WO2012113319A1

WO2012113319A1 - Method for automobile fuel saving

Info

Publication number: WO2012113319A1
Application number: PCT/CN2012/071338
Authority: WO
Inventors: 赵洪海
Original assignee: Zhao Honghai
Priority date: 2011-02-25
Filing date: 2012-02-20
Publication date: 2012-08-30
Also published as: CN102155310A

Abstract

Disclosed is a method for automobile fuel saving, which is based on preserving a normal control program of an automobile engine ECU, by the addition of a forced fuel saving control program to the automobile engine ECU, or by the installation of an externally-connected automobile engine ECU into which the forced fuel saving control program has been written, and at the same time by the installation of a forced changeover switch (K2), with the forced changeover switch (K2) switching control of the engine between the ECU normal control program and the forced fuel saving control program; or by installation of an automobile engine sensor signal-generation device, which inputs to the automobile engine ECU a sensor analog signal to effect fuel saving, and at the same time by the installation of the forced changeover switch (K2) used to switch between the input to the ECU from the original automobile sensor signal and that from the sensor analog signal. It adopts two control modes, so that the contradiction between the dynamic performance of the automobile and fuel economy is thereby solved, and the present method can be applied universally to any automobile with an electronically controlled engine.

Description

Automobile fuel saving method

Technical field

The invention belongs to the technical field of automobile fuel economy, and particularly relates to an automobile fuel saving method.

Background technique

The control principle of modern automotive electronically controlled fuel injection system is: electronic control unit (ECU According to the received engine speed signal, air flow sensor signal or intake pressure sensor signal, throttle position sensor signal, oxygen sensor signal and other input signals, after calculation, analysis, processing, according to ECU The fuel supply standard and the corresponding ignition time standard set by the control program for various operating conditions and load conditions of the engine, and the required fuel quantity and ignition time under the working condition and load of the engine are obtained, and corresponding The control command controls the fuel injection amount of the injector and ignites at the appropriate time. ECU The fuel supply standard and ignition time standard set by the control program are determined based on the engine's power, fuel economy, and emission requirements. However, there is a certain contradiction between engine power and engine fuel economy. If the engine is required to maintain sufficient power, The ECU control program sets a relatively high fuel injection standard. The engine consumes relatively high fuel consumption, and the fuel economy of the engine is relatively low. If the engine is required to maintain relatively high fuel economy, the ECU The control program is to set a relatively low fuel injection standard to provide a relatively economical fuel injection for the engine, which limits the engine's power. Modern car ECU The fuel supply standard of the control program is determined by ensuring the fuel economy and meeting the emission requirements while ensuring sufficient engine power. The pavement of modern urban roads is flat, but it has the characteristics of multiple speed limit, multiple red lights, multi-traffic cross-tracks and multi-congestion. Due to the limitation of this road environment, cars can only maintain low speed, and frequent brakes, start-ups and idle stops. In this context, the normal power performance of the car appears to be excessive, so the normal engine ECU The fuel supply standard provided by the control program has a certain waste of fuel in this realistic driving environment. Even if driving on a road outside the city, many drivers hope to get the most when the time is not tight. The economic driving effect, rather than the experience of the high speed and excellent rapid acceleration performance brought by the sufficient power of the car, the driver’s fuel-saving psychological desire and the urban real-life road environment characteristics make the engine retained. Based on the normal control program of the ECU, it provides a certain feasible space for the car to save fuel by increasing the engine ECU forced fuel-saving control program.

The research and application of automobile fuel-saving technology has always been the goal pursued by various automobile manufacturers, related research units and individuals. Modern automotive electronically controlled fuel injection systems are already well established technologies. The vehicle engine ECU control program and control parameters used by the powerful automobile manufacturers have reached a fairly classic level. It can be said that the engine's power output, the engine ECU's fuel injection standard and ignition time standard, idle speed The motor opening standards are perfect. From the perspective of fuel saving, the modification or interference of the original engine ECU control program will bring many disadvantages to the overall performance of the engine, and it will always be worth the loss. It is correct to respect and not allow changes to the control procedures of the original engine ECU. Constrained by the law of conservation of energy and the ideal air-fuel ratio, it is unrealistic to unilaterally adjust the oil and want to make the engine's dynamic performance and other performance related to the dynamic performance unaffected. Develop new high-performance engines, improve the high-tech content of various mechanical structures of the engine, improve the quality of the ECU and its control program software, accurately control the fuel injection, and enable the engine to obtain the best power effect under various working conditions. And the best concentration of the mixture, these are highly concerned by the automakers. The invention aims at establishing a fuel-saving scheme according to the requirements of the actual driving environment in the urban area and the fuel-saving psychological requirements of the driver driving the automobile during the operation of the automobile, and writing the fuel-saving control program to the automobile engine ECU. Implement this program.

By applying on the website of the China Intellectual Property Office, Chinese Patent Application No. 200910064069.X's patent application for the 'fuel-saving method to adjust the engine control parameters to the operating conditions of the vehicle', the patent application only gives an idea, and There are theoretical unclear and certain errors, which are specifically discussed in the following discussion: 1. Section 0004 of the section "In the fuel-saving method of adapting engine control parameters to vehicle operating conditions" (2) Engine ECU based on The difference between the speed and the speed of the vehicle determines the operating conditions of the vehicle's operating conditions. This discussion should be a wrong discussion, because the engine ECU' is based on the speed and speed when the engine is under load. The difference between the two 'only can determine which gear position in the gearbox, only 'depending on the relationship between the speed and the speed of the car' is not able to 'determine the operating conditions of the vehicle's operating conditions', In order to 'determine the operating conditions of the vehicle's operating conditions', at least the 'throttle position sensor' throttle position signal' or 'throttle pedal position' is required. The throttle position signal of the sensor '2, in the background section of paragraph 0002 in "Energy saving method for adjusting engine operating parameters to adapt to vehicle operating conditions", 'Electronic control engine can be controlled by preset methods and parameters For the operation of the engine, different parameters (including turbocharger parameters, fuel injection amount, fuel injection advance angle) determine the engine's characteristic curve, and also determine the fuel consumption rate of the engine under different working conditions. When these parameters are calibrated at the engine, no matter how the operating conditions of the vehicle change, the fuel economy of the engine has been determined and cannot be changed. 'The conclusion should be a wrong conclusion, because it is completely possible to implement the 'change' of the 'cannot change' content by rewriting the engine ECU control program or replacing the engine ECU written to a different control program; In paragraph 0004 of "Energy Saving Method by Adjusting Engine Control Parameters to Adapt to Vehicle Operating Conditions", (3) manually or automatically and by means, call the corresponding set of control parameters to make the engine run at a suitable level. Under conditions, to optimize fuel economy. 'The idea of using the automatic method to 'call the control parameters of the corresponding set' is disclosed here. This 'automatic mode' should be a wrong idea. The driver is driving the engine to work by stepping on the accelerator pedal while driving. When the engine ECU obtains the same throttle position sensor input signal, different sets of control parameters will enable the engine ECU to provide different fuel supply standards for the engine. Different oil supply quantities will change the output power of the engine. A high fuel supply will result in a larger power output. When the driver drives the car and keeps the gear position unchanged, the power output of the car engine is controlled by the driver's control of the throttle position. If the engine ECU automatically changes the control parameters of different sets, the engine ECU will use The driver will be able to control the driving of the car through the control of the throttle position. E.g: If the ECU selects different sets of control parameters, it will bring the same throttle position and the same throttle speed to produce different output power. However, the ECU selects different sets of control parameters but it is automatically completed, not the driver's own initiative. Choice, in theory, the automatic choice of ECU will give the driver the same power effect, but the throttle will produce a feeling of 'deep foot and one foot', which will cause the driver to control the throttle to a certain extent. Loss of accuracy, for example, when driving control such as rapid acceleration overtaking, deceleration turning, etc., if the ECU selects different sets of control parameters, the driver will use the same operation, but different engine power output results, which will drive the driver. Driving a car brings certain unsafe risks. From another point of view, the engine ECU needs to control the control parameters that should be selected for the same road condition, the same speed, the same gear position, and the same throttle position. The driver wants to save fuel. Psychological intentions should be the most important basis for ECU selection. Let ECU understand the driver's psychological intentions. It should be difficult to achieve under current technical conditions. Therefore, from the perspective of academic theory and real technology, 'automatic method' It should be a wrong idea.

technical problem

It is an object of the present invention to provide an automobile fuel economy method which retains an automobile engine ECU On the basis of the normal control program, a forced fuel-saving control program is added to the car engine ECU, or an external car engine ECU that is written into the forced fuel-saving control program is installed. At the same time, the forced transfer switch is installed, and the ECU normal control program and the forced fuel-saving control program are used to control the engine, or the automobile engine sensor signal generating device is installed as the automobile engine ECU. Input a sensor analog signal capable of generating a fuel-saving effect, and install a forced transfer switch to convert the input of the original vehicle sensor signal and the sensor analog signal to the ECU.

Technical solution

The technical solution of the present invention is as follows:

A vehicle fuel economy method comprising the steps of: (A) writing a normal control program and a forced fuel economy control program in an engine ECU; B) designing a pin that receives the compulsory switch signal in the ECU connector; (C) installing a coercive switch in the cab of the car; (D The control of the engine is selected by the forced fuel-saving control mode and the normal control mode by the on-off operation of the forcible switch.

The forced fuel-saving control program can be directly written to the original vehicle ECU or written to the external ECU.

The invention can also adopt the following technical solutions:

A vehicle fuel economy method includes the following steps: (A The oxygen sensor signal simulation device is connected to the original vehicle oxygen sensor circuit through the conversion relay, and the analog signal is adjusted to the most fuel-saving state that can ensure the safe and stable operation of the automobile in the urban area; (B ) install a forced transfer switch in the cab of the car; (C) connect the forcible switch, the switching relay, and the oxygen sensor signal simulation device with wires; (D The ECU adjusts the fuel injection amount by selecting the oxygen sensor signal or the oxygen sensor analog signal input to the ECU through a forcible switch.

Beneficial effect

The advantages of the invention are as follows: 1. Since two control modes are adopted, when the driver needs the car to perform strong power, the ECU normal control mode is used. When the driver wants to save fuel, the engine runs in the normal mode and appears to have excess power, through the manual transfer switch. Or the remote control device switches the ECU control mode to the forced fuel economy control mode, so it solves the contradiction between the power and fuel economy of the automobile; 2. The fuel saving method given by the present invention is applied to any of the electronically controlled engine vehicles. All are universal; 3. The application of the forced fuel-saving control mode is selected by the changeover switch, which retains all the design performance of the original vehicle, and does not cause any change or interference to all the design performance of the original vehicle during use; 4. Different embodiments of the present invention have Different installation cost, the user can choose according to their own economic ability and vehicle condition; 5. The invention The application of the car ECU connector harness conversion device enables different types of ECUs with the same function to be used interchangeably; 6. The present invention There is no unsafe hidden danger in the fuel economy of the car, and it can improve the quality of exhaust emissions.

DRAWINGS

1 is a block diagram showing the flow of Embodiment 1 of the present invention;

Figure 2 is a circuit schematic diagram of Embodiment 1 of the present invention;

3 is a schematic view showing the connection between the original vehicle ECU and the original vehicle ECU wiring harness according to Embodiment 2 of the present invention;

4 is a schematic view showing the connection of a new ECU for replacement and a new ECU harness according to Embodiment 2 of the present invention;

Figure 5 is a schematic view showing the new ECU of the second embodiment of the present invention being connected to the original vehicle ECU harness by the connector harness conversion device;

Figure 6 is a circuit schematic diagram of Embodiment 3 of the present invention;

Figure 7 is a block diagram showing the flow of Embodiment 4 of the present invention;

Figure 8 is a circuit diagram of Embodiment 4 of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the invention

Embodiment 1 It can be seen from FIG. 1 that an automobile fuel-saving method includes the following steps: (A) passing ECU Programming, writing the normal control program and the forced fuel-saving control program into the engine ECU at the same time; (B) designing the pin for receiving the transfer switch signal in the ECU connector; (C ) Install a forced transfer switch in the cab of the car; (D) Connect the ECU and the forced transfer switch with wires, and switch between the forced fuel control mode and the normal control mode by controlling the on/off operation of the switch.

The forced change switch can be equipped with a manual transfer switch on the center console, or a self-locking remote control switch can be installed in the vehicle, and the K-2DC type remote control switch produced by Zhangzhou Zhenhua Electronics Co., Ltd. can be used.

Using ECU The original control program controls the engine and can be called the normal control mode. The control of the engine using the forced fuel-saving control program can be called the forced fuel-saving control mode. The device that converts the normal control mode and the forced fuel-saving control mode can be called a forced transfer switch. The mandatory fuel-saving control mode is formulated according to the requirements of urban road environment driving and the most economical driving requirements on the road. Under the premise of ensuring that the car can operate safely and smoothly in urban road conditions, it is limited according to the road surface of the urban road. Speed, red light, multi-traffic cross-track, multi-congestion characteristics, car driving has many brakes, multiple starts, multiple idle parking, low-speed driving characteristics, ECU The normal control program's fuel supply standard, ignition time, idle speed, etc. are properly adjusted to give the engine economy first, providing the most economical fuel injection for the engine, and correspondingly adjusting the ignition timing to appropriately reduce the idle speed. The speed produces the most economical power output, limits the excess power output of the engine, avoids power waste, and reduces fuel consumption to save fuel. When the normal control mode is selected, the injector will inject the oil according to the normal fuel injection amount to obtain the normal fuel consumption; when the forced fuel economy mode is selected, the injector will spray the fuel according to the economic fuel injection amount to keep the idle speed running. Get the most economical fuel consumption.

It can be seen from Fig. 2 that the ignition switch K1 is closed, and the current of the battery E enters the injector N positive electrode, the ignition coil L positive electrode, and the ECU positive electrode from the positive electrode of the battery E through the ignition switch K1, and supplies power to the injector N, the ignition coil L, and the ECU. The current enters the injector N through the positive pole of the injector N, flows out from the negative pole of the injector N, enters the ECU, so that the working state of the injector N is controlled by the ECU, and the current enters the ignition coil L from the positive pole of the ignition coil L, From the negative pole of the ignition coil L, enter the ECU, so that the working state of the ignition coil is controlled by the ECU, the current enters the ECU through the positive pole of the ECU, supplies power to the ECU, and returns to the negative pole of the battery through the negative pole of the ECU to form a loop. At this time, the ECU enters a normal working state. The working state of various actuators such as the ignition coil L and the fuel injection 噐N is controlled, and the ECU supplies power to the water temperature sensor t ^o , the air flow sensor AF , the engine speed sensor n , and the throttle position sensor TPS simultaneously, and the ECU receives the Water temperature sensor t ^o , air flow sensor AF , engine speed sensor n , throttle position sensor TPS , oxygen sensor λ, etc. The input signal is subjected to calculation, analysis, and processing, and the injector N, the ignition coil L, and the idle motor M are controlled according to the operation result, and the ECU starts the corresponding according to the driver's selection intention according to the received forcible switch K2 signal. The control program controls the engine.

This embodiment is suitable for assembling an automobile in a manufacturing process.

Embodiment 2 A vehicle fuel economy method includes the following steps: (A) replacing an original vehicle ECU with a new ECU; (B By programming the new ECU, the normal control program and the forced fuel-saving control program are simultaneously written into the engine ECU; (C) installing a forced transfer switch in the cab of the car; (D) installing the ECU Connector harness conversion device, connect the new ECU to the ECU connector harness conversion device, and connect with the original car ECU wire connector; (E) the ECU The corresponding wire in the harness of the connector harness conversion device is connected with the forcible switch, and the switching between the forced fuel-saving control mode and the normal control mode is performed by controlling the on-off operation of the switch.

As can be seen from Figure 3, the original car ECU passes the original car ECU connector 1 and the original car ECU wire connector 2 and the original car The ECU harness 3 is connected; as shown in Figure 4, the new ECU for replacement is connected to the new ECU wire connector 5 and the new ECU harness 6 via the new ECU connector 4; 5 It can be seen that the ECU connector 4 of the new ECU is connected to the new ECU wire connector 5, and the original car ECU connector 1 and the original car ECU wire connector 2 are connected by the conversion harness 7. And the original car ECU harness 3 connection, the conversion harness 7 and the coercive switch K2 are connected by wires, thus achieving a successful replacement of different types of ECUs with the new ECU.

This embodiment is applicable to all cars that have been put on the market. Due to the current variety of automobile manufacturers and complex models, engine ECUs of various manufacturers It is different, often the same model, engine ECU has a variety of models, different models of ECU connector and pin function are always different, so different models of engine ECU It can't be used interchangeably. It is very expensive to use a wide range of ECUs to replace ECUs with the same connector and pin functions, but it can be fully functional and well-configured. The ECU, which writes a control program that matches the car's engine, is connected to the car's engine ECU wire connector through the connector harness switching device, which enables the ECU to be used with the selected ECU. The successful replacement, the application of the connector harness conversion device, greatly reduces the cost of replacing the ECU.

Embodiment 3 A vehicle fuel economy method comprising the following steps: (A) passing an ECU Programming, writing the forced fuel-saving control program to the external ECU; (B) connecting the external ECU and the switching relay to the original vehicle engine control circuit; (C ) Install a forced transfer switch in the cab of the car to switch between the forced fuel-saving control mode and the normal control mode by controlling the on/off of the forced transfer switch; (D The injector circuit, the ignition coil circuit, and the idle motor circuit are connected to the external ECU control circuit through the normally open contact of the switching relay.

It can be seen from Fig. 6 that when the ignition switch K1 is closed and the forcible switch K2 is closed, the battery E positive current is passed through the ignition switch. K1 to the forcible switch K2 closes the contact, supplies power to the switching relay J magnet coil, current passes through the switching relay J. The magnet coil positive pole enters the magnet coil, and returns to the battery E from the negative pole of the magnet coil Negative, at this time, the switching relay J normally closed contact is open, the normally open contact is closed, the original car ECU loses control of the injector N, the ignition coil L, the idle motor M, and the external ECU starts to the injector N The ignition coil L and the idle motor M are controlled, and the forced fuel-saving control program starts to control the operation of the engine; when the forced-change switch K2 is turned off, the switching relay J The magnet coil loses the supply current, the switching relay J normally open contact is closed, the normally closed contact is closed, and the normal control program of the original vehicle ECU starts to control the engine.

This embodiment is also applicable to all cars that have been put on the market. The external ECU only needs to have a forced fuel-saving control mode to ensure that the original car is not input. In the case where the sensor signal of the ECU is disturbed, It is connected to the engine speed signal, air flow sensor signal, throttle position sensor signal, oxygen sensor signal, etc., and is connected to the line of vehicle injector, ignition coil and idle motor control, in the original vehicle injector, ignition coil Adding a conversion line to the idle motor control line, and converting the original car by a forced transfer switch The ECU and the external ECU control the injector, idle motor and ignition coil. Since the external ECU only needs to write the forced fuel-saving control program, the configuration of the ECU is relatively low, and the cost is higher than that of the embodiment. 2 The cost is low, but the installation method is complicated.

Embodiment 4 As shown in Fig. 7, an automobile fuel saving method includes the following steps: (A The oxygen sensor signal simulation device is connected to the original vehicle oxygen sensor circuit through the conversion relay, and the analog signal is adjusted to the most fuel-saving state that can ensure the safe and stable operation of the automobile in the urban area; (B ) Install a forced transfer switch in the cab of the car; (C) Connect the forcible switch, switching relay, and oxygen sensor signal simulation device with wires (D) The ECU adjusts the fuel injection amount by selecting the oxygen sensor signal or the oxygen sensor analog signal input to the ECU through a forcible switch.

It can be seen from Fig. 8 that when the forcible switch is turned off, the ignition switch K is closed, and the current starts from the positive pole of the battery E through the ignition switch K. Enter the positive pole of the engine ECU, supply power to the ECU, the current returns to the negative pole of the battery through the negative pole of the ECU, the ECU starts to work, and the oxygen sensor signal is input to the ECU through the normally closed contact of the switching relay, ECU The engine fuel quantity is controlled according to the oxygen sensor signal, and the engine ECU controls the engine in the normal control mode; when the forcible switch is closed, the ignition switch K is closed, and the current is from the battery E. The positive pole starts to pass through the ignition switch K to supply power to the ECU, and the current passes through the ignition switch K to reach the forcible switch, and enters the three-terminal regulator 7805 pin and the conversion relay through the forcible switch. J's magnet coil is positive, current flows through 7805's 1 pin to 7805, current flows from 7805's 2 pin into battery E negative, forming a loop, while 7805's 3 The pin generates an output voltage of 5 volts, supplies power to the series resistor R, and obtains an oxygen sensor analog voltage signal from both ends of the resistor Rx. When the current passes through the forcible switch, the current passes through the switching relay J. The positive pole of the magnet coil enters the magnet coil, and returns from the negative pole of the magnet coil to the negative pole of the battery E. The relay relay J is normally closed, the normally open contact is closed, and the oxygen sensor analog voltage signal passes through the switching relay. The normally open contact is input to the ECU, so that the engine ECU adjusts the fuel injection amount to the engine according to the oxygen sensor analog voltage signal, thereby realizing the ECU's fuel economy control of the engine.

This embodiment is applicable to all electronically controlled engine vehicles. This scheme is the most economical, and the control effect is not as good as the above several schemes, but the fuel economy effect has been proved to be ideal by practice.

If the ECU of the market has been rewritable, the ECU's control program can be used to rewrite the ECU if the ECU is rewritable. The control program writes the normal control program and the forced fuel-saving control program into the ECU, and installs a wire or a pin on the ECU that can receive the signal identifying the transfer switch, installs a mode change switch in the vehicle, and connects the wires to realize the fuel-saving control. However, this requires that the storage space of the original car ECU is large enough, and it is necessary to be able to successfully install a wire or a pin for receiving the identification switch signal on the ECU.

Industrial applicability

Acceleration time standards and fuel consumption standards per 100 kilometers Both automotive manufacturers and automotive consumers have listed these two standards as important indicators. Any one of these two indicators will have a direct impact if they have shortcomings in similar products. Consumers choose this kind of car, so even though the fuel consumption per 100 kilometers of the car directly affects the most direct economic benefits of car consumers, each car manufacturer can not underestimate the engine's power performance, if the engine ECU Using the most economical fuel injection standard to control the fuel injection, one-sided emphasis on the economy of the car, this will directly affect the car's dynamic performance, so that the car in the same level of car becomes 'nothing', 'nature' car is certainly not Will be welcomed by consumers. The forced fuel economy control mode and the normal control mode can be used interchangeably to resolve the contradiction between vehicle power and fuel economy. Under the premise of not changing the already normal control mode at all, and without any interference to the operation of the normal control mode, relying on the driver's operation of the forced transfer switch, the engine The ECU's normal control mode and forced fuel-saving control mode are selected so that the driver has the right to choose the car to drive according to the normal design performance and drive in the forced fuel-saving mode, so the 'engine ECU The forced fuel economy control mode will be eligible to become the standard equipment for future electronically controlled fuel vehicles.

Sequence table free content

Claims

An automobile fuel-saving method, comprising: (A) writing a normal control program and a forced fuel-saving control program in an engine ECU; (B) designing a receiving forcible switch signal in an ECU connector Pins; (C) Install a forced transfer switch in the cab of the car; (D) Select the forced fuel control mode and the normal control mode to control the engine by the on/off operation of the forced transfer switch.
The automobile fuel-saving method according to claim 1, wherein the forced fuel-saving control program in the step (A) can be directly written into the original vehicle ECU or written into the external ECU.
An automobile fuel-saving method is characterized in that the method comprises the following steps: (A) inserting an oxygen sensor signal simulation device into an original vehicle oxygen sensor line through a conversion relay, and adjusting the analog signal to ensure safe and stable operation of the automobile in the urban area. (B) installing a forced transfer switch in the cab of the car; (C) connecting the cast switch, switching relay, and oxygen sensor signal simulation device with wires; (D) selecting the oxygen sensor signal through the forced transfer switch Or the oxygen sensor simulates the input of the signal to the ECU to control the ECU's adjustment of the fuel injection amount.