OIL CONTROLLER FOR HIGH TEMPERATURE EPUMP APPLICATIONS

摘要

In an electric motor-driven oil pump assembly for use with an engine in a vehicle, such as with an automatic engine-stop system in which an electric motor-driven oil pump is driven by an electric motor for hydraulic pressure supply to a transmission or engine of an automotive vehicle, at least in a stopped state of a mechanical oil pump driven by the engine, a controller for operating the motor for controlling the oil pump is provided in a housing proximal the flowing oil fluid such that the flowing oil fluid maintains the temperature of the controller below a predetermined temperature to avoid failure of the electronic components of the controller.

主权项

1. An electric motor-driven pump assembly for hydraulic pressure fluid supply, the assembly comprising:
an electric motor having a casing; a pump having a pump housing with a first end and a second end and wherein the motor casing is coupled to the first end of the pump housing, the pump including a pump fluid passage connected to the motor for conveying the fluid to the motor; controller housing having a that end coupled to the second end of the pump housing, the controller housing including an inlet passage for receiving the fluid and an outlet passage for conveying the fluid, the inlet passage being connected to the pump fluid passage for conveying the fluid into the pump and through the motor to transfer heat from the motor to the fluid before the fluid flow back into the pump and out of the assembly through the outlet passage of the controller housing, wherein a first portion of the controller housing is located adjacent the inlet and outlet passages to provide heat transfer between the fluid and the first portion; and a controller located in the first portion of the controller housing and electrically connected to the motor for supplying power to the motor to thereby control the speed of the pump and the output of fluid from the pump, wherein heat produced by the controller is transferred to the fluid flowing through the inlet and outlet passages.