JPS6090906A - Valve suspending device in engine - Google Patents

Abstract

PURPOSE:To facilitate adjustment of a tappet by branching and forming a fluid inlet port through a changeover valve in the intermediate of a passage of fluid to an actuator which switches a state wherein a pair of valves are opened and closed and a state wherein only one valve is actuated and another is suspended. CONSTITUTION:A pair of at least one of suction and exhaust valves are provided with respect to each cylinder, and one 51, for example, of the pair of rocker arms 51 and 52, which open and close a pair of valves, is provided so that the rocker arm 52 can be engaged with or disengaged from another rocker arm by means of a fluid actuator 10. A fluid passage 15 leading to the fluid actuator 10, is switched and connected to a flow-in passage 16 or an exhaust passage 17 by means of a control valve 13 having a spool valve 18. Further, in the intermediate of the exhaust passage 17 is branched therefrom a fluid inlet port 21. At a branched part 22 is provided a changeover valve 24 which cuts off communication between a half part 17a on one side of the exhaust passage 17 and a half part 17b on another side thereof and communicate the inlet port 21 with the half part 17a.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stop device for an engine used mainly in motorcycles and other vehicles, and more particularly, to The two lubricants are arranged in parallel in a pair of at least one of the pulp and exhaust pulp, and can be freely switched between a state in which both of the pair of pulps are operated to open and close, and a state in which only one of them is operated and the other is stopped. This invention relates to a valve stop device.

Conventionally, this type of device is provided with a pair of rocker arms 2 corresponding to a pair of valves, one of which is engaged with a valve drive cam, and the other rocker arm is engaged with and disengaged from the one rocker arm by a fluid actuator. The fluid is connected to an oil pump driven by the engine or other front body pressure source through a roadside control valve. A switching connection is made between the inflow passage and the discharge passage, and the fluid path is connected to the inflow passage and the discharge passage. When connected to the inflow passage, both locking arms engage with each other, and a valve operating cam that engages one of them opens and closes a pair of valves together through both rocker arms, and the fluid flow path. When connecting the valve to the discharge passage, the double-ended lock arm is disengaged, and only one pulp is opened/closed via one of the rocker arms that engages with the valve operating cam, while the other pulp is at rest. In this case, when the engine is stopped, the operation of the fluid pressure source is also stopped, and even if the control valve is switched to the pressure source side, the two end hook arms are not held together. As a result, the other rocker arm of the double-ended lock arm that engages with the valve drive cam no longer interlocks with the valve drive cam, and the tappet adjustment of the other rocker arm! B cannot be performed accurately, and when adjusting the tappet, it is necessary to use a fluid actuator using fluid pressure from a pressure source such as a separately prepared compressor or oil pump. In this case, it is desirable to be able to engage the double-ended hook arms with each other by actuating the pressure source without further modifying the piping of the device.
It is desired to improve workability by connecting to the fluid passage.

It is an object of the present invention to provide a device that satisfactorily meets such requirements, and which differs from the conventional device described above in that it has several channels of fluid passages, inflow passages, and discharge passages. Is there a fluid inlet in the middle of the passage that branches off from the hole?
and communication between one half of the passage and the other half extending from the branch to the fluid actuator side by introducing light body pressure from the inlet into the branch of the passage; Is this the - side half Vc the inlet? A continuous switching valve? The following features are provided.

Next, the present invention will be explained with reference to fully illustrated embodiments.

In the drawing, (1) indicates an engine, and the engine (1) has one intake valve and one exhaust valve (3) in the same cylinder (2).
IL shall be provided for the cylinder head (4) i.
For each cylinder (2), one pair of first 20th lever arms (5I) (5I) for intake and one pair of exhaust
2) The valves (51, 52) are mounted on a common rocker arm shaft (6), and are connected to the tappet adjustment screw (7) at the tip of each rocker arm (51) (52). 3a), and the valley rocker arm (51
) (52) to open and close the respective valves (3). ) At the groove ξ(3) formed in the slot, the valve operating force J-(91 is engaged, and the other 20th lever arm (52)'kff, the body actuator αtjvC,!: the foil 10 lever arm (5
1) can be freely connected and disconnected. To be more detailed,
The fluid actuator Ql includes, for example, an engagement pin (10a) provided between the double-ended hook arms (51) and (52), and an upward cylinder (1) of the tenth hook arm (51) that moves forward and backward.
0b), and when the light body pressure is introduced into the cylinder (10b), the engagement bottle (10a) is inserted into the engagement hole Oυ formed in the 20th hook arm (52). Insert the cushion bottle against the shell and insert the double-ended arm (5
1) (52) are engaged with each other, and the cylinder (10b)
According to the discharge of the light body pressure, the engagement pin UOa) is pushed out from the engagement hole 0η from the cushion pin a'avc, and the two rockers A (5t) (52) are secured. I tried to solve it.

In the drawing, 0 indicates a control valve provided on the outside of the cylinder spatula FC4), and the control valve 03 is connected to the fluid passage arjk engine (1
) is equipped with a sub-valve Q81 that connects the inflow passage OQ and the discharge passage 07) connected to an oil pump (not shown) or other fluid pressure source (not shown), which is driven by IL. The spool valve 081 is switched and connected to the inflow passageway of the driftwood a to connect the above-mentioned double-ended hook arm (5+) (52).
11: Connect the recommended body abutment path 1c and the discharge passage θ force 1c so that the disengagement and release of the force 1c will occur.

In the drawing, the inflow passage (L'91c) indicates the connected accumulator.

The above is not particularly different from that of the conventional example described above, but according to the present invention, 1L has at least one of the above-mentioned source tracing path, inflow passage (G), and discharge passage (171). A fluid inlet υ is provided in the middle of a passage, for example, a discharge passage 0η, branching off from a pipe.
By introducing the fluid pressure of υ〃1, one half of the passage aD and the other half of the passage aD extending from the branch part (■) to the fluid actuator α1 side, that is, the exit path (17) K is O
All communication points between the upstream half (17a) connected to Susol valve 4 and the downstream half (17b) connected to the drain port (2) to the cylinder head (4) are connected to the downstream half. (17a)
A switching valve will be provided to connect all of the inlets. In this case, the switching valve (goods) may be configured as a susol type, but in the illustrated one, the switching valve (goods) is
As clearly shown in FIG. 3, the opening end of the downstream half (17b) facing the branch part is pushed by the fluid pressure introduced from the introduction tube JJ7). a plunger to be closed), and a concave hole v1 connected to the upstream half (17a) Ic and a valve hole ridge connected to the inlet port IK are formed in the plunger 4,
A check valve biased in the direction of closing the recessed hole (b) and the valve hole (VC) is installed, thereby facilitating miniaturization of the switching valve (c).

In the drawing (25a) is a return spring (25a) for the shell/jar).
8a) (28b) is the biasing spring of the check valve (G) and its spring receiving piece, and is the stopper in the return direction of the sylanger attached to the inlet port clυVc. A joint tool that also serves as an external piping connection (... indicates a cap attached to the joint tool).

Next, to explain its operation, the engine (11) must be completely stopped and the cap (7) must be removed.
A pressure source prepared separately through a joint Hk for all four fluid lines Cυ? This will connect the switching valve (to) with the fluid pressure introduced from the introduction tube υ.
The downstream half of discharge passage 1b gθ is pushed by the
The upper opening ll1i of 17b) is closed rL, upstream t',!
When communication between the eleventh half (17a) and the downstream half (17b) is completed, the check valve (g) opens and the introduction tube υ is transferred to the upstream half. li (17a). Thus, the flow through control valve CIJ [;[passage 0
1 and the discharge passage 0η and the vine connection 1'L f, the inlet ■
The fluid pressure from the body actuator (1 (introduced into the body, first 20
The lever arms (5x) (52) are engaged with each other, and the 20th lever arm (52) which is not engaged with the valve drive cam (9) is also connected via the 10th lever arm (5+) IC. The 20th lever arm (attached to the valve train cam (9))
The tappet adjustment (52) can also be performed accurately by rotating the tappet adjustment screw (7) in the usual manner.

Note that the fluid inlet e211 may be provided in the fluid passage QI9 or the inflow passage (to), but these passages 0υQ (il K
Since high fluid pressure is applied when the double-ended hook 1-m (5s) (52) is engaged, fluid leakage from the inlet port V becomes a problem, whereas in the above embodiment, When the fluid flow rate jυ is provided in the discharge passage Q shift as shown in FIG. Also, as shown in the figure, the fluid actuator un? I-In the case where multiple actuators are provided, a fluid inlet C2t is installed at a passage position that communicates with each actuator αQ.
It is preferable to provide one for common use.

In this way, according to the present invention, a pair of rocker arms? A fluid passage leading to a fluid actuator actuated to engage each other and a control valve? A fluid pressure port is branched into the inflow passage and the discharge passage, which are connected to a switchable VC via the VC, and the fluid pressure of the fluid is introduced into the branched part. This is a switching valve that operates to supply only to the actuator side, and a separate one is installed at the inlet.
1. Low pressure source? Just by connecting, the pair of rockers B=F can be engaged with each other, allowing tappet adjustment when the machine/engine is stopped. These fluid inlet ports and switching valves can be easily installed in existing equipment by partially changing the passage configuration, and have the effect of being easy to apply to existing equipment.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view of an example of an engine to which the device of the present invention is applied, FIG. 2 is a cutaway plane view thereof, and FIG. 3 is an enlarged cutaway plan view of the main parts thereof. (11...Engine [2)...Cylinder (3)...
Pal f L5s) (52)...Rocker arm O(
J... Fluid actuator a4... Control valve (7)... Driftwood passage αG... Inflow passage 07)... Discharge passage 141... Driftwood inlet (4)... Branch (to )...Switching valve (A)...
・Plunger (2)...in the recessed hole)...in the valve hole)...check valve patent Applicant: Honda Motor Co., Ltd.

Claims (1)

[Scope of Claims] Engineering, At least 10,000 nonorubu (intake nonorubu) and exhaust pulp provided in the same cylinder of an engine are arranged in parallel in a pair, and one nonorubu corresponding to the pair of nonoruzo is arranged in parallel. A pair of rocker arms are provided, one of the rocker arms is engaged with a valve cam, and the other rocker arm is made to be freely engageable and detachable from the one rocker arm in the same way as a hydraulic actuator, and fluid pressure is introduced into the actuator. In the fluid passage 2 that can be switched and connected to the inflow passage and the discharge passage δ connected to a fluid pressure source driven by the engine via a control valve that provides operation in the engagement direction, these Is there a fluid inlet port branched from this hole in the middle of at least one of the fluid passages, inflow passages, and discharge passages? All the communication points between one half of the passage and the other half extending from the branch to the actuator side by introducing fluid pressure from the inlet into the branch of the passage are provided. A switching valve that communicates the inlet with the - side half? A pulp suspension device in an engine is provided with two features. 2. Is the passage in which the inlet is provided the same as the discharge passage?
A pulp suspension device in an engine according to claim 1. 3. The switching valve? , a syringe that is pushed by the fluid pressure introduced from the inlet to close the open end of the other half facing the branch, and is connected to the - side half. A patent characterized in that the recessed hole is formed with a valve hole connected to the inlet, and a check valve biased in the direction of closing the valve hole is attached to the recessed hole. A device for suspending pulp in an engine according to claim 1 or 2.