Method and system for controlling operation of an electric oil pump in a hybrid electric vehicle (HEV)
First Claim
Patent Images
1. A method of controlling operation of an electric oil pump in a hybrid electric vehicle (HEV) with an engine and a transaxle with an electric motor, the method comprising:
- controlling the electric oil pump to operate at a commanded speed when the engine is in an off state; and
determining an operating condition of the HEV and determining the commanded speed based on the operating condition of the HEV;
wherein the commanded speed is further based on a temperature of at least one of the engine and the transaxle.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method is provided for controlling operation of an electric oil pump in a hybrid electric vehicle (HEV). The HEV includes an engine and a transaxle including an electric motor coupled to a traction battery. A commanded speed for the electric oil pump is determined and whether the engine in the HEV is in an off state is determined. When the engine is in the off state, the electric oil pump is controlled to operate at the commanded speed.
31 Citations
10 Claims
-
1. A method of controlling operation of an electric oil pump in a hybrid electric vehicle (HEV) with an engine and a transaxle with an electric motor, the method comprising:
-
controlling the electric oil pump to operate at a commanded speed when the engine is in an off state; and determining an operating condition of the HEV and determining the commanded speed based on the operating condition of the HEV; wherein the commanded speed is further based on a temperature of at least one of the engine and the transaxle. - View Dependent Claims (2, 3, 4)
-
-
5. A method of controlling operation of an electric oil pump in a hybrid electric vehicle (HEV) with an engine and a transaxle with an electric motor, the method comprising:
-
controlling the electric oil pump to operate at a commanded speed when the engine is in an off state; and determining a prior operating mode of the HEV and determining the commanded speed based on the prior operating mode; wherein the commanded speed is further based on a temperature of at least one of the engine and the transaxle. - View Dependent Claims (6, 7)
-
-
8. A method of controlling operation of an electric oil pump in a hybrid electric vehicle (HEV) with an engine and a transaxle with an electric motor, the method comprising:
-
controlling the electric oil pump to operate at a commanded speed when the engine is in an off state; and calculating a power loss in the HEV and determining the commanded speed based on the power loss; wherein the commanded speed is further based on a temperature of at least one of the engine and the transaxle. - View Dependent Claims (9, 10)
-
Specification