RU2258813C1 - Internal combustion engine timing gear clearance compensator - Google Patents

Abstract

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: proposed compensator contains valve body, spring-loaded rod and compensating element arranged in body. Rod consists of two part: lower one with valve plate and upper one with compensating element including screw mated through thread with rod, and slider installed for reciprocation along axis of slider under action of spring. Screw and slider are in contact through fine tooth surfaces. Valve body is mounted in engine housing through sealing gasket and it is fixed by split nut which presses valve body to engine housing and is locked by retainer.

EFFECT: improved reliability and convenience in operation, possibility of adjustment.

Description

The invention relates to the field of internal combustion engines, namely valve timing of the engine, can be used in mechanical engineering and the automotive industry.

Known valve timing of the internal combustion engine, comprising a valve body with inlet and outlet windows and placed therein coaxially with the external exhaust and internal intake valves with actuator, springs; in order to reduce the dimensions, the inlet and outlet windows are located on the same level on opposite sides of the valve body, the inlet valve is equipped with a dividing wall of the intake and exhaust zones, the valve body is plug-in, and the movable spring support of the exhaust valve and the stationary spring support of the intake valve are made in the form of telescopic cups and bushings placed one in the other with axial movement, the movable support of the intake valve is placed with the possibility of axial movement inside the movable support ypusknogo valve and is provided with a damping device (see. № Inventor's Certificate 1574846, F 01 L 1/28, Bul. № 24, 1990 YG).

Signs that match - contains a body with inlet and outlet windows and coaxially located exhaust and internal intake valves with a drive, springs and spring support, and the valve body is plug-in.

The reasons that impede the task are the difficulty in opening the valve of the suction and exhaust valves due to the elongated chain of action on the valve. This impairs the operation of the dynamics of the reciprocating movements of the actuator when the valve is exposed, and there is an additional load on the valve spring when the movable parts of opening and closing the valve return to their original position, as well as the difficulty of adjustment and inconvenience during operation.

Known valve timing of the internal combustion engine, comprising a cylinder head with inlet and outlet channels, a cylindrical sleeve and a valve seat, coaxially located external exhaust and internal intake valves with actuators, springs, movable and fixed spring supports and a valve stem seal, while in the outer casing of the exhaust valve, a dividing wall is made, and on its plate there is an inlet window and a landing girdle in order to improve aerodynamic quality by and the profile of the dividing wall of the exhaust valve and simplifying the design, the inlet window in the plate of the exhaust valve is located below its valve belt in height, and the valve seat is made in one piece with a cylindrical sleeve and is provided with windows coinciding along the contour with the inlet and outlet channels, movable bearings of the inlet and spring springs exhaust valves are equipped with cylindrical belts, arranged one in the other with the possibility of axial movement, and a fixed support for the springs is fixed to the thread in the cylinder head and equipped with elements for adjusting and fixing supports, with the upper part of the shaft of the exhaust valve is provided with a thread and equally spaced grooves, and the upper bearing box of the intake valve are made for the passage of parts of the exhaust valve stem (see. copyright certificate No. 1760137, 5 F 01 L 1/28, bull. No. 33, 1992).

Signs matching - contains coaxially located external exhaust and internal intake valves with actuators, springs, movable spring supports with axial movement, the spring support is fixed in the cylinder head and equipped with adjustment and fixing elements.

The reasons that impede the task are the complexity of the design, not convenient enough to operate, the complexity of the adjustment, which reduces reliability.

Known gap compensator for the gas distribution mechanism of an internal combustion engine, comprising a housing with a supporting element and holes and a spring-loaded rod and a compensating element located in the housing, the rod being placed on the compensating element, while in order to increase efficiency, the compensating element is made in the form of a contact cylinder in contact with a stock, and spring-loaded flat wedges placed in the holes of the housing and in contact with the latter (see copyright certificate No. 1772362, F 01 L 1/20, bull. No. 40, 1992).

Signs that match - contains a housing with a support element and holes, a spring-loaded stem and a compensating element located in the housing, the rod being placed on the compensating element.

The reasons that impede the task are design complexity, adjustment difficulty, inconvenience during operation, insufficient reliability due to the use of wedges. This affects the dynamics of the mechanism.

For the prototype adopted US patent No. 1457957, N.cl. 123-90.52, publ. 1923, on 3 pages, a well-known gap compensator for the engine gas distribution mechanism, comprising a body (valves) and a spring-loaded stem and a compensating element located in the housing, the stem consisting of two parts: the lower with the valve disc and the upper - a compensating element including a screw coupled a thread with a rod, and a slider having the possibility of reciprocating movement along the axis of the latter under the influence of a spring, while the screw and slider are in contact with surfaces having a fine tooth.

Signs that match - comprising a valve body and a spring-loaded stem and a compensating element located in the body, the stem consisting of two parts: the lower one with the valve plate and the upper one - a compensating element including a screw mated with a stem and a slider that can reciprocate movement along the axis of the latter under the influence of a spring, while the screw and the slider are in contact with surfaces having a small tooth.

The reasons that impede the task are not convenient enough for installation and inconvenience during operation. Which affects the performance of the mechanism.

The objective of the proposed invention is to increase reliability, adjustment capabilities and improve ease of use.

The technical result consists in the fact that the gap compensator for the gas distribution mechanism of the internal combustion engine, comprising a valve body, a spring-loaded stem and a compensating element located in the body, the rod consists of two parts: the lower one with the valve disc and the upper one - a compensating element including a screw, conjugated by a thread to the rod, and a slider having the possibility of reciprocating movement along the axis of the latter under the action of a spring, while the screw and slider are in contact with surfaces having small teeth, and the valve body is mounted in the engine housing through the gasket and fixed with a split nut, which presses the valve body against the engine housing and is locked by a stopper. This enhances adjustment capabilities and improves performance.

The proposed gap compensator for the timing of the internal combustion engine is illustrated in the drawing.

The clearance compensator for the gas distribution mechanism of the internal combustion engine comprises a valve body 1, a spring-loaded rod 2 and a compensating element 3 located in the housing 1, the rod 2 consisting of two parts: the lower one with a valve plate 6 and the upper one with a compensating element 3 including a screw 7, conjugated by a thread with the rod 2 and the slider 8, having the possibility of reciprocating movement along the axis of the latter under the influence of the spring 9, while the screw 7 and the slider 8 are in contact with surfaces having a fine tooth, and the valve body 1 mounted through a gasket 10 and a split nut 4 is fixed motor housing 11, which presses the valve body 1 to the motor housing 11 and the stopper 5 is locked.

The work of the gap compensator for the gas distribution mechanism of the internal combustion engine.

The valve body 1 is mounted in the housing of the internal combustion engine 11 through a gasket 10 and fixed with a split nut 4, which presses the housing 1 against the engine housing and is locked by a stop 5. The working gap between the upper plane of the screw 7 and the gas distribution mechanism (cam) is adjusted by retracting the downwardly moving reciprocating along the spline of the rod 2 of the slider 8 and the rotation of the screw 7, connected by a threaded connection to the rod 2. During subsequent coupling under the influence of the spring 9 of the slider 8 with screw 7 by means of a small tooth, the screw 7 is reliably fixed in the required position.

The split nut 4 constantly presses the housing against the housing of the engine 11 through the gasket 10, creating a tight connection. Stop 5 countersunk nut 4 by creating pressure on its middle part.

The valve cycle is associated with starting the engine. For example, when the engine is started, the cam shaft is rotated, which acts on the top of the screw 7, while the valve plate 6 opens a channel through which air enters the combustion chamber of the engine in accordance with its operation cycle, then when the cam shaft is rotated, the cam stops creating pressure on the screw 7 and the compressed spring 9 is expanded until the valve plate 6 closes with the seat of the housing 1, closing the air supply channel. With further compression, combustion of the working mixture takes place, and after expansion inside the cylinder of the working mixture, an ejection through the second valve of the same design that works on the engine cycle to remove exhaust gases occurs.

The design of the assembly of this design allows simple and reliable dismantling during operation and replacement with a new one.

The mechanism can be easily and constructively protected by a casing from environmental influences.

Claims (1)

The clearance compensator for the gas distribution mechanism of the internal combustion engine, comprising a valve body, a spring-loaded stem and a compensating element located in the body, the rod consisting of two parts: the lower one with the valve plate and the upper one, the compensating element including a screw mated with the rod and a slider having the possibility of reciprocating movement along the axis of the latter under the influence of the spring, while the screw and the slider are in contact with surfaces having a small tooth, characterized in that a valve mounted in the motor housing via a gasket and fixed with a split nut, which presses the valve body to the body of the motor is stopped and the stopper.