KR100580452B1 - Purge control solenoid valve for fuel vaporized gas control device in vehicle - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purge control valve for a fuel evaporation gas control device of a vehicle, and to remove impurities in gas to the front of a purge control valve mounted on a gas line connecting a canister and an intake manifold. The purpose of this is to provide a smooth purge gas discharge by removing the adhered foreign matter using the rotation.

In order to achieve the above object, the present invention provides a canister (2) for introducing fresh air through a purge gas and an air purifier evaporated from the fuel tank (1) during operation of the engine, and the air freshener in the canister (2). On the intake manifold supplied to the gas flow line connected between the canister (2) and the intake manifold is provided with a purge control valve (3) which is operated and opened by the duty control, the purge control valve (3) In front of the canister (2) is characterized in that the cleaning means (4) to measure the state of the vehicle and to prevent the accumulation of foreign matter periodically by filtering the carbon and foreign matter in the gas flow line connected between the intake manifold It is done.

Description

Purge control solenoid valve for fuel vaporized gas control device in vehicle}

1 is a block diagram of a general vehicle fuel evaporation gas control device

2 is a block diagram of a conventional purge control valve

3 is a block diagram of a purge control valve having cleaning means according to the present invention;

4 is a block diagram of a cleaning means according to the present invention

5 is an operating state of the cleaning means according to the invention

    <Description of Symbols for Main Parts of Drawings>

1: fuel tank 2: canister

3: Purge control valve 3 ': Connecting line

3a: filter 4: cleaning means

5: driving member 5a: motor

5b: Drive Gear 5c: Drive Gear

5d: rotary filter 6: controller

7: sensor member 7a: battery voltage sensor

7b: cooling water temperature sensor 7c: intake air temperature sensor

The present invention relates to a purge control valve for a fuel evaporation gas control device for a vehicle, and more particularly, to a fuel evaporation gas control device for a vehicle which can prevent a blockage of a path due to impurities contained in a gaseous phase flowing from a canister. It relates to a purge control valve.

Recently, regulations on harmful emissions of automobiles have been tightened, especially in developed countries such as the United States. Among them, in particular in North America, the New Regulation For Evaporation Gas on hydrocarbons that evaporate from fuels has entered into force. It is mandatory to employ a leak inspection system for the system, which regulates not only the regulation of the amount of fuel evaporated from the vehicle itself, but also the monitoring of leakage in the fuel evaporation control system to control it.

Generally, fuel tanks that collect fuel used in automobiles pollute the atmosphere when evaporative gas (HC) is generated in the fuel tank and released to the atmosphere due to various factors. An evaporation gas control device is provided, and the fuel evaporation gas control device is a canister having activated carbon together with air introduced through an air purifier, while fuel evaporated from the fuel tank 1 when the engine is operated as shown in FIG. 1. (2, Canister) flows in and accumulates, from which the boil-off gas flows into the purge control valve (3, PCSV) to the combustion chamber.

That is, when the coolant temperature of the engine is 65 ° C. or higher, the thermo valve is closed and the purge control valve 3 is opened. When the purge control valve 3 is opened as described above, the vaporized gas adsorbed on the activated carbon of the canister 2 is discharged. It is separated from the activated carbon by external air coming in from below and is sucked into the combustion chamber through the intake manifold to combust.

However, the purge control valve 3 is provided on a line for maintaining a flow path between the canister 2 and the intake manifold to block or allow gas flow while opening and closing in accordance with an appropriate duty control input signal. As shown in FIG. 2, the inlet is prevented from adsorbing carbon into the valve 3 when hydrocarbon (HC) gas including carbon dust generated in the canister 2 flows. Although the filter 3a is provided at the site, the use of such a filter 3a prevents carbon from being adsorbed inside the valve 3, but as time passes, carbon is adsorbed to the filter 3a and the valve 3 ) Is not working or there is a problem that does not work.

In addition, if the foreign matter is caught in the filter 3a of the valve 3 as described above, the operation of the valve 3 may not be performed smoothly, or the purge gas from the canister 2 may not be discharged smoothly through the valve 3, thereby driving idle. There is a problem that causes the engine relief and output relief phenomenon.

Accordingly, the present invention has been made in view of the above-mentioned matters, and filters the impurities in the gas to the front part of the purge control valve mounted on the gas line connecting the canister and the intake manifold to perform its own rotation if necessary. The purpose is to provide a smooth purge gas discharge by removing clingy foreign matter.

In order to achieve the above object, the present invention provides a canister for introducing fresh air through a purge gas and an air purifier evaporated from a fuel tank during operation of the engine, and an intake manifold and the canister from which the fresh air is supplied to the engine. And a purge control valve installed on the gas flow line connected between the gas and the intake manifold, which is operated by the duty control and is opened and closed to adsorb foreign substances such as carbon, and the front part of the filter installed in the purge control valve It is characterized in that the cleaning means for periodically measuring the state of the vehicle to prevent the accumulation of foreign matter by filtering the carbon and foreign matter in the gas flow line connected between the canister and the intake manifold.

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

Figure 3 shows a block diagram of a purge control valve equipped with a cleaning means according to the present invention, the present invention is introduced through the purge gas and the air purifier evaporated from the fuel tank (1) during the operation of the engine The canister 2 and the intake manifold from which the breather is supplied to the engine and the gas flow line connected between the canister 2 and the intake manifold are operated under duty control to open and close the carbon and the like. A purge control valve (3) having a filter (3a) for adsorbing foreign matters is provided, and a front portion of the filter (3a) installed in the purge control valve (3) is connected between the canister (2) and the intake manifold. Cleaning means (4) is provided for measuring the operating state of the engine while filtering carbon and foreign matter in the gas stream to prevent accumulation of foreign matter periodically.

Here, the cleaning means 4 is a controller 6 which is an ECU which processes and judges according to a built-in logic through a sensor member 7 that measures a state of a vehicle, and a control signal of the controller 6. It is driven by to separate the foreign matter and carbon dust accumulated while filtering to block the foreign matter in the purge gas flowing from the canister (2) and the carbon dust flowing in the valve (3) in the front portion of the purge control valve (3) It consists of a drive member (5).

In this case, as shown in FIG. 4, the driving member 5 is rotated by being engaged with the driving motor 5a driven by the control signal of the controller 6 and the driving gear 5b of the motor 5a. It consists of the rotary filter 5d rotated by the driven gear 5c by a predetermined angle.

In addition, the sensor member (7) flows into the battery voltage sensor (7a) for measuring the voltage of the battery to determine the normal operating state of the engine, the coolant temperature sensor (7b) for measuring the coolant temperature of the engine and the engine It is made of an intake air temperature sensor 7c for measuring the intake air temperature.

Here, the battery voltage sensor 7a detects whether the voltage of the battery exceeds 13V, while the cooling water temperature sensor 7b and the intake temperature sensor 7c both detect whether or not the predetermined threshold is exceeded. do.

On the other hand, the controller 6 judges the measured value measured by the sensor member 7 and if the condition is satisfied, the driving member 5 is driven when the engine is turned off to operate the rotary filter 5d by the set number of times. I will let you.

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

According to the present invention, after the gas evaporated from the fuel tank 1 during operation of the engine flows into the canister 2 equipped with activated carbon together with the air introduced through the air cleaner, the coolant temperature of the engine is 65 ° C. As a result, the evaporation gas is sucked into the combustion chamber together with the new air through the intake manifold through the purge control valve 3 which is opened instead of the thermo valve.

At this time, the gas passes through the rotary filter (5d) and the filter (3a) before being introduced into the purge control valve (3) to pass through the purge control valve (3) after the adsorption material such as foreign matter and carbon is caught. Of course.

In addition, when the controller 6 satisfies a predetermined condition through values measured from the sensors 7a, 7b, and 7c of the sensor member 7, the driving member 5 is driven, that is, the controller 6 If it is determined that the battery voltage exceeds 13V and both the coolant temperature and the intake temperature exceed the preset thresholds, it is determined whether the engine is on or off. The operation signal is output to the driving member 5.

Subsequently, the driven motor 5a of the drive member 5 is rotated by the control signal of the controller 6, and accordingly, the driven gear 5c meshed with the drive gear 5b rotated together with the motor 5a. ) Is rotated, and the rotary filter 5d fixed to one end of the driven gear 5c is rotated several times to repeatedly open and close the passage as shown in FIG.

Accordingly, the carbon adsorbed on the rotary filter 5d and the foreign matters are separated to prevent the clogging of the rotary filter 5d. At this time, the number of rotations of the rotary filter 5d is determined by the amount of foreign matter adsorbed on the rotary filter 5d. Of course, it is determined experimentally in consideration of physical characteristics.

As described above, according to the present invention, the carbon in the gas is provided between the canister for introducing the purge gas evaporated from the fuel tank and the intake manifold for supplying the fresh air to the engine to control the inflow of gas. And filter that absorbs and filters foreign substances and removes foreign substances accumulated periodically according to engine condition, and carbon is adsorbed to the filter provided in the front part of purge control valve to block gas flow. It is effective to keep the operation of purge control valve smoothly at all times.

In addition, the present invention does not block the gas flow by periodically removing the carbon and foreign matter accumulated in the filter provided in the front portion of the purge control valve to smoothly discharge the purge gas from the canister engine during the idle operation and output relief phenomenon Of course, there is an effect that can be prevented.

Claims (6)

A canister (2) for introducing fresh air through a purge gas and an air purifier evaporated from the fuel tank (1) during operation of the engine, and an intake manifold (2) in which a fresh air is supplied to the engine from the canister (2). And a purge control valve (3) provided with a filter (3a) for adsorbing foreign substances such as carbon while being opened and closed by a duty control on a gas flow line connected between the gas and an intake manifold. The front part of the filter 3a installed in the purge control valve 3 filters the carbon and foreign substances in the gas flow line connected between the canister 2 and the intake manifold, and measures the operating state of the engine periodically. In order to prevent accumulation, the controller 6 processes and judges according to the logic built in through the sensor member 7 for measuring the state of the vehicle, and the purge control valve 3 is driven by the control signal of the controller 6. Cleaning means comprising a driving member (5) separating the accumulated foreign matter and carbon dust while filtering to block the foreign matter in the purge gas flowing from the canister (2) and the inflow into the valve (3) of the front of the A purge control valve for a fuel evaporation gas control device for a vehicle, characterized in that the configuration includes (4). delete 2. The driving gear (5) according to claim 1, wherein the driving member (5) is driven by being driven by a driving motor (5a) driven by a control signal of the controller (6) and a driving gear (5b) of the motor (5a). A purge control valve for a fuel evaporation gas control apparatus for a vehicle, comprising a rotary filter (5d) rotated by a predetermined angle by 5c). The method of claim 1, wherein the sensor member (7) is a battery voltage sensor (7a) for measuring the voltage of the battery to determine the normal operating state of the engine, and a coolant temperature sensor (7b) for measuring the coolant temperature of the engine And an intake air temperature sensor (7c) for measuring the intake air temperature flowing into the engine. 5. The battery voltage sensor (7a) according to claim 4, wherein the battery voltage sensor (7a) detects whether the voltage of the battery exceeds 13V, while whether the cooling water temperature sensor (7b) and the intake air temperature sensor (7c) both exceed a predetermined threshold A purge control valve for a fuel evaporation gas control device of a vehicle, characterized by detecting whether or not. According to claim 1, wherein the controller (6) determines the measured value measured by the sensor member (7) and if the condition is satisfied, when the engine is turned off to drive the drive member (5) by the set number of rotation filter ( A purge control valve for a fuel evaporation gas control device of a vehicle, characterized by operating 5d).

Images