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US 8,285,463 B2Granted
Method and system for calibrating a pressure sensor for an automatic transmission
AssigneeGM Global Technology Operations LLC
InventorsRobert L. Moses, Ronald F. Lochocki, Jr.
Life of this patent
Estimating the term…
Abstract
A method and control system for operating a transmission includes a transmission control module determining a transmission sensor signal and a transmission pressure sensor offset prior to starting a vehicle engine and an engine start initiator starting the vehicle engine. The transmission control module controls a transmission function in response the transmission pressure sensor offset and the pressure sensor signal.
Claims19
A method comprising:
- prior to starting an engine of a vehicle:
- receiving a pressure measured using a transmission pressure sensor;
- and
- determining a pressure offset for the pressure based on the pressure measured prior to the starting of the engine;
- starting the engine after the determining of the pressure offset;
- and
- after the starting of the engine:
- receiving the pressure measured using the transmission pressure sensor;
- generating a corrected pressure based on the pressure measured after the starting of the engine and the pressure offset;
- and
- controlling a solenoid valve of a transmission based on the corrected pressure.
8 more elements
A control system comprising:
- a transmission control module that, prior to starting of an engine of a vehicle:
- receives a pressure measured using a transmission pressure sensor;
- and
- determines a pressure offset for the pressure based on the pressure measured prior to the starting of the engine;
- and
- an engine start initiator that starts the engine after the determination of the pressure offset;
- wherein, after the starting of the engine, the transmission control module:
- receives the pressure measured using the transmission pressure sensor;
- generates a corrected pressure based on the pressure measured after the starting of the engine and the pressure offset;
- and
- controls a solenoid valve of a transmission based on the corrected pressure.
8 more elements
Dependencies are inferred from the claim text.