JPH0310003B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circulating water-cooled water supply control pump for an internal combustion engine, and particularly to a pump that controls water supply in response to water temperature.

Conventionally, as shown in FIG. 1, in this type of control pump, a shaft 3 is rotatably attached to a pump housing 1 via a bearing 2, and a pulley 4 and a cooling fan 5 are attached to the outside of the shaft 3. On the other hand, an impeller 6 was connected inside the pump housing 1 at the other end. Therefore, when the temperature of the cooling water inside the pump housing 1 is low, when the engine is running, the cooling water is circulated and agitated by the impeller 6, even though there is no need to circulate the cooling water yet, which wastes energy unnecessarily. was. Furthermore, this also has the disadvantage of hindering engine warm-up and further reducing combustion efficiency.

The present invention solves these conventional problems by attaching a fluid coupling whose rotation is controlled in response to the temperature of cooling water in the vicinity of the temperature sensing element provided in the pump housing. The rotation of the engine is controlled to reduce horsepower consumption and fuel consumption. An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a sectional view showing an embodiment of the water temperature sensitive water supply control pump of the present invention. As shown in the figure, a shaft 3 is rotatably supported by a pump housing 1 via a bearing 2, and cold air is blown into one outer end of the shaft 3 through a pulley 4 connected to the engine and a radiator (not shown) to connect the engine. A cooling fan 5 is attached to the other end of the shaft 3, that is, inside the pump housing 1, and a known fluid coupling is installed at the other end of the shaft 3, that is, inside the pump housing 1, which transmits rotational force from the driving part side to the driven part side by the viscosity of the fluid. A is attached to the drive section side, and a temperature sensing element 7 is attached to the driven section side to sense the temperature of the cooling water and control its rotation. Also,
An impeller 6 is directly connected to the driven portion side of the fluid coupling A, and the rotation of the impeller 6 circulates cooling water and operates the pump. Note that the fluid coupling A has a bearing 1 on the side of the sealer housing, which is made up of a case 8 and a case cover 9.
There is a partition plate 11 in the sealing case that has an inflow adjustment hole 11a, which is supported by an oil sump chamber 12 and a transmission chamber 13. A rotor 14 on the drive side is mounted with a small gap for torque transmission between the inner wall of the casing and the opposing wall surface, and its shaft is fixedly installed inside the shaft 3. Further, on the oil reservoir chamber 12 side, a valve 1 supported on a support shaft 11b of the support plate 11 is provided.
5 is provided, and the inflow adjustment hole 11 is adjusted by the spring 16.
A is closed and pressed. Note that one end of the piston 7a of the temperature sensing element 7 attached to the outer surface of the case cover 9 comes into contact with the valve 15, and moves to open the inflow adjustment hole 11a widely as the temperature increases. Note that 17 indicates a seal that rotatably seals between the housing 1 and the sealing case.

The operation of such a configuration will be explained next.

When the engine is operated, the rotor 14 on the driving section side rotates via the pulley 4, and the cooling fan 5 also rotates. Moreover, when the cooling water is at a low temperature, the piston 7a is moved to the right by the temperature sensing element 7, and the valve 15 is moved by the spring 16 into the inflow adjustment hole 11a.
Close. Therefore, the oil in the transmission chamber 13 is moved by the centrifugal force when the rotor 14 rotates through a passage 11c that communicates with the oil reservoir chamber 12 through a dam 18 provided in the oil collecting area on the inside of the casing. A pumping action is performed, the amount of oil in the transmission chamber 13 decreases, and the rotation of the impeller 6 provided on the driven side decreases.

Next, as the temperature of the cooling water increases, the piston 7a is moved to the left by the temperature sensing element 7, and the valve 1
5 opens the inflow adjustment hole 11a against the spring 16. Therefore, the oil in the oil reservoir chamber 12 flows into the transmission chamber 13 through the inflow adjustment hole 11a. Therefore, the amount of oil in the transmission chamber 13 increases, and the rotation of the impeller 6 provided on the driven part side increases, improving the circulation of cooling water.

As described above in detail, the present invention lowers the rotation of the impeller when the cooling water temperature is low to reduce the cooling water flow to an appropriate flow, thereby reducing horsepower consumption. In addition, since there is no overcooling, the engine warms up faster, and combustion efficiency increases by keeping the engine at an appropriate temperature. In this way, the water temperature sensitive system has the advantage of enabling appropriate temperature control.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a conventional water supply control pump, Figure 2
The figure is a sectional view showing an embodiment of the water temperature sensitive water supply control pump of the present invention. 1...Pump housing, 3...Shaft, 4
...Pulley, 5...Cooling fan, 6...Impeller, 7...Temperature sensing element, A...Fluid coupling.

Claims (1)

[Claims] 1. A pulley and a cooling fan connected to the engine are attached to one outer end of the shaft supported by the pump housing, and a rotor on the driving part side of the fluid coupling is attached to the other inner end of the shaft, and the rotor is installed internally. The interior of the sealer housing, which is rotatably supported by the shaft and is rotatably sealed from the housing, is composed of a case on the driven part side and a case cover, and is divided into an oil reservoir chamber and a transmission chamber by a dividing plate. and a temperature sensing element that controls the rotation of the fluid coupling by operating a valve that opens and closes the inflow adjustment hole of the support plate in response to the temperature of the cooling water, and an impeller that circulates the cooling water are attached to the case cover. A water temperature sensitive water supply control pump for an internal combustion engine, characterized by: