Abstract: A controller is interposed between the O2 sensor and electronic control unit of a motor vehicle to modify the O2 sensor signals before they are received by the electronic control unit so that a richer fuel mixture is introduced into the internal combustion engine of the motor vehicle than would otherwise be the case.

Abstract: Apparatus for testing and evaluating the performance of an automobile under simulated conditions includes torque applicators for connection to wheel shafts of an automobile and for applying torque forces to the wheel shafts, movable supports supporting the torque applicators and a force applicator for connection to the automobile to apply forces to the automobile. A control associated with the torque applicators and the force applicator varies the torque forces applied by the torque applicators to the wheel shafts and varies the forces applied to the automobile by the force applicator.

Abstract: A sensor is employed in conjunction with an internal combustion engine having at least one hydrocarbon fuel combustion chamber and an air inlet for introducing air into the combustion chamber to sense termination of operation of the internal combustion engine. The sensor closes a valve leading to a carburetor inlet of the engine when termination of operation of the internal combustion engine is sensed. The valve and associated structure improve the performance of the internal combustion engine when the valve is in open position by enhancing fluid flow through the air inlet leading to the carburetor during operation of the internal combustion engine.

Abstract: A cloned cDNA containing complete coding sequence for the expression of a protein with all properties of the precursor to human procathepsin L is described. All of the protein's major domains, including the pre, pro, and carboxyterminal extensions are represented in the full length cDNA sequence of the present invention.