JPS6347609Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a variable cylinder control unit, and more particularly, to a variable cylinder control unit provided with a stopper.

In order to save energy and improve combustion, the cylinders that operate may be changed depending on the engine load. In this case, the fuel injected from the carburetor is cut off according to input signals from the engine (engine negative pressure, vehicle speed, throttle opening, etc.) and the intake and exhaust valves continue to open and close, and the valve lift mechanism of the internal combustion engine is used. A well-known pressure-feed type latch adjuster is installed in the engine, and the rigidity of the latch adjuster is removed in response to an input signal from the engine, stopping the valve lift operation and interrupting the opening/closing operation of the intake and exhaust valves. There is. Examples of the latter are described in Japanese Patent Application Laid-Open No. 54-57009 or Japanese Patent Application No. 57-62693 and Japanese Patent Application Laid-Open No. 58-180709.

As shown in the attached FIG. 1, such a conventional variable cylinder control unit has an adjuster support 2 press-fitted into a bore of an engine housing 1.
An adjuster body 3 having a plunger 4 disposed therein is slidably fitted therein, and the bottom of the adjuster body 3 is made to cooperate with a rocker arm support 5. The rocker support 5 swingably holds the rocker arm 6 at a fulcrum 7. One end of the rocker arm 6 is in contact with the camshaft 8, and the other end of the rocker arm 8 is connected to the valve stem of the intake and exhaust valve (not shown).
to support. Also, pressure-feed type lash adjuster 9
The reservoir chamber 10 and the pressure chamber 11 are connected to a ball valve 12.
The conduction is controlled by The ball valve 12 is
When the valve rod 14 is moved by the operation of the solenoid valve 13 which receives an input signal from the engine, it is opened and the pressure chamber 11 and the reservoir chamber 10 are made to have the same pressure, and the adjuster body 3 receives only the biasing force of the subring 15. become. Therefore, the rigidity of the pressure-feed type latch adjuster 9 is removed, and the rocker arm 6 changes from swinging around the fulcrum 7 of the rocker support 5 to rocking around the support between the rocker arm and the valve stem. Allow the valve to remain closed.

This type of variable cylinder control unit is
Pressure feed type latch adjuster 9 and rocker arm 6
The rocker support 5 which is pivotally supported is made into a unit, and this unit is attached to the engine by a method of assembling it to the engine housing 1. During this assembly process, the lash adjuster and rocker support may fall off, making normal assembly difficult.

This invention is intended to solve the above-mentioned conventional problems, and basically uses a technical means to lock one end of a stopper fixed to the engine housing to a rocker support. This technical means does not change the basic structure of the variable cylinder control unit and only requires the installation of the stopper, so it does not significantly increase the number of manufacturing steps.

An example of this invention will be explained with reference to the accompanying drawings.

The stopper 16 is provided with side walls 19 that extend downward from opposite sides of a top wall 18 having bolt insertion holes 17, and locking pieces 20 that extend outward from the tips of both side walls 19. composition. The stopper 16 is fixed to the housing wall between both rocker supports 5 with bolts 21. By fixing the stopper 16 to the housing wall 1, the locking piece 20 of the stopper
is opposed to the base 22 of the rocker support 5, and the rocker support 5 and the latch adjuster 9 are prevented from falling off by the contact of the locking piece 20 with the base 22.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an example of the present invention applied to a conventional variable cylinder control unit, FIG. 2 is a front view of a stopper, and FIG. 3 is a plan view of the stopper. In the figure, 1... Engine housing, 5... Rocker support, 9... Pressure feed type latch adjuster,
12...Ball valve, 13...Solenoid valve,
16... Stoppa.

Claims (1)

[Scope of utility model registration request] A pressure-feeding type latch adjuster supported by the engine housing, a rocker support interlocking with the latch adjuster and pivotally supporting the rocker arm, and a ball valve in the latch adjuster that operates in response to an engine input signal. A variable cylinder control unit comprising a solenoid valve that controls opening and closing of the engine, and a stopper that is fixed to the engine housing and whose locking piece locks to the rocker support.