraulic retarder handle switch signal is in the off state, the on-off hydraulic retarder control mode is turned on; if the on-off hydraulic retarder handle switch signal is in the on state, the function is turned off;

[0055] The on-off hydraulic retarder control unit judges the collected slope signal. When the slope signal satisfies the conditions of >2% and the duration is >3s, the on-off hydraulic retarder control unit determines that the vehicle is currently on a long downhill section and is about to start the on-off hydraulic retarder.

[0056] like Figure 3 The figure shows the electrical system connection diagram of the on-off hydraulic retarder control method. The on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, and controls the cylinder to drive the shift fork to mesh the input end gear of the on-off hydraulic retarder with the output end gear of the transmission, and the input power of the on-off hydraulic retarder is in a coupled state.

[0057] If the on-off hydraulic retarder handle signal is not activated during this process, the on-off hydraulic retarder input end gear is kept meshed with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state;

[0058] If the on-off hydraulic retarder handle signal is activated during this process, the on-off hydraulic retarder control unit controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts to work and generate braking force;

[0059] The on-off hydraulic retarder control unit judges the collected slope signal. When the slope does not meet the requirement of ≤0% and the duration is >2s, it continuously monitors whether the on-off hydraulic retarder handle signal is activated.

[0060] The on-off hydraulic retarder control unit judges the collected slope signal. When the slope is ≤0% and the duration is >2s, and the on-off hydraulic retarder handle signal is in the off state, the on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to be turned on, and controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear and the transmission output end gear exit the meshing state, and the on-off hydraulic retarder input power is in the interrupted state;

[0061] The on-off hydraulic retarder control unit judges the collected accelerator pedal signal. When the accelerator pedal opening signal = 0 (i.e., the accelerator pedal is retracted) and the duration is greater than 2s, the on-off hydraulic retarder control unit judges that the driver's driving intention may be to adopt the on-off hydraulic retarder auxiliary braking. Therefore, the on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, and controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear mesh with the transmission output end gear, and the on-off hydraulic retarder input power is in a combined state;

[0062] If the on-off hydraulic retarder handle signal is not activated during this process, the on-off hydraulic retarder input end gear is kept meshed with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state;

[0063] If the on-off hydraulic retarder handle signal is activated during this process, the on-off hydraulic retarder control unit controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts to work and generate braking force;

[0064] When the throttle opening = 0, continuously monitor whether the on-off hydraulic retarder handle signal is activated;

[0065] When the throttle opening is ≠0 and the on-off hydraulic retarder handle signal is in the off state, the on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to be turned on, and controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear and the transmission output end gear exit the meshing state, and the on-off hydraulic retarder input power is in the interrupted state;

[0066] When the brake pedal opening signal = 1 (i.e. the brake pedal is pressed), the on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, and controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear mesh with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state;

[0067] When the on-off hydraulic retarder input end gear meshes with the transmission output end gear, the on-off hydraulic retarder control unit immediately controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts to work to generate braking force to assist the main brake and slow down the vehicle;

[0068] Until the brake pedal opening signal = 0 (i.e. the brake pedal is released), the on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to be turned on, and the control cylinder drives the shift fork to move so that the on-off hydraulic retarder input end gear and the transmission output end gear exit the meshing state, the power is interrupted, and the proportional valve is closed at the same time to stop the on-off hydraulic retarder from working.

[0069] The premise for judging and taking action on the above conditions is that the vehicle speed is greater than 15Km / h. If the vehicle speed is less than or equal to 15Km / h, the on-off hydraulic retarder will block all actions and stop working.

[0070] By analyzing and judging the slope signal, accelerator pedal signal, brake pedal signal and vehicle speed signal, the working condition mode is identified, and the on-off hydraulic retarder will be used for the working conditions that meet the requirements.

[0071] The on-off hydraulic retarder is connected to the rear end of the transmission. The gears on the transmission output shaft and the gears on the on-off hydraulic retarder input shaft adopt a constant meshing structure, but no power is input to the on-off hydraulic retarder in the default state. When the on-off hydraulic retarder needs to work, the on-off hydraulic retarder control unit controls the cylinder to combine the solenoid valve to intake air, and the cylinder pushes the shift fork to combine the synchronizer. Only when the synchronizer is combined, the on-off hydraulic retarder has input power.

[0072] Thereby, the on-off shift actuator is controlled to engage in advance, so that the on-off hydraulic retarder has power input. When the driver turns on the on-off hydraulic retarder control handle, the on-off hydraulic retarder can work quickly to generate braking force, thereby ensuring the braking force response time of the on-off hydraulic retarder.

[0073] In one embodiment, an on-off hydraulic retarder control device comprises:

[0074] transmission;

[0075] The on-off hydraulic retarder is connected to the rear end of the transmission. The gear on the transmission output shaft and the gear on the on-off hydraulic retarder input shaft adopt a constant meshing structure. In the default state, no power is input to the on-off hydraulic retarder.

[0076] The on-off hydraulic retarder control unit is used to obtain the slope signal, accelerator pedal signal, brake pedal signal and vehicle speed signal for analysis and judgment, to identify the working condition mode, and to pre-judge that the on-off hydraulic retarder will be used for the working conditions that meet the requirements.

[0077] In one embodiment, the present application further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0078] The on-off hydraulic retarder control unit analyzes and judges the slope signal, accelerator pedal signal, brake pedal signal and vehicle speed signal to identify the working mode;

[0079] The on-off hydraulic retarder control unit identifies the appropriate working conditions and determines that the on-off hydraulic retarder will be used; the on-off hydraulic retarder control unit controls the on-off shift actuator to engage in advance, so that the on-off hydraulic retarder has power input;

[0080] When the driver turns on the on-off hydraulic retarder control handle, the on-off hydraulic retarder can work quickly to generate braking force, ensuring the braking force response time of the on-off hydraulic retarder.

[0081] In one embodiment, when the processor executes the computer program, the following steps may also be implemented:

[0082] The on-off hydraulic retarder control unit obtains the vehicle's brake pedal signal, accelerator pedal signal, slope signal and vehicle speed signal through the CAN bus, and the on-off hydraulic retarder collects the handle switch signal;

[0083] When the on-off hydraulic retarder handle switch signal is in the off state, the on-off hydraulic retarder control mode is turned on; when the on-off hydraulic retarder handle switch signal is in the on state, the on-off hydraulic retarder control mode is turned off.

[0084] In one embodiment, when the processor executes the computer program, the following steps may also be implemented:

[0085] The on-off hydraulic retarder control unit judges the collected slope signal. When the slope signal is greater than 2% and the duration is greater than 3s, the on-off hydraulic retarder control unit determines that the current working condition is in compliance with the working condition. The on-off hydraulic retarder control unit determines that the vehicle is currently on a long downhill section and is ready to start the on-off hydraulic retarder.

[0086] The on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear mesh with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state;

[0087] During this process, if the on-off hydraulic retarder handle signal is activated, the on-off hydraulic retarder control unit controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts working to generate braking force.

[0088] In one embodiment, when the processor executes the computer program, the following steps may also be implemented:

[0089] The on-off hydraulic retarder control unit judges the collected slope signal. When the slope is ≤0% and the duration is >2s, and the on-off hydraulic retarder handle signal is in the off state, the on-off hydraulic retarder control unit judges that the current working condition is not in compliance with the working condition;

[0090] The on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to be turned on, and controls the cylinder to drive the shift fork to make the input end gear of the on-off hydraulic retarder and the output end gear of the transmission exit the meshing state, and the input power of the on-off hydraulic retarder is in an interrupted state.

[0091] In one embodiment, when the processor executes the computer program, the following steps may also be implemented:

[0092] The on-off hydraulic retarder control unit judges the collected accelerator pedal signal. When the accelerator pedal opening signal = 0 and the duration is greater than 2s, the on-off hydraulic retarder control unit judges that the current working condition is a conforming working condition;

[0093] The on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear mesh with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state;

[0094] During this process, if the on-off hydraulic retarder handle signal is activated, the on-off hydraulic retarder control unit controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts working to generate braking force.

[0095] In one embodiment, when the processor executes the computer program, the following steps may also be implemented:

[0096] The on-off hydraulic retarder control unit judges the collected accelerator pedal signal. When the throttle opening is ≠0 and the on-off hydraulic retarder handle signal is in the off state, the on-off hydraulic retarder control unit judges that the current working condition is not in compliance with the working condition;

[0097] The on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to be turned on, and controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear and the transmission output end gear exit the meshing state, and the on-off hydraulic retarder input power is in an interrupted state.

[0098] In one embodiment, when the processor executes the computer program, the following steps may also be implemented:

[0099] The on-off hydraulic retarder control unit judges the collected brake pedal signal. When the brake pedal opening signal = 1, the on-off hydraulic retarder control unit judges that the current working condition is a conforming working condition;

[0100] The on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear mesh with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state;

[0101] When the on-off hydraulic retarder input end gear meshes with the transmission output end gear, the on-off hydraulic retarder control unit immediately controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts to work to generate braking force to assist the main brake and slow down the vehicle;

[0102] Until the brake pedal opening signal = 0, the on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to turn on, and controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear and the transmission output end gear exit the meshing state, the power is interrupted, and the proportional valve is closed at the same time to stop the on-off hydraulic retarder from working.

[0103] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A control method for an on-off hydraulic retarder, characterized in that: The control method comprises the following steps: The on-off hydraulic retarder control unit analyzes and judges the slope signal, accelerator pedal signal, brake pedal signal and vehicle speed signal to identify the working mode; The on-off hydraulic retarder control unit identifies the applicable working conditions and determines that the on-off hydraulic retarder will be used; The on-off hydraulic retarder control unit controls the on-off shift actuator to engage in advance, so that the on-off hydraulic retarder has power input; When the driver turns on the on-off hydraulic retarder control handle, the on-off hydraulic retarder can work quickly to generate braking force, ensuring the braking force response time of the on-off hydraulic retarder.

2. The method according to claim 1, characterized in that The on-off hydraulic retarder control unit obtains the vehicle brake pedal signal, accelerator pedal signal, slope signal and vehicle speed signal through the CAN bus, and the on-off hydraulic retarder collects the handle switch signal; When the on-off hydraulic retarder handle switch signal is in the off state, the on-off hydraulic retarder control mode is turned on; when the on-off hydraulic retarder handle switch signal is in the on state, the on-off hydraulic retarder control mode is turned off.

3. The method according to claim 2, characterized in that The on-off hydraulic retarder control unit judges the collected slope signal. When the slope signal is greater than 2% and the duration is greater than 3s, the on-off hydraulic retarder control unit determines that the current working condition is in compliance with the working condition. The on-off hydraulic retarder control unit determines that the vehicle is currently on a long downhill section and is ready to start the on-off hydraulic retarder. The on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear mesh with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state; During this process, if the on-off hydraulic retarder handle signal is activated, the on-off hydraulic retarder control unit controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts working to generate braking force.

4. The method according to claim 3, characterized in that The on-off hydraulic retarder control unit judges the collected slope signal. When the slope is ≤0% and the duration is >2s, and the on-off hydraulic retarder handle signal is in the off state, the on-off hydraulic retarder control unit judges that the current working condition is not in compliance with the working condition; The on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to be turned on, and controls the cylinder to drive the shift fork to make the input end gear of the on-off hydraulic retarder and the output end gear of the transmission exit the meshing state, and the input power of the on-off hydraulic retarder is in an interrupted state.

5. The method according to claim 4, characterized in that The on-off hydraulic retarder control unit judges the collected accelerator pedal signal. When the accelerator pedal opening signal = 0 and the duration is greater than 2s, the on-off hydraulic retarder control unit judges that the current working condition is a conforming working condition; The on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear mesh with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state; During this process, if the on-off hydraulic retarder handle signal is activated, the on-off hydraulic retarder control unit controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts working to generate braking force.

6. The method according to claim 4, characterized in that The on-off hydraulic retarder control unit judges the collected accelerator pedal signal. When the throttle opening is ≠0 and the on-off hydraulic retarder handle signal is in the off state, the on-off hydraulic retarder control unit judges that the current working condition is not in compliance with the working condition; The on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to be turned on, and controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear and the transmission output end gear exit the meshing state, and the on-off hydraulic retarder input power is in an interrupted state.

7. The method according to any one of claims 1 to 6, characterized in that: The on-off hydraulic retarder control unit judges the collected brake pedal signal. When the brake pedal opening signal = 1, the on-off hydraulic retarder control unit judges that the current working condition is a conforming working condition; The on-off hydraulic retarder control unit controls the cylinder to connect the solenoid valve, controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear mesh with the transmission output end gear, and the on-off hydraulic retarder input power is in a coupled state; When the on-off hydraulic retarder input end gear meshes with the transmission output end gear, the on-off hydraulic retarder control unit immediately controls the proportional valve air intake, and the on-off hydraulic retarder assembly immediately starts to work to generate braking force to assist the main brake and slow down the vehicle; Until the brake pedal opening signal = 0, the on-off hydraulic retarder control unit controls the cylinder separation solenoid valve to turn on, and controls the cylinder to drive the shift fork to make the on-off hydraulic retarder input end gear and the transmission output end gear exit the meshing state, the power is interrupted, and the proportional valve is closed at the same time to stop the on-off hydraulic retarder from working.

8. An on-off hydraulic retarder control device, characterized in that: The device comprises: transmission; The on-off hydraulic retarder is connected to the rear end of the transmission. The gear on the transmission output shaft and the gear on the on-off hydraulic retarder input shaft adopt a constant meshing structure. In the default state, no power is input to the on-off hydraulic retarder. The on-off hydraulic retarder control unit is used to obtain the slope signal, accelerator pedal signal, brake pedal signal and vehicle speed signal for analysis and judgment, to identify the working condition mode, and to pre-judge that the on-off hydraulic retarder will be used for the working conditions that meet the requirements.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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