RU2323352C1 - Gas timing phase control device - Google Patents

Abstract

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: used in drive are two planetary trains with equal gear ratio which provides angular shifting of camshaft relative to drive sheave of timing mechanism. Each train contains central shaft. Central shaft of one of trains is coupled with timing gear sheave, and other shaft is coupled with camshaft, its central wheel being coupled with rotary actuating mechanism.

EFFECT: simple and compact design of device.

2 cl, 2 dwg

Description

The invention relates to engine building, in particular to devices for controlling the valve timing in internal combustion engines.

Known planetary gear reducer (Pat. RU 23477), comprising a housing with thrust bearings, in which an output rotary link, a central input shaft, gear rollers installed in the recesses of the housing are installed and are in constant interaction with satellite gears mounted with rotation gears on the eccentrics of the input shaft, while the output rotary link contains fingers interacting with the cylindrical surfaces of the holes in the satellites.

A disadvantage of the known device is the inability to provide an angular shift of the input shaft elements when the gearbox is running, which is necessary when using it in the valve timing control mechanism.

A device for controlling the valve timing (Vane CAM mechanism, “Behind the wheel” magazine, 01/2004, p. 73) is made in the form of a hydraulic motor located on the camshaft, whose rotor is connected to the camshaft.

A disadvantage of the known device is the design complexity due to the type of drive - hydraulic.

The technical result that is provided by the invention is to simplify the design of the valve timing control device.

The specified technical result is achieved by the fact that the valve timing control device contains a drive pulley and a drive with a camshaft associated with the camshaft, the drive being made in the form of two planetary gears with the same gear ratio, each of which contains a central shaft kinematically connected to the central wheel through a satellite movably mounted in the common carrier, and the central shaft of one of the planetary gears is connected to the drive pulley of the gas distribution mechanism ia, and its central wheel is stationary, the central shaft of another planetary gear is connected with the camshaft of the gas distribution mechanism, and its central wheel is connected with a rotary actuator. In addition, planetary gears can be made as a pin drive.

Distinctive features of the invention in comparison with the prototype is that the drive is made in the form of two planetary gears with the same gear ratio, each of which contains a central shaft kinematically connected to the central wheel via a satellite movably mounted in the common carrier, the central shaft of one of the planetary gears connected to the driving pulley of the gas distribution mechanism, and its central wheel is stationary, the central shaft of another planetary gear is connected to the cam shaft of the gas distribution mechanism division, and its central wheel associated with a rotary actuator. In addition, planetary gears can be made as a pin drive.

Figure 1 shows the kinematic diagram of a device for controlling the valve timing,

figure 2 is a kinematic diagram of a device for controlling the valve timing, where the planetary gears are made with pinwheels.

The device for controlling the valve timing of an internal combustion engine contains a drive pulley 1, two planetary gears that contain central shafts 2 and 3 with central gears 4 and 5, kinematically interacting through satellites 7 and 8 rotating in common carrier 6 with central wheels 9 and 10. When this central wheel 9 is stationary, and the Central wheel 10 is connected to the electric drive 11. The Central shaft 2 is connected with the drive pulley 1, and the Central shaft 3 is connected with the cam shaft 12. The drive pulley 1 is driven by a pulley 13 d of the internal combustion engine by means of a gear belt 14. The gear ratio of planetary gears is the same.

In the execution of the valve timing control device (Fig. 2), in which the planetary gears are made with sprockets, the satellites 7 and 8 are mounted on the central shafts 2 and 3 with an eccentricity with the possibility of rotation, while the central gears 4 and 5 are excluded.

The valve timing control device operates as follows.

The rotation of the drive pulley 1 through the central shaft 2 and the satellite 7 is converted into the rotation of the carrier 6, in the interaction of which with the satellite 8 the central shaft 3, and with it the cam shaft 12, is rotated, provided that the gear ratio of the planetary gears is the same, and the central the wheel 10 is stationary, the rotation of the shafts 2 and 3 is synchronous, while a constant relative angular position is maintained between them. When the Central wheel 10 is turned from the electric drive 11, the relative angular position of the shafts 2 and 3 is shifted, which ensures the angular shift of the cam shaft 12.

The device has a simple design.

Claims (2)

1. A device for controlling the valve timing, comprising a drive pulley and a drive, the cam shaft of the timing mechanism being connected to the shaft, characterized in that the drive is made in the form of two planetary gears with the same gear ratio, each of which contains a central shaft kinematically connected to the central wheel through a satellite movably mounted in the common carrier, and the central shaft of one of the planetary gears is connected to the driving pulley of the gas distribution mechanism, and the central wheel is stationary oh another central shaft of the planetary gear is connected with a camshaft timing mechanism and its central wheel associated with a rotary actuator. 2. The variable valve timing control device according to claim 1, characterized in that the planetary gears are made with sprockets.

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