KR20030012124A - Automobile idling control system and method thereof - Google Patents

Abstract

PURPOSE: An idle air amount control system for a vehicle and method thereof are provided to reduce an rpm and DP air amount to an idle basic lower point in a short period without a tip-out shock when an engine is in an idle state. CONSTITUTION: An operation method of an idle air amount control system for a vehicle is driven by an ECU(Electric Control Unit). An engine recognizes the idle state with the positional information of an accelerator pedal by the ECU. The ECU generates signals for controlling to divide a DP air amount into multi-stages and reduce to an idle starting point and signals for controlling a throttle-opening amount, correspondingly. Thus, the data corresponding to a DP air amount is determined with the degree of freedom larger than that of the ETS(Electronic Throttle Sensor) applying system.

Description

Idle air volume control system of vehicle and its method {AUTOMOBILE IDLING CONTROL SYSTEM AND METHOD THEREOF}

The present invention relates to an automobile, and more particularly, to an idle air amount control system and a method of an automobile.

The vehicle's idle air flow control system detects the engine's surroundings and goes into idling while driving, so that all the devices installed in the vehicle can reduce the engine speed to the reference low point (or idle base air volume) in a short time. Say it. In general, the ECU (Engine Control Unit) receives information on the vehicle speed, engine rpm, cooling water temperature, Excel pedal position, and the like, and when idle, calculates an initial value of DP (Dash Pot) air volume from the Excel pedal position information, which is linear. The slope decreases the DP air volume and controls the opening of the Throttle Position Sensor (TPS).

However, unlike a vehicle equipped with a general ISA (Idle Speed Actuator), the air-fuel ratio control, that is, the idle air amount control is very important in a vehicle using an electronic threshold sensor (ETS). However, when the DP air amount is linearly reduced in one dimension as in the prior art, it takes a long time to reduce to the idle basic air amount in a situation having a large DP air amount initial value depending on the engine operating state, or 1 second draft according to domestic law. Returning to the idle driving condition causes significant shock at tip out. In addition, when the initial value of the DP air amount is large, the rpm value accordingly is also larger than the idle basic rpm, which causes unnecessary fuel consumption.

Therefore, when the engine is in the idle state, the idle air amount control step is renewed so that the vehicle can transition to the idle state quickly.

1 is a block diagram illustrating an ECU of a vehicle driving an idle air amount control system of a vehicle according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a process of controlling an air amount by determining whether an idle state is performed when an engine of a car is operating in an idle air amount control system of a vehicle according to an exemplary embodiment of the present invention.

3 is a graph illustrating an air amount control step from an idle start point in an idle air amount control system of a vehicle according to an exemplary embodiment of the present invention.

In order to achieve such a technical problem, the idle air amount control system of an automobile according to a feature of the present invention, in the idle air amount control of a vehicle engine in operation, receives the accelerator pedal position information and, when the engine is in the idle state, And an ECU for generating a signal for controlling the DP air amount at the idle starting point to be reduced to the idle basic DP air amount and a signal for controlling the throttle opening amount correspondingly.

The multi-stage DP air volume reduction is from the DP air volume at the idle starting point to the first critical DP air volume,

(DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β1 is the first DP air decrease amount per predetermined time)

To decrease, and from the first critical DP air volume to the second critical DP air volume, decreases in a jump form, and from the second critical DP air volume,

(DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β2 is the second DP air decrease amount per predetermined time)

It characterized in that the reduction to satisfy.

Accordingly, in the idle air amount control system according to the embodiment of the present invention, in the idle air amount control of the vehicle engine in operation, the ECU receives the accelerator pedal position information, recognizes that the engine is in the idle state, From the DP air volume at the start point to the first critical DP air volume,

(DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β1 is the first DP air decrease amount per predetermined time)

The first critical DP air amount to the second critical DP air amount are reduced in a jump form, and from the second critical DP air amount,

(DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β2 is the second DP air decrease amount per predetermined time)

It is possible to generate a signal for controlling to reduce while satisfying the control and the throttle opening amount corresponding thereto.

A driving method of an idle air amount control system of a vehicle according to a feature of the present invention is a driving method of an idle air amount control system of a vehicle engine operated by an ECU.

(a) the ECU receiving the accelerator pedal position information, and the engine recognizing an idle state; And

(b) generating, by the ECU, a signal for controlling the DP air amount at the idle starting point to be reduced to the idle basic DP air amount and a signal for controlling the throttle opening amount correspondingly.

The multi-stage DP air volume reduction is from the DP air volume at the idle starting point to the first critical DP air volume,

(DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β1 is the first DP air decrease amount per predetermined time)

To decrease, and from the first critical DP air volume to the second critical DP air volume, decreases in a jump form, and from the second critical DP air volume,

(DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β2 is the second DP air decrease amount per predetermined time)

It characterized in that the reduction to satisfy.

Hereinafter, with reference to the accompanying drawings, the specific configuration and operation of the idle air amount control system of a vehicle according to the most preferred embodiment that can be easily implemented by those of ordinary skill in the art. Explain.

1 is a block diagram illustrating an ECU for driving an idle air amount control system of a motor vehicle according to an embodiment of the present invention.

The idle air amount control system of a vehicle according to an exemplary embodiment of the present invention is mounted in a vehicle to detect an engine surrounding state of the vehicle and become idle during driving, so that the engine speed can be reduced to a reference low point in a short time. Say all the devices.

As shown in FIG. 1, an ECU for driving an idle air amount control system according to an embodiment of the present invention receives vehicle speed information from a vehicle speed sensor, rpm information from an engine speed sensor, and coolant from an engine coolant temperature sensor. The controller receives the on information, receives the accelerator pedal position information from the accelerator position sensor (APS), and generates a DP air volume control signal and a thrust position sensor (TPS) control signal.

In particular, in the control of the vehicle engine in operation, the ECU receives the accelerator pedal position information, and when the engine is in the idling position, a signal for controlling the DP air volume at the idle starting point to be divided into the idle basic DP air volume in multiple stages. And correspondingly, a signal for controlling the throttle opening amount is generated.

Here, from the DP air amount at the idle start point to the first critical DP air amount,

(DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β1 is the first DP air decrease amount per predetermined time)

To decrease, and from the first critical DP air volume to the second critical DP air volume, decreases in a jump form, and from the second critical DP air volume,

(DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β2 is the second DP air decrease amount per predetermined time)

Decrease to satisfy.

The operation of the idle air amount control system of the vehicle according to the embodiment of the present invention having such a structure will be described in more detail.

FIG. 2 is a flowchart illustrating a process of controlling an air amount by determining whether an idle state is performed when an engine of a car is operating in an idle air amount control system of a vehicle according to an exemplary embodiment of the present invention.

When the driver turns on the driving of the car and is driving, the engine is in an operating state (S100), and a temporary stop occurs when a red signal of a traffic light or a road is crowded with cars. At this time, the ECU continuously determines whether the engine is in the idling position from the accelerator pedal information (S110), and recognizes that the idling state reduces the DP air amount and generates a signal for controlling the throttle opening amount accordingly. Let's go. If the engine is not in the idle state (S180), since the engine is in the continuous operation (S100), while driving the vehicle, the ECU determines whether the vehicle is in the idle state (S110).

When the engine is in the idle state, as shown in Fig. 2, the ECU starts from the DP air amount, i.e., the DP air amount initial value of the idle starting point of the current vehicle in operation, and thus, the first critical DP air amount Th1 and the second critical DP. A control signal is generated to gradually reduce the DP air amount through the air amount Th2 to the idle basic air amount.

At this time, if the current DP air amount is larger than the idle basic air amount (S120), it is determined whether it is larger than the first critical DP air amount Th1 (S130), and if it is large, the next DP air amount n is set to the current DP air amount n−. Set the time in 1) (for example, 0.1 seconds) to repeat the loop to decrease by β1 (S120 ~ S140). That is, from the DP air amount at the idle start point to the first critical DP air amount,

(DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β1 is the first DP air decrease amount per predetermined time)

Will be reduced to satisfy.

When the current DP air amount is greater than the idle basic air amount (S120) and the same as the first critical DP air amount Th1 (S150) due to the above DP air amount reduction, the ECU jumps the next DP air amount n to the second critical DP. The control signal is generated to be the air amount Th2.

Next, the ECU decreases the next DP air amount n by a time (for example, per 0.1 second) from the second critical DP air amount Th2 to the idle basic air amount by a time (for example, per 0.1 second) at the current DP air amount n-1. Repeat the loop as much as possible (S120 ~ S170). In other words,

(DP air amount n is the next DP air amount, DP air amount (n-1) is the current DP air amount, β2 is the second DP air decrease amount per predetermined time)

Will be reduced to satisfy.

In the above, the time for reducing the DP air amount from the DP air amount at the idle start point to the idle basic air amount is limited to 1 second according to domestic legislation, as shown in FIG. 3, so that β1 and β2 are DP air amounts reduced for about 0.5 seconds. Becomes By the way, in order to prevent tip out shock, it becomes possible by making small the decrease inclination from the DP air amount at an idle starting point to a 1st threshold DP air amount.

As described above, the idle air amount control system of the vehicle according to the embodiment of the present invention, in the idle air amount control of the vehicle engine in operation, the ECU receives the position of the accelerator pedal, the engine is in the position to the idle state Recognizing that, from the DP air volume at the idle starting point to the first critical DP air volume,

(DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β1 is the first DP air decrease amount per predetermined time)

The first critical DP air amount to the second critical DP air amount are reduced in a jump form, and from the second critical DP air amount,

(DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β2 is the second DP air decrease amount per predetermined time)

It is possible to generate a signal for controlling to reduce while satisfying the control and the throttle opening amount corresponding thereto.

The invention is susceptible to various modifications and implementations without departing from the scope of the claims set out below.

As described above, according to the embodiment of the present invention, it is possible to reduce the rpm and DP air amount to the idle base low time in a short time without tip out shock when the engine is in the idle state, and more for the ETS application system. You can select DP air volume related data with degree of freedom.

Claims (4)

In controlling the idle air amount of the vehicle engine in operation, When the engine is in the idling position by receiving the accelerator pedal position information, it generates a signal for controlling the DP air amount at the idle starting point to be reduced to the idle basic DP air amount and a signal for controlling the throttle opening amount correspondingly. ECU letting Idle air volume control system of a car comprising a. The method of claim 1, The multi-stage DP air amount reduction is, From the DP air volume at the idle start point to the first critical DP air volume, (DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β1 is the first DP air decrease amount per predetermined time) To decrease, and from the first critical DP air volume to the second critical DP air volume, decreases in a jump form, and from the second critical DP air volume, (DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β2 is the second DP air decrease amount per predetermined time) Decreasing to satisfy Idle air volume control system of a car, characterized in that. In a driving method of an idle air amount control system of a vehicle engine operated by an ECU, (a) the ECU receiving the accelerator pedal position information, and the engine recognizing an idle state; And (b) generating, by the ECU, a signal for controlling the DP air amount at the idle starting point to be reduced to the idle basic DP air amount and a signal for controlling the throttle opening amount correspondingly; Method of driving an idle air amount control system of a car comprising a. The method of claim 3, wherein The multi-stage DP air amount reduction is, From the DP air volume at the idle start point to the first critical DP air volume, (DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β1 is the first DP air decrease amount per predetermined time) To decrease, and from the first critical DP air volume to the second critical DP air volume, decreases in a jump form, and from the second critical DP air volume, (DP air amount n is the next DP air amount, DP air amount n-1 is the current DP air amount, β2 is the second DP air decrease amount per predetermined time) Decreasing to satisfy A method of driving an idle air amount control system of a vehicle, characterized in that.