Abstract: An object of the present invention is to provide an engine exhaust gas cleaning system which can accurately judge whether or not there is the remaining capacity in an NOx trapping amount of an NOx trapping agent, can optimize the timing of NOx purge control, and can diagnose the deterioration of the NOx trapping agent.

Abstract: By a lean burn operation, a highly efficient operation region is enlarged, the proportion of engine operation in a low torque condition is increased, and the proportion of motor operation using a battery is decreased. It is possible to provide a hybrid car of an engine-electric motor configuration which can effect a highly efficient operation without increasing the capacity of motor and that of battery.

Abstract: By a lean burn operation, a highly efficient operation region is enlarged, the proportion of engine operation in a low torque condition is increased, and the proportion of motor operation using a battery is decreased. It is possible to provide a hybrid car of an engine-electric motor configuration which can effect a highly efficient operation without increasing the capacity of motor and that of battery.

Abstract: The invention provides a method of controlling an air-fuel ratio and for diagnosing a deterioration of a catalyst having an NOx trapping agent in an internal combustion engine. An exhaust gas purifying apparatus having an NOx trapping agent arranged within an exhaust gas passage, an air-fuel ratio changing means temporarily changing the air-fuel ratio of the exhaust gas from the lean to the stoichiometric or rich air-fuel ratio at a predetermined cycle, a particular component detecting means detecting a particular component in the exhaust gas downstream the NOx trapping agent, a NOx discharge or reduction completion judging means, and NOx discharge or reduction completion time detecting means detecting a time required for purifying the NOx.

Abstract: By a lean burn operation, a highly efficient operation region is enlarged, the proportion of engine operation in a low torque condition is increased, and the proportion of motor operation using a battery is decreased. It is possible to provide a hybrid car of an engine-electric motor configuration which can effect a highly efficient operation without increasing the capacity of motor and that of battery.

Abstract: An object of the present invention is to provide an engine exhaust gas cleaning system which can accurately judge whether or not there is the remaining capacity in an NOx trapping amount of an NOx trapping agent, can optimize the timing of NOx purge control, and can diagnose the deterioration of the NOx trapping agent.

Abstract: The present invention provides a compact air induction system for an internal-combustion engine in which an air inlet section, a collection section and the intake port section for a plurality of cylinders of the internal-combustion engine are formed adjacent to each other and connected directly or through a partition wall. A control unit for controlling the engine is mounted in the passage at the downstream of the air inlet section.

Abstract: The present invention provides a compact air induction system for an internal-combustion engine in which an air inlet section, a collection section and the intake port section for a plurality of cylinders of the internal-combustion engine are formed adjacent to each other and connected directly or through a partition wall. A control unit for controlling the engine is mounted in the passage at the downstream of the air inlet section.

Abstract: An electronically-controlled cylinder fuel supply system in which an injector and an ignition plug are provided for each of combustion chambers, in which on the basis of an instruction signal to an engine and a speed of revolution of the engine, the fuel injection initiation timing and valve open duration of the injector, the ignition timing of the ignition plug and the quantity of suction air are determined through retrieval of values from a map stored in a ROM, in which a throttle valve is controlled such that the suction air quantity measured by an air flow meter coincides with the suction air quantity determined by the map retrieval, and in which the injector is provided with a fuel holding portion for temporarily holding the fuel injected during the lowered pressure of the combustion chamber and a vibration element for vibrating the fuel holding portion to atomize the fuel to thereby scatter the atomized fuel into the combustion chamber.

Abstract: An air-flow meter wherein a bypass air passage for bypassing a main air passage is provided in a throttle chamber of an internal combustion engine, and a hot wire is arranged within the bypass air passage, with the amount of air flow being measured on the basis of a change in the resistance of the hot wire. A portion for diverting the direction of air streams is disposed in an upstream part of the bypass air passage so as to assign a dust removing function, and a diameter of the hot wire is selected so that dust particles flowing to the vicinity of the hot wire do not adhere to the hot wire. A surface of the hot wire is coated with glass, and a temperature of the surface of the hot wire is maintained at or above about 100.degree. C. to enhance the prevention of dust particles adhering to the hot wire.