Starting auxiliary control method for manual gear automobile

Abstract

The invention discloses a starting auxiliary control method for a manual gear automobile. The starting auxiliary control method comprises the following steps that first automobile starting information is obtained; then, judging whether the vehicle has a starting demand or not based on the first vehicle starting information, and if yes, obtaining a starting rotating speed value and a starting torque value of an engine; then, based on the starting rotating speed value and the starting torque value, a starting auxiliary rotating speed increasing value and a starting auxiliary torque increasing value of the engine are obtained through calculation; and then, based on the starting auxiliary rotating speed increasing value and the starting auxiliary torque increasing value of the engine, the final starting rotating speed value and the final output torque of the engine are calculated, so that the vehicle can be successfully started, the probability of starting failure of the manual gear type of the commercial vehicle can be reduced on the basis of not increasing the cost, and the starting efficiency is improved. The starting performance of the manual gear type of the commercial vehicle and the convenience of connection operation after starting are greatly improved, and the driving feeling of a driver is improved.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and more specifically, to a manual transmission automobile starting auxiliary control method. Background Art

[0002] Manual transmission models still have a large market space in the commercial vehicle field due to their low cost, high reliability, excellent fuel consumption performance and precise control characteristics. However, the starting characteristics of manual transmission models require the driver to perform precise control to operate the brakes and clutch, which is difficult to operate. Especially for commercial vehicles, which are usually heavily loaded and have poor road conditions, starting is even more difficult. Usually, skilled drivers still need good coordination between the accelerator and the clutch to start normally.

[0003] The existing starting assistance technology solution mainly determines the starting demand and increases the speed, that is, increases the reserve torque to assist starting. There is a problem that the load suddenly increases during starting, and the torque response is not timely enough, resulting in starting failure.

[0004] Therefore, how to provide a manual transmission vehicle starting auxiliary control method has become a technical problem that needs to be solved urgently in this field. Summary of the invention

[0005] An object of the present invention is to provide a new technical solution for a manual transmission vehicle starting auxiliary control method.

[0006] According to a first aspect of the present invention, a manual transmission vehicle starting auxiliary control method is provided, comprising the following steps:

[0007] Step S100, obtaining the starting information of the first vehicle;

[0008] Step S200: determining whether the vehicle has a starting requirement based on the first vehicle starting information, and if so, obtaining a starting speed value and a starting torque value of the engine;

[0009] Step S300, based on the starting speed value and the starting torque value, calculating the starting auxiliary speed boost value and the starting auxiliary torque boost value of the engine;

[0010] Step S400: Calculate the final starting speed value and final output torque of the engine based on the starting assist speed boost value and the starting assist torque boost value of the engine.

[0011] Optionally, the first vehicle starting information includes throttle information, brake information, clutch information, gear information, vehicle speed information and environmental pressure information.

[0012] Optionally, judging whether the vehicle has a starting demand based on the first vehicle starting information means judging that the vehicle has a starting demand when throttle information, brake information, clutch information, gear information, vehicle speed information and ambient pressure information are greater than corresponding first preset values.

[0013] Optionally, in step S300, calculating the engine start assist speed increase value includes the following steps:

[0014] Step S311, obtaining a correction coefficient of vehicle speed, a gear position correction coefficient, and an air conditioning state correction coefficient;

[0015] Step S312: Calculate the start assist speed boost value based on the correction coefficient, the gear correction coefficient, and the air conditioning state correction coefficient, wherein the start assist speed boost value=start assist speed boost value*correction coefficient*gear correction coefficient*air conditioning state correction coefficient.

[0016] Optionally, in step S400, calculating the final starting speed value of the engine includes the following steps:

[0017] Step S411, obtaining the idle speed value;

[0018] Step S412: Based on the start assist speed boost value and the idle speed value, a final start speed value of the engine is calculated, wherein the final start speed value=the start assist speed boost value+the idle speed value.

[0019] Optionally, in step S300, calculating the step assist torque boost value of the engine includes the following steps:

[0020] Step S321, obtaining the engine starting set speed and the current engine speed;

[0021] Step S322: Calculate the engine speed difference based on the engine starting set speed and the current engine speed, where the engine speed difference is the current engine speed minus the engine starting set speed;

[0022] Step S323: Obtain a starting assist torque boost value based on the engine speed difference.

[0023] Optionally, in step S300, calculating the final output torque of the engine includes the following steps:

[0024] Step S421, obtaining the speed reduction rate of the engine during the starting process;

[0025] Step S422: Calculate the starting assist torque correction coefficient of the engine based on the speed reduction rate;

[0026] Step S423, calculating the starting assist compensation torque based on the starting assist torque correction coefficient and the starting assist torque boost value of the engine, where the starting assist compensation torque=starting assist torque correction coefficient*starting assist torque boost value;

[0027] Step S424, obtaining the required torque of the engine;

[0028] Step S425: Calculate the final output torque of the engine based on the required torque of the engine and the starting assist compensation torque, where the final output torque of the engine=the required torque of the engine+the starting assist compensation torque.

[0029] Optionally, after step S400, the following steps are further included:

[0030] Step S500, obtaining the starting information of the second vehicle;

[0031] Step S600: Based on the second vehicle starting information, determine whether the vehicle is successfully started; if so, start the start assist delay function; if not, execute step S200.

[0032] Optionally, the start assist delay function is to continue to maintain the final starting speed value of the engine during starting within a first preset time after starting successfully.

[0033] Optionally, after step S600, the following steps are further included:

[0034] Step S700, obtaining the driving time t after the vehicle starts successfully;

[0035] Step S800, determining whether the driving time t is greater than a first preset time, if so, exiting the start assist delay function; if not, continuing to execute the start assist delay function.

[0036] The beneficial effects of the present invention are:

[0037] The present invention first obtains the first vehicle starting information, obtains the starting speed value and the starting torque value of the engine when the vehicle has a starting demand, and calculates the starting auxiliary speed boost value and the starting auxiliary torque boost value of the engine based on the starting speed value and the starting torque value; and calculates the starting final speed value and the final output torque of the engine based on the starting auxiliary speed boost value and the starting auxiliary torque boost value of the engine, so that the vehicle can be started successfully, and the probability of starting failure of manual transmission models of commercial vehicles can be reduced without increasing costs, and the starting performance of manual transmission models of commercial vehicles and the convenience of connection operations after starting are greatly improved, thereby improving the driving experience of the driver.

[0038] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0040] Figure 1 It is a flow chart of the manual transmission vehicle starting auxiliary control method of the present invention;

[0041] Figure 2 A schematic diagram of a flow chart of calculating a start assist speed increase value according to the present invention;

[0042] Figure 3 A schematic diagram of a flow chart of calculating the speed increase value and the idle speed value to obtain the final starting speed value of the engine according to the present invention;

[0043] Figure 4 A schematic diagram of a flow chart of calculating a starting assist torque boost value of an engine according to the present invention;

[0044] Figure 5 A schematic diagram of a flow chart for calculating the final output torque of an engine according to the present invention;

[0045] Figure 6 It is a flow chart of another embodiment of the manual transmission vehicle starting auxiliary control method of the present invention;

[0046] Figure 7 The figure is a detailed flow chart of the manual transmission vehicle starting auxiliary control method of the present invention. DETAILED DESCRIPTION

[0047] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0048] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0049] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0050] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0051] like Figures 1 to 6 As shown, an embodiment of the present invention provides a manual transmission vehicle starting auxiliary control method, comprising the following steps:

[0052] Step S100, obtaining the starting information of the first vehicle;

[0053] Step S200: determining whether the vehicle has a starting requirement based on the first vehicle starting information, and if so, obtaining a starting speed value and a starting torque value of the engine;

[0054] When it is determined that the vehicle has no need to start, the vehicle does not have any instructions.

[0055] Step S300, based on the starting speed value and the starting torque value, calculating the starting auxiliary speed boost value and the starting auxiliary torque boost value of the engine;

[0056] Step S400: Calculate the final starting speed value and final output torque of the engine based on the starting assist speed boost value and the starting assist torque boost value of the engine.

[0057] The present invention first obtains the first vehicle starting information, obtains the starting speed value and the starting torque value of the engine when the vehicle has a starting demand, and calculates the starting auxiliary speed boost value and the starting auxiliary torque boost value of the engine based on the starting speed value and the starting torque value; and calculates the starting final speed value and the final output torque of the engine based on the starting auxiliary speed boost value and the starting auxiliary torque boost value of the engine, so that the vehicle can be started successfully, and the probability of starting failure of manual transmission models of commercial vehicles can be reduced without increasing costs, and the starting performance of manual transmission models of commercial vehicles and the convenience of connection operations after starting are greatly improved, thereby improving the driving experience of the driver.

[0058] In one implementation of the manual transmission vehicle starting auxiliary control method of the present invention, the first vehicle starting information includes throttle information, brake information, clutch information, gear position information, vehicle speed information and environmental pressure information.

[0059] In one embodiment of the manual transmission automobile starting assistance control method of the present invention, judging whether the vehicle has a starting demand based on the first vehicle starting information means that when the throttle information, brake information, clutch information, gear information, vehicle speed information and environmental pressure information are greater than the corresponding first preset values, it is judged that the vehicle has a starting demand.

[0060] Specifically, when the vehicle starts, the driver will step on the brakes, clutch, and accelerator, and change gears. In addition, the vehicle's speed will change, and the environmental pressure on the vehicle will also change. When the accelerator information, brake information, clutch information, gear information, vehicle speed information, and environmental pressure information are all greater than the corresponding first preset values ​​within the second preset time, it can be determined that the vehicle has a need to start.

[0061] The manual transmission automobile starting assist control method of the present invention further includes an electronic control unit (ECU), a detector, a starting assist speed controller and a starting assist torque controller, wherein the electronic control unit is electrically connected to the detector, the starting assist speed controller and the starting assist torque controller respectively.

[0062] There can be multiple detectors, which respectively detect the vehicle's throttle information, brake information, clutch information, gear information, vehicle speed information and environmental pressure information, and transmit the information to the electronic control unit. The electronic control unit receives the information and controls the operation of the start assist speed controller and the start assist torque controller.

[0063] The starting assist speed controller can calculate the motor speed to obtain the final starting speed value of the engine, and the starting assist torque controller can calculate the motor torque to obtain the final output torque of the engine.

[0064] The electronic control unit stores the start assist speed increase values ​​corresponding to different environmental pressure information, and different altitudes correspond to different start assist speed increase values. The start assist speed increase value set at high altitudes is higher.

[0065] When it is determined that the vehicle has a starting demand, the starting auxiliary speed controller can match the database of the electronic control unit according to the environmental pressure information to obtain the starting speed value.

[0066] In one embodiment of the manual transmission vehicle starting auxiliary control method of the present invention, as follows Figure 2 As shown, in step S300, calculating the engine start assist speed increase value includes the following steps:

[0067] Step S311, obtaining a correction coefficient of vehicle speed, a gear position correction coefficient, and an air conditioning state correction coefficient;

[0068] Step S312: Calculate the start assist speed boost value based on the correction coefficient, the gear correction coefficient, and the air conditioning state correction coefficient, wherein the start assist speed boost value=start assist speed boost value*correction coefficient*gear correction coefficient*air conditioning state correction coefficient.

[0069] The ‌Speed ​​Correction Factor‌ refers to the value used to correct the speed displayed on the instrument in order to more accurately reflect the actual speed of the vehicle during driving. The speed correction factor is usually used to adjust or correct the difference between the actual speed of the vehicle and the speed displayed on the instrument.

[0070] The vehicle gear correction coefficient refers to a parameter introduced when designing or adjusting the vehicle gear in order to compensate for errors in actual use or optimize performance.

[0071] The vehicle's air conditioning status correction factor refers to the correction made when calculating the design load of the air conditioning system, taking into account the impact of actual operating conditions on the capacity of the air conditioning equipment.

[0072] In one embodiment of the manual transmission vehicle starting auxiliary control method of the present invention, as follows Figure 3 As shown, in step S400, calculating the final starting speed value of the engine includes the following steps:

[0073] Step S411, obtaining the idle speed value;

[0074] Step S412: Based on the start assist speed boost value and the idle speed value, a final start speed value of the engine is calculated, wherein the final start speed value=the start assist speed boost value+the idle speed value.

[0075] Specifically, the idle speed value stored in the electronic control unit can be obtained through the start assist speed controller.

[0076] In one embodiment of the manual transmission vehicle starting auxiliary control method of the present invention, as follows Figure 4 As shown, in step S300, calculating the step assist torque boost value of the engine includes the following steps:

[0077] Step S321, obtaining the engine starting set speed and the current engine speed;

[0078] Step S322: Calculate the engine speed difference based on the engine starting set speed and the current engine speed, where the engine speed difference is the current engine speed minus the engine starting set speed;

[0079] Step S323: Obtain a starting assist torque boost value based on the engine speed difference.

[0080] Specifically, the engine speed difference is the absolute value of the current engine speed minus the engine start setting speed. The start assist speed controller can detect the current engine speed of the engine and the engine start setting speed stored in the electronic control unit.

[0081] Different starting assist torque boost values ​​corresponding to different engine speed differences are stored in the electronic control unit (ECU). When the engine speed difference is obtained, the corresponding starting assist torque boost value can be directly retrieved from the electronic control unit (ECU) through the starting assist torque controller.

[0082] In one embodiment of the manual transmission vehicle starting auxiliary control method of the present invention, in step S300, as Figure 5 As shown, calculating the final output torque of the engine includes the following steps:

[0083] Step S421, obtaining the speed reduction rate of the engine during the starting process;

[0084] Step S422: Calculate the starting assist torque correction coefficient of the engine based on the speed reduction rate;

[0085] Step S423, calculating the starting assist compensation torque based on the starting assist torque correction coefficient and the starting assist torque boost value of the engine, where the starting assist compensation torque=starting assist torque correction coefficient*starting assist torque boost value;

[0086] Step S424, obtaining the required torque of the engine;

[0087] Step S425: Calculate the final output torque of the engine based on the required torque of the engine and the starting assist compensation torque, where the final output torque of the engine=the required torque of the engine+the starting assist compensation torque.

[0088] Specifically, the starting assist torque correction coefficient refers to the coefficient used to correct the torque during the starting process to ensure that the vehicle can start smoothly under various working conditions.

[0089] After obtaining the final starting speed value and final output torque of the engine, the electronic control unit (ECU) directly controls the vehicle starting.

[0090] In one embodiment of the manual transmission vehicle starting auxiliary control method of the present invention, as follows Figure 6 and Figure 7 As shown, after step S400, the following steps are also included:

[0091] Step S500, obtaining the starting information of the second vehicle;

[0092] Step S600: Based on the second vehicle starting information, determine whether the vehicle is successfully started; if so, start the start assist delay function; if not, execute step S200.

[0093] Specifically, when the vehicle starts successfully, the throttle information, brake information, clutch information, gear information, vehicle speed information and environmental pressure information are greater than the corresponding second preset values.

[0094] In one embodiment of the manual transmission vehicle starting assistance control method of the present invention, the starting assistance delay function is to continue to maintain the final starting speed value of the engine during starting within a first preset time after the start is successful.

[0095] In one embodiment of the manual transmission vehicle starting auxiliary control method of the present invention, as follows Figure 6 and Figure 7 As shown, after step S600, the following steps are also included:

[0096] Step S700, obtaining the driving time t after the vehicle starts successfully;

[0097] Step S800, determining whether the driving time t is greater than a first preset time, if so, exiting the start assist delay function; if not, continuing to execute the start assist delay function.

[0098] Specifically, when the driving time t is greater than the first preset time, the vehicle exits the start assist delay function, and the engine speed is reduced to the idle speed value.

[0099] It should be noted that the engine speed of the vehicle may also be gradually reduced to the idle speed value within the first preset time.

[0100] Furthermore, within the first preset time, if it is determined based on the throttle information, brake information, clutch information, gear information, vehicle speed information and environmental pressure information that the driver has taken over, the assist delay function is immediately started.

[0101] The present invention performs a faster torque response during the starting process and adds a starting auxiliary delay function after the start is successful, so as to improve the starting performance of the manual transmission model of the commercial vehicle more quickly and accurately.

[0102] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A manual transmission vehicle starting auxiliary control method, characterized in that: The following steps are involved: Step S100, obtaining the starting information of the first vehicle; Step S200: determining whether the vehicle has a starting requirement based on the first vehicle starting information, and if so, obtaining a starting speed value and a starting torque value of the engine; Step S300, based on the starting speed value and the starting torque value, calculating the starting auxiliary speed boost value and the starting auxiliary torque boost value of the engine; Step S400: Calculate the final starting speed value and final output torque of the engine based on the starting assist speed boost value and the starting assist torque boost value of the engine.

2. The manual transmission vehicle starting assist control method according to claim 1, characterized in that: The first vehicle starting information includes throttle information, brake information, clutch information, gear information, vehicle speed information and environmental pressure information.

3. The manual transmission vehicle starting assist control method according to claim 2, characterized in that: Judging whether the vehicle has a starting demand based on the first vehicle starting information means judging that the vehicle has a starting demand when the throttle information, brake information, clutch information, gear information, vehicle speed information and environmental pressure information are greater than corresponding first preset values.

4. The manual transmission vehicle starting assist control method according to claim 1, characterized in that: In step S300, calculating the engine start assist speed increase value includes the following steps: Step S311, obtaining a vehicle speed correction coefficient, a gear position correction coefficient, and an air conditioning state correction coefficient; Step S312: Calculate the start assist speed boost value based on the correction coefficient, the gear correction coefficient, and the air conditioning state correction coefficient, wherein the start assist speed boost value=start assist speed boost value*correction coefficient*gear correction coefficient*air conditioning state correction coefficient.

5. The manual transmission vehicle starting assist control method according to claim 3, characterized in that: In step S400, calculating the final starting speed value of the engine includes the following steps: Step S411, obtaining the idle speed value; Step S412: Based on the start assist speed boost value and the idle speed value, a final start speed value of the engine is calculated, wherein the final start speed value=the start assist speed boost value+the idle speed value.

6. The manual transmission vehicle starting assist control method according to claim 1, characterized in that: In step S300, calculating the step assist torque boost value of the engine includes the following steps: Step S321, obtaining the engine starting set speed and the current engine speed; Step S322: Calculate the engine speed difference based on the engine start setting speed and the current engine speed, where the engine speed difference is the current engine speed minus the engine start setting speed; Step S323: Obtain a starting assist torque boost value based on the engine speed difference.

7. The manual transmission vehicle starting assist control method according to claim 6, characterized in that: In step S400, calculating the final output torque of the engine includes the following steps: Step S421, obtaining the speed reduction rate of the engine during the starting process; Step S422: Calculate the engine starting assist torque correction coefficient based on the speed reduction rate; Step S423, calculating the starting assist compensation torque based on the starting assist torque correction coefficient and the starting assist torque boost value of the engine, where the starting assist compensation torque=starting assist torque correction coefficient*starting assist torque boost value; Step S424, obtaining the required torque of the engine; Step S425: Calculate the final output torque of the engine based on the required torque of the engine and the starting assist compensation torque, where the final output torque of the engine=the required torque of the engine+the starting assist compensation torque.

8. The manual transmission vehicle starting assist control method according to claim 1, characterized in that: After step S400, the following steps are also included: Step S500, obtaining the starting information of the second vehicle; Step S600: Based on the second vehicle starting information, determine whether the vehicle is successfully started; if so, start the start assist delay function; if not, execute step S200.

9. The manual transmission vehicle starting assist control method according to claim 8, characterized in that: The start assist delay function is to continue to maintain the final starting speed value of the engine during the start within a first preset time after the start is successful.

10. The manual transmission vehicle starting auxiliary control method according to claim 8, characterized in that: After step S600, the following steps are also included: Step S700, obtaining the driving time t after the vehicle starts successfully; Step S800, determining whether the driving time t is greater than a first preset time, if so, exiting the start assist delay function; if not, continuing to execute the start assist delay function.

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