Hanon Systems

Magna Powertrain Inc

Manmohan Sehmby

Matthew Williamson

Cezar Tanasuca

Karthikeyan Ganesan

Harpreet Baraich

A low profile electric pump arrangement having a motor housing connected to a pump element of a transmission for a vehicle. An inverter housing connected to the motor housing and has a where an electronics control unit (ECU) connects through the inverter housing to selectively supply power to the motor within the motor housing. The recess and the ECU are covered and sealed off from the elements by a plastic cover. In order to obtain a low profile of the electric pump arrangement so it can fit within a desired packaging line on a transmission casing a metal bracket is over molded into the plastic cover. The metal bracket has at least one exposed surface that engages the inverter housing to hold the plastic cover onto the inverter housing in a position so that the plastic cover covers and seals the ECU and recess at the second side of the inverter housing.

Cover retention

A variable capacity vane pump () is provided having a pump control ring () that is moveable to alter the capacity of the pump (). A control chamber () is formed between the pump casing () and the control ring (). The control chamber () is operable to receive pressurized fluid to create a force to move the control ring () to reduce the volumetric capacity of the pump (). A primary return spring () acts between the control ring () and the casing () to bias the control ring () towards a position of maximum volumetric capacity. A shaft is coupled at one end to the control ring and a second end of the shaft is positioned a predetermined distance from the casing (). A secondary return spring () is mounted about the shaft and is configured to engage the control ring () after the control ring () has moved a predetermined amount. The secondary return spring () biases the control ring () towards a position of maximum volumetric capacity. The secondary return spring () acts against the force of the control chamber () to establish a second equilibrium pressure.

Growing community of inventors

Brampton, Canada

Manmohan Sehmby