JPH022448B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circulating water-cooled water pump for an internal combustion engine, and particularly to a device that simultaneously controls a cooling fan and a water pump in response to the temperature of cooling water.

Conventionally, as shown in FIG. 1, in this type of device, a shaft 3 is rotatably attached to a pump housing 1 via a bearing 2.
A cooling fan 6 was attached to the outer end of the engine and driven via a fluid coupling 5 containing a pulley 4 and a temperature sensing element, which was connected to the engine, while an impeller 7 was connected to the inner end. . Therefore, the rotation of the cooling fan 6 is controlled in response to the temperature of the air after passing through a radiator (not shown).
Since the impeller 7 in the pump rotates directly with the pulley 4, if the temperature of the cooling water in the pump is low, that is, even though there is no need to circulate the cooling water, the circulation of the cooling water is disturbed and energy is wasted. It had been. Moreover, it had the disadvantage of hindering engine warm-up. Furthermore, it also had the disadvantage of lowering combustion efficiency.

The present invention solves these conventional problems by simultaneously controlling the rotational speeds of the cooling fan and the impeller using a water temperature sensitive fluid coupling equipped with a temperature sensing element. 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 simultaneous rotation control device 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 a rotational force is applied to the outer end of the shaft 3 from the driving part side to the driven part side due to the viscosity of the fluid. A known fluid coupling A for transmission is attached to the driven part side, and a cooling fan 6 is directly connected to the driven part side. On the other hand, a pulley 4 connected to the engine is attached via a bearing 8 to the drive section side. Further, an impeller 7 for circulating cooling water to operate the pump and a temperature sensing element 9 for operating a piston 9a in response to the temperature of the cooling water are attached to the inner end of the shaft 3, that is, inside the pump housing 1. ing. Note that the piston 9a passes through the shaft 3 to control the rotational speed of the fluid coupling A. Note that the fluid coupling A has an inflow adjustment hole 1 in a sealing device housing consisting of a case 10 and a case cover 11.
The interior of the housing is divided into an oil reservoir chamber 13 and a transmission chamber 14 by a dividing plate 12 having a diameter of 2a. The rotor 15 on the drive side is installed with a small gap for
A pulley 4 is fixed via a bearing 8 between the two. Also, on the oil sump chamber 13 side, there is a supporting plate 1.
A valve 16 supported on two support shafts 12b is provided,
A spring 17 closes and presses the inflow adjustment hole 12a. Note that one end of the piston 9a of the temperature sensing element 9 contacts the valve 16, and as the temperature increases, the inflow adjustment hole 12a is moved to be wide open.

The operation of such a configuration will be explained next.

When the engine operates, the rotor 15 on the drive unit side rotates via the pulley 4. However, when the cooling water is at a low temperature, the piston 9a is moved to the right by the temperature sensing element 9, and the valve 16 closes the inflow adjustment hole 12a by the spring 17. For that purpose, transmission chamber 1
The oil in the oil tank 4 is pumped by the centrifugal force when the rotor 15 rotates through a circulation passage 19 that communicates with the oil sump chamber 13 through a dam 18 installed in a part that collects the oil inside the housing. A pumping action is performed, the amount of oil in the transmission chamber 14 is reduced, and the rotation of the cooling fan 6 and impeller 7 provided on the driven side is reduced.

Next, as the temperature of the cooling water increases, the piston 9a moves to the left due to the temperature sensing element 9, and the valve 16 resists the spring 17 to open the inflow adjustment hole 12a.
Therefore, the oil in the oil reservoir chamber 13 flows into the transmission chamber 14 through the inflow adjustment hole 12a. Therefore, the amount of oil in the transmission chamber 14 increases, and the rotation of the cooling fan 6 and impeller 7 provided on the driven part side increases, blowing more air against the engine and improving the circulation of cooling water.

As described in detail above, the present invention lowers the rotation of the cooling fan and impeller when the cooling water temperature is low to reduce the wind blowing to the engine and the cooling water flow to an appropriate flow, thereby reducing horsepower consumption. In addition, since there is no overcooling, engine warm-up is improved, and combustion efficiency is increased by keeping the engine at an appropriate temperature. As described above, the water temperature sensitive system enables proper temperature control and has the advantage of not requiring a control clutch for a water pump or cooling fan.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a conventional cooling fan control device.
FIG. 2 is a sectional view showing an embodiment of the simultaneous rotation control device of the present invention. 1... Pump housing, 3... Shaft, 4... Pulley, 6... Cooling fan, 7... Impeller, 9...
Temperature sensitive body, A...Fluid coupling.

Claims (1)

[Claims] 1 Attach the sealer housing side as the driven side of the fluid coupling to which the cooling fan is attached to the outer end of the shaft supported by the pump housing, and attach the pulley connected to the engine to the drive side. , an impeller that circulates cooling water through the inner end of the shaft, and a valve that opens and closes an inflow adjustment hole inside the fluid coupling to simultaneously control rotation of the fluid coupling and the rotation of the impeller in response to the temperature of the cooling water. 1. A simultaneous rotation control device for a cooling fan and a water pump in an internal combustion engine that is sensitive to water temperature and is characterized in that the device is configured by attaching a temperature sensitive body connected to a piston that acts on the piston.