KR930010260B1 - Anti-deposits apparatus in valves - Google Patents

Abstract

The device for preventing deposits from being piled on the surface of an inlet valve comprises an inlet valve (4) switching the opening and shutting of an intake port (3) which is in a position between an inlet pipe (1) and a combustion chamber and a anti-deposit device (5) arranged at the inner face of the intake port. When the valve is open, the anti-deposit device makes mixture flow in tubulent flow for making the mixed state of air and fuel uniform, and when closed, it removes the deposits piled on the surface of the inlet valve.

Description

Deposit prevention device of intake valve for automobile

1 is a side cross-sectional view of an intake pipe in a state where a deposit according to the present invention is installed.

2 is an enlarged side cross-sectional view of the main part of FIG.

3 is a view in which the deposit preventing member according to the present invention is horizontally cut in a state provided in the intake port.

4 is a view showing various embodiments of the deposit preventing member according to the present invention.

FIG. 5 is a view showing when the intake valve is opened with the deposit preventing member according to FIG. 4B installed in the intake port. FIG.

* Explanation of symbols for main parts of the drawings

1: Intake pipe 3: Intake port

4: intake valve 5: deposit prevention member

6: valve seat

The present invention relates to a device for preventing deposits of intake valves for automobiles, and more particularly, to prevent deposits from accumulating on the surface of an intake valve to improve initial startability and improve runability. It is about.

Recently, the engine is transformed into an electronic control system, which has the advantage of being responsive and coping with driving conditions appropriately compared to a carburettor type vehicle.

The fuel control method for controlling the amount of fuel mixed with the intake air while entering the combustion chamber is adjusted to be a lean mixer in comparison with a carburettor type engine to reduce harmful substances in exhaust gas when warming up.

Therefore, it is possible to greatly reduce the harmful substances in the exhaust gas, which does not cause air pollution problem. However, this type of engine uses a lean mixer, so when deposits accumulate in the intake valve, part of the fuel flowing into the combustion chamber is absorbed by the deposits. It's too lean.

In this case, the initial startability is significantly worse in winter, and the engine loses its power due to the loss of output.

The fuel injection type vehicle can be recognized as a highly reliable vehicle only if it is determined to prevent the accumulation of deposits on the intake valve as much as possible.

Sediment accumulated in the intake valve is found to be oxidized on the surface of the valve by the intake valve pressure through the intake valve guide by the intake negative pressure.In addition to the deposition oil, carbon components, such as soot and fuel in the combustion chamber, It is known that this adheres.

Since such deposits cannot be prevented by the current engine structure, a plan for preventing these materials from being deposited is under study.

The present invention has been proposed as one of the ways to solve this problem, the first object of the present invention is to improve the initial startability and output by preventing the accumulation of deposits on the intake valve surface.

The second object of the present invention is to increase the output by increasing the explosion pressure by changing the flow of the mixer through the intake port into turbulent flow to make the mixture of fuel and air uniform.

In order to achieve the above object, the present invention provides an intake valve for opening and closing an intake port located between an intake pipe and a combustion chamber, and an intake port inner surface to be in contact with the valve surface when the intake valve is closed. Provided is a deposit preventing device for an intake valve for an automobile that removes deposits accumulated in contact with the valve surface when the flow of the mixer is in turbulent flow inside the intake port when the valve is opened by the deposit preventing member installed.

The deposit preventing member provides a deposit preventing device for an intake valve for a vehicle, characterized in that the pair of members are arranged opposite to each other by being bent around the valve stem.

The deposit preventing member is a single member, and is bent around the valve stem to provide a deposit preventing device for an intake valve for an automobile, characterized in that the front end is fixed to the valve seat opposite to each other.

The deposit preventing member is composed of four members and provides a deposition preventing device for an intake valve for an automobile, characterized in that it is bent around the valve stem while being equally distributed along the circumference of the valve seat.

The deposit preventing member provides a deposition preventing device for an intake valve for an automobile, characterized in that a plurality of the valve stems cross each other.

In addition to the above-described embodiment, all modifications in which the present invention can be modified within the technical idea may not depart from the scope of the present invention.

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

FIG. 1 is a view showing an example in which the deposit preventing device according to the present invention is installed in the intake pipe 1. The intake pipe 1 is injected with a fuel amount added or subtracted according to engine conditions by an electronic control device (not shown). The fuel injector 2 is provided toward the intake port 3 side.

The intake port 3 is provided with an intake valve 4 for reciprocating linear movement by valve opening and closing means (not shown) which receives power from the crankshaft and rotates. In addition, a deposit preventing member 5 is provided in the intake port 3 so as to be held in contact with the surface of the intake valve 4 described above.

FIG. 2 is an enlarged view of the intake port 3 of FIG. 1, showing an example in which the deposit preventing member 5 provided by the present invention is substantially installed.

According to this embodiment, the deposit preventing member 5 is fixed to the valve seat 6 arranged along the inner circumferential surface of the intake port 3, which shows that only one end of the member is fixed. .

3 is a plan view showing a state in which the deposit preventing member 5 is fixed to the valve seat 6 in a plan view, and the deposit preventing member 5 surrounds the stem 4S of the intake valve 4. It is shown that both ends are fixed to opposite sides.

Positioning the deposit preventing member 5 to the valve stem 4S which is the center of the intake valve 4 becomes an important requirement for removing the deposit accumulated therein, and the reason for this will be described later.

4 shows that at least one sediment preventing member 5 provided in the present invention is installed in various forms, at least one of which is fixed to the valve seat 6. It is shown that it is in contact with the intake valve (4).

4a shows that the two sediment preventing members 5 are bent inwardly to face each other, and b) the one sediment preventing member 5 is bent while passing around the valve stem so that both ends are opposite to each other. It is fixed.

4C shows that the deposit preventing member 5 is bent in an almost orthogonal state near the valve stem 4S while being equally distributed along the circumference of the valve seat. It is shown that 5) is arranged in a wrapping state while crossing around the valve stem 4S.

The deposit preventing member 5 preferably has a shape corresponding to the surface of the valve while being made of metal having a strip shape or arc shape having a suitable thickness.

FIG. 5 shows a state in which the member according to the embodiment of FIG. 4 b) is opened in a state of being installed in the intake port in order to understand the effect of the present invention well.

That is, the air flowing through the intake pipe 1 is mixed with the fuel injected from the fuel injector 2 and passes through the intake port 3 while the intake valve 4 is opened. When the deposit preventing member 5 is intact and only the intake valve 4 is lowered and the intake valve 4 is closed, the deposit preventing member 5 installed in the intake port 3 is in a state indicated by a virtual line of FIG. And its surface come into contact.

However, since the intake valve 4 is generally rotated by a predetermined angle while opening and closing, the surface of the deposit preventing member 5 and the intake valve 4 are in contact with each other while the opening and closing action of the valve is continuously performed. The part to be moved in the circumferential direction.

This action is because the deposit preventing member 5 is disposed close to and close to the valve stem 4S, so that when the intake valve 4 is rotated once, the surface of the valve is entirely formed by the deposit preventing member 5. It is like being scratched.

Therefore, even if deposits accumulate on the surface of the intake valve 4, it is immediately removed so that some of the oil flowing down the valve stem 4S, the soot of the combustion chamber and the components of the burned fuel do not accumulate.

The deposit preventing member 5 realizes another object of the present invention, in which the mixer passing through the intake port 3 in the state in which the intake valve 4 is opened as shown in FIG. When it hits (5), it changes to turbulent flow, and the mixed state of fuel becomes uniform.

As described above, the deposit prevention apparatus according to the present invention removes deposits accumulated on the intake valve surface to improve cold startability of cold weather, as well as to improve running performance, and to achieve uniform mixing of fuel by turbulence of the mixer. There is an effect that can be improved.

Claims (5)

Intake valve (4) for opening and closing the intake port (3) located between the intake pipe (1) and the combustion chamber, and in the intake port (3) so that the intake valve (4) is in contact with the valve surface when closed When the valve is opened by the sediment preventing member 5 installed on the side, the flow of the mixer is made turbulent inside the intake port 3 when the valve is opened, and when the valve is closed, it contacts the valve surface to remove deposits accumulated there. Deposition prevention device. 2. The intake valve and deposit prevention apparatus for a vehicle according to claim 1, wherein the deposit preventing member (5) is disposed so as to face the pair of members oppositely around the valve stem (4S). The deposition prevention member (5) according to claim 1, wherein the deposit preventing member (5) is bent around the valve stem (4S) as a single member, and its front end is fixed to the valve seat (6) opposite to each other. Device. 2. The intake valve and the deposition preventing device for automobile according to claim 1, wherein the deposit preventing member (5) is formed of four members and is bent around the valve stem while being evenly distributed along the circumference of the valve seat. The apparatus for preventing deposition of an intake valve for an automobile according to claim 1, wherein the deposit preventing member (5) crosses each other in a state of surrounding the valve stem (4S).