Oil pump control system for vehicle

Abstract

An oil pump control system for a vehicle, may include an oil pump configured to supply oil to an engine, an oil pressure control valve regulating oil pressure value of a discharging part in the oil pump, an oil pressure sensor sensing and outputting the oil pressure value of the discharging part in the oil pump, and a controller receiving a signal of the oil pressure value, determining a target oil pressure value of the discharging part in the oil pump in response to information relating to an oil pressure and operation state of the engine among vehicle information inputted from outside, comparing the sensed oil pressure value inputted from the oil pressure sensor with the target oil pressure value, and performing feedback control to drive the oil pressure control valve.

What is claimed is: 
     
         1 . An oil pump control system for a vehicle, comprising:
 an oil pump configured to supply oil to an engine;   an oil pressure control valve regulating oil pressure value of a discharging part in the oil pump;   an oil pressure sensor sensing and outputting the oil pressure value of the discharging part in the oil pump; and   a controller receiving a signal of the oil pressure value, determining a target oil pressure value of the discharging part in the oil pump in response to information relating to an oil pressure and operation state of the engine among vehicle information inputted from outside, comparing the sensed oil pressure value inputted from the oil pressure sensor with the target oil pressure value, and performing feedback control to drive the oil pressure control valve.   
     
     
         2 . The oil pump control system as defined in  claim 1 , wherein the controller comprises a first control module determining the target oil pressure value according to a first target oil pressure map which is set in a preset range in response to speed and fuel amount of the engine among the vehicle information. 
     
     
         3 . The oil pump control system as defined in  claim 2 , wherein the target oil pressure value determined by the first target oil pressure map is corrected by oil temperature and cooling water temperature among the vehicle information. 
     
     
         4 . The oil pump control system as defined in  claim 2 , wherein the controller further comprises:
 a second control module determining the target oil pressure value according to a second target oil pressure map, which is set in response to the speed and the fuel amount of the engine among the vehicle information, in consideration of opening of a piston cylinder cooling jet for supplying oil transferred from the oil pump to a piston of the engine; and   a third control module controlling the piston cylinder cooling jet in response to the speed and the fuel amount of the engine,   wherein an opening signal of the piston cylinder cooling jet is inputted, the controller deactivates the first control module and activates the second and third control modules.   
     
     
         5 . The oil pump control system as defined in  claim 1 , wherein the controller further comprises an engine failure warning module which, when a difference between the target oil pressure value and the sensed oil pressure value approaches a preset failure critical value, outputs a warning signal to the outside as an engine failure. 
     
     
         6 . The oil pump control system as defined in  claim 1 , wherein the feedback control is implemented by proportional integral (PI) control or proportional integral derivative (PID) control.