KR19980035638A - Extra fuel injection increase device during acceleration and its control method - Google Patents

Abstract

The present invention relates to an apparatus for increasing fuel injection amount during acceleration and a control method thereof. The controller 40 determines whether there is a signal sequentially output from each sensor of the sensor unit 30 from the start of the operation for fuel injection. To compare the injection speed during acceleration against the basic injection amount of the extra injection amount, compare the engine load during acceleration with respect to the engine load of the extra injection amount, and compare the vehicle speed during acceleration with respect to the set speed. By calculating the extra injection amount from the determination of whether the engine is running, the user can arbitrarily increase the fuel injection time of the injector so that the fuel injection can be facilitated and the acceleration and exhaust gas control can be easily performed, and the problem of the air-fuel ratio is solved. To provide.

Description

Extra fuel injection increase device during acceleration and its control method

The present invention relates to an extra fuel injection amount increasing device during acceleration and a control method thereof. More specifically, the fuel injection time of the injector is determined by the user of the vehicle until the control section of the vehicle determines the transition zone of acceleration. The present invention relates to an extra fuel injection amount increasing device for accelerating fuel injection control by increasing a predetermined amount and a control method thereof.

1 is an overall block diagram of a fuel injection device according to a conventional embodiment, Figure 2 is a block diagram of a fuel injection device according to a conventional embodiment.

A conventional conventional fuel injection device is disclosed in (Japan; Utility Model Publication No. 94-1682), and as shown in the block diagram shown in FIG. 1, the engine is mounted in a vehicle such as an automobile, and the air cleaner is used for the air cleaner. (14), the throttle valve 15 is sucked through the surge tank 16 in order. However, when idle (idling), the throttle valve 15 is closed, and the degree of opening of the bypass passage bypassing the throttle valve 15 is a thermowax type fast idling valve. The amount of combustion air according to the opening degree is supplied to the engine. In addition, the fuel supplied from the fuel tank 18 to the fuel pump 19 and adjusted to a predetermined injection fuel pressure by the fuel pressure regulator is supplied by simultaneous injection via the injector 20 installed corresponding to each cylinder of the engine. It is sucked into the engine by the intake.

The ignition signal at the time of ignition is supplied to the required ignition plug (not shown) disposed in each cylinder of the engine via the ignition driving circuit 21, the ignition coil, and the distributor.

The exhaust gas after combustion is discharged to the atmosphere via an exhaust manifold or the like.

The crank angle sensor 1 for detecting the rotational speed of the crankshaft of the engine, and the crank sensor 1 is a frequency pulse signal according to the rotational speed (for example, a pulse signal falling to the corresponding TDC at BTDC 70 ° (crank angle signal )]. It is installed in the cooling water temperature sensor (2) for detecting the cooling water temperature of the engine, the throttle position sensor (3) for detecting the opening degree of the throttle valve (15), and the surge tank (16). Pressure sensor (4) that outputs a pressure detection signal according to the intake pipe pressure.It is installed in the surge tank and installed in the intake air temperature sensor (5) and exhaust manifold that detects the temperature of the intake air. The detection signal of the air-fuel ratio sensor 6 to detect, the idle switch 7 to detect that the throttle valve is closed when idle, the crank angle sensor 1 to the air-fuel ratio sensor 6 and the idle switch 7 are electronically controlled. The control unit 13 determines the fuel injection amount based on the detection signals thereof and controls the valve opening time of the injector 20 to adjust the injection fuel amount or to control the ignition driving circuit 21. Drive control To.

FIG. 2 is a detailed internal configuration diagram of the control unit shown in FIG. 1. The control unit 13 controls the microcomputer 10 (hereinafter referred to as a microcomputer) and pressure detection signals from the pressure sensor 4 which perform various calculations or determinations. Analogue detection circuit 8 for reducing ripple, analogue detection signal of cooling water temperature sensor 2, throttle position sensor 3, intake air temperature sensor 5 and air-fuel ratio sensor 6 or output signal of analogue filter circuit 8 It consists of a drive circuit for driving the injector 20 of the A / D converter 9 which in turn converts into digital values. In the microcomputer 10, each input port is connected to the output terminals of the crank angle sensor 1, the idle switch 7, and the A / D converter 9, and each output port is an A / D converter for transmitting a reference signal. It is connected to (9) and also to the input terminal of the drive circuit. In addition, the microcomputer 10 is configured of a control unit 13 that performs various calculations and determinations.

The conventional fuel injection device configured as described above has the A / D converter 9 of the control unit 13 performing A / D conversion of the output signal of the throttle position sensor 3 to the A / D converter 9 to open the throttle of the session. The degree is obtained and stored in the control unit 13. The difference between the current throttle opening degree and the previous throttle opening degree is calculated and stored in the first throttle opening degree change amount.

It is determined whether or not the first throttle opening degree change amount is greater than or equal to the predetermined rapid acceleration determination threshold.

The difference between the throttle opening degree of the session and the rotation throttle opening degree value before the session is calculated to calculate the change amount of the second throttle opening degree.

The slow determination threshold according to the throttle opening degree calculates the asynchronous supply change amount based on the first acceleration speed change and the second throttle opening degree change amount after determining the normal acceleration condition and the normal birth condition. When the throttle opening change is detected, the second throttle opening degree change is used when detecting the full acceleration, and an integer corresponding to the rapid acceleration or slow acceleration detection is multiplied by the first throttle opening degree change or the second throttle opening degree change amount. will be.

Therefore, the control unit 13 reads and calculates the fuel amount driving time conversion coefficient and waste time of the injector 20, detects the asynchronous driving time of the injector 20, sets the injector asynchronous driving time to the timer, and sets a timer. By operating for a time to inject the fuel to the engine in the injector 20.

However, the conventional fuel injection device that operates in this way has a fixed ratio because the fuel injection is injected at a constant ratio after the fuel injection is asynchronously injected for each cylinder by the injector when the control unit determines the acceleration determination. Since the experimenter could not adjust arbitrarily, the air-fuel ratio of the transition zone during the acceleration judgment was lean, which caused problems in acceleration and exhaust gas control.

The present invention has been made to solve such a conventional problem, the purpose of which is to determine the transition zone of acceleration until the fuel control time of the injector to determine the non-acceleration zone conditions of the user's arbitrarily It is to facilitate acceleration and exhaust gas control by increasing the amount of fuel to be able to spray fuel.

The configuration of the present invention for achieving the above object is a sensor unit consisting of a throttle position sensor, a vehicle speed sensor, a water temperature sensor, an engine load sensor, an engine rpm sensor, and the like, and is distributed by a signal input from the sensor unit A control unit for controlling the fuel injection amount compared to the extra fuel injection data stored in the fuel injection drive unit for outputting a pulse signal for driving the injector in accordance with the control signal input from the control unit;

It is composed of an injector unit which is driven according to the pulse signal input from the fuel injection driving unit so that fuel is injected directly into the cylinder.

An object of the present invention for achieving the above object is to start the operation for fuel injection, detecting the open state of the throttle valve, detecting the vehicle speed from the above step, Detecting cooling water temperature from one step, detecting a change in engine load from the time-stage from the above step, detecting a rotation speed change of the engine from the above step, and whether the controller is accelerating from the above step Determining a step of comparing the injection amount during acceleration with respect to the basic injection amount of the extra injection amount from the above step, and comparing the engine load during acceleration with respect to the engine load of the extra injection from the above step. And comparing the vehicle speed at the time of acceleration with respect to the set speed from the above step, and whether the engine is driven from the above step Determining and, to call a feature that it comprises a step of calculating the extra injection quantity from the one level.

The configuration of the present invention for achieving the above object is a method of calculating the extra injection amount is 2, constant (interjection injection ratio), and extra injection amount based on the change amount of the engine load per hour, the rotation angle of the four-stroke engine of the engine And multiplying all data 멥 (water temperature continuous injection).

1 is an overall block diagram of a fuel injection amount device according to a conventional embodiment.

2 is a block diagram of a fuel injection amount device according to a conventional embodiment.

3 is an overall block diagram of a device for increasing fuel injection amount during acceleration according to an exemplary embodiment of the present invention.

4 is a flowchart illustrating a method of increasing an extra fuel injection amount during acceleration according to an exemplary embodiment of the present invention.

Code descriptions for the main parts of the drawings

1; crank angle sensor 2; cooling water temperature sensor

3; trottle position sensor 4; pressure sensor

5; intake air temperature sensor 6; performance ratio sensor

7; Idle switch 8; Analog filter circuit

9; A / D converter 10; Microcomputer

11; drive circuit 12; injector

13, 40; control unit 14; energy cleaner

15; throttle valve 16; surge tank

17; Idle valve 18; Fuel tank

19; fuel pump 20; injector

21; ignition driving circuit 30; sensor

50; fuel injection drive unit 60; injector unit

The term "extra injection amount" in the present specification includes the injection of a larger amount of fuel than the fuel injection of the model by increasing the predetermined amount of fuel injection time of the injector defined below.

Hereinafter, the technical configuration of the present invention by the accompanying drawings in detail.

3 is an overall block diagram of an extra fuel injection amount increasing device during acceleration according to an embodiment of the present invention, and FIG. 4 is a flowchart of a method of increasing an extra fuel injection amount during acceleration according to an embodiment of the present invention.

When the transition zone of acceleration is determined as shown in FIG. 3, the present invention allows the user to arbitrarily increase the fuel injection time of the injector until the control unit 40 of the vehicle determines the non-accelerated zone condition, thereby allowing the fuel injection. To easily satisfy the acceleration and exhaust gas control, the sensor unit 30 for connecting the throttle position sensor, the vehicle speed sensor, the water temperature sensor, the engine load sensor, the engine rpm sensor, and the output from the sensor unit 30 A control unit 40 for connecting a signal to be input, a fuel injection driver 50 for inputting a signal output from the control unit 40 to output a pulse signal, and the fuel injection driving unit 50. It is composed of an injector unit 60 that is driven in accordance with the pulse signal input from the () to allow fuel to be injected directly into the cylinder.

The control unit 40 calculates the amount of extra fuel injection by executing a program set therein to increase the time for injecting the extra fuel into the injector in the transition zone during acceleration by inputting the signal output from the sensor unit 30. It is characterized in that for outputting the signal calculated by the fuel injection drive unit (50).

According to the present invention, in the method for increasing the amount of extra injection during acceleration, as shown in FIG. 4, a step of determining whether there is a signal sequentially outputted by each sensor of the sensor unit 30 from the start of the operation for fuel injection. (S1), the step (S2) of determining whether the controller 40 is accelerating from the step (S1), and the injection amount at the time of acceleration against the basic injection amount of the extra injection amount from the step (S2) Step S3, comparing the engine load at the time of acceleration with respect to the engine load of the extra injection from the step S3, and step S4, and the acceleration at the speed with respect to the set speed from the step S4 as described above. Comparing the vehicle speed (S5), the step (S6) for determining whether the engine is running from the step (S5), and the step (S7) for calculating the extra injection amount from the step (S6) Characterized in that.

Referring to the effects of the present invention configured as described above in detail.

The present invention is to enable the fuel injection by increasing the user's fuel injection time of the injector arbitrarily until the control unit 40 of the vehicle determines the non-accelerated zone condition as shown in Figure 3 and 4, the step ( In S1), the vehicle proceeds gradually to start an operation for injecting fuel through the injector unit 60.

When the operation of the fuel injection is started, the control unit 40 inputs signals output from the throttle position sensor, the vehicle speed sensor, the coolant temperature sensor, the engine load sensor, and the engine rpm sensor of the sensor unit A / D. It can be converted and compared with the built-in program.

The program in the control unit 40 is stored in data so that the experimenter can operate the fuel injection driving unit 50 and increase the amount of fuel injection time in the injector unit 60 at will.

It is determined whether a signal output by each sensor of the sensor unit 30 is input to the input terminal of the control unit 40 and output to the fuel injection driving unit 50 by an internal program. If there is no signal output from the sensor, the control unit 40 does not send a control output signal (step S1).

In step S2, the control unit 40, which receives and stores signals sequentially output from each sensor of the sensor unit 30, determines whether it is an acceleration. During acceleration, a stroke valve opens to maximize the intake pipe pressure. As the fuel amount increases by the increased pressure, the air-fuel ratio is lean, and the input of the change amount of the engine load and the output signal of the sudden rise output from the coolant temperature sensor is judged.

In step S3, when it is determined that the extra injection amount for the fuel injection provided to the vehicle in progress is small compared with the injection amount at the time of acceleration, the process proceeds to the next step S4.

In step S4, the control unit 40 inputs a signal by a signal output from the throttle position sensor in the sensor unit 30. When the throttle valve is opened, the intake pipe pressure is increased and the amount of fuel attached is increased by the amount. Because of its leanness, fuel is increased more than usual.

Therefore, the engine load change amount is obtained by the output of the throttle position sensor that detects the engine speed and whether the throttle valve is closed.

At this time, the controller 40 compares the magnitude of the change amount with respect to the engine load with respect to the set extra injection amount and the change size with respect to the engine load during acceleration, and determines that the engine load during acceleration is large to proceed to step S5. But if it is small, the operation of the sensor unit 10 that is the initial step (S1) to be made.

In step S5, the control unit 40 accelerates the set speed of the vehicle proportional to fuel injection and the digital pulse signal output from the vehicle speed sensor of the sensor unit 30 to the injector unit 60 having data set therein. By entering and comparing the speed, it is determined if the current vehicle speed is large to prepare extra injection conditions.

In step S6, the controller 40 calculates the fuel injection amount by receiving the output signal of the engine driving sensor to determine whether the engine is driven and generating power.

In step S7, the fuel extra injection amount calculated by the controller 40 is multiplied by the fuel injection rate to be injected from the signal output from the coolant temperature sensor by the change amount of the engine load per unit time, and then the cycle of the 4-stroke engine drive unit is taken into account. To multiply by 2 and then multiply by a constant to inject fuel into the injector unit 60.

The present invention which acts as described above can determine the transition zone of acceleration and increase the fuel injection time of the injector by user's arbitrary amount of fuel until the control section of the vehicle determines the condition of the non-acceleration zone, so that the acceleration and exhaust gas control can be controlled. Ease of use is to provide an effect that solves the problem of non-performance.

Claims (3)

In the apparatus for increasing the amount of extra fuel injected during acceleration, the sensor unit 30 composed of a throttle position sensor, a vehicle speed sensor, a coolant temperature sensor, an engine load sensor, an engine rpm sensor, and the like, and the sensor unit ( The controller 40 controls the fuel injection amount to be calculated by comparing the spare fuel injection data stored therein by the signal input from 30, and drives the injector according to the control signal input from the controller 40. It includes a fuel injection drive unit 50 for outputting a pulse signal for driving and the injector unit 60 is driven in accordance with the pulse signal input from the fuel injection drive unit 50 to inject fuel directly into the cylinder. Extra fuel injection increase device during acceleration. In the method for increasing the amount of extra injection during acceleration, determining whether there is a signal sequentially outputted by each sensor of the sensor unit 30 from the start of the operation for fuel injection (S1) and the above-described step ( Step S2 of determining whether the controller 40 is accelerating from S1, comparing the injection amount at the time of acceleration with respect to the basic injection amount of the extra injection amount from the step S2, and the above step Comparing the engine load at the time of acceleration with respect to the engine load of the extra injection from (S3) (S4), and comparing the vehicle speed at the time of acceleration with respect to the set speed from the above (S4) (S5), A step (S6) of determining whether the engine is being driven from the step (S5), and a step (S7) of calculating the extra injection amount from the step (S6). Incremental Control Method. The spare fuel injection amount calculated by the control unit 40 in step S7 is 2 based on the change amount of the engine load per hour, the rotation angle of the four-stroke engine of the engine, the constant (injector injection ratio), An extra fuel injection amount increase control method when accelerating, characterized by multiplying the extra injection amount data 멥 (water temperature continuous injection).