Shift by wire transmission system
First Claim
1. A method of controlling a manual vehicle transmission having a plurality of gears using an electronic transmission control unit, comprising the steps of:
- (A) determining a condition when the vehicle is moving;
(B) determining a condition when the transmission is manually placed into a neutral gear;
(C) determining an engine condition when the conditions of steps (A) and (B) exist;
(D) choosing a vehicle acceleration condition when the conditions of steps of (A) and (B) exist; and
(E) automatically engaging one of the plurality of gears based upon the engine condition from step (C) and the vehicle acceleration condition chosen in step (D).
10 Assignments
0 Petitions
Accused Products
Abstract
A shift by wire transmission system enables a driver to manually select a next desired gear and the system completes the shift automatically without requiring the driver to operate the clutch. The system includes an electronic transmission control unit that communicates with an electronic engine control unit to control engine speed during a shift in order to synchronize the speed of an engine shaft and the transmission shaft. The driver manually chooses a gear shift by moving a shift lever to thereby produce electrical signals indicative of the desired change in gears. Multiple or skip shifting is possible along with a method of automatically choosing a default gear in the event that the vehicle transmission is placed in neutral while the vehicle is in motion.
-
Citations
9 Claims
-
1. A method of controlling a manual vehicle transmission having a plurality of gears using an electronic transmission control unit, comprising the steps of:
-
(A) determining a condition when the vehicle is moving; (B) determining a condition when the transmission is manually placed into a neutral gear; (C) determining an engine condition when the conditions of steps (A) and (B) exist; (D) choosing a vehicle acceleration condition when the conditions of steps of (A) and (B) exist; and (E) automatically engaging one of the plurality of gears based upon the engine condition from step (C) and the vehicle acceleration condition chosen in step (D). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method of controlling a manual vehicle transmission having a plurality of gears using an electronic transmission control unit, comprising the steps of:
-
(A) determining a condition when the vehicle is moving; (B) determining a condition when the transmission is in a neutral gear; (C) determining an engine condition by determining a number of engine output shaft rotations per minute when the conditions of the steps (A) and (B) exist; (D) choosing to have the vehicle accelerate from the condition of step (A) when the conditions of steps (A) and (B) exist; and (E) automatically engaging one of the plurality of gears by shifting the transmission into a selected gear that corresponds to an engine condition having a minimum number of engine shaft rotations per minute that is greater than a number of rotations per minute corresponding to a maximum torque value associated with the selected gear.
-
Specification