Acceleration based mode switch
AssigneeAllison Transmission, Inc.
InventorsJeffrey E. Shultz, Jared S. Shattuck
Life of this patent
Estimating the term…
Abstract
The present invention provides a method of selecting and implementing a shift schedule for a transmission in a vehicle that includes an output speed sensor and a controller. The method includes measuring output speed with the output speed sensor and comparing the measured output speed to an output speed threshold. The controller receives throttle percentage and compares the throttle percentage to a throttle threshold. The method also includes calculating output acceleration and transmission gear ratio with the controller. The shift schedule is selected based on the measured output speed, calculated output acceleration, calculated transmission gear ratio, and throttle percentage.
Claims54
A method of selecting a shift schedule for a transmission in a vehicle, the transmission including an output speed sensor and a controller, the method comprising:
- measuring output speed with the output speed sensor and comparing the measured output speed to an output speed threshold;
- receiving throttle percentage with the controller and comparing the throttle percentage to a throttle threshold;
- calculating output acceleration and transmission gear ratio with the controller;
- and
- selecting and implementing a shift schedule based on the output speed, output acceleration, transmission gear ratio, and throttle percentage.
A method of selecting an economy shift schedule or performance shift schedule for a transmission, the transmission including a speed sensor and a controller, the method comprising:
- using the speed sensor to measure output speed and the controller to calculate output acceleration;
- receiving throttle percentage by the controller and comparing the throttle percentage to a throttle threshold;
- and
- selecting an economy shift schedule or performance shift schedule.
A method of enabling acceleration based software based on transmission data for a transmission in a vehicle, the transmission including an input speed sensor, an output speed sensor, and a controller, the method comprising:
- using the output speed sensor to determine if the vehicle is moving;
- using the input speed sensor to determine if the vehicle is operating below a defined engine speed;
- using the controller to determine if an engine in the vehicle is generating power;
- and
- determining whether to enable the acceleration based software.
Dependencies are inferred from the claim text.