Abstract: A document feeder includes a document placing tray on which a document is placed; a document discharging tray on which a document discharged from a document discharging port in a discharging direction is stacked; and a light source that radiates light to the document discharging tray. The document discharging tray is disposed below the document placing tray. The document discharging tray has a protruding portion protruding upward from the surrounding area. The light source is disposed within a region having a width that is the same as a document having a maximum size in the width direction.

Abstract: A control apparatus for an internal combustion engine can limit a vehicle speed within a permitted maximum speed with high accuracy by preventing a response delay of a throttle opening with respect to an amount of intake air while avoiding deterioration of driveability. The apparatus includes a target opening calculating section that calculates a target opening of an electronic throttle valve from an accelerator opening, and an electronic control section that drives the electronic throttle valve to make the throttle opening coincide with the target opening. The target opening calculating section includes a correction factor calculating section that calculates a correction factor for correcting the target opening.

Abstract: An oxygen sensor deterioration diagnosis apparatus includes an oxygen sensor provided in an exhaust system of an internal combustion engine, an air-fuel ratio control unit for controlling an air-fuel ratio, an operation state detection unit for detecting an operation state of the internal combustion engine, an inversion period measurement unit for detecting an inversion period of an output signal of the oxygen sensor, an oxygen sensor deterioration diagnosis unit for performing a deterioration judgment by comparing the inversion period with a previously set judgment period, and a deterioration diagnosis inhibiting unit for inhibiting, when the operation state detection unit detects the operation state of the internal combustion engine having an influence on the inversion period, the measurement of the inversion period in a period of time of the detection.

Abstract: The air introducing means comprising air pump for introducing air into exhaust pipe and heating device for heating the introduced air are provided. Both an air pump for introducing air into exhaust pipe and a heating device for heating the introduced air are provided. Heating device is connected to the control unit which causes it to stop heating when the temperature of the water for cooling engine exceeds a preset temperature. Idle rotation regulator for keeping the rotational speed of the engine at a level higher than the idling speed is also provided. Further provided is a control unit that actuates the idle rotation regulator when the engine is brought to idling while the heating device performs heating. If the rotational speed of the engine is increased while it is running at idle, more power is generated by dynamo to make up for the power consumption by the heating device.

Abstract: In an apparatus for controlling the introduction of air into an exhaust pipe of an internal combustion engine in which air is introduced from the intake side to the exhaust side to improve the efficiency of purifying exhaust gases, to prevent a decline in the purification efficiency of a catalyst in a state in which the exhaust gas temperature immediately after starting is low. A control valve 11 is provided in an air introducing pipe 9 for introducing air from the intake side to the exhaust side, and the control valve 11 is set in a shut-off state during starting or during starting and a predetermined time duration immediately after starting.

Abstract: A secondary air control apparatus constituted by an exhaust gas purifier 32 of an engine 21, a feed quantity control valve 29 for feeding secondary air, a secondary air heating device 31, and a controller 35 for controlling the feed quantity of secondary air and the secondary air heating device 31. The quantity of secondary air to be fed is set in accordance with the operation conditions of an engine, and the secondary air to be fed is modulated in quantity and heated, so that it is possible to utilize the purifying effect of a catalyst efficiently.

Abstract: In an apparatus for controlling the introduction of air into an exhaust pipe of an internal combustion engine in which air is introduced from the intake side to the exhaust side to improve the efficiency of purifying exhaust gases, to prevent a decline in the purification efficiency of a catalyst in a state in which the exhaust gas temperature immediately after starting is low. A control valve 11 is provided in an air introducing pipe 9 for introducing air from the intake side to the exhaust side, and the control valve 11 is set in a shut-off state during starting or during starting and a predetermined time duration immediately after starting.

Abstract: Windbreak cover is provided on the periphery of both heater and the air introducing pipe through which heated air is permitted to flow. The windbreak cover blocks the wind from blowing against the heater and the air introducing pipe while the vehicle is running. Since neither the heater nor the air introducing pipe is cooled with the wind that blows while the vehicle is running, the temperature of the heated air that is introduced into the exhaust pipe will not drop even when the vehicle is running. As a result, the temperature of the air being introduced can be maintained at a predetermined level, thus permitting the exhaust gas to be purified in consistent manner.

Abstract: In an apparatus for controlling the introduction of air into an exhaust pipe of an internal combustion engine in which air is introduced from the intake side to the exhaust side to improve the efficiency of purifying exhaust gases, to prevent a decline in the purification efficiency of a catalyst in a state in which the exhaust gas temperature immediately after starting is low. A control valve 11 is provided in an air introducing pipe 9 for introducing air from the intake side to the exhaust side, and the control valve 11 is set in a shut-off state during starting or during starting and a predetermined time duration immediately after starting.

Abstract: An apparatus for introducing fresh air into an exhaust pipe of an internal combustion engine for purification of exhaust gas includes an air introducing means disposed between an intake pipe and an exhaust pipe of an internal combustion engine for introducing a fresh air into the exhaust pipe and hence to a catalytic converter, and a heater for heating the fresh air introduced through the air introducing means, wherein the heated air is fed to an catalytic converter via the exhaust pipe. Conversion of noxious components contained in the exhaust gas into harmless components is attained with the enhanced efficiency owing to heating of the fresh air by the heating means.

Abstract: In an internal combustion engine equipped with an intake pipe and an exhaust gas purification/discharge system including an exhaust pipe and a catalytic converter installed in the pipe for purification of engine exhaust gas, an apparatus for controlling introduction of air to the exhaust gas purification/discharge system comprises an air feed pipe having one inlet port and an outlet port connected to the exhaust pipe at a position upstream of the catalytic converter, a valve installed in the air feed pipe at a position downstream of the inlet port, and a computerized controller operatively connected to the valve for controlling the valve such that the air introduction to the exhaust gas purification/discharge system is optimized for exhaust gas purification effected by the catalytic converter.

Abstract: The air introducing means comprising air pump for introducing air into exhaust pipe and heating device for heating the introduced air are provided. Both an air pump for introducing air into exhaust pipe and a heating device for heating the introduced air are provided. Heating device is connected to the control unit which causes it to stop heating when the temperature of the water for cooling engine exceeds a preset temperature. Idle rotation regulator for keeping the rotational speed of the engine at a level higher than the idling speed is also provided. Further provided is a control unit that actuates the idle rotation regulator when the engine is brought to idling while the heating device performs heating. If the rotational speed of the engine is increased while it is running at idle, more power is generated by dynamo to make up for the power consumption by the heating device.

Abstract: An apparatus for controlling idle revolutions of an engine which comprises a controlling member to control an idle revolution changing member so as to adjust the idle revolutions detected by the engine revolution detector to a predetermined number of idle revolutions, in which the controlling member fixes the idle revolution changing member to a predetermined condition during misfiring of the engine detected by a misfire detecting member. Therefore, hunting of the engine can be prevented, and a better riding is thus ensured.

Abstract: A method and apparatus for controlling an engine involves detecting a crank angle of an engine; detecting a rotation number of the engine based on the crank angle; detecting an injection timing by a fuel injection valve; determining an acceleration state; calculating a time period from injection to acceleration initiation based on the acceleration state and the injection timing; detecting a load of the engine; determining an injection correction value based on at least the acceleration initiation timing and the rotation number of the engine; determining a fuel injection pulse width based on the injection correction value, and controlling the fuel injection valve accordingly.

Abstract: An idle running control apparatus for an internal combustion engine includes sensors for sensing the rotational speed or angular velocity of the engine, the opening degree of a throttle valve and the flow rate of intake air sucked into the engine, respectively. A misfiring determiner determines an occurrence of misfiring in the engine when a change in magnitude of the engine rotational speed exceeds a predetermined value. An idle speed adjuster adjusts the flow rate of intake air bypassing the throttle valve during idling so as to properly adjust the idle running speed of the engine. A controller is responsive to the outputs of the detectors and the misfiring determiner for controlling the idle running speed adjuster through feedback control with a control gain previously set such that a desired engine rotational speed is thereby attained.

Abstract: A misfire detecting device of an internal combustion engine comprises a pressure detector(s) for detecting an inner cylinder pressure of the engine, a crank angle detector for detecting a crank angle, and a misfire detector for detecting a misfire based on signals from the pressure detector and the crank angle detector. The misfire detector judges that the engine is under a misfire, when a comparison is made between a first integrated value of an indicated inner cylinder pressure before a predetermined crank angle of a combustion cycle of the engine and a second integrated value of the indicated inner cylinder pressure after the predetermined crank angle, and when there is a difference between the first value and the second value by less than a predetermined value.

Abstract: A trouble diagnosis appartus comprises a cylinder internal pressure change detecting circuit to detect a change in the inner pressure of the cylinders of an internal combustion engine, a differentiation circuit to effect differentiation of an output signal outputted from the cylinder internal pressure change detecting circuit and a judging circuit to judge the internal combustion engine being faulty when a change quantity of output signal of the differentiation circuit is a predetermined value or lower.

Abstract: A misfire detecting device for an internal combustion engine comprises an inner cylinder pressure detector, a crank angle detector, and a misfire detector for determining that a misfire has occurred when the inner cylinder pressure at a predetermined crank angle after top dead center in an engine combustion cycle is below a predetermined value.