Downshift acceleration control
First Claim
1. A turbine acceleration control system for a transmission in a vehicle comprising:
- a shift module that determines a downshift type;
an altitude model that determines an altitude of the vehicle;
a turbine speed sensor that determines a speed of a turbine in the transmission; and
a controller that communicates with the shift module, the altitude model, and the turbine speed sensor and determines a desired turbine acceleration based on the downshift type, the altitude, and the speed.
20 Assignments
0 Petitions
Accused Products
Abstract
A turbine acceleration control system for a transmission in a vehicle determines a desired turbine acceleration based on a downshift type and an altitude of the vehicle. The turbine acceleration control system determines a downshift type that results from one of a throttle increase, a manual downshift, or vehicle deceleration. An altitude model determines an altitude of the vehicle. A vehicle controller communicates with one or more lookup tables to determine the desired turbine acceleration based on the downshift type and the altitude. Additionally, current turbine speed and torque converter slip are considered by the controller in determining the desired turbine acceleration.
18 Citations
20 Claims
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1. A turbine acceleration control system for a transmission in a vehicle comprising:
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a shift module that determines a downshift type;
an altitude model that determines an altitude of the vehicle;
a turbine speed sensor that determines a speed of a turbine in the transmission; and
a controller that communicates with the shift module, the altitude model, and the turbine speed sensor and determines a desired turbine acceleration based on the downshift type, the altitude, and the speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A turbine acceleration control method for a transmission in a vehicle comprising:
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determining a downshift type;
determining an altitude of the vehicle;
determining a speed of a turbine in the transmission; and
determining a desired turbine acceleration based on the downshift type, the altitude, and the speed. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification