WO2010012185A1

WO2010012185A1 - An automatic fuel saving system and a method thereof

Info

Publication number: WO2010012185A1
Application number: PCT/CN2009/072578
Authority: WO
Inventors: 孙宏伟
Original assignee: Sun Hongwei
Priority date: 2008-08-01
Filing date: 2009-07-01
Publication date: 2010-02-04
Also published as: CN101659254A; CN101659254B; CN101353984A

Abstract

There is an automatic fuel saving system and a method thereof. Said system includes a fuel consumption rate detecting device (201) for detecting the fuel consumption rate of a vehicle at present state, a speed signal detecting device (202) for detecting the currently speed of the vehicle, a fuel saving judging-controlling device (203) for judging whether the currently speed is the speed in which the fuel is saved optional, if not, judging acceleration or deceleration to make more fuel efficiency. The fuel saving judging-controlling device (203) sends a control signal to the acceleration and deceleration controlling device to increase or decrease the speed of the vehicle. The embodiment of the invention makes the vehicle accelerate or decelerate to adjust the speed to a speed in that the fuel is most saved based on judging whether the currently speed is the speed in that the fuel is most saved based on the currently speed and the fuel consumption rate relation to save the fuel.

Description

System and method for automatic fuel saving

The present invention relates to the field of vehicle control technologies, and in particular, to a system and method for automatic fuel saving. Background technique

The issue of energy efficiency has always been an important aspect of energy-saving technology, and energy efficiency can be achieved by saving energy. Fuel-saving technologies are usually considered from the following aspects:

The first is the development of automotive products, improving the car's related products by reducing the weight of the car, reducing engine running resistance, reducing the drag coefficient, etc.; or developing more advanced engine technologies, such as variable valve phase technology, variable intake pipe length technology. Turbocharging technology, lean combustion technologies such as direct injection in cylinders, dual ignition technology, etc. These technologies can improve engine performance, thereby reducing fuel consumption and enhancing engine power. There is also energy recovery and reuse to save energy and achieve fuel savings.

The second is to artificially improve driving skills and save fuel by using some fuel-saving driving habits. During the driving process, the fuel consumption rate and the driving speed have a certain relationship due to the influence of road conditions and resistance such as wind speed. See Figure 1 for the speed and fuel consumption rate of a vehicle traveling straight on a straight, windless road. Diagram of the relationship. The flow rate at the fuel supply line is 9 ml/s, and the flow rate at the fuel return line is 6 ml/s, that is, 3 ml of oil per second, and the vehicle speed is 12 m/s, which is equivalent to 4 m per ml of fuel; When the vehicle speed is 24m/s, 4ml of oil per second is equivalent to 6m per ml of fuel; when the speed of the car is 25m/s, 5ml of oil per second is equivalent to 5m per ml of fuel; When the speed is 32m/s, 8ml of oil per second is equivalent to 4m per milliliter of fuel. Figure 1 shows that fuel savings can be achieved with the most fuel-efficient speeds in different road conditions and drag conditions.

After researching the prior art, the inventors found that the development of automotive products is now relatively adequate, and the space for further improvement is relatively small. In the case of different road conditions and resistance, man-made judgment of the most fuel-efficient speed, even if the driver has a wealth of experience, it is difficult to determine the maximum distance traveled by a unit of fuel, that is, it is difficult to judge the selection High speeds save fuel. Summary of the invention

In order to improve the fuel utilization rate of a fluid fuel driven vehicle driven by a power source, the present invention devises a system and method for automatic fuel saving, which is judged to achieve a more complete fuel by detecting the relationship between the current traveling speed of the vehicle and the fuel consumption rate. Whether the use should accelerate or decelerate, and accelerate or decelerate accordingly to achieve automatic fuel saving. The technical solution of the embodiment of the present invention is as follows:

A system for automatic fuel savings, the system comprising:

a fuel consumption rate detecting device, configured to detect a fuel consumption rate of the vehicle in a current state, the fuel consumption rate being a fuel amount consumed by the vehicle per unit time;

a traveling speed signal detecting device for detecting a current traveling speed of the vehicle; a fuel saving determining control device, configured to detect a fuel consumption rate according to the fuel consumption rate detecting device, and the traveling speed signal detecting device detects The current driving speed, whether the current driving speed is the most fuel-saving driving speed, and if not, determining whether the vehicle reaches the most fuel-saving traveling speed, whether it needs to accelerate or decelerate, and to the acceleration/deceleration control device Transmitting a control signal, controlling the acceleration/deceleration control device to increase or decrease the traveling speed of the vehicle accordingly;

And an acceleration/deceleration control device, configured to receive a control signal sent by the fuel economy determination control device, and correspondingly increase or decrease a traveling speed of the vehicle according to the control signal.

In another aspect, an embodiment of the present invention provides a method for automatic fuel saving, the method comprising:

Detecting a fuel consumption rate of the vehicle in a current state, the fuel consumption rate being a fuel amount consumed by the transportation tool per unit time;

Detecting a current travel speed of the vehicle;

Determining whether the current travel speed is the most fuel-saving travel speed based on the detected current fuel consumption rate and the travel speed of the vehicle, and if not, determining that the vehicle reaches the most fuel-saving travel speed, Need to accelerate or slow down;

According to the judgment result, the traveling speed of the vehicle is increased or decreased accordingly.

According to the relationship between the current traveling speed and the fuel consumption rate, the embodiment of the present invention determines whether the current traveling speed is the most fuel-saving traveling speed, thereby accelerating or decelerating the vehicle, and gradually adjusting the driving speed to the most fuel-saving speed. , to achieve the purpose of saving fuel. DRAWINGS

1 is a schematic diagram showing the relationship between the fuel consumption rate of a vehicle in the prior art and the distance traveled per milliliter of fuel;

2 is a schematic structural view of a fuel automatic saving system according to Embodiment 1 of the present invention;

Fig. 3 is a flow chart showing a method of automatic fuel saving provided in Embodiment 2 of the present invention. detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Example 1

Embodiments of the present invention provide a system for automatic fuel saving, which can be applied to all vehicles that use an acceleration controller, for example, in an automobile, which automatically determines the current vehicle speed and fuel. The relationship of the consumption rate determines whether the current vehicle speed is the most fuel-saving traveling speed, and thereby increases or decreases the acceleration controller, thereby achieving the purpose of fuel saving.

Referring to Figure 2, the fuel automatic saving system includes:

A fuel consumption rate detecting means 201 for detecting a fuel consumption rate of the automobile in a current state, the fuel consumption rate including the amount of fuel consumed by the vehicle per unit time.

Specifically, the fuel consumption rate detecting device 201 may be two fuel flow sensors disposed at an oil inlet line and a return line of the automobile, and calculating the amount of fuel used per second according to the flow difference between the inlet line and the return line. In addition, it is also possible to directly extract the electric signal at the injector without using the above two fuel flow sensors, obtain the final injection time given after all the working conditions of the automobile engine, and then calculate the per second according to the characteristics of the injector. The amount of fuel used, not only takes into account that all the working conditions of the original car design are not affected, but also obtains the fuel injection time of the final operation of the injector, and the signal of the fuel consumption rate obtained is more accurate.

The driving speed signal detecting device 202 is configured to detect the current traveling speed of the automobile.

In the case of a car, the speed signal can be obtained directly from the vehicle speed sensor of the vehicle output shaft or from the wheel speed sensor of a certain wheel, so that the vehicle speed signal detecting device 202 does not need to add an additional sensor.

The fuel economy determination control device 203 is configured to determine the fuel consumption rate detected by the fuel consumption rate detecting device 201 and the current traveling speed detected by the traveling speed signal detecting device 202. Whether the current driving speed is the most fuel-saving driving speed, and if not, determining whether the vehicle reaches the most fuel-saving traveling speed, whether it needs to accelerate or decelerate, and to the acceleration/deceleration control device

204 sends a control signal that controls the acceleration/deceleration control device 204 to increase or decrease the travel speed of the vehicle accordingly.

Specifically, in the embodiment of the present invention, the fuel economy determination control device 203 can be a single chip chip. During the operation of the fuel economy determination control device 203, whether the acceleration or deceleration is required is calculated according to the signal corresponding to the fuel consumption rate and the signal corresponding to the vehicle speed, thereby realizing automatic control of the fuel economy system, that is, collection of all signals. , and the correlation calculation of the signal can be automatically completed by the system, and generate a control signal to control acceleration or deceleration.

It should be noted that in an ordinary automobile, it is necessary to acquire a correlation signal by the fuel consumption rate detecting device 201 and the traveling speed signal detecting device 202, and then calculate whether acceleration or deceleration is required; then the fuel saving judgment control device 203 sends a control signal to Acceleration and deceleration control device to control vehicle acceleration or deceleration. In the electronic throttle car, the preferred solution is: using the fuel saving judgment control device 203 to directly obtain signals such as the vehicle speed and the injection time from the diagnostic interface of the on-board computer, using the fuel injection characteristics of the injector and the number of engine cylinders. To calculate the most fuel-saving driving speed; then directly send the control signal to the engine control computer, and use the engine control computer to control the electronic throttle to achieve acceleration or deceleration control of the vehicle, so that only the fuel saving judgment control device 203 and The above-mentioned corresponding interfaces of the electronic throttle car can be connected, thereby making the system more optimized.

Preferably, the fuel economy determining device 203 of the embodiment of the present invention determines whether the vehicle needs to accelerate or decelerate at present, and may use the following method: detecting the fuel consumption rate and the vehicle speed in a preset time interval. Thereby, the corresponding relationship between the fuel consumption rate and the vehicle speed at different time intervals is obtained, and the larger the ratio is, the larger the distance traveled by the vehicle is, the higher the driving utilization rate of the fuel is; The lower the utilization rate. When the determination is made, the ratio of the currently detected vehicle speed to the fuel consumption rate is compared with the ratio of the vehicle speed and the fuel consumption rate obtained in the previous detection. If the ratio of the currently detected vehicle speed to the fuel consumption rate is large, If the utilization rate of the fuel is increased, the speed can be further increased. If the ratio of the currently detected vehicle speed to the fuel consumption rate is small, it indicates that the fuel utilization rate is lowered, and the speed needs to be lowered to improve the fuel utilization rate. Adjusting the speed of the vehicle according to the above process will eventually enable the vehicle to adjust to near the most fuel-saving speed. Until the detected ratio of the current vehicle speed to the fuel consumption rate is equal to the last detection The ratio of the vehicle speed to the fuel consumption rate indicates that the fuel utilization rate has reached the highest. When the vehicle speed value is the same at this time, the high speed is the control target, and the purpose is to improve the driving efficiency.

Specifically, the process of adjusting the optimal vehicle speed of the automobile will be described by the following example. First, after a period of time after the start of the vehicle, the vehicle speed and fuel consumption rate are detected, and the ratio of the initial vehicle speed to the fuel consumption rate is obtained. After the preset time interval, the second detection is performed, and the second is obtained. The ratio of the vehicle speed and the fuel consumption rate of the second detection is compared with the ratio obtained by the initial detection, and if the ratio of the second detection is greater than or equal to the ratio of the initial detection, the vehicle speed is further increased. Otherwise, the vehicle speed is reduced; after that, after the preset time is separated, the third detection is performed, and the ratio obtained by the third detection is compared with the ratio obtained by the second detection, if the third detection is obtained If the ratio is greater than or equal to the ratio of the second detection, the vehicle speed is further increased, otherwise the vehicle speed is reduced; thus, the cycle detection is performed, and the vehicle speed is adjusted, and finally the vehicle can be adjusted to travel near the most fuel-saving speed.

The acceleration/deceleration control device 204 is configured to receive the control signal sent by the fuel economy determination control device 203, and correspondingly increase or decrease the traveling speed of the vehicle according to the control signal.

Specifically, in the embodiment of the present invention, the acceleration/deceleration control device 204 is configured to control to increase or decrease the acceleration controller to increase or decrease the traveling speed of the automobile, and accelerate the controller, that is, the throttle, in the automobile. The acceleration/deceleration control device 204 includes at least one output motor, a motor-related gear reduction mechanism, and a pull wire that connects the accelerator pedal, and the cable should be mounted at the most easily applied force of the accelerator pedal. The acceleration/deceleration control device 204 can increase or decrease the throttle by the above components. The output motor drives the associated gear reduction mechanism and interlocks the accelerator pedal to increase or decrease the throttle.

Preferably, in the embodiment of the present invention, the magnitude of the increase or decrease of the throttle is divided into 100 scalars, that is, when the throttle is not stepped, the scalar of the throttle is defined as 0, and when the throttle is depressed, the scalar definition of the throttle is defined. Is 100. When increasing or decreasing the throttle, each time you increase a scalar or decrease the three scalars, the amount of change in the throttle of the car is slowly changed. In a place where the road conditions are relatively stable, the car can slowly accelerate or decelerate. In places where the road conditions are good or bad, the throttle will not suddenly increase and decrease continuously, which makes the driving of the car more stable and does not cause the comfort performance to drop.

On the other hand, in order to prevent the automatic fuel saving system provided by the embodiment of the present invention from affecting normal human driving, the automatic fuel saving system of the embodiment of the present invention further includes: an artificial motion detecting device 205.

The human motion detecting device 205 is configured to detect whether the vehicle is operated manually, such as driving The accelerator pedal, control brake or clutch, etc., if any, sends an interrupt signal to the system, and the automatic fuel saving system suspends or stops the operation of the fuel automatic saving system after receiving the interrupt signal. Therefore, the fuel automatic saving system of the embodiment of the present invention forcibly withdraws when the driver intervenes, and does not affect normal human driving.

Further, in order to enable the fuel automatic saving system of the present invention to be better applied in a vehicle, the present invention may also add a display device 206 to the driver for providing relevant information in the fuel saving process to the driver. Preferably, the fuel automatic saving system of the present invention can display information by using the following method: When the vehicle is running normally, the main switch of the fuel automatic saving system is turned on, and the first indicator of the fuel saving control system is illuminated, indicating that the system enters the fuel. Saving control program, the fuel saving system can work. When the driver manually touches the start switch, the first indicator light and the second indicator light are on at the same time, the fuel saving system starts to work, and the detected vehicle speed signal and fuel are detected. The consumption rate signal is presented to the driver through the display screen. Further, it can be calculated that the current unit amount of fuel can make the distance traveled by the vehicle and presented to the driver through the display screen, so that the driver can intuitively know the current Fuel consumption at the speed of the car. When the driver performs the human operation for a short time, the human motion detecting device 205 notifies the system to stop working, and the third indicator light is on, indicating that the system enters the stop working state, and the driver performs manual operation in a short time, when driving After the manual operation of the person is stopped, preferably, the fuel saving system can be restarted after the driver stops operating for 5 seconds, at which time the third indicator light is extinguished, and the first indicator light and the second indicator light are re-lighted. The system restarts to work. The addition of display device 206 makes the use of the fuel economy system more user friendly.

The system of the embodiment of the present invention can also be applied to other vehicles with acceleration and deceleration control, such as airplanes, ships, and the like. The specific application method is the same as that in the automobile, and will not be described herein.

According to the relationship between the current traveling speed and the fuel consumption rate, the embodiment of the present invention determines whether the current traveling speed is the most fuel-saving traveling speed, thereby accelerating or decelerating the vehicle, and gradually adjusting the driving speed to the most fuel-saving speed. , to achieve the purpose of saving fuel. Example 2

The embodiment of the invention provides a method for automatic fuel saving, which is described on the basis of the system of automatic fuel saving provided in Embodiment 1, and can be applied to all vehicles using an accelerator pedal, in the automobile. As an example, the current vehicle speed and fuel consumption rate are used to judge the current Whether the vehicle speed is the most fuel-saving driving speed, and thereby increasing or decreasing the traveling speed, achieves the purpose of saving fuel. Referring to FIG. 3, the method provided by the embodiment of the present invention is specifically as follows:

301: Detecting a fuel consumption rate and a traveling speed of the vehicle in a current state, and the fuel consumption rate is a quantity of fuel consumed by the vehicle per unit time.

Specifically, when detecting the fuel consumption rate, two fuel flow sensors may be disposed at the intake and return lines of the automobile, and the fuel usage per second is calculated based on the flow difference between the inlet and return lines. In addition, it is also possible to directly extract the electric signal at the injector without using the above two fuel flow sensors, obtain the final injection time given after all the working conditions of the automobile engine, and then calculate the per second according to the characteristics of the injector. The amount of fuel used, not only does not affect all the working conditions of the original car design, but also obtains the fuel injection time of the final operation of the injector, and the signal of the fuel consumption rate obtained is more accurate.

In the case of a car, the speed signal can be obtained directly from the vehicle speed sensor of the vehicle output shaft or from the wheel speed sensor of a certain wheel.

302: Determine, according to the current fuel consumption rate and the traveling speed of the vehicle, whether the current driving speed is the most fuel-saving traveling speed, and if not, determine that the vehicle reaches the most fuel-saving traveling speed, and the acceleration is required. Still slow down.

Preferably, in the embodiment of the present invention, when determining that the vehicle needs to be accelerated or accelerated, the following method may be used: The fuel consumption rate and the vehicle speed are detected within a preset time interval. Thus, the correspondence between the fuel consumption rate and the vehicle speed at different time intervals is obtained, and the ratio of the vehicle speed to the fuel consumption rate is used as a reference standard for fuel utilization, that is, the ratio of the vehicle speed to the fuel consumption rate is larger, indicating a unit amount of fuel. The farther the vehicle travels, the higher the utilization rate of the fuel; on the contrary, the lower the utilization rate of the fuel. When the determination is made, the ratio of the currently detected vehicle speed to the fuel consumption rate is compared with the ratio of the vehicle speed and the fuel consumption rate obtained in the previous detection. If the ratio of the currently detected vehicle speed to the fuel consumption rate is large, If the utilization rate of the fuel is increased, the speed can be further increased. If the ratio of the currently detected vehicle speed to the fuel consumption rate is small, it indicates that the fuel utilization rate is lowered, and the speed needs to be lowered to improve the fuel utilization rate. Adjusting the speed of the vehicle according to the above process will eventually enable the vehicle to adjust to near the most fuel-saving speed. Until the detected ratio of the current vehicle speed to the fuel consumption rate is equal to the ratio of the vehicle speed and the fuel consumption rate obtained in the previous test, the fuel utilization rate reaches the highest, and the vehicle speed at the current speed is the most fuel-saving; The driving speed state is the same as the comparison value in the low traveling speed state, and the high speed is the control target, and the purpose is to improve the driving efficiency. Specifically, in the embodiment of the present invention, a single chip can be used for determining the acceleration or deceleration. During the operation of the single chip, according to the signal corresponding to the fuel consumption rate and the signal corresponding to the vehicle speed, whether acceleration or Deceleration, thereby achieving automatic control of the fuel economy system, the collection of all signals, and the related calculation of the signals can be automatically completed by the microcontroller chip, and generate control signals for controlling acceleration or deceleration.

303: According to the judgment result in 302, the traveling speed of the vehicle is increased or decreased accordingly. Specifically, in the embodiment of the present invention, the driving speed of the automobile is increased or decreased by increasing or decreasing the control signal of the acceleration controller. In the automobile, the acceleration controller, that is, the throttle, is preferably divided into 100 scalars in the embodiment of the invention, that is, when the throttle is not stepped, the scalar of the throttle is defined as 0, at the throttle When you step on it, define the throttle scalar as 100. When increasing or decreasing the throttle, each time you increase a scalar or reduce three scalars, the amount of change in the throttle of the car is slowly changed. In a place where the road conditions are relatively stable, the car can accelerate or decelerate slowly. In the case of good or bad road conditions, the throttle will not suddenly increase and decrease continuously, which makes the driving of the car more stable and does not cause the comfort performance to decline.

On the other hand, for the automatic fuel saving system provided by the embodiment of the present invention, the normal human driving is not affected, and the operation of the vehicle is required to be detected. When the vehicle is detected, the driver steps on the accelerator. When the brake or clutch is controlled, the fuel automatic saving system is suspended or stopped. Therefore, the fuel automatic saving system of the embodiment of the present invention forcibly withdraws when the driver intervenes, without affecting normal human driving. For aircraft, ships and other vehicles, the specific application method is the same as that used in automobiles, and will not be described here.

The embodiment of the present invention determines whether the current vehicle speed is the most fuel-saving traveling speed by judging the relationship between the current vehicle speed and the fuel consumption rate, thereby determining whether to increase or decrease the throttle, and gradually adjusting the traveling speed to the most fuel-saving. The driving speed achieves the purpose of saving fuel. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

Claim

A system for automatic fuel saving, characterized in that the system comprises:

2. The system of automatic fuel economy according to claim 1, wherein the system further comprises:

An artificial motion detecting device, configured to detect whether the vehicle is manually operated, and if yes, send an interrupt signal to the system according to the manual operation, and the fuel automatic saving system stops working after receiving the interrupt signal or Suspend work.

3. The fuel automatic saving system according to claim 1, wherein the fuel economy determination control device is a single chip, and the fuel economy determination control device is based on the fuel consumption rate signal and the traveling speed. The signal is calculated in the microcontroller chip and the control signal is output.

4. The system of automatic fuel economy according to claim 1, wherein the acceleration/deceleration control device increases the traveling speed of the vehicle by increasing an acceleration controller control signal of the vehicle, by subtracting The acceleration controller control signal of the vehicle is reduced to reduce the traveling speed of the vehicle, and the amount of the acceleration controller control signal that is increased or decreased is a preset scalar value.

5. The system of automatic fuel economy according to claim 1, wherein:

The fuel economy judgment control device is specifically configured to detect a travel speed and a fuel consumption rate of the vehicle in each preset time interval, and calculate a travel speed of the vehicle in each time interval. And a ratio of the fuel consumption rate; comparing the ratio of the current traveling speed to the fuel consumption rate with the ratio of the traveling speed and the fuel consumption rate obtained in the previous detection, and if greater than or equal to, controlling the acceleration/deceleration control device to increase The traveling speed of the vehicle, if less, controls the acceleration/deceleration control device to reduce the traveling speed of the vehicle.

6. The system of automatic fuel economy according to claim 1, wherein the system further comprises:

a display device, configured to display a driving speed signal and a fuel consumption rate signal of the vehicle; and display a signal that the system is working normally when the system is working normally, when the human motion detecting device detects that the human being is During operation, the system displays a signal to suspend work, resume control work, or stop working.

7. A method of automatically saving fuel, characterized in that the method comprises:

Detecting a current travel speed of the vehicle;

The method of automatically saving fuel according to claim 7, wherein the method further comprises:

The operation of detecting whether the vehicle is manned, if any, stops or suspends the automatic fuel saving operation.

9. The method of automatically saving fuel according to claim 7, wherein said increasing or decreasing the traveling speed of said vehicle comprises:

Increasing the travel speed of the vehicle by increasing an acceleration controller control signal of the vehicle, or reducing the travel speed of the vehicle by reducing an acceleration controller control signal of the vehicle, and increasing The amount of the large or reduced acceleration controller control signal is a preset scalar value.

10. The method of automatically saving fuel according to claim 7, wherein the determining is to make the vehicle reach the most fuel-saving driving speed, whether it needs to be accelerated or decelerated, and further includes:

Detecting a running speed and a fuel consumption rate of the vehicle during a preset time interval, and comparing a ratio of a running speed of the vehicle and a fuel consumption rate in each time interval;

The determination is to make the vehicle reach the most fuel-saving driving speed, whether it needs to be accelerated or decelerated, including:

Comparing the ratio of the current traveling speed to the fuel consumption rate, and comparing the ratio of the traveling speed obtained by the last detection to the fuel consumption rate, if it is greater than or equal to, determining that the vehicle needs to increase the speed; if less, determining the Vehicles need to reduce speed.

The detected traveling speed signal and the fuel consumption rate signal of the vehicle are displayed; when the operation signal, when a human operation is detected, a signal to suspend or stop the fuel saving operation is displayed.