JPH03163513A - Device for removing valve deposition - Google Patents

Abstract

PURPOSE:To rapidly and easily remove the valve depositions sticking to the mounting seat side of a valve head by slidably providing a removing member which is curved by the curving of the insertion part of an endoscope on the outer periphery of this insertion part. CONSTITUTION:The removing member 19 curved by the curving of the insertion part 14 of the endoscope having the flexibility to allow the insertion of the endoscope into the combustion chamber of an engine is slidably provided on the outer periphery of this insertion part 14. The insertion part 14 of the endoscope is inserted into the combustion chamber and is curved and directed to the position where the depositions are stuck. The depositions are removed by sliding the removing member 19. Thus, the depositions sticking to the mounting seat surface side of the valve head are rapidly and easily removed without disassembling the cylinder head.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for removing deposits that can be removed from the seating surface of a valve head.

[Prior Art] As is well known, a valve head is disposed on an intake and exhaust boat formed in the cylinder head of an engine, and when this valve head comes into contact with and separates from a seating surface provided on the intake and exhaust boat, The intake and exhaust passages are opened and closed.

By the way, if the specifications of the fuel and the engine do not completely match, incomplete combustion products may be generated when the fuel is combusted. When this incomplete combustion material flows through the intake and exhaust boats according to the flow of fluid in the combustion chamber, a portion of it adheres to the seating surface side of the valve head and becomes valve deposits. Even if only a small amount of kimono is generated during one combustion, it increases over time and may eventually become a hindrance to fluid flow.

Therefore, a technique has conventionally been implemented in which an insertion section of an endoscope is inserted into the combustion chamber for inspection.

[Problems to be Solved by the Invention] However, even if the above-mentioned valve deposits are found through inspection using this endoscope, it is necessary to disassemble the cylinder head to remove them, which takes time and , extremely complicated work is required.

[Objective of the Invention] The present invention has been made in view of these circumstances, and provides a method for easily removing deposits that may adhere to the serving surface side of a valve head in a short time without disassembling the cylinder head. The object of the present invention is to provide a device for removing valve deposits that is capable of removing valve deposits.

[Means for Solving the Problems] A device for removing valve deposits according to the present invention has a flexible endoscope that can be inserted into the combustion chamber of an engine. A removing member that is curved by curving is slidably provided.

[Operation] With this configuration, the endoscope insertion part can be inserted into the combustion chamber,
The insertion portion is bent to point toward the area where the deposit is attached, and the removal member is slid to remove the deposit.

[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 relate to the first embodiment of the present invention, in which FIG. 1 is an overall view of the removal device, FIG. 2 is a sectional view of the removal member, and FIG.
The figure is an enlarged view of part A in FIG. 1, and FIG. 4 is an explanatory diagram of the operating state of the removal device.

First, the general structure of the engine will be explained with reference to FIG. Reference numeral 1 denotes a cylinder block, on which a cylinder head 2 is fixed. A cylinder bore 1a is formed in the cylinder block 1 to accommodate a piston 3 in a freely retractable manner, and a combustion chamber 4 is formed between the piston 3 and the cylinder head 2.

An intake passage 5 and an exhaust passage 6 are formed in the cylinder head 2, and these intake passage 5 and exhaust passage 6 are
It communicates with the combustion chamber 4 via an intake boat 5a and an exhaust passage 6a. Further, an intake valve seat 7 and an exhaust valve seat 8 are provided in these intake and exhaust passages 5a and 6a.
(2) Seating surfaces 7a, 8a are formed on the combustion chamber 4 side of these valve seats 7, 8.

On the other hand, the cylinder head 2 is provided with a stem guide 9a that slidably supports the valve stem 9. One end of the valve stem 9 is an intake/exhaust valve seat 8.9.
It protrudes into the combustion chamber 4 through a curved surface 11a, and a valve head 11 is shaped into a curved surface 11a at the tip of this protrusion. A valve face 12 is provided on the outer periphery of the valve head 11, for example, at 456, and this valve face 12 is attached to the seating surface 7a.
, 8a at predetermined valve timing to open and close the intake and exhaust ports 5a and 6a.

Further, a plug hole 2a is provided in the substantially central shaft of the cylinder head 2 in a vertical direction from the top, and a hole 13 for threading a spark plug is formed at the bottom of the plug hole 2a. is in communication with the combustion chamber 4.

By the way, the valve deposit removal device according to this embodiment has an insertion portion 14 that can be inserted into the combustion chamber 4 through the plug screwing hole 13.

The insertion section 14 is made of an elongated and flexible member, and has an operation section 15 on its proximal end that can be grasped by hand.
4, there is provided a tapered portion 16 whose diameter gradually decreases toward the insertion portion 14 side. The insertion portion 14 side of this tapered portion 16 is formed to have approximately the same diameter as the insertion portion 14 , while the operation portion 15 side has a smaller diameter than the operation portion 15 . A stepped portion 15a is formed on the portion 16 side.

A distal end portion 14a provided at the distal end of the insertion portion 14 is provided with an observation through-hole and an illumination through-hole (not shown),
The work site is illuminated with illumination light emitted from the illumination through hole, and an image of the work site is viewed through the observation through hole at the eyepiece section 17 provided at the proximal end of the operating section 14. The working area can be observed through the eyepiece 17 by transmitting the information to the eyepiece 17.

Further, a curved portion 14b formed of, for example, a plurality of mutually bendable joint rings is provided adjacent to the base end side of the distal end portion 14a. This curved portion 14a is connected to a pair of curved operating knobs 18a provided on the operating portion 15. The curved portion 14b is configured to be curved at the curved portion 18b.
By curving the tip portion 14a, it is possible to direct the tip portion 14a toward the work site.

Further, a removal member 19 is attached to the insertion portion 14 .
The exterior is slidable along the This removal member 19
is formed by spirally bending an elastic flat bar-like member as shown in FIG. Its elasticity is set so that it is curved. Further, a predetermined gap is provided between one spiral of the removing member 19 and the adjacent spiral. Therefore, with this removal member 19 in contact with the deposits D that may adhere to the seating surface 7a side of the valve head 11, that is, the curved surface 11a of the valve head 11, one of the removal members is inserted into the insertion portion. By sliding the removal member 19 along the line 14, it is possible to remove the deposit D with the removal member 19.

Further, this removal member 19 is shaped to have approximately the same length as the entire length of the insertion portion 14, and its proximal end side is inserted and fixed to the grip member 21.

As shown in FIG. 3, the gripping member 21 has a substantially cylindrical shape, and its inner wall is formed into a tapered surface similar to the slope of the tapered portion 16.

Therefore, when the gripping member 21 is moved toward the operation section 15 side, the end of the gripping member 21 on the operation section 15 side comes into contact with the stepped portion 15a of the operation section 15, and the gripping member 21
The inner periphery and the outer periphery of the tapered portion 16 are brought into contact. In this state, the distal end of the removal member 19 is positioned slightly closer to the operating section 15 than the distal end surface of the distal end 14a.

Further, the outer diameter of the gripping member 21 is formed to have substantially the same shape as the outer diameter of the operating portion 15 on the operating portion 15 side, and gradually becomes smaller toward the tip portion 14a side.

On the other hand, the tapered portion 16 has a locking protrusion 16 that provides elasticity.
A is provided in a protruding manner, and a locking recess 21a is formed in the inner wall of the gripping member 21, in which the locking protrusion 21a is locked. When moved toward the operating section 15, the locking protrusion 1
6a and the locking recess 21a are engaged, so that the gripping member 21 is held by the tapered portion 16.

Next, the operation of the embodiment having the above-mentioned configuration will be explained.

When the engine is started, the valve face 12 and intake valve seats 7, 8 are seated 7a. 8a are brought into contact with and separated from each other at a predetermined valve timing, and intake air is drawn into the combustion chamber 4 through the intake port 5 and burned in the combustion chamber 4, while exhaust gas is exhausted through the exhaust boat 6a. It flows out into passage 6.

By the way, if the combustion mixed in the intake air supplied to the combustion chamber 4 does not completely match the specifications of the engine, incomplete combustion may occur during combustion. The generated incompletely combusted substances adhere to the seating surfaces 7a, 8a of the valve head 11, that is, the curved surface 11a of the valve head 11, when flowing through the intake/exhaust boats 5a, 5a according to the intake and exhaust flows. There is a possibility that this will result in deposits D.

If this deposit D accumulates, it may impede the flow of the air intake and exhaust air, resulting in a significant decrease in air intake and exhaust efficiency.

Therefore, before such a phenomenon occurs, the deposit D that may adhere to the curved member 11a is removed using the valve deposit removal device according to the present invention.

First, the engine is stopped, the spark plug screwed into the hole 13 of the cylinder head 2 is removed, and the crankshaft is rotated to project at least one of the valve heads 11 into the combustion chamber 4. Ru. Then, insert the insertion portion 14 into the combustion chamber 4 through the plug hole 2a and the hole 13.
Insert it inside.

In this case, the locking protrusion 16a of the tapered portion 16 and the gripping member 2
If the gripping member 21 is held in the tapered portion 16 by engaging with the locking recess 21a of the removal member 1, the distal end side of the removal member 1 does not wobble and can be easily inserted.

When the distal end portion 14a and the curved portion 14b of the insertion portion 14 are inserted into the combustion chamber 4, the illumination light is transmitted through the illumination hole of the distal end portion 14a and is transmitted to the naked eye through the eyepiece portion 17. While observing the curved portion 14b, the tip portion 1
4a is directed toward the curved surface 11a. Next, the gripping member 16 is gripped and the gripping member 16 is held at the tip end 14a.
When moved to the side, one removal member fixed to the gripping member 16 slides along the insertion portion 14, the portion located in the curved portion 14b is curved, and its tip portion is aligned with the tip portion 14a. It protrudes further toward the tip.

Then, when one side of the removal member 19 is brought into contact with the deposit D adhering to the curved surface 11a and the gripping member 16 is slid back and forth along the insertion portion 14, the deposit D can be removed with just one removal member. By rubbing D, the deposit D is removed. If necessary, move the removal member 19 to the operation section 15 side! By exposing the tip part 14a from the removal member 19, the working area can be observed, and the bay till part 14
By changing the bending angle b and the position in the rotating direction of the insertion portion 14, the deposits D adhering to other parts of the curved surface 11a are removed.

When the removal of the deposit D adhering to the curved surface 11a of one valve head 11 is completed, the tip 14 is directed toward the other valve head 11, and the tip 14 is directed toward the other valve head 11. is caused to protrude into the combustion chamber 4, and the deposits D that may adhere to the curved surface 11H of the valve head 11 are removed by performing the same operation as described above.

When the removal of the deposits D from all the valve heads 11 is completed, operate the bending operation knobs 18a, 18b to
b is returned to a straight line, the insertion portion 14 is extracted from the combustion chamber 4, and the spark plug is screwed into the hole 13 to complete the work.

In this embodiment, an example in which the removal member 19 is mounted on the insertion section 14 of a fiberscope has been described, but it is also possible to arrange the removal member 19 to be mounted on an electronic endoscope.

Further, in this embodiment, the removal member 19 is attached to the locking protrusion 16a.
Since the removal member 19 is configured to be locked via the locking recess 21a, there is no need to hold the removal member 19 when inserting the insertion portion 14 into the combustion chamber 4, which facilitates the insertion work. This has the effect that it is possible to

FIG. 5 is a sectional view of a removal member according to a second embodiment of the present invention.

In this embodiment, the removal part @ 19 is formed by spirally curving an elastic flat bar-like member, and the scraping part 1 protrudes outward at the mutually opposing parts of each spiral.
9a is provided.

The effect is that the removal effect of the deposit D is high and that the working time can be shortened.

FIG. 6 is a side view of a removal member according to a third embodiment of the present invention.

In this embodiment, the removal member 19 is formed into an elastic coil-shaped member, and has the advantage of being easy to shape.

FIG. 7 is a sectional view of a removal member according to a fourth embodiment of the present invention.

In this embodiment, the removal member 19 is formed of a coil-shaped member, and a flat portion 19b parallel to the axis of the removal portion forest 19 is provided on the outer periphery by cutting or the like. The scraping effect is high, and the sliding property between the removal member 19 and the endoscope insertion section 14 is good.

[Effects of the Invention] As explained above, according to the valve deposit removal device of the present invention, valve deposits that may adhere to the seating surface side of the valve head can be easily removed in a short time. be.

[Brief explanation of the drawing]

1 to 4 relate to the first embodiment of the present invention, in which FIG. 1 is an overall view of the removal device, FIG. 2 is a sectional view of the removal member, and FIG.
The figure is an enlarged view of part A in FIG. 1, FIG. 4 is an explanatory diagram of the operating state of the removal device, FIG. FIG. 7 is a side view of the removal member according to the third embodiment, and FIG. 7 is a sectional view of the removal member according to the fourth embodiment of the present invention. 4...Combustion chamber 14...Insertion part 19...Removal member D...Deposition

Claims (1)

[Claims] A valve characterized in that a removal member that is curved by the curvature of the insertion portion is slidably provided on the outer periphery of an insertion portion of a flexible endoscope that can be inserted into a combustion chamber of an engine. Deposit removal device.