Hybrid powertrain auto start control system with engine pulse cancellation
AssigneeGM Global Technology Operations LLC
InventorsBirendra P. Bhattarai, Bon Ho Bae, Leah Dunbar
Life of this patent
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Abstract
A control system for a hybrid powertrain includes an engine start detector that detects when an engine of the hybrid powertrain is activated via an electric motor during an auto start. An electric motor speed monitor determines a first speed of the electric motor for a first time and a second speed of the electric motor for a second time after detection of the engine in an active state. A control module determines a rate of change in speed of the electric motor based on the first speed and the second speed. The control module adjusts torque output of the electric motor during startup of the engine and based on the rate of change in speed.
Claims18
A control system for a hybrid powertrain comprising:
- an engine start detector that detects when an engine of said hybrid powertrain is activated via an electric motor during an auto start;
- an electric motor speed monitor that determines a first speed of said electric motor for a first time and a second speed of said electric motor for a second time after detection of said engine in an active state;
- and
- a control module that determines a first rate of change in speed of said electric motor based on said first speed and said second speed,
- wherein said control module adjusts torque output of said electric motor during startup of said engine and based on said first rate of change in speed.
A hybrid powertrain system of a vehicle comprising:
- an engine;
- an electric motor that applies a torque on said engine during an auto start;
- an engine start detector that detects when said engine is activated via said electric motor;
- a sensor generates a speed signal that indicates a speed of at least one of said electric motor and said engine;
- and
- a control module that determines a rate of change in speed of at least one of said electric motor and said engine based on said engine start detector detecting said engine in an active state and said speed signal,
- wherein said control module adjusts torque output of said electric motor during startup of said engine and based on said rate of change in speed.
Dependencies are inferred from the claim text.