System and Method for Controlling Transmission Shift Points Based on Vehicle Weight
AssigneeCummins Inc.
InventorSteven M. Bellinger
Life of this patent
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Abstract
A system and method of controlling shift points of a transmission coupled to an internal combustion engine by modifying at least one transmission shift point schedule may comprise determining a weight of a vehicle carrying the engine and the transmission, modifying the at least one transmission shift point schedule as a function of the weight of the vehicle, and controlling automatic shifting between two or more gear ratios of the transmission in accordance with the modified at least one transmission shift point schedule.
Claims38
A system for controlling shift points of a transmission carried by a motor vehicle, comprising:
- means for determining a weight of the vehicle,
- a memory unit having stored therein at least one transmission shift point schedule and having stored therein at least one set of instructions, and
- a control circuit configured to execute the at least one set of instructions to modify the at least one transmission shift point schedule as a function of the weight of the vehicle and to control automatic shifting between two or more gear ratios of the transmission in accordance with the modified at least one transmission shift point schedule.
A system for controlling shift points of a transmission coupled to an internal combustion engine and having a number of automatically selectable gear ratios, the system comprising:
- a first control circuit configured to control operation of the engine and to determine a weight of a motor vehicle carrying the engine and the transmission,
- a memory unit having stored therein at least one transmission shift point schedule and at least one set of instructions, and
- a second control circuit configured to receive from the first control circuit the weight of the vehicle and to execute the at least one set of instructions to modify the at least one transmission shift point schedule as a function of the weight of the vehicle and to control shifting between two or more of the automatically selectable gear ratios in accordance with the modified at least one transmission shift point schedule.
A method of controlling shift points of a transmission coupled to an internal combustion engine by modifying at least one transmission shift point schedule, the transmission having a number of automatically selectable gear ratios, the method comprising:
- determining a weight of a vehicle carrying the engine and the transmission,
- modifying the at least one transmission shift point schedule as a function of the weight of the vehicle, and
- controlling automatic shifting between two or more gear ratios of the transmission in accordance with the modified at least one transmission shift point schedule.
Dependencies are inferred from the claim text.