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AssigneesAGCO Corporation, Phoenix International Corporation
InventorsScott A. Clausen, Adrian G. Kallis
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A method for controlling shifting of a powershift transmission of an agricultural vehicle in accordance with a boost pressure developed by a turbocharger of an engine associated with said vehicle. The turbocharger generates a turbo boost pressure which is indicative of the engine torque being produced by the engine at a given time. The turbo boost pressure is monitored by a sensor which generates a boost pressure signal in accordance with the sensed boost pressure. This signal is then modified in accordance with the sensed engine speed of the vehicle to produce a compensated turbo boost signal. The compensated turbo boost signal is compared against predetermined full-load and no-load turbo boost values to determine the percentage value of full-load boost pressure, and thus the load on the engine, at a given time. The percentage value is then used to help generate an appropriate duty cycle and time value for a pulse-width-modulated drive signal which is used to modulate the on-coming directional clutch into engagement at a desired rate of engagement dependent upon the load being experienced by the vehicle.
A method for electronically controlling shifting of a powershift transmission of an agricultural vehicle based upon a load being experienced by an engine of said vehicle, said transmission having at least one proportionally modulatable directional clutch and said engine having a turbocharger which develops a turbo boost pressure in relation to a torque generated by said engine, said method comprising the steps of:
A method for electronically controlling shifting of a powershift transmission of an agricultural vehicle based upon a load being experienced by said vehicle during said shifting, where said vehicle includes an engine having a turbocharger associated therewith and wherein said turbocharger develops a turbo boost pressure in relation to a torque developed by said engine, said method comprising the steps of:
A method for controlling shifting of a powershift transmission of an agricultural vehicle based upon a load being experienced by an engine of said vehicle, said powershift transmission having at least one proportionally modulatable directional clutch and said engine having a turbo charger wherein said turbo charger develops a turbo boost pressure in relation to an engine torque generated by said engine, and wherein said engine torque is related to said load being experienced by said engine, said method comprising the steps of:
A method for controlling shifting of a powershift transmission of an agricultural vehicle based upon the load being experienced by an engine of said vehicle, said transmission having at least one proportionally modulatable directional clutch and said engine having a turbo charger wherein said turbo charger develops a turbo boost pressure in relation to an engine torque developed by said engine at a given time, said method comprising the steps of:
Dependencies are inferred from the claim text.