Transmission calibration tool
First Claim
1. A transmission calibration tool comprising:
- a user interface configured to accept a transmission topology description including a list of gearing components, a list of fixed connections among the gearing components, an input shaft, a turbine shaft, and an output shaft, a list of shift elements, a list of transmission states indicating which shift elements are engaged to establish each state, a list of speed sensors, and a list of torque sensors;
a transmission interface configured to accept input signals from the speed sensors and the torque sensors;
a processor programmed to monitor the input signals during a shift event and to estimate torques exerted by gear elements or shift elements at intervals during the shift event based on the input signals and the topology description; and
a display configured to plot the torques after the shift event.
1 Assignment
0 Petitions
Accused Products
Abstract
A transmission calibration tool automatically generates a detailed gearbox model based on a user input transmission topology description. During transmission calibration, the tool accepts inputs from transmission speed and torque sensors and estimates component torques for each gear element and each shift element. Following a shift or other transmission event, the calibration tool plots the component torques as a function of time, permitting the calibration engineer to better understand what is occurring during the event, and thus reducing the time required for calibration. The calibration tool also adapts several transmission component models and outputs the adapted models to provide insight into actual transmission component behavior.
8 Citations
17 Claims
-
1. A transmission calibration tool comprising:
-
a user interface configured to accept a transmission topology description including a list of gearing components, a list of fixed connections among the gearing components, an input shaft, a turbine shaft, and an output shaft, a list of shift elements, a list of transmission states indicating which shift elements are engaged to establish each state, a list of speed sensors, and a list of torque sensors; a transmission interface configured to accept input signals from the speed sensors and the torque sensors; a processor programmed to monitor the input signals during a shift event and to estimate torques exerted by gear elements or shift elements at intervals during the shift event based on the input signals and the topology description; and a display configured to plot the torques after the shift event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A transmission calibration tool comprising:
-
a user interface configured to accept a transmission topology description; a transmission interface configured to accept input signals from a speed sensor and a torque sensor; a processor programmed to, at intervals during a shift event, estimate a torque exerted by a transmission component based on the input signals and the topology description; and a display configured to plot the torque estimates. - View Dependent Claims (10, 11, 12)
-
-
13. A method comprising:
-
accepting a description of a transmission topology; developing a model, based on the transmission topology, that relates transmission component torques to one or more speed sensor signals and one or more torque sensor signals; during a shift event, estimating transmission component torques based on the model, the speed sensor signals, and the torque sensor signals; and after the shift event, displaying the estimated component torques. - View Dependent Claims (14, 15, 16, 17)
-
Specification