Diesel engine vehicle driving auxiliary control method

Abstract

The invention provides a diesel engine vehicle driving auxiliary control method which comprises the following steps: a starting stage control method: when a vehicle controller monitors that a vehicle gear is not in a neutral position, a clutch is stepped down, and a brake is released, the vehicle controller controls the rotating speed of an engine to be increased by a certain amplitude; the gear shifting stage control method comprises the steps that the vehicle controller judges whether a driver completes upshift or downshift operation or not according to the change of a clutch state signal and the ratio of the rotating speed of an engine to the vehicle speed, and then the vehicle controller controls the rotating speed of the engine to be increased or decreased. The method can be well suitable for auxiliary control of the diesel engine vehicle in the starting stage and the gear shifting stage, and the dynamic property and smoothness of the manual gear diesel engine vehicle in the starting stage and the gear shifting stage are effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of diesel engine vehicle control, and in particular relates to a diesel engine vehicle driving auxiliary control method. Background Art

[0002] As automotive technology becomes increasingly advanced, drivers' expectations for a more refined driving experience are also increasing. This places higher demands on vehicle power and smoothness during starting and shifting phases. Existing driver assistance control methods for starting and shifting phases are typically used on gasoline-powered vehicles. However, the control methods for diesel vehicles differ from gasoline-powered vehicles. This is because diesel vehicles use an excess air coefficient for control, and the throttle opening is unrelated to the accelerator pedal. Furthermore, diesel vehicles use compression ignition, not ignition coils. Furthermore, diesel engines are mostly used in trucks, which are heavier, especially when fully loaded, and require greater torque for starting. This makes them unsuitable for diesel vehicles.

[0003] Therefore, how to design a diesel vehicle driving assistance control method that can be better applied to the auxiliary control of the diesel vehicle starting and shifting stages, and improve the power and smoothness of manual transmission diesel vehicles in the starting and shifting stages, has become a technical problem that technicians in this field urgently need to solve. Summary of the Invention

[0004] The purpose of the present invention is to provide a diesel engine vehicle driving assistance control method to solve the above technical problems in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A diesel engine vehicle driving assistance control method includes: a starting phase control method: when a vehicle controller monitors that the vehicle gear is not in neutral and the clutch is depressed, after the brake is released, the vehicle controller controls the engine speed to increase by a certain amount;

[0007] Control method for the gear shifting phase: The vehicle controller determines whether the driver has completed the upshift or downshift operation based on the change in the clutch status signal and the ratio of the engine speed to the vehicle speed, and then the vehicle controller controls the engine speed to increase or decrease.

[0008] Preferably, in the shifting stage control method, when the clutch default state is disconnected, when the clutch state signal indicates that the clutch changes from disconnected to engaged and then to disconnected, and at the same time, based on the change in the ratio of the engine speed to the vehicle speed, it is judged whether the driver has completed the upshift or downshift operation.

[0009] Preferably, when the clutch status signal indicates that the clutch changes from disconnected to engaged and then to disconnected, if the ratio of the engine speed to the vehicle speed becomes larger, the vehicle controller reduces the engine speed; if the ratio of the engine speed to the vehicle speed becomes smaller, the vehicle controller increases the engine speed.

[0010] Preferably, in the starting phase control method, the vehicle controller controls the engine speed to increase by a certain amount by: increasing the engine speed by 245 rpm-255 rpm at the current idle speed of the vehicle.

[0011] Preferably, the current idle speed is divided into a normal idle speed and an idle speed when the air conditioner is turned on.

[0012] Preferably, the starting stage control method also includes a torque control method, and the torque control method is specifically:

[0013] During the starting process, if the vehicle controller recognizes that the vehicle starting resistance is too large, the vehicle controller increases the engine torque by controlling the engine's fuel injection amount, air intake amount, and injection timing.

[0014] Preferably, whether the vehicle starting resistance is too large is determined by the throttle opening and the vehicle acceleration.

[0015] Preferably, the specific method for determining whether the vehicle starting resistance is too large is:

[0016] When the throttle opening is greater than the set opening value, the vehicle speed is greater than 0 and less than the set speed value, and the acceleration is less than the set acceleration value, it is judged that the vehicle starting resistance is too large, and then the vehicle controller increases the fuel injection amount, increases the intake amount, and controls the injection timing in advance to increase the engine torque.

[0017] The beneficial effects of the present invention are:

[0018] The diesel engine vehicle driving assistance control method of the present invention utilizes a vehicle controller to determine the driver's starting intention and gear shifting intention, and then controls the engine speed in real time to automatically adjust to the required target, thereby being well suited for auxiliary control during the starting and gear shifting stages of the diesel engine vehicle, and further effectively improving the power and smoothness of manual transmission diesel engine vehicles during the starting and gear shifting stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments, and further describe the specific embodiments of the present invention in detail with reference to the drawings.

[0020] Figure 1 A schematic diagram of a starting phase control method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0021] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, 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.

[0022] 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.

[0023] 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 part of the specification.

[0024] 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.

[0025] like Figure 1 As shown, an embodiment of the present invention provides a diesel engine vehicle driving assistance control method, which includes: a starting phase control method: when the vehicle controller monitors that the vehicle gear is not in neutral and the clutch is depressed, after the brake is released, indicating that the driver has the intention to start, the vehicle controller controls the engine speed to increase by a certain amount;

[0026] Control method for the gear shifting phase: The vehicle controller determines whether the driver has completed the upshift or downshift operation based on the change in the clutch status signal and the ratio of the engine speed to the vehicle speed, and then the vehicle controller controls the engine speed to increase or decrease.

[0027] Furthermore, in the shifting stage control method, when the clutch default state is disconnected, when the clutch state signal indicates that the clutch changes from disconnected to engaged and then to disconnected, and at the same time, based on the change in the ratio of the engine speed to the vehicle speed, it is judged whether the driver has completed the upshift or downshift operation.

[0028] Specifically, when the clutch status signal indicates that the clutch has changed from disconnected to engaged and then to disconnected, if the ratio of the engine speed to the vehicle speed becomes larger, it indicates that the downshift operation is completed, and the vehicle controller reduces the engine speed so that the engine speed reaches the required target value; if the ratio of the engine speed to the vehicle speed becomes smaller, it indicates that the upshift operation is completed, and the vehicle controller increases the engine speed so that the engine speed reaches the required target value, thereby completing smooth gear shifting.

[0029] Furthermore, in the starting phase control method, the vehicle controller controls the engine speed to increase by a certain amount, specifically: increasing the engine speed by 245 rpm-255 rpm at the current idle speed of the vehicle, preferably by 250 rpm.

[0030] Specifically, the current idle speed is divided into a normal idle speed and an idle speed when the air conditioner is turned on. It is understandable that the normal idle speed is 750 rpm and the idle speed when the air conditioner is turned on is 950 rpm.

[0031] Furthermore, the starting phase control method also includes a torque control method, which is specifically as follows:

[0032] During the starting process, if the vehicle controller recognizes that the vehicle starting resistance is too large, the vehicle controller increases the engine torque by controlling the engine's fuel injection amount, air intake amount, and injection timing.

[0033] Preferably, whether the vehicle starting resistance is too large is determined by the throttle opening and the vehicle acceleration.

[0034] Specifically, the method for determining whether the vehicle starting resistance is too large is as follows:

[0035] When the throttle opening is greater than the set opening value, the vehicle speed is greater than 0 and less than the set speed value, and the acceleration is less than the set acceleration value, it is judged that the vehicle starting resistance is too large, that is, the vehicle is heavy or on an uphill slope. The vehicle controller then increases the fuel injection amount, increases the intake volume, and controls the injection timing in advance to increase the engine torque and reach the target value, allowing the vehicle to complete the start.

[0036] In a specific embodiment, the set throttle opening value can preferably be 5% throttle opening. Different set opening values ​​can be set for different vehicles, depending on the actual calibration. The set speed value can preferably be 5 km / h. The injection amount, intake air volume, injection timing adjustment, and set acceleration value can be set based on the actual vehicle calibration. It is understood that the target values ​​of engine speed and engine torque to be achieved after adjustment in the above control method can be set based on the actual vehicle calibration.

[0037] The diesel vehicle driving assistance control method provided by the embodiment of the present invention can be applied to diesel vehicles, and there is no need to add an additional gear sensor to the vehicle. The neutral switch signal, clutch status signal, engine speed signal, vehicle speed signal, air conditioning signal, and brake signal are used as identification conditions. The vehicle controller can judge the driver's starting and shifting intentions through the above signals, and then adjust the speed accordingly; at the same time, during the starting process, the present invention can also increase torque by controlling the injection amount, intake amount, and injection timing, without the need to press the accelerator pedal.

[0038] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood 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 should be understood by those skilled in the art that modifications may be made to the above embodiments 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 diesel engine vehicle driving assistance control method, characterized in that: It includes: Control method at the starting stage: When the vehicle controller detects that the vehicle gear is not in neutral, and When the clutch is depressed and the brake is released, the vehicle controller will control the engine speed to increase by a certain amount; Control method for the gear shifting phase: The vehicle controller determines whether the driver has completed the upshift or downshift operation based on the change in the clutch status signal and the ratio of the engine speed to the vehicle speed, and then the vehicle controller controls the engine speed to increase or decrease.

2. The diesel engine vehicle driving assistance control method according to claim 1, characterized in that: In the shifting stage control method, when the clutch default state is disconnected, when the clutch state signal indicates that the clutch changes from disconnected to engaged and then to disconnected, and at the same time, based on the change in the ratio of engine speed to vehicle speed, it is judged whether the driver has completed the upshift or downshift operation.

3. The diesel engine vehicle driving assistance control method according to claim 2, characterized in that: When the clutch status signal indicates that the clutch changes from disconnected to engaged and then to disconnected, if the ratio of the engine speed to the vehicle speed increases, the vehicle controller reduces the engine speed; if the ratio of the engine speed to the vehicle speed decreases, the vehicle controller increases the engine speed.

4. The diesel engine vehicle driving assistance control method according to claim 1, characterized in that: In the starting phase control method, the vehicle controller controls the engine speed to increase by a certain amount, specifically: increasing the engine speed by 245 rpm-255 rpm at the current idle speed of the vehicle.

5. The diesel engine vehicle driving assistance control method according to claim 4, characterized in that: The current idle speed is divided into normal idle speed and idle speed when the air conditioner is turned on.

6. The diesel engine vehicle driving assistance control method according to any one of claims 1 to 5, characterized in that: The starting phase control method also includes a torque control method, which is specifically as follows: During the starting process, if the vehicle controller recognizes that the vehicle starting resistance is too large, the vehicle controller increases the engine torque by controlling the engine's fuel injection amount, air intake amount, and injection timing.

7. The diesel engine vehicle driving assistance control method according to claim 6, characterized in that: Determine whether the vehicle's starting resistance is too large based on the throttle opening and vehicle acceleration.

8. The diesel engine vehicle driving assistance control method according to claim 7, characterized in that: The specific method to judge whether the vehicle starting resistance is too large is: When the throttle opening is greater than the set opening value, the vehicle speed is greater than 0 and less than the set speed value, and the acceleration is less than the set acceleration value, it is judged that the vehicle starting resistance is too large, and then the vehicle controller increases the fuel injection amount, increases the intake amount, and controls the injection timing in advance to increase the engine torque.

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