KR100190885B1 - A carbon removal unit of a throttle valve - Google Patents

Abstract

The present invention relates to an apparatus for automatically managing a throttle valve of a gasoline engine, comprising: an injection nozzle (4) installed in a throttle body (3) so as to evenly inject a carbon remover (2) into the throttle valve (1), and A storage tank 5 storing the carbon remover 2 to be provided to the injection nozzle 4 and an injection motor 6 for pressurizing and spraying the carbon remover 2 of the storage tank 5 to the injection nozzle 4. And the signal of the TPS 7 and the idle switch 8, the vehicle speed sensor 9 and the engine speed sensor 10 to determine that the vehicle is in the idle state and to change the output value of the TPS 7 relative to the reference state. By providing the carbon removal device of the throttle valve composed of the ECU (11) for driving the injection motor 6 in accordance with the above, to determine the degree of carbon deposited on the throttle valve (1) in accordance with the output value of the TPS (7) The carbon remover (2) can be sprayed at the appropriate time to automatically wash out the deposited carbon. Since it is possible to control the throttle valve (1) accurately at all times, there is an effect to ensure a stable operating state of the engine.

Description

CARBON REMOVAL DEVICE OF THROTTLE VALVES

The present invention relates to a throttle valve of an engine intake apparatus, and more particularly, to an apparatus for removing impurities deposited on a throttle valve.

A throttle body is installed in the intake of the gasoline engine so that the output of the engine is controlled by adjusting the amount of inhaled air so that the throttle valve is always in an accurate opening state so that the engine can be normally controlled.

However, the engine generates a blow-by gas during operation, and a large amount of carbon is deposited on the back side of the throttle valve (back side of the air intake direction) due to the engine backfire and the like, and thus, ISC (IDEL SPEED CONTROL) A phenomenon such as a bad engine idle speed and engine stoppage occurs due to blockage of related ports and incorrect determination of output value of TPS (TROTTLE POSITION SENSOR).

Therefore, in order to solve the above problems, it is necessary to remove a large amount of carbon deposited on the back of the throttle valve, and in the related art, a method of disassembling and wiping by hand using a cloth or the like is not used. to be.

Accordingly, the present invention has been made to solve the above problems, to provide a carbon removal device of the throttle valve to automatically remove the carbon when the carbon deposited on the throttle valve is a certain level or more. There is this.

1 is a schematic configuration diagram of a carbon removing device of a throttle valve according to the present invention;

2 is a configuration diagram of a carbon remover injector of the carbon remover of FIG. 1;

Figure 3 is a flow chart showing the operating sequence of the carbon removal device of the throttle valve according to the present invention.

Explanation of symbols for the main parts of the drawings

1: Throttle Valve 2: Carbon Remover

3: Throttle Body 4: Injection Nozzle

5: storage tank 6: injection motor

7: TPS8: Idle Switch

9: vehicle speed sensor 10: engine speed sensor

11: ECU

The carbon removal device of the throttle valve according to the present invention for achieving the above object is to store the injection nozzle installed in the throttle body so as to evenly spray the carbon remover to the throttle valve, and the carbon remover to be provided to the injection nozzle A storage tank, an injection motor for pressurizing and injecting a carbon remover of the storage tank with an injection nozzle, a signal of a TPS, an idle switch, a vehicle speed sensor, and an engine speed sensor to identify that the vehicle is idle, The ECU is configured to drive the injection motor according to a change amount of the TPS output value.

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

1 and 2 show the carbon removal device of the throttle valve according to the present invention, the injection nozzle (4) installed in the throttle body (3) to evenly spray the carbon remover (2) to the throttle valve (1) And a storage tank 5 storing the carbon remover 2 to be provided to the injection nozzle 4 and an injection motor for pressurizing and spraying the carbon remover 2 of the storage tank 5 to the injection nozzle 4. (6) and the TPS (7), the idle switch (8), the vehicle speed sensor (9) and the engine speed sensor (10) by receiving a signal to determine that the vehicle is in the idle state and the TPS (7) for the reference state It is comprised by the ECU 11 which drives the said injection motor 6 according to the change amount of an output value.

Here, the throttle body 3 is provided with a purge port 12 for purging the boil-off gas from the canister and into the combustion chamber, and an EGR port 13 for recirculating a part of the exhaust gas to reduce NO _x . ) Is formed, and even when the purge port 12 and the EGR port 13 as described above are blocked by carbon, the action of the carbon remover 2 as described above can be exerted.

That is, there may be a method for adjusting the angle of the injection nozzle 4 so that the carbon remover can be supplied to the purge port 12 or the EGR port 13, the EGR port 13 or the purge port ( There is also a method that can separately install the sensor to determine the degree of clogging 12 to spray the carbon remover (2) according to the input signal of the sensor.

Referring to the operation of the present invention configured as described above are as follows.

3 is a flowchart illustrating a process of operating the carbon removing device of the throttle valve according to the present invention in the light of the control logic of the ECU 11. The ECU 11 is a reference value of the TPS 7 in a state where the set initial condition is satisfied. When the current TPS (7) value for the value exceeds the set value, the injection motor 6 is driven to inject the carbon remover (2).

Here, the initial condition is a state in which the vehicle speed is '0', the idle switch 8 is in an ON state, and the engine is operating, and the vehicle speed sensor 9 determines that the vehicle speed is '0', The operation state of the idle switch 8 is determined by the signal of the switch 8, and the engine speed sensor 10 determines the state in which the engine is continuously operated to determine the initial state.

In addition, the reference value of the TPS (7) is determined and input in advance to the value measured when the throttle valve (1) is closed in a clean state, the set value of the TPS (7) to maintain the initial state as described above This is the tolerance of the required TPS (7) output.

Therefore, when the current TPS 7 output value is compared with the reference value and the error is larger than the set value, it is determined that carbon is deposited in the throttle valve 1 by a predetermined amount or more, and the injection motor 6 is driven to drive the carbon. When the remover (2) is injected from the injection nozzle (4), the injected carbon remover (2) removes the carbon deposited on the throttle valve (1) to obtain a normal output value of the TPS (7) to control the engine. It can be done normally.

As described above, the present invention is installed on the throttle body (3) to grasp the degree of carbon deposited on the throttle valve (1) in accordance with the output value of the TPS (7) and automatically spray the carbon remover (2) at the appropriate time Since it is possible to wash out the deposited carbon, it is possible to control the throttle valve (1) accurately at all times, thereby ensuring the stable operating state of the engine.

Claims (1)

An injection nozzle installed in the throttle body so as to evenly inject the carbon remover into the throttle valve, a storage tank storing the carbon remover to be provided to the injection nozzle, an injection motor for pumping and spraying the carbon remover of the storage tank into the injection nozzle; Throttle characterized in that the ECU receives the signals of the TPS and the idle switch, the vehicle speed sensor and the engine speed sensor to determine that the vehicle is in the idle state and drives the injection motor according to the change amount of the TPS output value for the reference state Carbon removal device for the valve.