KR19990031680U - Fuel injection volume control - Google Patents

Abstract

Detects vehicle information by detecting the information of a running vehicle by correcting the set idle target RPM by increasing the fuel injection amount according to the occurrence frequency of ENGIN STALL caused by the imbalance of fuel injection amount during engine idle or deceleration operation. Means, a throttle valve position sensor for detecting the opening amount of the throttle valve, a vehicle speed sensor for detecting the acceleration and deceleration of a running vehicle, and an idle RPM variable according to the state of the engine during idling or sudden deceleration to adjust the fuel injection amount. Control means for controlling the overall operation to increase, and an injector for injecting fuel into the engine combustion chamber in accordance with the signal applied from the control means consisting of a variable idle idle value by setting the target idle RPM value as the performance or condition of the engine deteriorates Prevents engine stoppages that occur during sudden deceleration. To prevent major accidents from occurring, and can reduce the economic and industrial losses.

Description

Fuel injection volume control

The present invention relates to a fuel injection amount control device, and more particularly, fuel injection amount by correcting the idle target RPM set according to the occurrence frequency of the engine stop (ENGIN STALL) caused by the imbalance of the fuel injection amount during engine idle or deceleration operation. It relates to a fuel injection amount control device for increasing the amount.

In general, the fuel injection amount control device supplies an optimum fuel amount to the engine according to a signal applied from various sensors provided in the vehicle. In the conventional fuel injection amount control device, the fuel injection amount supplied to the engine during engine idle or sudden deceleration is provided. The control operation will be described with reference to FIG. 3 as follows.

The control unit 30 sets the target idle RPM correction value in the memory table (step 100) in the vehicle driving to a predetermined destination (step 100), and opens the throttle valve according to the signal applied from the throttle position sensor 10. It is determined whether the opening degree of the throttle valve is '0%' by detecting the quantity of the door (step 110).

If it is determined in step 110 that the opening amount of the throttle valve is '0%', it is determined whether the fuel injection amount is controlled according to the target idle RPM correction value set in the memory table of the controller 30 (step 120).

If it is determined in step 120 that the fuel injection amount is controlled according to the target idle RPM correction value, the engine operates normally to maintain the start state (step 130). If it is determined that the fuel injection amount is not controlled according to the target idle RPM correction value, the throttle valve is The engine is stopped and the engine is stopped at '0%' (step 140).

As described above, the target idle RPM corrected at the time of engine idle or deceleration is fixed to a constant value in the memory table of the controller, and when the engine performance or condition is deteriorated, the idle idle RPM corrected is too low to maintain engine starting. There is a problem that the engine is often stopped because it does not.

The present invention has been made in view of the above-described problems, and its purpose is to increase the fuel injection amount by variably setting the target idle RPM as the performance or condition of the engine deteriorates, thereby preventing engine shutdown occurring during idling or rapid deceleration. It is to prevent.

The present invention for achieving the above object is a vehicle information detection means for detecting information of the vehicle being driven;

A throttle valve position sensor for detecting an opening amount of a throttle valve;

A vehicle speed sensor detecting an acceleration / deceleration of the vehicle being driven;

Control means for controlling the overall operation of increasing the fuel injection amount by setting a correction idle RPM variably according to the state of the engine during idling or rapid deceleration;

Characterized in that the injector for injecting fuel to the engine combustion chamber in accordance with the signal applied from the control means.

1 is a block diagram showing a fuel injection amount control apparatus according to an embodiment of the present invention.

2 is a flowchart of one embodiment for performing fuel injection amount control in the embodiment of the present invention of FIG.

3 is a flowchart of one embodiment for performing conventional fuel injection amount control.

Explanation of symbols for main parts of the drawings

10: vehicle information detection unit

20: Throttle Valve Position Sensor

30: vehicle speed sensor

40: control unit

50: injector

Below. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As can be seen in Figure 1 the fuel injection amount control apparatus according to an embodiment of the present invention is a vehicle information detection unit 10, a throttle position sensor 20, a vehicle speed sensor 30, a control unit 40, an injector 50, the vehicle information detection unit 10 detects information of a vehicle being driven and outputs a predetermined electrical signal corresponding thereto.

The throttle position sensor 20 detects the opening amount of the throttle valve and outputs a predetermined electrical signal corresponding thereto.

The vehicle speed sensor 30 detects an acceleration / deceleration state of a driving vehicle and outputs a predetermined electrical signal corresponding thereto.

The control unit 40 outputs a control signal for controlling the overall operation of increasing the fuel injection amount by setting the correction idle RPM variably according to the state of the engine during idling or sudden deceleration.

The injector 50 injects fuel into the engine combustion chamber according to the signal applied from the control unit 40.

In the present invention having the function as described above, the operation of controlling the fuel injection amount supplied to the engine during idle or sudden deceleration will be described with reference to FIG. 2.

In the vehicle driving to a predetermined destination, when the vehicle is idle or suddenly decelerated, the controller 40 detects a vehicle state according to a signal applied from the information detector 10 of the vehicle and sets the target idle RPM in the memory table (step 200).

Thereafter, the controller 20 determines whether the throttle valve is fully closed and the opening amount of the throttle valve is detected as '0%' according to the signal applied from the throttle position sensor 20 (step 210).

If it is determined that the opening amount of the throttle valve detected in step 210 is '0%', it is determined whether the fuel injection amount is controlled according to the target idle RPM set in the memory table of the control unit 40 (step 220).

If the fuel injection amount is controlled according to the target idle RPM in step 220, the engine operates normally to maintain the starting state (step 230). If it is determined that the fuel injection amount is not controlled according to the target idle RPM correction value, the amount of fuel supplied to the engine is unstable. It is controlled so that the engine cannot be maintained and the engine is stopped (step 240).

At this time, by counting the number of times the engine stops when the engine RPM reaches '0%' (step 250), it is determined whether the engine stops three or more times (step 260).

If it is determined in step 250 that the number of engine stops is three or more times, the controller 40 outputs a control signal to the injector 50 to correct the target idle RPM to increase the fuel injection amount (steps 270 to 280).

Therefore, the injector 50 increases the amount of fuel supplied to the engine according to the signal applied from the control unit 40 and injects it (step 280).

On the other hand, when the condition of step 220 and step 250 is not satisfied, the program set in the memory table of the control part 40 is repeatedly performed.

As described above, the present invention variably sets the target idle RPM value as the performance or condition of the engine deteriorates, thereby preventing the engine from occurring during idling or rapid deceleration, thereby preventing a large accident caused by the engine stopping while driving. Economic and industrial losses.

Claims (2)

In the fuel injection amount control apparatus, Vehicle information detecting means for detecting information of the vehicle being driven; A throttle valve position sensor for detecting an opening amount of a throttle valve; A vehicle speed sensor detecting an acceleration / deceleration of the vehicle being driven; Control means for controlling the overall operation of increasing the fuel injection amount by setting a correction idle RPM variably according to the state of the engine during idling or rapid deceleration; And an injector for injecting fuel into an engine combustion chamber in accordance with a signal applied from the control means. The fuel injection amount control device according to claim 1, wherein the control means corrects the target idle RPM set in the memory table when the engine stop is detected for a predetermined number of times or more.