Electronic PRNODDL display system
AssigneeChrysler Corporation
InventorGerald L. Holbrook
Life of this patent
Estimating the term…
Abstract
The present invention provides an apparatus for indicating transmission operating mode based upon actual operating mode as determined by the transmission controller. The apparatus receives input signals from the PRNODDL switch of the electronically controlled automatic transmission in addition to pressure switch and speed data to determine and confirm transmission operating mode. The signals are processed by the automatic transmission controller and communicated to the instrument cluster for displaying transmission operating mode.
Claims20
In an electronically controlled automatic transmission, a system for displaying the transmission operating mode comprising;
- means for detecting the hydraulic operating modes of the transmission;
- means for detecting the currently selected shift position of the transmission;
- means for detecting the transmission input and output speeds;
- and
- processing means for producing a transmission first operating mode signal in response to the transmission shift position when the transmission is in a first operating mode, and for producing a second transmission operating mode signal in response to the hydraulic operating mode and the transmission input and output speeds when the transmission is in a second operating mode.
A system for determining a transmission operating mode of an automatic transmission, said system comprising:
- a manual valve lever position sensor, said manual valve lever position sensor sensing transmission positions of a manual gear select lever, said position sensor providing predetermined coded signals indicative of the transmission positions and predetermined coded signals indicative of transition positions when the gear select lever is between the transmission positions;
- a plurality of pressure switches, said pressure switches identifying hydraulic operating modes of the transmission, said pressure switches providing signals of the transmission operating modes;
- and
- a transmission controller responsive to the coded signals from the position sensor and the transmission operating mode signals from the pressure switches, said transmission controller operable to determine a transmission operating mode when the position sensor provides a transition code.
A system for determining a transmission operating mode of an automatic transmission, said system comprising:
- a manual valve lever position sensor, said manual valve lever position sensor sensing transmission positions of a manual gear select lever, said position sensor providing predetermined coded signals indicative of the transmission positions and predetermined coded signals indicative of transition positions when the gear select lever is between the transmission positions;
- a plurality of pressure switches, said pressure switches identifying hydraulic operating modes of the transmission, said pressure switches providing signals of the transmission operating modes;
- a transmission input speed sensor and a transmission output speed sensor that detect the transmission input and output speeds;
- and
- a transmission controller responsive to each of the coded signals from the position sensor, the transmission operating mode signals from the pressure switches, and the transmission input and output speeds from the transmission input and output speed sensors, said transmission controller generating a first transmission operating mode signal in response to the position sensor when the transmission is in a first operating mode, and generating a second transmission operating mode signal in response to the hydraulic operating mode and the transmission input and output speeds when the transmission is in a second operating mode.
Dependencies are inferred from the claim text.