JPS612986A - Thermosensor for water cooled engine - Google Patents

Abstract

PURPOSE:To aim at making smooth the stream of cooling water in a valve seat section, and to prevent dust from sticking to the valve seat, by arranging a valve element upstream of the valve seat. CONSTITUTION:A support section 33 is disposed downstream of a valve seat 25, being integrally incorporated with the latter, a spring member 34 is disposed between a valve element 27 and the support section 33. This spring member 34 may urge the valve element 27 toward a close position where the valve element 27 closes the valve seat 25. Further, an actuating member 35 is disposed in the valve element 27, and may displace the valve element 27 due to an expansion in a thermosensing element 31 to a position where the valve element 27 opens the valve seat 25. Accordingly, since only the valve element 27 may be disposed upstream of the valve seat 25, the stream of cooling water become smooth in the valve seat section, and it is possible to prevent dust from sticking to the valve seat.

Description

[Detailed description of the invention] [Technical field] The present invention relates to a temperature-sensitive actuation jF for a water-cooled engine.

"Background technology" In water-cooled engines for marine propulsion devices, etc., a temperature-sensitive operating valve is installed at the outlet of a water jacket formed in the engine body, and the temperature-sensitive operating valve is activated by changes in the temperature of the cooling water inside the water jacket. The temperature of the cooling water inside the wooden jacket can be adjusted by opening and closing the valve. Therefore, this temperature-sensitive valve repeatedly opens and closes at a small opening during low-load engine operation, and under such operating conditions, if there is any disturbance in the collapse of the cooling water passing through the valve seat. , a portion of the valve seat where the flow of cooling water becomes difficult may occur, and dirt may become entangled in this portion of the valve seat, which may impede the normal opening/closing operation of the temperature-sensitive valve.

However, conventional temperature-operated valves include a frame-like support part that is integrated into the valve seat, a spring body that can bias the valve body to the closed position with respect to the valve seat, and a temperature-sensitive body. Structures that tend to cause turbulence in the flow, such as a moisture-sensitive body housing part that accommodates the temperature-sensitive body, and an actuating body that protrudes from the humidity-sensitive body housing part when the temperature-sensitive body expands and displaces the valve body to an open position relative to the valve seat. The valve seat is disposed on the downstream side of the valve seat, which obstructs the normal opening and closing operation of the temperature-sensitive valve, causing the inconvenience of overcooling and stopping the engine.

For example, in the temperature-sensitive actuated valve shown in Utility Model Publication No. 50-2099, although the spring body is placed downstream of the valve seat, the support part, moisture-sensitive element housing part, and actuating body are still located on the valve seat. However, the temperature-sensitive valve is located on the flow side, and the factors that inhibit the normal opening and closing operations of the temperature-sensitive valve have not yet been eliminated.

[Object of the Invention 1] An object of the present invention is to ensure normal opening and closing operations of a temperature-sensitive valve and to stabilize the operating state of an engine.

[Structure of the Invention] In order to achieve the object described in , the present invention provides a method for water-cooled engines that is disposed at the protruding part of a wooden jacket formed in the engine body and that opens and closes according to changes in the temperature of the cooling water in the water jacket. In a temperature-sensitive operated valve, a valve seat held at an outlet portion of a water jacket, a valve body disposed at least one stream side of the valve seat while accommodating a temperature sensing element, and integrated with the valve seat. a support part disposed downstream of the valve seat in a state where the support part is disposed between the valve body and the support part, and a support part disposed downstream of the valve seat in a state where the valve body can be biased to a closed position with respect to the valve seat. The spring body is inserted into the valve body, and when the temperature sensing element expands, it protrudes outside the valve body.The protruding part is supported by the support part, and the valve body can be moved to the open position relative to the valve seat. and an actuating body disposed downstream of the valve seat.

[Detailed Description of the Invention] FIG. 1 is a side view showing an outboard motor to which the present invention is applied, FIG. 2 is a sectional view showing an embodiment of the present invention, and FIG. It is an arrow view along the line ■-■.

The outboard motor 10 is attached to the hull of the boat via a bracket 11 so that it can be tilted up and steered. Outboard 41!1
An engine 12 is mounted on the L section of 0, and the output of the engine 12 is transmitted to the lower propeller shaft 14 via a drive shaft 13, and the propeller 1 is directly connected to the propeller shaft 14.
5 can be rotated.

The engine 12 has an engine body 16 made up of a cylinder block and a cylinder hend, and a water jacket 17 that allows cooling water to circulate is formed in the engine body 16.

A water pump 19 is connected to the inlet side of the water jacket 17 via a water supply channel 18. The water pump 19 can be driven by rotation of the drive shaft 13. That is, the water pump 19 is driven when the engine 12 is operating, and pumps open water, such as seawater, sucked in from the outside through the open water intake port 20 and the open water introduction pipe 21, and pumps it through the water supply channel 18 into the water tank (17).
It is possible to send it under pressure.

Further, the outlet side of the wooden jacket 17 can communicate with a drainage channel 23 via an outlet portion 22. A temperature-sensitive operating valve 24 is disposed in the outlet 1 section 22.

That is, when the water temperature in the water tank 17 reaches a predetermined temperature, the temperature-sensitive operating valve 24 is opened, and the cooling water that has cooled the engine 12 is discharged to the outside from the drain passage 23, and the water tank is ) 17 can be adjusted.

The temperature-sensitive actuated valve 24 includes a valve seat 25 that is held transversely to the outlet 22 of the water jacket 17 . The valve seat 25 can be held in the engine body 16 via a rubber body 26 attached to its outer periphery.

Furthermore, the temperature-sensitive operating valve 24 includes a valve body 27 . The valve body 27 consists of a head part 28 and a leg part 29, and the main part of the head part 28 is arranged on the downstream side 30A of the valve seat 25.
The portion 29 is arranged on the downstream side 30B of the valve seat 25. The valve body 27 forms a closed state of the temperature-sensitive valve 24 by bringing the head 28 into contact with the valve seat 25, and brings the head 28 into contact with the valve seat 25.
The open state of the temperature-sensitive operating valve 24 can be formed by separating the temperature-sensitive valve 24 from the temperature-sensitive valve 24 by 3OA on the 1-stream side with respect to the valve 5. Here, inside the head of the valve body 27, a temperature sensitive body (wax) 31 whose volume increases as the ambient temperature increases by 1 is accommodated.

Further, the temperature-sensitive operating valve 24 includes frame-shaped support portions 32 and 33. The support 32 , 33 is arranged on the downstream side 30B of the valve seat 25 in such a manner that it is integrated with the valve seat 25 .

Further, the temperature-sensitive actuated valve 24 is disposed between the valve body 27 and the support portion 32, and is positioned downstream of the valve seat 25 in a state where the valve body 27 can be biased to the closed position relative to the valve seat 25. A spring body 34 is provided.

In addition, the temperature-sensitive actuated valve 24 is inserted into the valve body 27 and protrudes toward the outside of the valve body 27 due to the expansion of the temperature-sensing body 31, so that the protruding portion abuts against the support portion 33. The actuating body 35 is supported by the actuating body 35 and capable of displacing the valve body 27 to the open position relative to the valve seat 25. The operating body 35 is
It is arranged on the downstream side 30B of the valve seat 25.

That is, when the water temperature at the outlet 22 of the water jacket 17 is below a predetermined value, the valve body 27 is brought into contact with the valve seat 25 by the biasing force of the spring body 34, and the temperature-sensitive operating valve 24 is closed. In addition, when the water temperature at the outlet portion 24 reaches a predetermined value, the valve element 27 is separated from the valve seat 25 by the operation of the temperature sensing element 31, and the temperature sensing valve 24 can be opened. .

Next, the operation of the first embodiment will be explained.

When the engine 12 starts, the water pump 19 is activated.
Outside water is connected to an outside water intake port 20, an outside water introduction pipe 21, and a water supply channel 1.
8 to the water jacket 17 to cool the engine body 16. This cooling water is guided to the outlet portion 22 of the water jacket 17 and remains around the head 28 of the valve body 27 of the temperature-sensitive valve 24 . When the cooling water temperature in the outlet 1 section 22 reaches a predetermined value 1-, the operating body 35 protrudes against the biasing force of the spring body 34 due to the expansion of the temperature sensing element 31, and the valve body 27 moves toward the valve seat. Temperature-sensitive valve 24 is spaced apart from 25.
is opened, and the cooling water after cooling the engine 12 is discharged to the outside via the drainage channel 23.

Therefore, in the above embodiment, the L flow side 3 of the valve seat 25
Only the head 28 of the valve body 27 is placed at 0A, and the flow of cooling water passing through the valve seat 25 is smoothed, and there are parts of the valve seat 25 where the flow of cooling water is difficult. Therefore, it is possible to prevent dust from getting entangled with the valve seat 25, and it is possible to ensure normal opening and closing operations of the temperature-sensitive valve 24. In addition, in the embodiment described in "-", the flow of cooling water around the temperature sensing element 31 is less likely to be disturbed, the cooling water temperature is correctly transmitted to the temperature sensing element 31, and the opening/closing accuracy of the temperature sensing valve 24 can be improved. be.

Therefore, according to the embodiment described in "-", in an outboard motor lO that constantly takes in outside water that is likely to be contaminated with dirt, the engine 1
It becomes possible to stabilize the operating state in step 2.

[Effects of the Invention] As described above, the present invention provides a temperature-sensitive operating valve for a water-cooled engine that is disposed at the outlet of a water jacket formed in an engine body and that opens and closes depending on changes in the cooling water temperature within the water jacket. , a valve seat held at the outlet of the water jacket, a valve body disposed at least on the flow side of the valve seat while accommodating the temperature sensing element, and a valve body disposed downstream of the valve seat in a state integrated with the valve seat. a support disposed on the side; and a spring disposed downstream of the valve seat, the spring being disposed between the valve body and the support and capable of biasing the body into a closed position relative to the valve seat. The valve body is inserted into the valve body and protrudes outward from the valve body due to expansion of the temperature sensitive body, and the protruding portion is supported by the support part to enable the valve body to be displaced to an open position with respect to the valve seat. and an actuating body disposed downstream of the valve seat. Therefore, the valve body is simply placed on the -Lffi side of the valve seat, which smooths the flow of cooling water through the valve seat and prevents dirt from getting entangled with the valve seat, making it possible to prevent dust from getting entangled with the valve seat. It is possible to ensure normal opening and closing operations and stabilize the operating state of the engine.

[Brief explanation of drawings]

FIG. 1 is a side view showing an outboard motor to which the present invention is applied;
FIG. 2 is a sectional view showing one embodiment of the present invention, and FIG.
It is a view taken along the line ■-■ in the figure. 12... Engine, 16... Engine body, 17.
...Water pump, 22...Outlet part, 24...Temperature-sensitive operation jt, 25...Valve seat, 27...Valve body, 30A
. . . Stream side, 30B . . . Stream side, 31 . . . Temperature sensing element, 32. 33 .
... Working body.

Claims (1)

[Claims] (1) A temperature-sensitive operating valve for a water-cooled engine that is disposed at the outlet of a water jacket formed in the engine body and opens and closes depending on changes in the cooling water temperature within the water jacket, the valve held at the outlet of the water jacket. a valve body disposed at least upstream of the valve seat while accommodating the temperature sensing element;
A support part that is integrated with the valve seat and is disposed on the downstream side of the valve seat, and a state that is arranged between the valve body and the support part so that the valve body can be biased to a closed position with respect to the valve seat. A spring body is placed on the downstream side of the valve seat, and the spring body is inserted into the valve body and protrudes outward from the valve body when the temperature sensing element expands.The protruding part is supported by the support part to hold the valve body. 1. A temperature-sensitive actuated valve for an ice-cooled engine, comprising: an actuating body disposed downstream of the valve seat so as to be movable to an open position with respect to the seat.