Abstract: An early cylinder identification method and system using pulsewidth encoding are provided for use in a variable camshaft timing equipped engine. The method includes generating multiple signal pulses, each signal pulse having a unique length and being associated with one of the engine cylinders. The method also includes measuring the length of a signal pulse, and identifying the engine cylinder associated with the signal pulse based on the measured length of the signal pulse. A system includes a specially designed sensor wheel and control logic for performing the method.

Abstract: A method of reducing feed gas emissions and improving fuel economy in an internal combustion engine uses a variable cam timing mechanism and an electronically controlled throttle.

Abstract: A method and system are provided for distinguishing a cylinder identification (CID) signal pulse from camshaft timing signal pulses in a variable cam timing (VCT) engine having multiple engine combustion events. The method includes generating multiple signal pulses including a signal pulse which identifies an engine cylinder and a signal pulse for each one of the multiple engine combustion events. The method also includes measuring a first time period between a first signal pulse and a second signal pulse, measuring a second time period between the second signal pulse and a third signal pulse, and determining that the third signal pulse is the cylinder identification signal pulse if a product of the second time period and a scaling factor fails to exceed the first time period. A specially designed VCT/CID signal generator, and an appropriately programmed microprocessor are provided for performing the method.

Abstract: A digital computer controlled air-cycle air conditioning machine for aircraft contains an electrically powered compressor that turns independently of expansion turbine rotation. An electrical generator coupled to the expansion turbine creates additional electrical power during the air expansion portion of the refrigeration cycle. Under control of the computer, that additional electrical power is returned to the electrical supply for re-use with the compressor. The compressor and turbine are manufactured as a unitary assembly. The generator's field windings rotate with the turbine and the generator's armature rotates with the compressor shaft. Voltages generated in the generator's field winding are thereby dependent on the differential speed between turbine and compressor.

Abstract: There is provided a method of constructing a chimney, which includes the steps of providing an inner precast lining composed of interfitting segments stacked vertically, providing a precast concrete outer wall composed of interfitting segments in stacked relationship surrounding the lining but spaced outwardly therefrom to define an interstitial gap, providing longitudinal reinforcing steel bars within the interstitial gap, and pouring in situ concrete into the interstitial gap and allowing the concrete to harden.

Abstract: A multiple contact connector, particularly suitable for attachment to printed circuit boards, is a one piece molded body with snap-in contact. From each side further recesses extend into the body, a further recess on each side of a central recess. Each center recess and its associated side recesses are connected by a transverse slot. The contacts, formed from phosphor bronze or other conducting material, are generally Tee shaped, having a stem positioned in the central recess and laterally extending arms passing through the slots and having enlarged ends which are positioned in the side recesses. The end of the stem is formed into spring contact portions to receive male contacts. The extreme ends of the laterally extending arms are formed into contacts which enter holes in the printed circuit board. A small web at an inner corner of each side recess acts to retain the contact in the body, the laterally extending arms clipping under the webs.

Abstract: A device for terminating tachycardia has an input part responsive to heartbeat signals. A tachycardia rate detector is connected to the input part and is effective to give an output while heartbeat signals occur at a rate characteristic of tachycardia. A gate circuit is connected to be controlled by the output from the tachycardia rate detector and a variable delay pulse circuit is connected to receive as input pulses heartbeat signals from the input part and give output pulses each a predetermined delay after a respective input pulse, the output pulses being applied as input to the gate circuit. An output circuit connected to supply stimulating pulses to the heart, the stimulating pulses being generated in response to gated pulses received from the gate circuit. A blocking circuit is connected to the gate circuit to ensure that output pulses from the gate are inhibited during a pause period following each output pulse.