Gm Global Technolgoy Operations, Inc.

Delphi Technologies, Inc.

Robert Harold Wind

Daniel Alexander Crawford

Joyce D Carsey

David E Roberts

Diana K Voges

Robert B Gelenius

Michael G Schuplin

David Lynn Ehle

Paul Charles Spagnuolo

A control system and method for controlling position of a device by replacing the combination of a feedforward term, a calibrated step, and an integration term in a control scheme with an adaptive feedforward term. An embodiment is provided including a flow control valve on an internal combustion engine. The invention includes characterizing the flow control valve, and determining an error term, based upon monitored position and commanded input to the flow control valve. The adaptive feedforward term is determined based upon the monitored position, the characterization of the flow control valve, and the error term. The flow control valve is controlled to a position, based upon the adaptive feedforward term and the error term. When an absolute value of a derivative term, i.e. a time-rate change of the monitored position, is less than a preset value, the control system updates the characterization of the flow control valve.

Method and apparatus for adaptively controlling a device to a position

An improved cruise control which produces a desired throttle position that is based in part on a selectively updated integral term. The integral term is only updated when the magnitude of the speed error exceeds a predefined value, thereby eliminating changes in the integral term when the speed error is smaller than the predefined threshold. In other words, the integral term is dynamic and responsive to a current error condition when the speed error magnitude exceeds the threshold, and static when the speed error is within the threshold. In this way, the operational advantages of the integral term are retained while avoiding its disadvantages, and the transition between the static and dynamic states of the integral term are smooth and seamless.

Motor vehicle cruise control with selectively updated integral gain

A circuit for a combustible gas sensor comprising: a bridge circuit having first and second legs; a first node at a first midpoint in the first leg of the bridge circuit; a second node at a second midpoint in the second leg of the bridge circuit; a first temperature responsive resistive sensor element coupled between the first node and a bottom of the bridge circuit and located in a flow of combustible gas; a second temperature responsive resistive sensor element coupled between the bottom of the bridge and ground and located in the flow of combustible gas; and a voltage control circuit coupled to the first and second nodes and to the top of the bridge circuit for maintaining closed loop control of first and second node voltages at the first and second nodes by varying a bridge voltage at the top of the bridge circuit wherein one of the first and second sensor elements includes a catalyst for stimulating reactions of reactive constituents in the flow of combustible gas.

Circuit for a combustible gas sensor

A commutatorless direct current motor drive system that initiates rotation of a permanent magnet rotor from standstill upon the application of supply potential and then sustains rotor rotation by sequentially energizing the polyphase stator phase windings in response to the alternating current potential waveforms induced in the stator phase windings by the magnetic field of the permanent magnet rotor upon rotor rotation.

Commutatorless direct current motor drive system

A valve assembly in an air brake truck system which meets minimum response time specifications required by authorities and the maximum response rate required by the wheel lock control system for efficient operation. The valve assembly varies the effective orifice size between the air supply inlet and the outlet to the relay valve. The high minimum specified rate is provided for a short period of time for initial response and the lower maximum rate for efficient operation is provided for the remainder of the stop. The valve assembly has a timing section and a variable orifice section. An initially effective large orifice area is provided by moving the valve from its rest or low rate position with an initial application of control pressure, and passing control pressure through a timing orifice to counterbalance the initially applied pressure in a desired short period of time, thereby permitting the valve to return to its first position which establishes a smaller effective orifice area through which the supply pressure flows. The valve is balanced by suitable balance ports and areas so that the operating conditions of the variable orifice section do not affect the operation of the timing section.

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Grand Blanc, MI, United States of America

Robert Harold Wind