KR19990048598A - Water pump - Google Patents

Abstract

In the present invention, since the water pump is continuously driven from the beginning of the engine operation in the general water-cooled cooling device, the time until the completion of the warm-up is long, and thus, the air pollution becomes severe. Therefore, power is supplied from the crankshaft of the engine. The driving unit 50 which transfers to the impeller 40 to drive the impeller 40 is a body 51 forming an axis of the impeller 40, and is located inside the body 51 and integral with the body 51. The chamber 53 is rotated and the expansion agent 53 'is enclosed therein, the return spring 55 is extrapolated to the chamber 53 to the elastic chamber 53, and integrally formed with the chamber 53 Spring retainer 56 supporting the return spring 55, one end of which is fixed to the body 51 and the other end of which is positioned inside the chamber 53 so that the expander 53 'is expanded. Piston 54 for moving 53 and yen It is composed of a bearing 57 fixed to the jeans and extrapolated so that the body 51 can be rotated, and a clutch mechanism 59 installed on the shaft of the chamber 53 and the pump pulley 52 to control power transmission. The present invention relates to a water pump which does not circulate the cooling water at the start of the startup, thereby increasing the warm-up speed, thereby reducing the fast idle region, improving fuel economy, and activating the catalyst device early to reduce air pollution.

Description

Water pump

The present invention relates to a water pump that circulates coolant to prevent overheating of the engine. In particular, the present invention relates to a new type of water pump that can shorten the warm-up time of the engine by not operating until the temperature of the coolant reaches a certain level. It is about.

In the water-cooled cooling device of the engine, as shown in FIG. 1, the water pump 13 supplies coolant to the water jacket 11 on the cylinder side to cool the engine 10, and the hot coolant is radiated to the radiator 15. The heat pump circulates to dissipate heat, and the cooling water cooled by the heat dissipation is supplied to the water jacket 11 again to circulate the water pump. In addition, the water pump 13 is provided with a cooling fan 14 to improve the heat dissipation effect by forcing the radiator 15 to contact the outside air.

At this time, a water temperature regulator 16 is provided between the water jacket 11 and the radiator 15 so as to change the circulation path of the cooling water in accordance with the cooling water temperature.

That is, since the temperature of the cooling water is low at the initial stage of the engine 10, the water temperature regulator 16 blocks the channel of the radiator 15 side, and the cooling water is circulated to the water jacket 11 through the bypass passage 17. This allows the temperature of the engine 10 to rise quickly. When the cooling water temperature rises, the water temperature controller 16 opens the passage on the radiator 15 side according to the temperature so that the cooling water does not overheat.

However, the water-cooled cooling device configured as described above has a problem that the time until the warm-up is completed because the water pump is continuously driven from the initial operation of the engine, thereby causing a serious air pollution.

That is, the engine sets the fast idle region to increase the injection amount of fuel and perform high rotation until the warm-up at the initial start-up is to shorten the warm-up time. At this time, the air-fuel ratio is rich and not only incomplete combustion but also the function of the catalyst is not activated to increase the emission of harmful gases.

The present invention has been made to solve the above-mentioned problems of the prior art, by installing a clutch between the pulley and the impeller shaft and to clamp the clutch according to the coolant temperature, to shorten the engine warm-up time and reduce the emissions of harmful gases The purpose is to provide a new type of water pump.

1 is a cooling system diagram showing a water-cooled cooling device of a typical engine,

2 is a block diagram showing a driving unit of the water pump according to the present invention.

<Explanation of symbols for main parts of the drawings>

40 impeller 50 driving part

51: Body 52: Pump Pulley

53 chamber 53 'expanding agent (wax)

54: piston 55: return spring

56: spring retainer 57: bearing

58: connecting string 59: clutch mechanism

59a: first helical gear 59b: second helical gear

The present invention has been made in order to achieve the above object, the inlet and outlet is formed in the housing, the impeller is located inside the housing and pressurized the coolant using the centrifugal force of the rotation, and the power from the crankshaft of the engine A water pump comprising a drive unit for driving the impeller by transferring to the impeller, wherein the drive unit is a chamber formed in the axis of the impeller, the chamber is located inside the body is integrally rotated with the body and the expansion agent is sealed therein A return spring that is extrapolated to the chamber to repel the chamber, a spring retainer integrally formed with the chamber to support the return spring, and one end fixed to the body and the other end located inside the chamber to expand the expansion agent. A piston for moving the chamber when inflated and fixed to the engine and Is de-installed on the axis of the extrapolated so as to be rotational bearing and the pump chamber and the pulley is characterized in that a clutch mechanism configured to regulate the power transmission.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the water pump according to the present invention includes a housing (not shown) in which an inlet and an outlet are formed, an impeller 40 that is located inside the housing and pumps the coolant using centrifugal force due to rotation. The driving unit 50 transmits power from the crankshaft of the engine to the impeller 40 to drive the impeller 40.

The drive unit 50 is a body 51 forming the shaft of the impeller 40, and is located inside the body 51 is rotated integrally with the body 51 and the expansion agent 53 'is sealed therein A chamber 53, a return spring 55 that is extrapolated to the chamber 53 to eject the chamber 53, and a spring retainer integrally formed with the chamber 53 to support the return spring 55 ( 56, a piston 54, one end of which is fixed to the body 51 and the other end of which is located inside the chamber 53, moves the chamber 53 when the expanding agent 53 'is expanded, and the engine And a clutch 57 which is fixed to the shaft and is extrapolated so that the body 51 can be rotated, and a clutch mechanism 59 installed on the shaft of the chamber 53 and the pump pulley 52 to intermittent power transmission. .

Here, wax is used as the inflating agent 53 'enclosed in the chamber 53, and the clutch mechanism 59 includes the first helical gear 59a formed in the chamber 53 and the pump pulley 52. And a second helical gear 59b formed on the shaft of the head. At this time, the reason for using the helical gear is to prevent the connection shock and the noise during the connection from being greatly generated. Here, the first helical gear 59a and the second helical gear 59b are formed to be inscribed with each other. Of course, the first helical gear 59a and the second helical gear 59b may be externally formed.

In addition, the body 51 and the chamber 53 connect the piston 54 and the chamber 53 with a connection length 58 of a predetermined length so that the body 51 and the chamber 53 may be integrally rotated. At this time, the connecting string 58 has a length as long as the allowable distance of the chamber 53. In addition, spline coupling of the body 51 and the chamber 53 to obtain the same effect, or one end located inside the chamber 53 of the piston 54 is splined on the inner circumferential surface of the chamber 53. May be combined.

In the water pump of the present invention configured as described above, when the cooling water temperature is low, the warming up is completed without circulating the cooling water, and when the cooling water temperature is increased, the power of the pump pulley is transmitted to the impeller to circulate the cooling water.

Since the wax 53 'in the chamber 53 is in a contracted state before starting the engine, the first helical gear 59a and the second helical gear 59b are separated. When the engine is started, the pump pulley 52 rotated by the crankshaft rotates, but the impeller 40 does not rotate because the first helical gear 59a is in a state separated from the second helical gear 59b. Thus, the coolant is not circulated and the coolant temperature is thus rapidly increased.

When the cooling water temperature rises as the engine warms up, the wax 53 'in the chamber 53 melts and expands. At this time, since the piston 54 is fixed to the body, the chamber 53 is moved toward the pump pulley 52 while compressing the return spring 55. If the cooling water continues to expand, the first helical gear 59a and the second helical gear 59b are engaged with each other, so that the power of the pump pulley 52 is transmitted to the body 51.

Therefore, since the impeller 40 receiving the power of the pump pulley 52 is rotated, and the coolant introduced through the inlet of the housing (not shown) exits the outlet according to the rotation of the impeller 40, the coolant is the engine. Cycles through the water jacket. In addition, the wax in the thermostat (not shown) also expands, opening the coolant passages to the radiator (not shown), which causes the coolant to circulate between the engine and the radiator.

As described above, the water pump according to the present invention does not circulate the cooling water at the initial stage of startup, thereby increasing the warm-up speed, thereby reducing the fast idle region, improving fuel economy, and enabling the catalytic device to be activated early, thereby reducing air pollution.

Claims (8)

Water including a housing having an inlet and outlet formed therein, an impeller for conveying the coolant using centrifugal force due to rotation, and a driving unit for transmitting power from the crankshaft of the engine to the impeller to drive the impeller. In the pump, The drive unit includes a body forming an axis of the impeller, a chamber positioned inside the body and integrally rotated with the body and encapsulated with an expanding agent therein, a return spring extrapolated to the chamber to eject the chamber, and the chamber; A spring retainer integrally formed to support the return spring, one end of which is fixed to the body and the other end of which is located inside the chamber, and a piston for moving the chamber when the inflator is expanded, fixed to the engine and the body being A water pump, comprising: a clutch that is extrapolated so as to be rotated, and a clutch mechanism installed on the shaft of the chamber and the pump pulley to intermittent power transmission. The method of claim 1, And a swelling agent enclosed in the chamber is wax. The method of claim 1, And said clutch mechanism comprises a first helical gear formed in said chamber and a second helical gear formed on an axis of said pump pulley. The method of claim 3, wherein The water pump, characterized in that the first helical gear and the second helical gear is formed to be inscribed with each other. The method of claim 3, wherein The water pump, characterized in that the first helical gear and the second helical gear are formed to be external to each other. The method of claim 1, One end of the chamber and the piston is connected by a connecting string so that the body and the chamber can be integrally rotated, the movement distance of the chamber is determined by the length of the connecting string. The method of claim 1, And said body and said chamber are splined to be integrally rotated. The method of claim 1, The body and the chamber is a water pump, characterized in that one end located inside the chamber of the piston is splined to the inner circumferential surface of the chamber so as to be integrally rotated.