KR101020818B1 - Apparatus for control engine of vehicle and method thereof - Google Patents

Abstract

The present invention is an engine control apparatus of a vehicle, to limit the highest RPM of the engine to prevent excessive rise in the engine oil temperature, and to improve the cooling performance of the engine.

The present invention is a process of determining whether the engine speed is maintained for more than the first set time more than the set reference speed, if the engine speed is maintained over the first set time or more than the reference speed is entered into the engine speed limit mode to reference the engine speed And the process returns to normal control when the tip out of the accelerator pedal is detected.

Engine Speed, Speed Limit, Tip Out

Description

Engine control and method of vehicle {APPARATUS FOR CONTROL ENGINE OF VEHICLE AND METHOD THEREOF}

The present invention relates to an engine control apparatus of a vehicle, and more particularly, to an engine control apparatus and a method of limiting the highest RPM of an engine to prevent excessive rise in engine oil temperature and to improve the cooling performance of the engine. It is about.

Since the engine generates very high heat during the combustion of the mixer to generate power, various types of cooling systems are applied to the vehicle to prevent the engine from overheating too high.

When the engine is operated for a long time at a high speed RPM causes an early deterioration due to excessive increase in the engine oil temperature, and thus there is a serious problem that causes the engine breakage due to the sintering of the bearing.

Therefore, an engine oil cooler, an automatic transmission oil cooler, and the like have been applied to a vehicle operating in a cold region such as the Middle East or Iran.

However, when an engine oil cooler, an automatic transmission oil cooler, or the like is applied, a problem arises in that the manufacturing cost of the vehicle is increased to weaken the price competitiveness.

In addition, a problem arises that the fuel loss is worsened by increasing the power loss and the weight of the vehicle.

The present invention has been invented to solve the above problems, the object of which is to limit the highest RPM of the engine to prevent excessive rise in the engine oil temperature to improve the cooling performance of the engine, thereby providing engine protection .

An engine control apparatus for a vehicle according to a feature of the present invention for realizing the above object,

An engine speed detector detecting an engine speed;

An accelerator pedal detector detecting a displacement of the accelerator pedal;

When the engine speed continues for more than the first reference time over the set reference speed, the engine speed is controlled and maintained below the reference speed, and the second preset time elapses or the tip-out of the accelerator pedal is exceeded in the engine speed limit state. A controller for releasing the engine speed limit mode and returning to normal control when it is detected;

It is composed of one or more drive means, and includes an actuator for adjusting the fuel injection amount and intake air amount in accordance with the control signal of the control unit.

In addition, the engine control method of the vehicle according to the characteristics of the present invention,

Determining whether the engine speed is maintained for at least the first preset time above the set reference speed;

Maintaining the engine speed below the reference speed when entering the engine speed limit mode if the reference speed is maintained over the first preset time;

If the tip out is detected, the process includes canceling the engine speed limit mode and returning to normal control.

By the above-described configuration, the present invention can be expected to maintain the temperature of the engine oil stable to provide the durability of each part of the engine.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

Since the present invention can be implemented in various different forms, the present invention is not limited to the exemplary embodiments described herein, and parts not related to the description are omitted in the drawings in order to clearly describe the present invention.

1 is a view schematically showing an engine control apparatus of a vehicle according to an embodiment of the present invention.

The present invention includes an engine RPM detection unit 101, an accelerator pedal detection unit 103, a control unit 105 and an actuator 107.

The engine RPM detection unit 101 detects the engine speed from the phase change of the crankshaft and provides the information to the control unit 105.

The accelerator pedal detection unit 103 detects the displacement of the accelerator pedal operated by the driver in the tip in or tip out, and provides the information to the controller 105.

The controller 105 enters the engine RPM limit mode when the engine RPM lasts more than the set reference RPM (for example, 6,000 RPM) or more for the first set time (for example, 1 minute). For example, the limit should not exceed 6,000 RPM.

In addition, the controller 105 releases the engine RPM limit mode when a second set time (for example, 5 minutes) elapses or a tip out of the accelerator pedal is detected in the state of limiting the highest engine speed RPM. Return to normal control.

The actuator 107 is constituted by one or more driving means, and performs fuel injection and air amount adjustment in accordance with a control signal applied from the controller 105.

The actuator 107 limits the fuel injection amount and the amount of air sucked into the engine according to the control signal of the controller 105 in the engine RPM limit mode so that the engine RPM is maintained below the set limit RPM.

Referring to the operation of the present invention that includes the above-described function in detail as follows.

In the state where the engine is maintained on, the control unit 105 detects the current engine RPM from the engine RPM detection unit 101 (S101) and determines whether the engine is operating at a set reference RPM (for example, 6,000 RPM) or more ( S102).

When the engine RPM is less than or equal to the reference RPM in the determination of S102, if the operation is greater than or equal to the reference RPM, the elapsed time operated by the reference RPM or more is countered (S103) to determine whether the first set time (for example, 1 minute) has elapsed. (S104).

If the elapsed time is determined to have passed the first set time in the determination of S104, for example, when it is determined that the engine has elapsed for more than 1 minute at 6000 RPM or more (S105).

Therefore, the controller 105 controls the actuator 107 to limit the fuel injection amount and the air amount so that the engine RPM is maintained below the set reference RPM.

Then, the elapsed time after entering the engine RPM limit mode is counted and accumulated (S106), and the displacement of the accelerator pedal is detected (S107) to determine whether a tip out of turning off the accelerator pedal is detected (S108). ).

If the tip-out of the accelerator pedal is not detected in the determination of S108, it is determined whether the elapsed time of the engine RPM limit mode has elapsed for the second set time (for example, 5 minutes) (S109).

If the elapsed time of the engine RPM limit mode exceeds the set second elapsed time in the determination of S109, the engine RPM limit control is released, and the control returns to normal control (S110).

In addition, when the tip-out of the accelerator pedal is detected in the determination of S108, the engine RPM limit mode is released and the control returns to the normal control (S110).

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It is included in the scope of rights.

1 is a view schematically showing an engine control apparatus of a vehicle according to an embodiment of the present invention.

2 is a flowchart illustrating an engine control procedure in a vehicle according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

101: engine RPM detection unit 103: accelerator pedal detection unit

105: control unit 107: actuator

Claims (3)

An engine speed detector detecting an engine speed; An accelerator pedal detector detecting a displacement of the accelerator pedal; If the engine speed continues for more than the first reference time over the set reference speed, the engine speed is controlled and maintained below the reference speed, and the second preset time elapses or the tip-out of the accelerator pedal is limited. A controller for releasing the engine speed limit mode and returning to normal control when it is detected; An actuator comprising one or more driving means, the actuator adjusting the fuel injection amount and the intake air amount according to the control signal of the controller; Engine control apparatus of a vehicle comprising a. Determining whether the engine speed is maintained for at least the first preset time above the set reference speed; Maintaining the engine speed below the reference speed when entering the engine speed limit mode if the reference speed is maintained over the first preset time; Canceling the engine speed limit mode and returning to normal control when tip out of the accelerator pedal is detected; Engine control method of a vehicle comprising a. The method of claim 2, The engine control method of the vehicle to return to the normal control when the second elapsed time is set after entering the engine speed limit mode.

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