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AssigneeFord Global Technologies, LLC
InventorsRajiva Prakash, Vincent Frank Amantangelo
Estimating the term…
A system and method are provided for managing faults in position sensing device and shift device. The faults in the sensing device are the unwarranted code change, power loss fault, and the channel fault. The faults considered in the shifting device correspond to those that either turn it on without a command from the controller or those that don't allow it to turn on despite of a command from the controller. The limited operation actions under these fault condition constitute disabling shifting, enabling shifting until a main-stop is reached, railing on two-wheel side, or a combination of these. Moreover, there are several alternatives in reset mechanism, namely, maintaining the limited operation mode until service, reset upon ignition key going from OFF to RUN, key going from START to RUN, or a simple change in Mode Select Switch after the limited operation action of the controller, etc. Auto-reset in the conditions of auto-fault recovery as in the transient fault conditions are also included.
1) A shifting assembly comprising:
16) A vehicle comprising a four wheel drive shifting mechanism which is selectively moved to several positions and which is susceptible to at least one fault;
19) A method for detecting and responding to certain events within an electronic four wheel drive system of the type having a selectively positionable motor which is coupled to an electrically powered position sensor, said sensor being adapted to sense the position of said motor and to communicate said position to a controller, said method comprising the steps of:
Dependencies are inferred from the claim text.