摘要:
A closed-loop control for a cam phase adjustment mechanism includes gain terms that are adaptively adjusted to optimize the rate of response of the control to changes in the desired cam phase. The rate of response of the cam phase adjustment mechanism is sampled under specified operating conditions or during certain repeated engine events that involve a change in the desired cam phase, and the deviation of the measured rate of response from the nominal rate of response is determined and used to adjust the closed-loop control gains for restoring the nominal response.
摘要:
A method of determining the position of a cam phaser determines and stores an adaptively updated base offset corresponding to the phase offset of a camshaft relative to a crankshaft for a reference or default position of a cam phaser. Thereafter, the phaser position is determined relative to the base offset. Individual base offsets are preferably determined for each tooth of a toothed cam wheel, and stored in a non-volatile memory device. During engine operation, the base offsets are subject to diagnostic testing and adaptive updating, and the updated base offsets are stored in the non-volatile memory at engine shut-down.
摘要:
A mobile fulfillment device, system, and method for retrieving at least one article stored in one of a plurality of predetermined storage locations are disclosed. The device, system and method includes a wireless transceiver for communicating with a remote system controller, including transmission of at least one instruction from the remote system controller to provide instruction to the control system, a retriever for retrieving the at least one article in response to instruction received from the control system, a sensor for detecting inventory levels of articles in at least one predetermined storage location, a mobile frame supporting the fulfillment device and at least three wheels coupled to the mobile frame and providing mobility to the fulfillment device based on at least one of the at least three wheels being a lockable wheel.