Method of adjusting an engine load signal used by a transmission controller
AssigneeDeere & Company
InventorTrent Lynn Goodnight
Life of this patent
Estimating the term…
Abstract
A vehicle transmission controller responds of a load signal representing a load on the vehicle engine. The load signal is automatically and repeatedly adjusted as a function of an operational status of the auxiliary vehicle function, and the load signal is automatically adjusted during a shift of the transmission.
Claims14
In a vehicle having an engine, a transmission driven by the engine and shiftable among a plurality of gears in response to hydraulic pressure applied to shift control clutches, an auxiliary function driven by the engine, a transmission controller for controlling pressure applied to the shift control clutches as a function of a load signal representing a load on the engine, a method of adjusting the load signal to which the transmission controller responds, comprising:
- automatically and repeatedly determining a variable load factor value as a function of an operational status of the auxiliary function;
- and
- adjusting the load signal used by the transmission controller as a function of the variable load factor value;
- controlling modification of the load factor value as a function of previous modifications of the load factor value.
In a vehicle having an engine, a transmission driven by the engine and shiftable among a plurality of gears, an auxiliary function driven by the engine, a transmission controller for controlling shifts as a function of a load signal representing a load on the engine, a method of adjusting the load signal to which the transmission controller responds, comprising:
- determining a variable load factor value as a function of an operational status of the auxiliary function;
- determining a speed ratio value representing a ratio of engine speed to transmission output speed;
- modifying the load factor value as a function of the speed ratio value;
- and
- adjusting the load signal used by the transmission controller as a function of the variable load factor value.
Dependencies are inferred from the claim text.