Oil pump

Abstract

An oil pump includes a motor including a shaft disposed along a center axis, a rotor rotating around the shaft, a stator disposed to face the rotor, a housing accommodating the rotor and the stator, and a pump. The pump includes a pump rotor rotating together with the shaft, and a pump housing including an accommodating portion that accommodates the pump rotor. The pump housing includes a suction port that suctions in oil, a discharge port that discharges oil, and a pressure sensor that detects hydraulic pressure of oil in a partial flow passage allowing communication between the discharge port and the accommodating portion. The pressure sensor is disposed outside the housing of the motor, and the housing includes a wall that blocks electromagnetic waves.

1 - 13 . (canceled) 
     
     
         14 . An oil pump, comprising:
 a motor including a shaft disposed along a center axis extending in an axial direction, a rotor rotating around the shaft, a stator disposed to face the rotor, and a housing accommodating the rotor and the stator; and   a pump including a pump rotor rotating together with the shaft to suction and discharge oil, and a pump housing including an accommodating portion that accommodates the pump rotor; wherein   the pump housing includes a suction port that suctions in oil, a discharge port that discharges oil, and a pressure sensor that detects hydraulic pressure of oil in a flow passage allowing communication between the discharge port and the accommodating portion;   the pressure sensor is disposed outside the housing of the motor; and   the housing includes a wall that blocks electromagnetic waves.   
     
     
         15 . The oil pump according to  claim 14 , wherein
 the pump is disposed on one side of the motor in an axial direction thereof; and   the pump housing includes a pump body including the accommodating portion that accommodates the pump rotor and further includes a side surface and a bottom surface positioned on another side of the motor in the axial direction, and a pump cover closing an opening that opens at one side of the accommodating portion in the axial direction.   
     
     
         16 . The oil pump according to  claim 15 , wherein
 the pump cover includes a protruding portion which protrudes outward beyond an outer circumference of the motor in a radial direction; and   the pressure sensor is fixed to the protruding portion.   
     
     
         17 . The oil pump according to  claim 16 , wherein
 the protruding portion includes the flow passage allowing communication between the discharge port and the accommodating portion; and   the pressure sensor is connected to the flow passage.   
     
     
         18 . The oil pump according to  claim 17 , wherein the protruding portion further includes a solenoid valve connected to the flow passage. 
     
     
         19 . The oil pump according to  claim 18 , wherein the solenoid valve is fixed to the protruding portion and extends to a side of the motor. 
     
     
         20 . The oil pump according to  claim 19 , wherein
 the pressure sensor includes a sensor electrical line electrically connected to the pressure sensor;   the sensor electrical line includes a sensor side terminal at one end portion thereof;   the solenoid valve includes a valve housing in which a spool is movably accommodated, a drive moving the spool relative to the housing, and a solenoid electrical line including one end portion connected to the drive and another end portion provided with a solenoid side terminal; and   the sensor side terminal and the solenoid side terminal are integrally held via a connector.   
     
     
         21 . The oil pump according to  claim 20 , wherein
 the pressure sensor includes a sensor which detects the hydraulic pressure of the oil, and an electrical line holder which holds the sensor electrical line electrically connected to the sensor; and   the electrical line holder of the pressure sensor and the solenoid valve are disposed adjacent to each other and extend in the axial direction of the motor.   
     
     
         22 . The oil pump according to  claim 18 , wherein the solenoid valve includes an opening and closing portion. 
     
     
         23 . The oil pump according to  claim 22 , wherein
 the discharge port includes a first discharge port and a second discharge port; and   the solenoid valve connects between any one of the first discharge port, the second discharge port, and the accommodating portion via the flow passage.   
     
     
         24 . The oil pump according to  claim 23 , wherein
 the pump is attachable to a control valve that performs supply and discharge control of the oil;   the first discharge port is connectable to a main flow passage which supplies the oil discharged from the first discharge port, to the control valve;   the second discharge port is connectable to an oil pan that stores the oil; and   the solenoid valve connects the accommodating portion and the second discharge port via the flow passage.   
     
     
         25 . The oil pump according to  claim 24 , wherein
 the solenoid valve includes a second suction port through which pressurized oil discharged from the pump is suctioned, and a third discharge port through which the oil is discharged to the oil pan side that stores the pressurized oil;   the pump cover includes the first discharge port, the second discharge port, a first flow passage allowing communication between the first discharge port and the accommodating portion, and a second flow passage allowing communication between the second discharge port and the accommodating portion;   the second flow passage is connected to the second suction port of the solenoid valve; and   the second discharge port of the pump cover is connected to the third discharge port of the solenoid valve.   
     
     
         26 . The oil pump according to  claim 15 , wherein
 the second flow passage extends in a direction orthogonal to the axial direction of the motor, and penetrates from inside to an outer circumferential portion of the pump cover; and   a seal is disposed at an opening end portion of the second flow passage that opens to the outer circumferential portion of the pump cover.