Clutch water pump, control system thereof, and control method thereof

Abstract

A clutch water pump may include a pulley, a brake pad attached on an interior surface of the clutch compartment of the pulley, a clutch disk disposed corresponding to the brake pad in the clutch compartment, a hub rotatably mounted into the penetrating hole and coupled to the clutch disk through a plurality of spring pins, the plurality of spring pins connecting slidably the clutch disk to the hub, a magnetic actuator fixed to the hub and disposed to the clutch disk to selectively move the clutch disk toward or away from the brake pad, and a main shaft, one end of which is fixed to the center of the hub and the other end of which is fixed to an impeller. Furthermore, a method of controlling the clutch water pump according to the engine rotation speed, the coolant temperature, and a condition of the coolant temperature sensor is provided.

1 . A clutch water pump, comprising:
 a pulley in which a penetration hole is formed at a center portion thereof and a clutch compartment is formed on a rear side surface thereof;   a brake pad that is attached on an interior surface of the clutch compartment of the pulley;   a clutch disk that is disposed corresponding to the brake pad in the clutch compartment;   a hub that is rotatably mounted into the penetrating hole and is coupled to the clutch disk through a plurality of spring pins, the plurality of spring pins connecting slidably the clutch disk to the hub;   a magnetic actuator fixed to the hub and disposed to the clutch disk to selectively move the clutch disk toward or away from the brake pad; and   a main shaft, one end of which is fixed to the center of the hub and the other end of which is fixed to an impeller.   
     
     
         2 . The clutch water pump of  claim 1 , wherein the plurality of spring pins are formed on the external circumference of the hub to elastically support the clutch disk toward the brake pad. 
     
     
         3 . The clutch water pump of  claim 1 , wherein the magnetic actuator includes a field coil that is disposed corresponding to the clutch disk and covered by a coil case and a cover. 
     
     
         4 . The clutch water pump of  claim 3 , wherein the filed coil is magnetized by an external control signal to generate magnetic force to the clutch disk so as to connect or disconnect the clutch disk to or from the brake pad. 
     
     
         5 . The clutch water pump of  claim 3 , wherein the clutch disk is connected to the brake pad to supply rotation torque of the pulley to the impeller so as to pump a coolant in a case that the field coil is not magnetized. 
     
     
         6 . The clutch water pump of  claim 3 , wherein the clutch disk is disconnected from the brake pad in a case that the field coil is magnetized. 
     
     
         7 . A control method of controlling the clutch water pump defined in  claim 1 , comprising:
 operating the clutch water pump if engine rotation speed exceeds a predetermined standard value, if coolant temperature exceeds a first predetermined value, if a heater switch is on, or if a coolant temperature sensor is out of order,   operating the clutch water pump in a first operating condition if the engine rotation speed is lower than the predetermined standard value and the coolant temperature ranges from the first predetermined value to a second predetermined value, wherein the first predetermined value is higher than the second predetermined value,   operating the clutch water pump in a second operating condition if the engine rotation speed is lower than the predetermined standard value and the coolant temperature ranges from the second predetermined value to a third predetermined value, wherein the second predetermined value is higher than the third predetermined value, and   operating the water pump in a third operating condition if the engine rotation speed is lower than the predetermined standard value and the coolant temperature is lower than the third predetermined value,   wherein the coolant temperature sensor is configured to detect the coolant temperature supplied to the clutch water pump.   
     
     
         8 . A control device of a clutch water pump, comprising:
 an engine rotation speed detecting portion that detects engine rotation speed;   a water temperature detecting portion that detects temperature of a coolant;   a switch that detects an on/off condition of a heater switch;   a control portion that operates the clutch water pump depending on the coolant temperature and the on/off condition of the heater switch; and   a clutch that generates magnetic force to control the operation of the clutch water pump depending on control signal of the control portion.   
     
     
         9 . The control device of  claim 8 , wherein the water temperature detecting portion is disposed at an outlet of the coolant in a cylinder block. 
     
     
         10 . The control device of  claim 8 , wherein if the engine rotation speed exceeds a predetermined standard value, if the coolant temperature exceeds a first predetermined value, if the heater switch is on, or if the coolant temperature sensor is out of order, the control portion operates the clutch water pump. 
     
     
         11 . The control device of  claim 8 , wherein if the engine rotation speed is lower than a predetermined standard value and the coolant temperature ranges from a first predetermined value to a second predetermined value, the control portion operates the clutch water pump in a first operating condition, the first predetermined value being higher than the second predetermined value. 
     
     
         12 . The control device of  claim 8 , wherein if the engine rotation speed is lower than a predetermined standard value and the coolant temperature ranges from a second predetermined value to a third predetermined value, the control portion operates the clutch water pump in a second operating condition, the second predetermined value being higher than the third predetermined value. 
     
     
         13 . The control device of  claim 8 , wherein if the engine rotation speed is lower than a predetermined standard value and the coolant temperature is lower than a third predetermined value, the control portion operates the clutch water pump in a third operating condition. 
     
     
         14 . A control method of controlling a clutch water pump, comprising:
 detecting an engine driving condition, a coolant temperature, an operating condition of a heater switch, and a will of a driver; and   analyzing the detected information, and operating the clutch water pump by controlling an electric clutch depending on an engine rotation speed, the coolant temperature, and the operating condition of the heater switch.   
     
     
         15 . The control method of  claim 14 , wherein if the engine rotation speed exceeds a predetermined standard value, the electric clutch is turned off to operate the clutch water pump. 
     
     
         16 . The control method of  claim 14 , wherein the electric clutch is turned off to operate the clutch water pump so as to raise the temperature of the interior while the heater switch is turned on. 
     
     
         17 . The control method of  claim 14 , wherein if a fault of a coolant temperature sensor that detects the coolant temperature is recognized, the electric clutch is turned off to operate the clutch water pump in a limp-home mode. 
     
     
         18 . The control method of  claim 14 , wherein if the engine rotation speed is lower than a predetermined standard value and the coolant temperature ranges from a first predetermined value to a second predetermined value that is lower than the first predetermined value, the electric clutch is operated in a first condition to operate the clutch water pump. 
     
     
         19 . The control method of  claim 14 , wherein if the engine rotation speed is lower than a predetermined standard value and the coolant temperature ranges from a second predetermined value to a third predetermined value that is lower than the second predetermined value, the electric clutch is operated in a second condition to operate the clutch water pump. 
     
     
         20 . The control method of  claim 14 , wherein if the engine rotation speed is lower than a predetermined standard value and the coolant temperature is lower than a third predetermined value, the electric clutch is operated in a third condition to operate the clutch water pump.