KR100399183B1 - the lean peak control method and system according to fast accelerating while the vehicle travels under the warm-up condition - Google Patents

Abstract

The present invention relates to a method and a system for controlling a rapid lean mixer according to a rapid acceleration in a turbulent driving state of a vehicle. In the related art, a rapid increase in intake air volume and an actual amount of air intake at a rapid acceleration initial stage when a driver rapidly operates an accelerator pedal during a turbulent driving are known. There was a problem that a shock occurred in the engine because a section in which the sparse mixer was instantaneously generated due to a slight time difference between the time points of the increase control was generated.

In the present invention, the control unit included in the electronically controlled fuel injection system controls the actuator operation of the electronically controlled throttle opening and closing system according to the difference of the minute time, thereby delaying the opening degree of the throttle valve by the minute time, and the position sensor 4 The operation of the accelerator pedal (6) is monitored by monitoring the rapid operation of the accelerator pedal (6) and the engine running condition of the engine from the coolant temperature sensor (2). Acceleration determination unit 12 determines the increase amount by the signal of the sensor 4, the drive delay unit 14 is set at this time until the increase by the acceleration determination unit 12 is determined of the position sensor 4 The operation signal is stored so that an increase signal is sent out and fuel is injected, and at the same time, the actuator 16 is operated to open the throttle valve 8.

Description

The lean peak control method and system according to fast accelerating while the vehicle travels under the warm-up condition}

The present invention relates to a method and a system for controlling rapid mixer thinning according to rapid acceleration in a turbulent driving state of a vehicle, and more particularly, when a rapid inflow of intake air is required by a user's accelerator pedal operation during a turbulent driving of a vehicle. The present invention relates to a method and a system for controlling rapid thinning of a mixer according to rapid acceleration in a turbulent driving state of a vehicle which prevents the mixer from being rapidly thinned by recognizing the opening degree of a throttle valve.

In general, the electronically controlled injection system is divided into an intake system, a fuel system, and a control system. Injection control by the control unit is largely divided into injection timing and injection quantity control in the fuel system.

In addition, most electronically controlled injection systems follow an intermittent injection method in which injection control is performed by measuring intake air, and the basic fuel amount is determined by a two-dimensional map according to the engine speed and the intake flow rate. .

For this purpose, an air flow meter is installed in the intake system, and an oxygen sensor is installed in the exhaust system so that injection according to the optimum air-fuel ratio is performed.

Therefore, in the injection amount control, the learning control for predicting the optimum injection amount through the air-fuel ratio feedback control by the oxygen sensor and various sensors according to the intake air amount caused by the opening of the throttle valve is performed at the time of normal driving. In this situation, air-fuel ratio feedback control is released.

The operation condition in which the feedback control is released is most of the increase correction to form a rich mixer, the start increase and the increase in the turbulence, and the increase in acceleration to obtain the output in consideration of the drop in the vaporization state during the initial start or warm driving. There is this.

To this end, a sensor is installed to determine each operating condition, and a coolant temperature sensor is installed in the engine to break the engine's turbulence, and a throttle position sensor is used to determine the opening amount of the throttle valve according to the operation of the accelerator pedal. It is installed in the throttle valve assembly, in addition to the intake air temperature sensor knock sensor.

When the fuel injection control according to the acceleration in the turbulent driving during the fuel injection quantity control is explained in more detail, the turbulent driving is judged according to the coolant temperature (about 80 degrees) and the increase correction is performed, and the accelerator pedal is operated during the turbulent driving. When the acceleration is accelerated by the throttle position sensor signal, the acceleration increase correction according to the acceleration is performed.

The acceleration determination unit, which is a map for controlling the increase, is set separately, and when the turbulence driving condition and the acceleration condition are satisfied, the increase determined by the acceleration determination unit is added and injected.

By the way, during a turbulent driving, especially when the driver accelerates and accelerates the accelerator pedal, a section in which a sparse mixer is instantaneously generated by the rapid increase in the intake air amount is generated.

That is, as described above, in the warm-up running, the fuel injection amount is controlled based on the amount measured by the air flow meter in the section in which the feedback control is released, and the injection amount is controlled according to the increase by the separate accelerator.

However, when the accelerator pedal is operated rapidly, that is, when the throttle valve responding simultaneously with the accelerator pedal is rapidly opened, the intake air into the cylinder is introduced rapidly at the same time as the throttle valve is opened.

At this time, the control unit detects the rapid acceleration from the acceleration determination unit linked to the throttle position sensor and injects the acceleration increase for this. The actual intake flow into the cylinder is accelerated by a minute before the increase injection control point of the control unit. There was an area where no extra powder was sprayed.

As a result, during the micro delay time during which the injection volume is increased by the acceleration increase, a lean peak, in which a sudden lean mixer is formed, is generated, and the engine is shocked as a result of unstable combustion caused by the formation of the lean mixer. Acceleration delay occurred when the ignition timing was delayed during warming to reduce shock.

Accordingly, the present invention provides a vehicle's warmth that prevents the mixer from rapidly leaning by recognizing the opening degree of the throttle valve until the control unit judges the increase in ejection when the user's operation of the accelerator pedal is required during the driving of the vehicle. It is an object of the present invention to provide a method and system for controlling a rapid lean mixer according to rapid acceleration in a driving state.

To this end, the present invention is to control the actuator operation of the electronically controlled throttle opening and closing system according to the difference of the minute time by the control unit included in the electronically controlled fuel injection system to delay the opening of the throttle valve by a minute time, from the Excel position sensor By monitoring the rapid operation of the accelerator pedal and monitoring the engine's turbulence running condition from the coolant temperature sensor, when the operation of the accelerator pedal occurs during turbulence, the control unit determines the increase from the acceleration judgment part by the signal of the accelerator position sensor. In this case, the set driving delay unit stores the operation signal of the accelerator position sensor until the increase amount is determined by the map, and the increase signal is sent by the accelerator determination unit to inject fuel and operate the actuator to open the throttle valve. .

Therefore, the conventional incremental injection is carried out by the injection of the throttle valve by the operation of the accelerator pedal in accordance with the signal of the throttle position sensor attached thereto, the determination and the execution of the incremental injection of the control unit, the present invention, the operation of the accelerator pedal After the detection, the control unit increases and performs the injection and increase the throttle valve at the same time, thereby preventing the rapid acceleration of the initial mixer from running rapidly during warming up.

1 is a schematic diagram of a mixer rapid lean control system according to the present invention,

2 is a flowchart of a mixer rapid lean control method according to the present invention.

-Explanation of symbols for the main parts of the drawings-

2-cooling water temperature sensor, 4-excel position sensor,

6-Excel pedal, 8-throttle valve,

10-control unit, 12-accelerator,

14-drive delay, 16-actuator,

Hereinafter, the present invention will be described with reference to the accompanying drawings.

Exemplary drawings Figure 1 is a conceptual diagram showing a rapid lean control method of the mixer according to the present invention, Figure 2 is a flow chart showing a rapid lean control method of the mixer according to the present invention, the present invention from the cooling water temperature sensor (2) When the operation of the excel pedal 6 is monitored from the excel position sensor 4 in the state of monitoring the engine running, and the operation of the excel pedal 6 occurs during the running of the engine, the accelerator pedal corresponding to the opening of the throttle valve ( The vehicle warm-up driving state which delays the opening of the throttle valve 8 by delaying the operation of the actuator 16 until the acceleration increase of fuel injection amount is judged and performed according to the operation of 6). This is a method of rapid lean control of a mixer according to rapid acceleration at.

The present invention is to recognize the opening time of the throttle valve to adjust the micro-time difference of the fuel increase injection according to the rapid intake of the intake, therefore, the present invention is included in the control system of the electronically controlled fuel injection system, Acceleration judging part 12 for acceleration increase is set and the acceleration judging part according to the operation state of the accelerator pedal 6 corresponding to the opening degree of the throttle valve 8 at the input terminal of the control unit 10 which performs the increase injection. The accelerator position sensor 4 and the cooling water temperature sensor 2 for determining the driving of the engine's warm air are determined so that the acceleration increase by the acceleration determining unit 12 is determined during the vehicle warming. On the other hand, the accelerator pedal operation state of the accelerator position sensor 4 is stored until the acceleration increase signal by the acceleration determiner 12 is transmitted to the control unit 10, and the acceleration increase signal At the same time, the drive delay unit 14 which sequentially transmits the operation signal of the stored Excel position sensor 4 is set, and the actuator which opens the throttle valve 8 by the signal of the drive delay unit 14. 16 is a mixer rapid lean control system according to rapid acceleration in a vehicle warm driving state connected to the output end of the control unit 10 by the output operation unit.

As described above, the present invention senses the opening degree of the throttle valve 8 until the control unit 10 determines the increased injection when the inflow of the air is required by the user's operation of the accelerator pedal 6 during the driving of the vehicle. It provides a rapid thinning control method and system for a vehicle mixer to prevent the mixer from rapidly lean.

That is, conventional incremental injection is carried out by the injection of the throttle valve by the operation of the accelerator pedal in accordance with the signal of the throttle position sensor attached thereto, the determination and execution of the increase in the injection of the control unit, the present invention is The operation is first detected and accordingly the increase and injection determination and performance of the control unit 10 is made and at the same time the throttle valve 8 is opened.

To this end, the present invention is included in an electronically controlled fuel injection system including an electronically controlled throttle opening and closing system to delay the opening of the throttle valve until the control unit determines the acceleration by the signal of the excel position sensor and performs the increase control.

Here, the electronically controlled throttle opening and closing system controls the opening degree of the throttle valve 8 by the operation of the actuator 16 by the control of the control unit 10.

That is, the present invention is to delay the opening of the throttle valve (8) until the injection of the increase in the moment of the actual intake of the intake during rapid acceleration, the accelerator pedal and the throttle valve is connected by a cable, the mechanical control is always made in one-to-one simultaneous response It is difficult to carry out the present invention with a throttle valve opening and closing system.

On the other hand, in the electronically controlled throttle opening and closing system, an accelerator position sensor 4, which is a kind of potentiometer, is placed in the accelerator pedal assembly, so that the control unit 10 acts as an output signal of the accelerator position sensor 4 by the operation of the accelerator pedal 6. (16) is controlled.

That is, the accelerator position sensor 4 and the actuator 16 simultaneously operate the accelerator pedal 6 and simultaneously operate the actuator 6 so that the throttle valve 8 is opened and closed, but the control unit 10 The output signal to the actuator 16 can be controlled by the setting of, thereby preventing the simultaneous response.

Therefore, in the present invention, the actuator 16 may be controlled to delay the one-to-one simultaneous response until the increase of the control unit 10 is controlled during acceleration during turbulent driving.

In this regard, the present invention is a system included in the electronically controlled fuel injection system on the basis of the electronically controlled throttle valve opening and closing system, the input portion is composed of a cooling water temperature sensor (2) and the Excel position sensor (4).

By the transmission signal of the cooling water temperature sensor 2 and the Excel position sensor 4, the control unit 10 determines the increase in acceleration by the operation of the accelerator pedal 6 during the turbulent driving from the acceleration determination unit 12. The acceleration determination unit 12 is a map in which the increase amount for acceleration is determined as described above.

The increase map is an increase signal map corresponding to a conventional throttle position sensor. In the present invention, the increase signal is transmitted in response to the signal of the excel position sensor 4 under the condition of turbulent driving.

That is, in the related art, when the acceleration occurs, the increase amount is determined by the acceleration determination unit linked to the signal of the throttle position sensor, but in the present invention, the acceleration determination unit 12 is interlocked by the signal of the Excel position sensor 4. This control is conditional on a turbulent driving condition.

In addition, the drive delay unit 14 delays the output signal to the actuator 16 until the increase signal by the acceleration determiner 12 is transmitted, thereby causing a signal generated by the signal of the accelerator position sensor 4 and the like. The opening degree of the throttle valve 8 is perceived by the minute time in the one-to-one simultaneous response.

As a result, even if the control unit 10 increases the fuel injection amount according to the existing increase correction control by the acceleration determination unit 12, there is no minute time difference between the rapid inlet time and the increased injection time of the actual intake, and the rapid leanness of the mixer is reduced. This micro time is not a time difference enough for the user to recognize the delay time.

As described above, according to the present invention, if rapid acceleration occurs while driving in warm air, the opening of the throttle valve is delayed until the control unit controls the fuel increase according to the rapid acceleration, thereby preventing rapid lean of the mixer due to rapid acceleration. have.

Claims (2)

When the operating condition of the accelerator pedal 6 is monitored from the accelerator position sensor 4 while the engine running by the cooling water temperature sensor 2 is monitored, when the operation of the accelerator pedal 6 occurs during the driving of the engine, the throttle valve The accelerator pedal 6 corresponding to the opening is judged to determine the acceleration increase of the fuel injection amount, and the operation of the actuator 16 is delayed until the acceleration increase is performed. Delay key is a rapid lean control method of the mixer according to the rapid acceleration in the vehicle driving conditions. Acceleration judging part 12 for acceleration increase is set and the acceleration judging part according to the operation state of the accelerator pedal 6 corresponding to the opening degree of the throttle valve 8 at the input terminal of the control unit 10 which performs the increase injection. The accelerator position sensor 4 and the cooling water temperature sensor 2 for determining the driving of the engine's warm air are determined so that the acceleration increase by the acceleration determining unit 12 is determined during the vehicle warming. On the other hand, the control unit 10 stores the accelerator pedal operation state of the accelerator position sensor 4 until the acceleration increase signal by the acceleration determining unit 12 is transmitted to the control unit 10 and simultaneously stores the stored accelerator pedal operation state. The drive delay unit 14 which sequentially transmits the operation signal of the accelerator position sensor 4 is set, and the actuator 16 which opens the throttle valve 8 by the signal of the drive delay unit 14 is set. Control unit with output operation part Mixer rapid lean control system according to rapid acceleration in the vehicle warm driving state connected to the output terminal of (10).