Abstract: A position sensor (20) associated with a brake pedal (22) discloses deceleration request data corresponding to a vehicle deceleration request by the driver. A processor (12) executes an algorithm that compares sensor deceleration request data with data representing deceleration that is potentially obtainable by operating one or more mechanisms in the powertrain such as an exhaust brake or an engine brake. Operation of the one or more mechanisms is requested when the comparison discloses that operation of such mechanisms can satisfy the request, thereby precluding the need to apply foundation brakes. Pedal depression beyond a range within which the mechanisms are potentially capable by themselves of satisfying the request, causes foundation brake application so that a fault that does not result in braking by the mechanisms will cause the foundation brakes to be applied when the driver, sensing lack of braking, depresses the pedal further.

Abstract: A plurality of automated vehicle inspection routines are provided keyed by user identification. Implementation relies on presence of a programmable computer installed on the vehicle with user input/output interfaces through which a user may enter user identification. Once entered the computer matches the user to an inspection routine, which may be customized to the particular individual, or which may apply to a class of users.

Abstract: The invention relates to a new method and system for optimizing the efficiency of an automotive catalytic converter by adjusting the engine air/fuel ratio based on estimates of the actual amount of oxidants stored in the catalyst. An available oxidant storage capacity of the catalyst is determined by establishing an oxidant set point location, i.e., a location in the catalyst about which the system controls the oxidant storage. The oxidant set point is established based on the temperatures of the different potential set point locations and the levels of deterioration of the different potential set point locations, as well as the oxidant storage capacity of the emission control device system.