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US 9,429,082 B2Granted
Method and system for operating an internal combustion engine with multiple torque curves
AssigneeDeere & Company
InventorsBrian Eugene Holthaus, Dick J. Goering
Life of this patent
Estimating the term…
Abstract
A method of operating an internal combustion engine includes the steps of: determining an upper torque curve at which exhaust emissions from the internal combustion engine are acceptable; determining a lower torque curve at which exhaust emissions from the internal combustion engine are acceptable; and operating the internal combustion engine using a command torque curve ranging between the lower torque curve as a lower limit and the upper torque curve as an upper limit.
Claims15
A method of operating a diesel engine, comprising the steps of:
- outputting a torque curve value from a work vehicle controller to an engine controller, said torque curve value dependent upon at least one vehicle control parameter;
- determining with said engine controller at least a portion of a selected command torque curve dependent upon said torque curve value, said command torque curve having a predefined shape and ranging at a known distance between a low power lower torque curve as a lower limit and a high power upper torque curve as an upper limit;
- outputting from said engine controller at least one engine control parameter associated with said command torque curve;
- and
- operating said diesel engine using said at least one engine control parameter.
2 more elements
A control system for operation of a diesel engine, comprising:
- a work vehicle controller outputting a selected torque curve value dependent upon at least one vehicle control parameter;
- and
- an engine controller receiving said torque curve value and determining at least a portion of a command torque curve dependent upon said torque curve value, said command torque curve having a predefined shape and ranging at a known distance between a low power lower torque curve as a lower limit and a high power upper torque curve as an upper limit, said engine controller outputting at least one engine control parameter associated with said command torque curve, and said engine controller operating said diesel engine using said at least one engine control parameter.
Dependencies are inferred from the claim text.