Abstract: A system and method for stopping an internal combustion engine. According to one aspect of the disclosure, a shutdown sequence of the engine includes retarding ignition timing relative to ignition timing prior to initiation of the shutdown sequence, and then advancing ignition timing relative to ignition timing prior to initiation of the shutdown sequence.

Abstract: A method for a vehicle traveling on the road having an engine with adjustable valve operation is described. The method includes performing a valve cleaning operation for reducing deposits on a valve of the engine; and at least during said operation, adjusting valve timing of at least a valve of the engine and a fuel injection amount to increase an amount of fuel pushed back from a cylinder past the valve with deposits and then re-inducted through the valve with deposits.

Abstract: A method for a vehicle traveling on the road having an engine with adjustable valve operation is described. The method includes performing a valve cleaning operation for reducing deposits on a valve of the engine; and at least during said operation, adjusting valve timing of at least a valve of the engine and a fuel injection amount to increase an amount of fuel pushed back from a cylinder past the valve with deposits and then re-inducted through the valve with deposits.

Abstract: A vehicle system is disclosed. The system include a engine capable of disabling and enabling at least one cylinder; a motor coupled to said engine capable of absorbing torque and providing torque; and a controller for disabling and enabling said at least one cylinder, and during at least one of disabling and enabling, varying torque of said motor to compensate for transient changes in engine output torque caused by said one of disabling and enabling.

Abstract: In one example, a system for a vehicle traveling on the road is described. The system includes a first cylinder; a second cylinder; a linear exhaust gas sensor coupled exclusively to said first cylinder; a switching exhaust gas sensor coupled exclusively to said second cylinder; and a controller configured to operate in a first mode with both said first and second cylinders carrying out lean combustion, where fuel injection amounts to each of said first and second cylinder are adjusted based on said linear sensor; said controller further configured to operate in a second mode with both said first and second cylinders carrying out combustion about stoichiometry, where fuel injection amounts to at least one of said first and second cylinder are adjusted based on said switching sensor.

Abstract: A system for a vehicle traveling on the road is shown. The system includes a first cylinder; a second cylinder; a linear exhaust gas sensor coupled exclusively to said first cylinder; a switching exhaust gas sensor coupled exclusively to said second cylinder; and a controller configured to perform a decontamination cycle where one of said first cylinder and second cylinder produces a reductant rich exhaust and the other of said first and said second cylinder produces an oxygen rich exhaust, where an air-fuel ratio of one of said first and second cylinder is adjusted in response to said linear sensor.

Abstract: Systems and methods for detecting degradation of a sensor in a vacuum brake booster coupled to a manifold of an internal combustion engine include measuring an engine or vehicle operating parameter to detect operating or control conditions and detecting degradation of the sensor based on the engine or vehicle operating parameter. In one embodiment the operating parameter is a measured or estimated manifold pressure. A pressure drop across a check valve disposed between the brake booster and the intake manifold may also be considered.

Abstract: An oxygen sensor for measuring exhaust gases of an internal combustion engine is described. The sensor provides an output that has a high gain near the stoichiometric air-fuel ratio, and a lower gain in the lean and rich air-fuel ratio regions. Further, the sensor provides wide range air-fuel ratio signal to be used in engine feedback control.

Abstract: A flight control actuation system comprises a controller, electromechanical actuator and a pneumatic actuator. During normal operation, only the electromechanical actuator is needed to operate a flight control surface. When the electromechanical actuator load level exceeds 40 amps positive, the controller activates the pneumatic actuator to offset electromechanical actuator loads to assist the manipulation of flight control surfaces. The assistance from the pneumatic load assist actuator enables the use of an electromechanical actuator that is smaller in size and mass, requires less power, needs less cooling processes, achieves high output forces and adapts to electrical current variations. The flight control actuation system is adapted for aircraft, spacecraft, missiles, and other flight vehicles, especially flight vehicles that are large in size and travel at high velocities.

Abstract: Solvents useful to dissolve dyes employed in pressure-sensitive copying systems comprise aryl esters of benzoic or substituted benzoic acid having the structure: ##STR1## wherein R.sub.1 is hydrogen, methyl or ethyl; R.sub.2 is hydrogen or C.sub.1 to C.sub.9 alkyl; R.sub.3 is hydrogen, methyl or ethyl; and n is zero or 1.

Abstract: Pressure-sensitive record materials wherein a colorless or substantially colorless chromogen is reacted in the presence of a solvent with an acidic sensitizing material to form a colored mark in a pattern determined by the application of localized pressure to the record material are prepared utilizing terphenyls, partially hydrogenated terphenyls, and lower alkylated terphenyls having at least 65 percent aromaticity as the solvent for the chromogenic material. The terphenyl compounds which are liquids are useful alone or in combination with diluents to give rapid color development on both resin and clay coated papers. Compounds which are normally solids or semisolids are useful in combination with diluents where the combination is a liquid.