CN102092389B - Vehicle constant speed control method and device - Google Patents

Abstract

A constant speed control method for vehicle includes such steps as using an electronic control unit to detect if a constant speed switch of vehicle is pressed, entering a constant speed mode when the constant speed switch is pressed, and sending out a signal to lock a throttle valve for keeping the opening of throttle valve and regulating the speed ratio of an electronic stepless speed variator for keeping the vehicle running at constant speed. The invention also relates to a vehicle constant speed control device for implementing the method.

Description

Vehicle constant speed control method and device

technical field

The invention relates to a vehicle constant speed control method and device, in particular to a vehicle constant speed control method and device for maintaining a constant speed running of a vehicle by adjusting the speed ratio of an ECVT gearbox to control a motor.

Background technique

Commonly used vehicle constant speed control methods are mostly based on the electronic control unit to control the opening and closing degree of the throttle valve to achieve the purpose of fixing the vehicle speed. For example, the Taiwan No. I312325 Patent of Invention issued by the applicant previously approved and announced, which discloses a "motorcycle speed control device and a constant speed cruise program applied to the device", please refer to Figure 8, when the motorcycle driver presses the When the fixed speed start/close switch of the motorcycle speed control device, a controller senses various data, and when it is judged that the vehicle speed is lower than the fixed speed, the controller will adjust a throttle valve and a fuel nozzle to increase the delivery speed. The air flow and gasoline volume entering a combustion chamber; when the vehicle speed is judged to be higher than the constant speed, the controller reversely adjusts the throttle valve and the fuel nozzle to reduce the air flow and gasoline volume entering the combustion chamber .

However, the above-mentioned conventional motorcycle speed control device and constant speed cruise program still have the following problems in actual use, for example: when the motorcycle speed control device intends to change the opening degree of the throttle valve and the fuel injection nozzle to change the The amount of air and gasoline in the combustion chamber is used to adjust the speed of the vehicle to maintain a constant speed. It is easy to cause the speed of the vehicle engine to fluctuate from high to low, and the rapid change of the engine speed cannot make the fuel in the combustion chamber achieve the best combustion efficiency. . As a result, although conventional motorcycle speed control devices can achieve the purpose of maintaining constant speed cruising, they also increase the amount of oil consumed.

Therefore, it is necessary to provide a vehicle constant speed control method and device to solve the problems existing in the prior art.

Contents of the invention

The main purpose of the present invention is to provide a vehicle constant speed control method, which first utilizes an electronic control unit to detect whether the constant speed switch of a vehicle is pressed, when the constant speed switch is pressed, then enters the constant speed mode, and A signal is sent through the electronic control unit to lock a throttle locking device to maintain a constant opening of the throttle valve, and adjust the speed ratio of an electronic continuously variable transmission so that the vehicle can run with better combustion efficiency Running at a constant speed, wherein before entering the constant speed mode, the method includes: judging by the electronic control unit whether the vehicle speed sensed by a vehicle speed sensing device is within a set range, and when it is determined that the vehicle speed is within the set range , enter the constant speed mode, wherein the electronic continuously variable transmission includes a speed ratio control motor and a pulley set, the electronic control unit judges whether the vehicle speed is higher or lower than a certain speed value, when it is judged that the vehicle speed is higher than the constant speed value, the pulley set is adjusted to a low speed ratio by the speed ratio control motor; or, when the vehicle speed is judged to be lower than the fixed speed value, the pulley set is adjusted to a high speed ratio by the speed ratio control motor.

A secondary object of the present invention is to provide a vehicle constant speed control device, which includes an electronic control unit, an electronic continuously variable transmission, a constant speed switch, a vehicle speed sensing device and a throttle lock device, when pressed When the constant speed switch is activated, the electronic control unit locks the throttle lock device to maintain the opening of a throttle valve and adjust the speed ratio of the electronic continuously variable transmission, so that the vehicle can be fixed with better combustion efficiency. Speed driving, wherein the electronic continuously variable transmission includes a speed ratio control motor and a pulley set, wherein the pulley set includes a first pulley wheel and a second pulley pulley, the speed ratio control motor is used to adjust The speed ratio of the first pulley wheel relative to the second pulley wheel.

In an embodiment of the present invention, the method further includes: judging by the electronic control unit whether an accelerator opening sensing device sends out an accelerator opening signal, and when it is judged that the change of the accelerator opening exceeds a preset value, Release the constant speed mode.

In an embodiment of the present invention, the method further includes: judging by the electronic control unit whether a brake switch is activated, and disabling the constant speed mode when judging that the brake switch is activated.

In an embodiment of the present invention, the method further includes: judging by the electronic control unit whether the speed control switch is pressed again, and releasing the speed control mode when the speed control switch is pressed again.

In an embodiment of the present invention, the vehicle constant speed control device further includes a brake switch and a display, which are respectively electrically connected to the electronic control unit.

Description of drawings

Figure 1: A schematic diagram of the structure of the electronic continuously variable transmission of the vehicle constant speed control device of the present invention.

Figure 2: A schematic diagram of the circuit structure of the vehicle constant speed control device of the present invention.

Fig. 3: Functional block diagram of the vehicle constant speed control device of the present invention.

Fig. 4: The mode selection and speed ratio adjustment flow chart of the preferred embodiment of the vehicle constant speed control method of the present invention.

Fig. 5: The flow chart of mode release of the vehicle constant speed control method of the present invention.

Fig. 6: A schematic diagram of the action of reducing the speed ratio of the electronic continuously variable transmission structure of the vehicle constant speed control device of the present invention.

Fig. 7: Schematic diagram of the action of increasing the speed ratio of the electronic continuously variable transmission structure of the vehicle constant speed control device of the present invention.

Figure 8: Functional block diagram of an existing motorcycle speed governor.

[Description of main component symbols]

10 Electronic continuously variable transmission 11 Belt pulley group

12 The first pulley pulley 13 The second pulley pulley

14 belt 15 speed ratio control motor

16 reduction gear set

20 electronic control unit 21 constant speed switch

22 Brake switch 23 Throttle opening sensing device

24 vehicle speed sensing device 25 display

26 Throttle valve locking device

Steps of S101 detecting whether the speed switch is pressed

Step S102 Detecting whether the vehicle speed is lower than the set value

Step S103 Detecting whether the vehicle speed is higher than the set value

S104 enters constant speed mode

S105 maintain normal operation mode

Steps of S201 Detecting whether the vehicle speed is higher than the constant speed setting value

S202 Steps for detecting whether the vehicle speed is lower than the constant speed setting value

S203 Adjust to low speed ratio

S204 to high speed ratio adjustment

S205 maintain speed ratio

Step S301 Detecting whether the change of the throttle opening exceeds a preset value

Step S302 Detecting whether the braking signal is generated

Steps of S303 detecting whether the speed switch is pressed again

Step S304 Detecting whether the vehicle speed is higher than the set value

Steps of S305 detecting whether the vehicle speed is lower than the set value

S306 Maintain constant speed mode

S307 Release constant speed mode

Detailed ways

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, preferred embodiments of the present invention will be exemplified below in detail with accompanying drawings.

Please refer to Fig. 1, which discloses a schematic diagram of the structure of the electronic continuously variable transmission used in the vehicle constant speed control device of the preferred embodiment of the present invention, wherein the electronic continuously variable transmission (Electric Continuously Variable Transmission, referred to as ECVT) is the current automobile , motorcycles and other vehicles commonly used in a transmission, but the commonly used electronic continuously variable transmission can only automatically adjust the speed ratio of the belt pulley group according to the sensing of torque and resistance. The above method of controlling the commonly used electronic continuously variable transmission is different from The method for controlling an electronic continuously variable transmission 10 of the present invention. The electronic continuously variable transmission 10 adopted by the vehicle constant speed control device of the present invention includes a pulley set 11 and a speed ratio control motor 15, wherein the pulley set 11 further includes a first pulley pulley 12 and a second pulley pulley. Pulley pulley 13, the first and second pulley pulleys 12, 13 are respectively composed of a pair of opposite tapered face disks (not marked) to form a pulley pulley with variable pitch. Furthermore, a belt 14 is attached to the first and second pulley wheels 12 , 13 to transmit the power of the first pulley wheel 12 to the second pulley wheel 13 . The term of the belt 14 is a general term, but its material is not limited to the leather belt body, it can be selected from leather, rubber, rubber and fabric mixed, or made of metal.

Please refer to FIG. 1 again, the speed ratio control motor 15 is used to rotate and drive one side of the first pulley pulley 12 through a reduction gear set 16 to move axially, so as to change the first pulley pulley 12 the pitch. The speed ratio control motor 15 can be a DC motor, an AC motor, a brushed or brushless motor, or any type of electric motor such as a servo motor. When the pitch of the first pulley wheel 12 was changed, the second pulley wheel 13 was pushed by a spring or a weight troller (not shown) to automatically adjust the pitch, so that the belt 14 Maintaining a certain tension is the general structure of ECVT, so it will not be described in detail here. When the speed ratio control motor 15 rotates forward or reverse, the speed ratio of the first and second pulley wheels 12, 13 can be changed, thereby achieving the purpose of continuously variable speed. The speed ratio referred to in the present invention is the ratio of the number of revolutions of the first pulley wheel 12 to the second pulley wheel 13 .

Please refer to FIG. 2 for the circuit structure diagram used by the vehicle constant speed control device of the preferred embodiment of the present invention, and FIG. 3 for the functional block diagram of the vehicle constant speed control device of the present invention. Wherein the constant speed control device comprises an electronic control unit 20, a constant speed switch 21, a brake switch 22, an accelerator opening sensing device 23, a vehicle speed sensing device 24, a display 25, and a throttle locking device 26 and the speed ratio control motor 15, wherein the electronic control unit 20 is electrically connected to the constant speed switch 21, the brake switch 22, the throttle opening sensing device 23, the vehicle speed sensing device 24, the display 25, and the throttle valve. The locking device 26 and the speed ratio control the motor 15 . The electronic control unit 20 (Electric Control Unit, referred to as ECU) is an arithmetic processor, which can accept the signal of the constant speed switch 21, the brake signal 221 of the brake switch 22, and the throttle opening of the throttle opening sensing device 23. degree signal 231, and the vehicle speed signal 241 produced by the vehicle speed sensing device 24 and are calculated to output relevant control signals to control the display 25, the throttle lock device 26 and the action of the speed ratio control motor 15, wherein the speed ratio The speed ratio of the first and second pulley pulleys 12 , 13 of the pulley set 11 can be changed by controlling the rotation of the motor 15 . The speed control switch 21 can be electronic switches such as push button switch, touch switch or lever switch.

Please refer to Figures 2, 3 and 4, wherein Figure 4 further discloses the mode selection and speed ratio adjustment flow chart of a preferred embodiment of the vehicle constant speed control method of the present invention, and the present invention will describe the electronic control unit 20 in detail below Steps to choose whether to enter the constant speed mode:

In step S101, the electronic control unit 20 first detects whether the speed control switch 21 is pressed, and when the electronic control unit 20 detects that the speed control switch 21 has not been pressed, the vehicle will maintain the normal operation mode (step S105) , wherein the so-called general operating mode of the present invention refers to that the vehicle speed of the vehicle is controlled by the traditional variable throttle opening, and when the driver desires to increase the speed, increase the throttle opening (usually the throttle opening control device of the motorcycle is the throttle handle , and the car is an accelerator pedal) to increase the engine speed, at this time, the electronic continuously variable transmission 10 automatically adjusts the speed ratio of the belt pulley set 11 according to the sensing of torque and resistance; otherwise, when the driver wants to reduce the speed of the vehicle, Then reduce the throttle opening to reduce the engine speed. When the electronic control unit 20 detects that the speed control switch 21 is pressed, then go to step S102.

In step S102 , the electronic control unit 20 detects whether the vehicle speed signal 241 sent by a vehicle speed sensing device 24 is lower than a set value. When the vehicle speed is too low, the engine is usually at an unstable idle speed, and the speed ratio of the pulley set 11 of the electronic continuously variable transmission 10 may also reach a limit value, so it is necessary to set a minimum vehicle speed setting for entering the constant speed mode. Fixed value, to prevent engine from stalling or the operation of the speed ratio control motor 15 exceeding the limit value, the minimum vehicle speed setting value is, for example, 10 kilometers or 20 kilometers, etc., but is not limited to the above-mentioned speed. When the electronic control unit 20 detects that the vehicle speed signal 241 is lower than the minimum vehicle speed setting value for entering the constant speed mode, the vehicle maintains the normal operation mode (step S105); when the electronic control unit 20 detects that the vehicle speed signal 241 is not lower than the If the value is set, then proceed to step S103.

In step S103 , the electronic control unit 20 detects whether the vehicle speed signal 241 sent by the vehicle speed sensing device 24 is higher than another set value. When the vehicle speed is too high, entering the constant speed mode may cause safety problems, and the speed ratio of the pulley set 11 of the electronic continuously variable transmission 10 may also reach a limit value, so it is necessary to set a maximum speed limit for entering the constant speed mode. The vehicle speed setting value is to prevent the operation of the speed ratio control motor 15 from exceeding the limit value. The maximum vehicle speed setting value is, for example, 50 kilometers or 100 kilometers, etc., but is not limited to the above-mentioned speeds. When the electronic control unit 20 detects that the vehicle speed signal 241 is higher than the maximum vehicle speed setting value for entering the constant speed mode, the vehicle maintains the normal operation mode (step S105); when the electronic control unit 20 detects that the vehicle speed signal 241 is not higher than the When the value is set, then enter the speed-fixing mode (step S104), and display the state of the speed-fixing mode on the display 25, wherein the display 25 can be selected as an independent light or a symbol light in the vehicle instrument.

In the constant speed mode, the electronic control unit 20 sends a signal to lock the throttle valve locking device 26 , and the throttle valve locking device 26 can be an electronic throttle valve or a mechanical throttle valve. The purpose of locking this throttle locking device 26 is to keep the constant of the throttle opening, so that the engine can keep a certain speed. Because the best efficiency speeds of various engines are different, for example, most of the cars are between 1500RPM～4000RPM (rotation times/per minutes), most of the motorcycles are between 1800RPM～6000RPM, the preset engine speed of the electronic control unit 20 of the present invention can be fixed at a speed of optimum operating efficiency (not limited to the above-mentioned number of revolutions), and can also be locked at the press Lower the rotational speed of the constant speed switch at that time, or set the locking preset value of the throttle valve locking device 26 in an adjustable manner. The throttle locking device 26 can control the throttle valve of the vehicle through a solenoid valve or a servo motor.

After the vehicle of the present invention enters the constant speed mode (step S104), the electronic control unit 20 continues to detect the vehicle speed signal 241 of the vehicle speed sensing device 24. In step S201, when the electronic control unit 20 detects that the vehicle speed signal 241 is high When the speed is set, the electronic control unit 20 sends a signal to adjust the speed ratio control motor 15 to a low speed ratio (step S203), while substantially maintaining a constant air flow and gasoline flow into the engine combustion chamber. Please refer to Fig. 6, which discloses a schematic diagram of the action of reducing the speed ratio of the electronic continuously variable transmission structure of the vehicle constant speed control device of the present invention, wherein the first pulley wheel 12 is adjusted in the direction of pitch reduction, and the The second belt pulley wheel 13 is automatically adjusted toward the direction of pitch enlargement. In this embodiment, when the electronic control unit 20 sends a signal to adjust the speed ratio control motor 15 to a low speed ratio (step S203), the speed ratio control motor 15 continues to reduce the pitch of the first pulley pulley 12 to adjust the direction, and return to step S201. If the electronic control unit 20 detects that the vehicle speed signal 241 is not higher than the constant speed setting value, then proceed to step S202.

In step S202, when the electronic control unit 20 detects that the vehicle speed signal 241 of the vehicle speed sensing device 24 is lower than the constant speed setting value, the electronic control unit 20 sends a signal to make the speed ratio control motor 15 go to a high speed. Ratio adjustment (step S204), please refer to FIG. 7, which discloses a schematic diagram of the action of increasing the speed ratio of the electronic continuously variable transmission structure of the vehicle constant speed control device of the present invention, wherein the first pulley wheel 12 moves toward the pitch The direction of expansion is adjusted, and the second pulley wheel 13 is automatically adjusted to the direction of pitch reduction simultaneously. When the electronic control unit 20 sends a signal to make the speed ratio control motor 15 adjust to the high speed ratio (step S204), the speed ratio control motor 15 continues to adjust the first pulley pulley 12 to the direction of pitch expansion, and Go back to step S201. When the electronic control unit 20 detects that the vehicle speed signal 241 of the vehicle speed sensing device 24 is not lower than the constant speed setting value, the electronic control unit 20 stops sending signals for adjusting the speed ratio control motor 15 to maintain the speed. than (step S205), and return to step S201.

In this way, since the present invention locks the throttle locking device 26 when the vehicle speed is higher than or lower than the constant speed setting value, the throttle valve opening can be kept constant, and the engine speed can be maintained at a relatively constant speed. Optimum efficiency speed to effectively avoid incomplete fuel combustion, thereby reducing fuel consumption. At the same time, the speed ratio of the electronic continuously variable transmission 10 is adjusted through the speed ratio control motor 15 to adjust the vehicle speed to maintain the constant speed setting value, so as to achieve the purpose of constant speed driving.

Please refer to FIGS. 2 to 5 , wherein FIG. 5 further discloses a mode release flow chart of the vehicle constant speed control method of the present invention. When entering the constant speed mode ( S104 ), the vehicle is running in the constant speed mode, and the electronic control unit 20 synchronizes and continuously detects various signals to determine whether to release the constant speed. In step S301, the electronic control unit 20 judges whether the throttle opening sensing device 23 sends a throttle opening signal 231, when the electronic control unit 20 detects the throttle opening signal of the throttle opening sensing device 23 When the change of 231 exceeds the preset value, then release the constant speed mode (step S307); When an accelerator opening increase signal is generated, the vehicle returns to the normal operating mode, unlocks the throttle locking device 26, and returns to the general driving state in which the speed of the vehicle is controlled by changes in the accelerator opening. When the electronic control unit 20 does not detect that the change of the accelerator opening exceeds the preset value, then go to step S302.

In step S302, the electronic control unit 20 judges whether the brake switch 22 is activated, and when the electronic control unit 20 detects that the brake switch 22 sends a brake signal 221, the constant speed mode is released (step S307) That is to say, when the vehicle uses the brake switch 22, that is, when a brake signal 221 is generated by the brake lever or the brake pedal, it returns to the normal operation mode, and the lock on the throttle valve locking device 26 is released. Lock and restore the normal driving state where the speed is controlled by the accelerator. When the electronic control unit 20 does not detect that any braking signal 221 is generated, then proceed to step S303.

In step S303, it is judged by the electronic control unit 20 whether the constant speed switch 21 is pressed again, and when the electronic control unit 20 detects that the constant speed switch 21 is pressed again (step S303 is yes), then release Constant speed mode (step S307); That is to say, when the driver intends to release the constant speed mode, he can press the constant speed switch 21 again, so that he can return to the normal operation mode and release the throttle locking device 26 to restore the normal driving state where the vehicle speed is controlled by the accelerator. When the electronic control unit 20 does not detect that the speed switch 21 is pressed again (No in step S303), then proceed to step S304.

In step S304, when the electronic control unit 20 detects that the vehicle speed signal 241 sent by the vehicle speed sensing device 24 is higher than the preset maximum vehicle speed setting value of the constant speed mode, the constant speed mode is released (step S307); That is to say, when the vehicle speed is higher than the maximum speed setting value of the constant speed mode due to downhill or other factors, the vehicle returns to the normal operation mode, unlocks the throttle locking device 26, and resumes throttle control. General driving conditions of the vehicle speed. When the electronic control unit 20 detects that the vehicle speed signal 241 sent by the vehicle speed sensing device 24 is not higher than the preset maximum vehicle speed setting value, then proceed to step S305.

In step S305, when the electronic control unit 20 detects that the vehicle speed signal 241 sent by the vehicle speed sensing device 24 is lower than the preset minimum vehicle speed setting value of the constant speed mode, the constant speed mode is released (step S307); That is to say, when the vehicle speed is lower than the minimum speed setting value of the constant speed mode due to uphill, headwind or other factors, it returns to the normal operation mode, unlocks the throttle locking device 26, and resumes the normal operation mode. General driving conditions where the throttle controls the speed of the vehicle. When the electronic control unit 20 detects that the vehicle speed signal 241 sent by the vehicle speed sensing device 24 is not lower than the preset minimum vehicle speed, the constant speed mode is maintained (step S306 ).

As mentioned above, in the prior art, the amount of air and gasoline entering the combustion chamber is changed by adjusting the opening of the throttle valve and the fuel nozzle. Although the vehicle can be driven at a constant speed, the fuel in the combustion chamber cannot be reached. Best combustion efficiency; Compared with the above-mentioned shortcomings, the present invention maintains the vehicle engine at a substantially constant speed with better combustion efficiency by maintaining the throttle valve opening fixed, and then changes the speed by adjusting the speed ratio control motor 15. Wait until the speed of the vehicle is maintained, so it is really beneficial to achieve the purpose of making the vehicle run at a constant speed with better combustion efficiency and more fuel-efficient means.

Although the present invention has been disclosed with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art should be able to make various changes and modifications without departing from the spirit and scope of the present invention. Therefore The scope of protection of the present invention should be defined by the appended claims.

Claims (7)

1. a constant speed of vehicle control method, is characterized in that: this constant speed of vehicle control method comprises:

Whether the constant speed switch utilizing an electronic control unit to detect a vehicle is pressed, and when pressing this constant speed switch, enters a constant speed mode; And

Send a signal via this electronic control unit, to lock the constant opening degree that a flow regulating valve blocking device maintains a flow regulating valve, and the speed ratio of adjustment one electronic type toric transmission makes this vehicle maintain constant-speed traveling,

Wherein before entering this constant speed mode, the method comprises: judging whether the speed of a motor vehicle that a speed sensing device senses is positioned at a setting range by this electronic control unit, when judging that the speed of a motor vehicle is in this setting range, entering this constant speed mode,

Wherein this electronic type toric transmission comprises a Transmission Ratio Control motor and a belt pulley set, this electronic control unit judges that whether the speed of a motor vehicle is higher or lower than a constant speed value, when judging the speed of a motor vehicle higher than this constant speed value, by this Transmission Ratio Control motor, this belt pulley set is adjusted to a low speed ratio; Or, when judging the speed of a motor vehicle lower than this constant speed value, by this Transmission Ratio Control motor this belt pulley set is adjusted to one at a high speed than.

2. constant speed of vehicle control method as claimed in claim 1, wherein the method also comprises: judge whether an accelerator open degree sensing device sends an accelerator opening amount signal by this electronic control unit, when judging the change of this accelerator open degree more than a preset value, remove this constant speed mode.

3. constant speed of vehicle control method as claimed in claim 1, wherein the method also comprises: judge whether a BK Brake Switch starts by this electronic control unit, when judging that this BK Brake Switch starts, removes this constant speed mode.

4. constant speed of vehicle control method as claimed in claim 1, wherein the method also comprises: judging whether this constant speed switch is pressed again by this electronic control unit, when again pressing this constant speed switch, removing this constant speed mode.

5. a constant speed of vehicle control setup, it comprises an electronic control unit, an electronic type toric transmission, a constant speed switch and a speed sensing device, it is characterized in that: this constant speed of vehicle control setup also comprises:

One flow regulating valve blocking device, wherein this electronic control unit is judging that this constant speed switch locks this flow regulating valve blocking device to maintain the aperture of a flow regulating valve when being pressed, and adjusts the speed ratio of this electronic type toric transmission, and makes vehicle maintain constant-speed traveling,

Wherein this electronic type toric transmission comprises a Transmission Ratio Control motor and a Pulley group,

Wherein this Pulley group comprises one first belt plate wheel and one second belt plate wheel, and this Transmission Ratio Control motor is in order to adjust the speed ratio of this first belt plate wheel relative to this second belt plate wheel.

6. constant speed of vehicle control setup as claimed in claim 5, wherein this constant speed of vehicle control setup also comprises a BK Brake Switch, and it is electrically connected at this electronic control unit.

7. constant speed of vehicle control setup as claimed in claim 5, wherein this constant speed of vehicle control setup also comprises a telltale, and it is electrically connected at this electronic control unit.