JPS6320826Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a device that adjusts the amount of cooling water in an internal combustion engine according to the engine speed, in particular, a throttle lever and a valve operation lever connected to a fresh water cut valve installed in a cooling water passage. This invention relates to a device that, when linked together, prevents the generation of blue-white smoke in cold weather and prevents engine overheating in summer.

Conventionally, a cooling device provided in an internal combustion engine such as a marine diesel engine is configured as shown in FIG. 1, for example.

That is, the cooling water outlet passage 3 of the engine 1 is included in the cooling circuit connecting the engine 1 and the fresh water cooler 2.
branched from the bypass passage 4 of the fresh water cooler 2
A thermostatic valve 6 is provided at the confluence of the fresh water cooler bypass passage 4 and the outlet side passage 5 of the fresh water cooler 2,
A switching valve 8 (so-called fresh water cut valve) for opening and closing the flow path 3 is provided in the cooling water outlet flow path 3 between the cooling water outlet flow path 3 and the branch portion of the fresh water cooler bypass passage 4.

As a fresh water cut valve operating mechanism for such a cooling device, one constructed as shown in FIG. 2 is conventionally known.

That is, a valve operating shaft 10 is provided on the valve body 9 of the fresh water cut valve 8, one end of a remote control cable 12 is engaged with a lever 11 fixed to the valve operating shaft 10, and the other end of the remote control cable 12 is connected to the fuel. The remote control cable 15 is connected to the control lever 14 of the injection pump 13, and the other end of the remote control cable 15, which has one end connected to the control lever 14, is connected to the slot lever 17 of the remote control handle base 16 disposed at the hand of the engine operator. Throttle lever 1
7 to the deceleration side shown by arrow A, the valve body 9 inside the switching valve 8 closes the cooling water outlet passage 3 of the engine 1, and conversely, the throttle lever 17 is turned to the speed increasing side shown by arrow B. When rotated to the side, the valve body 9 rotates so that its main valve hole 18 matches the valve outlet 19, and the valve inlet 20 and the valve outlet 19 are in communication through the hand valve hole 18. It is configured.

However, in the above-described conventional fresh water cut valve operation mechanism, the control lever 14 of the fuel injection pump 13 and the lever 11 of the fresh water cut valve 8 are connected by a remote control cable 12. If warm-up operation is performed for a long time when the cooling water temperature is relatively high, the cooling water in the engine 1 will be trapped by the fresh water cut-off valve 9, and the temperature will rise, causing overheating of the engine. Even when the throttle lever 17 is turned to the deceleration side again after the engine has finished operating and started normal operation, the fresh water cut valve 9 is activated, causing the engine to overheat.

The present invention focused on the problem of engine overheating caused by unnecessary operation of the fresh water cut valve that conventional internal combustion engines had, and placed a valve operation lever connected to the fresh water cut valve with a remote control cable in a position near the slot lever. By interlocking both levers,
When the engine has finished warming up, or when the cooling water temperature is high during the summer, the fresh water cut valve is kept in communication to prevent the engine from overheating. In an internal combustion engine, the throttle lever of the remote control handle base is connected to the throttle lever of the remote control handle base using a remote control cable, and a fresh water cut valve is provided between the cooling water outlet of the engine and the fresh water cooler. A valve operating lever connected to the cut valve via a remote control cable is provided, and when the throttle lever is rotated in the speed increasing direction between the throttle lever and the valve operating lever, or the valve operating lever is The structure includes an intervening engagement and connection mechanism that connects both levers when rotated in the valve closing direction.

Hereinafter, specific contents of the present invention will be explained in detail based on embodiments shown in the accompanying drawings.

FIG. 3 is a schematic diagram showing an embodiment of the cooling water section adjusting device of the present invention, and FIG. 4 is a plan view of the handle base portion of the device.

In each of these figures, 21 is a fixing plate provided on the bridge of a ship, etc., and 22 is a hole 2 of the fixing plate 21.
3 is fitted with a handle base for operating the engine; 24 is a clutch operating lever rotatably attached to the handle base 22; 25 is coaxial with the clutch operating lever 24 and is on the opposite side of the handle base 22; A remote control cable 26 with one end connected to the throttle lever 25 is inserted into an outer tube 27 and the other end is connected to a control lever 29 of a fuel injection pump 28 attached to the engine. When the throttle lever 25 is rotated in the direction of increasing speed as indicated by the arrow X in FIG. When the control lever 29 is rotated to the side, the control lever 29 is configured to rotate in the fuel reduction direction. On the other hand, 30 indicates a hole 2 of the fixed plate 21 in the vicinity of the engine operating handle base 22.
3', on which a valve operating lever 31 adjacent to the throttle lever 25 and rotating coaxially with the lever 25 is tiltably supported. The remote control cable 32, which has one end connected to the valve operation lever 31, has the other end inserted into an outer tube 33 and connected to a fresh water cut valve 34 provided in the engine cooling circuit.
The lever 35 is engaged with the valve operating lever 31.
When the valve is rotated in the valve-opening direction shown by arrow a in FIG. , the fresh water cut valve 34 is closed.

Furthermore, in the figure, 36 is the throttle lever 25.
The engagement coupling mechanism 36 is interposed between the valve operating lever 31 and the levers 25 and 31 and interlocks the levers 25 and 31 with each other. A connecting arm 37 is provided protruding from the side, and the tip 37a of the connecting arm 37 is brought into contact with the side surface of the valve operation lever 31, and the throttle lever 25 is rotated to the speed increasing side as indicated by the arrow X in FIG. or when the valve operating lever 31 is rotated in the valve closing direction shown by arrow b, that is, in the direction in which the fresh water cut valve 34 is closed, both levers 25, 31
The levers 25 and 31 are connected and rotated together in the same direction, and otherwise the levers 25 and 31 are separated.
Each one rotates independently.

The cooling water amount adjusting device of the present invention has the above-mentioned configuration. Next, its operation will be explained. First, when cold starting the engine in cold weather, first move the throttle lever 25 in the direction of arrow Y. The valve operating lever 31 is rotated in the direction of arrow b to a position where it contacts the connecting arm 37 of the throttle lever 25.

At this time, the valve operation lever 31 is located in line with the throttle lever 25 and the fresh water cut valve 34 is closed, so the circulation of the engine cooling water is regulated by the fresh water cut valve 34 and the temperature rise is promoted. This prevents the generation of blue-white smoke. When the engine comes out of idling, the throttle lever 2
5 is rotated toward the speed increasing side shown by arrow
By rotating in the direction, the fresh water cut valve 34 gradually opens, and a valve opening degree corresponding to the position of the throttle lever 25 is obtained.

After that, when the throttle lever 25 is returned to the deceleration side indicated by arrow Y to perform low-speed operation, the engagement between the valve operating lever 31 and the connecting arm 37 is released, and only the throttle lever 25 rotates independently. death,
Since the valve operating lever 31 remains in the same position, the fresh water cut valve 34 remains open.
Abnormal temperature rise of the cooling water is suppressed, and overheating of the engine is prevented.

In addition, when the engine is stopped, the valve operation lever 3
1 in the direction of arrow b, the fresh water cutoff valve 34 is closed in preparation for the next cold start, shortening the warm-up operation time and preventing the generation of blue-white smoke. When the water temperature is relatively high and there is no need to operate the fresh water cut valve 34, overheating of the engine can be prevented by opening the fresh water cut valve 34 by tilting the valve operating lever 31 in the direction of arrow a in advance.

Further, the engagement coupling mechanism in the above embodiment includes a coupling arm 37 protruding from the throttle lever 25.
However, the structure of this engagement coupling mechanism is not limited to the above embodiment, and the throttle lever 25 and the valve operating lever 31 may be placed in a similar relationship. Needless to say, any mechanism that can be connected and disconnected is applicable.

As described above, the cooling water amount adjusting device of the present invention has a valve operation lever connected to the fresh water cut valve disposed near the throttle lever connected to the control lever of the fuel injection pump. When an engagement coupling mechanism is interposed between the valve operation lever and the throttle lever is rotated in the speed increasing direction by the engagement coupling mechanism, or
When the valve operating lever is rotated in the valve closing direction, both levers are rotated as a unit; otherwise, each lever can be rotated independently, and after the engine leaves the idling state. Alternatively, when the engine cooling water temperature is high enough at the time of engine startup, the fresh water cut valve can be kept open at will, so even though the engine cooling water temperature is high as in conventional internal combustion engines, the throttle The fresh water cut valve closes in response to the movement of the tuttle lever, which eliminates the inconvenience of cutting off the circulation of cooling water and has the excellent effect of preventing engine overheating.

Moreover, according to the present invention, if the valve operating lever is previously positioned in the opening direction in the summer, or after the engine has stopped idling and the valve operating lever has been rotated in the valve opening direction, the throttle lever can be rotated independently. Because of this, it can be expected to have the effect of greatly reducing the operating force required to operate the engine.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a cooling device installed in a conventional internal combustion engine, Fig. 2 is a schematic diagram showing an example of a conventional fresh water cut valve operation mechanism, and Fig. 3 is an example of a cooling water amount adjusting device of the present invention. FIG. 4 is a plan view of the handle base portion of the device. 22... Remote control handle base, 25... Throttle lever, 26, 32... Remote control cable,
28... Fuel injection pump, 29... Control lever, 31... Fresh water cut valve operating lever, 34
... Fresh water cut valve, 36 ... Engagement connection mechanism.

Claims (1)

[Scope of utility model registration request] In an internal combustion engine, the control lever of the fuel injection pump and the throttle lever of the remote control handle base are connected by a remote control cable, and a fresh water cut valve is provided between the cooling water outlet of the engine and the fresh water cooler. A valve operating lever connected to the fresh water cut valve via a remote control cable is disposed near the throttle lever, and the throttle lever is rotated in the speed increasing direction between the throttle lever and the valve operating lever. Or
A cooling water amount adjusting device for an internal combustion engine, characterized in that an engagement coupling mechanism is provided to connect both levers when the valve operating lever is rotated in the valve closing direction.