KR100373020B1 - A method for controlling air induction of engine and a system thereof - Google Patents

Abstract

To reduce the amount of air flowing into the engine by blocking the blow-by gas flowing into the surge tank during idling, and to reduce the idle idling speed of the engine, to improve vehicle fuel economy and to suppress the noise and vibration of the engine,

A valve is installed on the vent pipe connected from the cylinder head cover to the surge tank, a branch pipe is connected to the air duct from the vent pipe, a pump is installed on the branch pipe, and the valve and the pump are controlled. An engine intake control method and system for installing a control means are provided.

Description

Engine intake control method and system {A METHOD FOR CONTROLLING AIR INDUCTION OF ENGINE AND A SYSTEM THEREOF}

The present invention relates to a method and a system for controlling an engine intake, and more particularly, a valve is installed on a pipe passage connected from a cylinder head cover to a surge tank, and a branch pipe connected to an air duct is installed in the pipe passage. The present invention relates to an engine intake control method and system for installing a pump on the branch pipe and providing a control means for controlling the valve and the pump.

As is well known, an automobile engine is a device that generates power by supplying air and fuel in a cylinder and burning it. The supply of air controls the amount of air supplied by opening and closing the throttle valve, and the supply of fuel is made by injecting fuel by an injector controlled by an electronic control unit (hereinafter referred to as ECU).

However, when no load is required for the engine, the throttle valve is closed, and in this case, the idle state is supplied. In the idle state, only the minimum air necessary for driving the engine is supplied.

4 shows an intake control system according to the prior art.

As shown in FIG. 4, the air intake control system according to the related art includes an air duct 410 for receiving air, an engine connected to the air duct 410, and the air inflowed from the air duct 410. A throttle valve 420 for controlling the amount of air sucked into the throttle, a surge tank 425 connected to the throttle body 415 including the throttle valve, through which the air introduced from the throttle valve passes, and the surge An intake manifold 460 is connected between the tank 425 and the engine to transfer air supplied from the surge tank 425 to the engine.

The throttle body 420 is provided with a throttle position sensor 455 (hereinafter referred to as TPS) for measuring the opening degree of the throttle valve 415.

A cylinder head cover 430 (also referred to as a rocker cover) is mounted to the cylinder head of the engine, and a PCV valve 435 (Positive Crackcase Ventilation Valve) is attached to the cylinder head cover 430, and the PCV valve 435 and the surge The tank 425 is connected to the PCV hose 440.

An ISA 445 (Idling Speed Actuator) is connected between the air duct 410 and the surge tank 425 by a hose so as to branch from the air duct 410 to allow air to flow into the surge tank 425. do.

A breather hose 450 is connected between the cylinder head cover 430 and the air duct 410.

The air supply to the engine when the throttle valve is open is controlled primarily by the amount of air drawn in by the throttle valve 420 in the throttle body 415 by the air in the engine room through the air duct 410. The air passing through the throttle valve 420 is supplied to the engine through the intake manifold 460 via the surge tank 425.

However, when idling, that is, when the throttle valve is closed, the air supplied to the engine is (1) air introduced through the gap of the throttle valve, (2) air controlled by the ISA 445 and introduced into the surge tank, And (3) air flowing into the surge tank through the PCV hose 440 connected to the PCV valve.

By the way, although the flow rate of the air supplied to the engine during idling is adjusted by the ISA 445, it is technically limited to reduce the minimum flow rate of the ISA 445, and also the minimum flow rate of the ISA 445. Even if it is suppressed, there is a limit in reducing the engine speed in the idling state by suppressing the air flowing into the engine in the idling state by the air introduced by the PCV valve. Therefore, there is a problem that fuel consumption and engine noise are high due to high idling speed.

Accordingly, the present invention is to solve such a problem, an object of the present invention is to block the blow-by gas flowing into the surge tank during idling to reduce the idle idle speed of the engine to improve fuel economy and suppress noise and vibration It is to provide a method and system.

1 is a block diagram of an intake control system according to an embodiment of the present invention.

2 is a view showing the flow of the blow-by gas exiting the PCV valve in the throttle valve on state.

3 is a flowchart illustrating an embodiment of an intake control method according to the present invention.

4 shows an intake control system according to the prior art.

In order to achieve the above object, the engine intake control system according to the present invention,

An air duct through which the first sucked air flows, a throttle valve for controlling an amount of air introduced through the air duct and supplied to the engine, a throttle position sensor connected to the throttle valve to measure an opening degree of the throttle valve, and the throttle In the engine intake control system including a surge tank connected to the valve to form a predetermined space, and a cylinder head cover connected to the surge tank by a vent pipe,

A valve installed on the vent pipe; It is electrically connected to the throttle position sensor and receives an opening signal of the throttle valve, and sends a closing signal to the valve when the opening signal is throttle off, and an opening signal to the valve when the opening signal is throttle on. Control means electrically connected to the valve to send; It provides an engine intake control system comprising a.

In the engine intake control system, branch pipe line branched from the vent pipe passage connected to the air duct; A pump installed on the branch pipe; More,

The control means electrically transmits a drive signal to the pump when the opening degree signal received from the throttle valve is throttle off, and sends a driving end signal to the pump when the opening degree signal is throttle on. It is preferred that the configuration be added to be connected.

Engine intake control method according to the present invention to achieve the above object,

It is determined whether it is in an idling state, and when it is in an idling state, the valve is closed and the pump is driven.

In the case of not idling, the valve is opened and the driving of the pump is terminated.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an intake control system according to an embodiment of the present invention.

As shown in FIG. 1, an intake control system according to an exemplary embodiment of the present invention includes an air duct 110 that receives air, and an air duct 110 connected to the air duct 110 and inflowed from the air duct 100. A throttle valve 120 for controlling the amount of air sucked into the engine, a surge tank 125 connected to the throttle body 115 including the throttle valve, through which the air introduced from the throttle valve passes, and the surge tank ( And an intake manifold 160 which connects between the engine 125 and the engine 100 to transfer the air supplied from the surge tank 125 to the engine.

The throttle body 120 is provided with a throttle position sensor 155 (hereinafter referred to as a TPS) for measuring the opening degree of the throttle valve 115.

The cylinder head cover 130 is mounted on the cylinder head of the engine 100, and a PCV valve 135 (Positive Crackcase Ventilation Valve) is attached to the cylinder head cover 130, and the PCV valve 135 and the surge tank ( 125 is connected to the PCV hose 140.

An ISA 145 (Idling Speed Actuator) is connected between the air duct 110 and the surge tank 125 so as to branch from the air duct 110 and allow air to flow into the surge tank 125.

A breather hose 150 is connected between the cylinder head cover 130 and the air duct 110.

On the PCV hose 140, a valve 165 for opening and closing the blow-by gas flow through the PCV hose 140 is installed. The valve 165 may be used as any valve for opening and closing the blow-by gas flow, but is preferably used as a solenoid valve for opening and closing an electric signal.

The control means 170 is electrically connected to the TPS 155 to receive the opening signal of the throttle valve, and the control means 170 controls the opening and closing operation of the valve 165. Is electrically connected to 165.

The control means 170 may be used as any control controller for closing the valve 165 when the output of the TPS is throttle-off and opening the valve 165 when the output of the TPS is throttle-on. However, it is preferable to use an electronic control unit (ECU) for performing the above operation.

In addition, a branch pipe 175 branched from the PCV hose 140 and connected to the air duct is installed.

When the branch pipe 175 is connected to the air duct 110, when there is another vent pipe (for example, a breather hose 150) connected to the air duct 110, the branch pipe 175 may be connected to the vent pipe.

A pump 180 for forcibly discharging the blow-by gas accumulated in the PCV hose 140 to the air duct is installed on the branch pipe 175 when the valve 165 is closed.

The pump 180 is electrically connected to the control means 170 and is driven by receiving a driving signal from the control means. The driving is that the pump 180 is driven when the output of the TPS is throttle off, the drive is stopped when the output of the TPS is throttle on.

3 is a flowchart illustrating an embodiment of an intake control method according to the present invention.

In the intake control method according to an embodiment of the present invention, as shown in FIG. 3, first, the control unit 170 determines whether an engine is started (S305). The start-up determination may be determined whether there is an input of the measurement rotation speed from an arbitrary sensor installed in the engine and measuring the engine rotation speed.

If the start is not started in the start determination (S305), the process proceeds to the end step, and if the start is stopped, the control means determines whether the start state is the idling state (S310).

The idling determination may be determined based on a signal input from the TPS 155, and may be determined to be in an idling state when the throttle is off, and may be determined to be in the idling state when the throttle is on. .

If it is determined in the idling determination (S310) that the idling state, the control means closes the valve 165 (S320). The closing operation of the valve may be closed by a close signal received from the control means.

After closing the valve 165 (S320), the control means 170 drives the pump 180 (S330). The pump 180 may be supplied with power and driven by a driving signal output from the control means 170.

If it is determined in the idling determination (S310) that it is not in the idling state, the control means opens the valve 165 (S340). The opening operation of the valve may be open operation by an opening signal received from the control means.

After opening the valve 165 (S340), the control means 170 terminates the driving of the pump 180 (S350).

After the pump is driven in the pump driving step (S330) or the pump driving is terminated in the pump driving termination step (S350), the control unit 170 determines whether the engine start is finished (S360).

In the start-up determination (S360), when it is determined that the start is not finished, the process proceeds to the idling determination step (S310). Quit.

Hereinafter, an operation process of an intake control system according to an embodiment of the present invention according to the intake control method according to an embodiment of the present invention will be described.

2 is a view showing the flow of the blow-by gas exiting the PCV valve in the throttle valve on state.

Referring to FIG. 2, since the throttle valve is on, the control unit 170 sends an opening signal to the valve 165, and the valve 165 is opened by the opening signal.

In addition, since the control means 170 terminates the driving of the pump 180 because the throttle valve is on, the branch pipe 175 in which the pump 180 is installed is closed by the end of the driving of the pump 180. It becomes a state.

Therefore, the blow-by gas exiting the PCV valve 135 flows into the surge tank 125 through the valve 165 and is supplied to the engine, resulting in the same control result as the conventional intake control system.

The flow of blow-by gas exiting the PCV valve in the throttle valve off state is shown in FIG. 1.

Referring to FIG. 1, since the throttle valve is in the off state, the control means 170 sends a closing signal to the valve 165 and operates by the closing signal, thereby closing the valve 165.

In addition, since the control means 170 drives the pump 180 because the throttle valve is off, the branch pipe 175 in which the pump 180 is installed by the driving of the pump 180 is open. do.

Therefore, the blow-by gas exiting the PCV valve 135 does not flow into the surge tank 125 through the valve 165, but flows into the air duct 110 before the throttle valve 115.

However, even when the blow-by gas from the PCV valve 135 flows into the air duct 110, there is no change in the total amount of air flowing into the surge tank through the throttle valve gap while the throttle valve is closed. As a result, in the conventional intake system, it is possible to obtain a result of preventing the air from the PCV valve from being supplied to the surge tank during idling.

As mentioned above, although the preferred embodiment regarding the intake control method and system of this invention was described, this invention is not limited to the above-mentioned embodiment, From the embodiment of this invention to those of ordinary skill in the art to which this invention belongs. It includes all changes in the range which are easily changed and considered equivalent.

According to an embodiment of the present invention, by blocking the blow-by gas flowing into the surge tank during idling to reduce the amount of air flowing into the engine, reducing the idle idling speed of the engine, to improve the vehicle fuel economy, the engine noise and Vibration can be suppressed.

Claims (6)

(delete) (Correction) A throttle position sensor for adjusting the amount of air introduced through the air duct, the throttle valve for adjusting the amount of air introduced into the engine through the air duct, the throttle valve is connected to the throttle valve to measure the opening degree of the throttle valve In the engine intake control system including a surge tank connected to the throttle valve to form a predetermined space, and a cylinder head cover connected to the surge tank by a vent pipe; A valve installed on the vent pipe; A branch pipe branched from the vent pipe and connected to the air duct; A pump installed on the branch pipe; And Control means electrically connected to the pump and valve, The control means is electrically connected to the throttle position sensor and receives an opening signal of the throttle valve, and when the opening signal is throttle off, sends a closing signal to the valve and sends a driving signal to the pump. And when the opening signal is throttle-on, an opening signal is sent to the valve and a driving end signal is sent to the pump. (Correction) In Clause 2, The control means is an electronic control unit (ECU) for controlling the fuel injection amount based on the throttle opening degree input from the throttle position sensor, The valve is an engine intake control system, characterized in that the solenoid valve is operated by receiving an electrical signal from the control means. (delete) (Correction) A throttle position sensor for adjusting the amount of air introduced through the air duct, the throttle valve for adjusting the amount of air introduced into the engine through the air duct, the throttle valve is connected to the throttle valve to measure the opening degree of the throttle valve In the engine intake control system including a surge tank connected to the throttle valve to form a predetermined space, and a cylinder head cover connected to the surge tank by a vent pipe; (a) determining whether an idling state; (b) closing the valve if it is determined in the idling state in step (a); (c) driving the pump; (d) opening the valve if it is determined in step (a) that it is not in an idling state; And (e) an engine intake control method comprising terminating driving of the pump; (Correction) In Clause 5, In the step (a), the idling determination, When the throttle opening signal is received from the throttle position sensor and the throttle opening signal is throttle-off, it is determined to be in an idling state, and when the throttle opening signal is throttle-on, the engine intake control is characterized in that it is not in an idling state. Way.