Abstract: An electronic fuel injection control device of the present invention has at least a fuel injection device for injecting a fuel devoted to a combustion, and a power source circuit for rectifying and stabilizing an alternating-current voltage generated, based on a rotation of a crank shaft; controls the fuel injection device in an internal combustion engine started by rotating the crank shaft through a manual operation; and further has a power source voltage detection mechanism for detecting a value of a power source voltage supplied to the injection device by the circuit, and an Information processing mechanism for starting an operation when receiving a supply of a direct-current voltage from the circuit, initializing itself, inputting a power source voltage value detected by the detection mechanism, and instructing a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value.

Abstract: In a cruise controller for a saddle-seat vehicle, it is configured to comprise desired throttle opening control execution means (ECU 110) for executing desired throttle opening control by operating the actuator (74) such that the actual throttle opening becomes the desired throttle opening, determine whether the throttle opening command APS is in a predetermined relationship with the actual throttle opening TPS (S60), and switch the cruise control to the desired throttle opening control (S50) when it is discriminated that they are in the predetermined relationship and a disable condition has been established (S62 to S66). By suitably setting the predetermined relationship, the cruise control can be disabled and shifted to the desired throttle opening control at the actual throttle opening anticipatable by the operator, so that driving feel is not impaired and no unnecessary engine output is produced upon switching to the desired throttle opening control.

Abstract: In a cruise controller for a saddle-seat vehicle, it is configured to comprise desired throttle opening control execution means (ECU 110) for executing desired throttle opening control by operating the actuator (74) such that the actual throttle opening becomes the desired throttle opening, determine whether the throttle opening command APS is in a predetermined relationship with the actual throttle opening TPS (S60), and switch the cruise control to the desired throttle opening control (S50) when it is discriminated that they are in the predetermined relationship and a disable condition has been established (S62 to S66). By suitably setting the predetermined relationship, the cruise control can be disabled and shifted to the desired throttle opening control at the actual throttle opening anticipatable by the operator, so that driving feel is not impaired and no unnecessary engine output is produced upon switching to the desired throttle opening control.

Abstract: The engine acceleration detection device compares a intake manifold pressure at a certain crankshaft angle with the intake manifold pressure at 720 degrees before this crankshaft angle. If the difference between these two pressures is a predetermined value or more and the former is higher than the latter, the engine acceleration detection device determines that the engine is in acceleration status. The acceleration of the engine is determined without using a throttle valve opening sensor.

Abstract: A rotor is provided such that the rotor rotates with a crank shaft of an engine. A plurality of detection sections are formed on a rotor periphery at equal angle intervals. A particular detection section is used for detection of a reference crank angle. A pickup is provided near the rotor periphery. A crank angle detecting apparatus receives pulse signals from the pickup, and sequentially detects a detection section time. The detection section time is a time interval from the front end to the rear end of the detection section. The crank angle detecting apparatus also sequentially detects a time between each two adjacent detection sections (detection section distance time), which is a time from the rear end of one detection section to the front end of the next detection section. A reference angle detection signal, which indicates detection of the detection section dedicated for the reference angle, is generated when at least two ratio conditions are met.

Abstract: A crank angle detector and an ignition timing controller comprises a rotor rotated in association with a crank shaft of an internal combustion engine and having detection portions to be detected at equivalent angle intervals in the outer circumference; and a pickup arranged in the vicinity of the outer circumference of the rotor, for generating a pulse signal when the detection portions each pass; wherein one detection portion located immediately before the crank angle corresponding to the upper dead point of a piston of the internal combustion engine, of the detection portions is set to detect a reference angle of the crank angle.

Abstract: An engine start control device capable of starting upon receiving generated power from a generator which is driven by a starter, includes a fuel injection timing setting device which makes a power generation waveform of the generator correspond to a crank pulse signal, and outputs a fuel injection signal to an injector for injecting fuel to the engine in conformance with a crank pulse signal for when a voltage of the generated power reaches a peak value after a starting operation of the starter.

Abstract: A rotor is provided such that the rotor rotates with a crank shaft of an engine. A plurality of detection sections are formed on a rotor periphery at equal angle intervals. A particular detection section is used for detection of a reference crank angle. A pickup is provided near the rotor periphery. A crank angle detecting apparatus receives pulse signals from the pickup, and sequentially detects a detection section time. The detection section time is a time interval from the front end to the rear end of the detection section. The crank angle detecting apparatus also sequentially detects a time between each two adjacent detection sections (detection section distance time), which is a time from the rear end of one detection section to the front end of the next detection section. A reference angle detection signal, which indicates detection of the detection section dedicated for the reference angle, is generated when at least two ratio conditions are met.

Abstract: An electronic fuel injection control device of the present invention has at least a fuel injection device for injecting a fuel devoted to a combustion, and a power source circuit for rectifying and stabilizing an alternating-current voltage generated, based on a rotation of a crank shaft; controls the fuel injection device in an internal combustion engine started by rotating the crank shaft through a manual operation; and further has a power source voltage detection mechanism for detecting a value of a power source voltage supplied to the injection device by the circuit, and an Information processing mechanism for starting an operation when receiving a supply of a direct-current voltage from the circuit, initializing itself, inputting a power source voltage value detected by the detection mechanism, and instructing a first fuel injection for the fuel injection device when the input voltage value attains a predetermined voltage value.

Abstract: An engine start control apparatus has a power generating circuit that generates power by a starting operation of a starter apparatus that starts an engine, an engine starting circuit that is connected to the power generating circuit and to which various devices required to start the engine are connected, and an accessory circuit that is connected to the engine starting circuit and is provided with various devices that are not required to start the engine. In a state in which a supply of power to the accessory circuit is stopped, power is supplied from the power generating circuit side to the engine starting circuit side.

Abstract: An engine start control device capable of starting upon receiving generated power from a generator which is driven by a starter, includes a fuel injection timing setting device which makes a power generation waveform of the generator correspond to a crank pulse signal, and outputs a fuel injection signal to an injector for injecting fuel to the engine in conformance with a crank pulse signal for when a voltage of the generated power reaches a peak value after a starting operation of the starter.

Abstract: An idling stop control apparatus includes a starter motor operation prohibiting device, an idling state determination device, an idling stop function determination device, a switch status determination device, an indicator, and an idling stop function rendering inoperative device. The idling stop function rendering inoperative device switches the idling stop function from an operative state to an inoperative state, when the idling state determination device determines that the internal combustion engine is running, and when the switch status determination device determines that the starter switch is turned on.

Abstract: The engine acceleration detection device compares a intake manifold pressure at a certain crankshaft angle with the intake manifold pressure at 720 degrees before this crankshaft angle. If the difference between these two pressures is a predetermined value or more and the former is higher than the latter, the engine acceleration detection device determines that the engine is in acceleration status. The acceleration of the engine is determined without using a throttle valve opening sensor.

Abstract: An idling stop control apparatus includes a starter motor operation prohibiting device, an idling state determination device, an idling stop function determination device, a switch status determination device, an indicator, and an idling stop function rendering inoperative device. The idling stop function rendering inoperative device switches the idling stop function from an operative state to an inoperative state, when the idling state determination device determines that the internal combustion engine is running, and when the switch status determination device determines that the starter switch is turned on.

Abstract: A system for controlling a flow of intake air in a secondary intake air passage during a start-up period of an internal combustion engine. A main intake air passage extends to an intake port of the engine. A throttle valve is located in the main intake air passage. The secondary intake air passage connects to the main intake air passage at a position downstream of the throttle valve. The system includes a heater to heat a thermo-sensitive valve provided in the secondary intake air passage. A valve opening degree of the thermo-sensitive valve changes as the valve is heated by the heater. The system determines a duty ratio that controls a drive current supplied to the heater. The system supplies the drive current to the heater by applying a voltage pulse at a predetermined period. The voltage pulse has a pulse width determined by the duty ratio.

Abstract: An engine start control apparatus has a power generating circuit that generates power by a starting operation of a starter apparatus that starts an engine, an engine starting circuit that is connected to the power generating circuit and to which various devices required to start the engine are connected, and an accessory circuit that is connected to the engine starting circuit and is provided with various devices that are not required to start the engine. In a state in which a supply of power to the accessory circuit is stopped, power is supplied from the power generating circuit side to the engine starting circuit side.

Abstract: An internal combustion engine includes an injector that injects fuel into a cylinder. A plunger-type fuel pump pumps the fuel to the injector from a fuel tank. A control system for the fuel pump includes a unit for determining an injection start timing of the injector, and a drive unit for driving the fuel pump for a second predetermined time that starts a first predetermined time earlier than the injection start timing. This control system makes stable combustion possible even when there are pressure variations in the fuel pumped to the injector.

Abstract: A system for controlling a flow of intake air in a secondary intake air passage during a start-up period of an internal combustion engine. A main intake air passage extends to an intake port of the engine. A throttle valve is located in the main intake air passage. The secondary intake air passage connects to the main intake air passage at a position downstream of the throttle valve. The system includes a heater to heat a thermo-sensitive valve provided in the secondary intake air passage. A valve opening degree of the thermo-sensitive valve changes as the valve is heated by the heater. The system determines a duty ratio that controls a drive current supplied to the heater. The system supplies the drive current to the heater by applying a voltage pulse at a predetermined period. The voltage pulse has a pulse width determined by the duty ratio.

Abstract: An internal combustion engine includes an injector that injects fuel into a cylinder. A plunger-type fuel pump pumps the fuel to the injector from a fuel tank. A control system for the fuel pump includes a unit for determining an injection start timing of the injector, and a drive unit for driving the fuel pump for a second predetermined time that starts a first predetermined time earlier than the injection start timing. This control system makes stable combustion possible even when there are pressure variations in the fuel pumped to the injector.

Abstract: The invention provides a stroke discriminator of an internal combustion engine which can quickly identify the stroke of the internal combustion engine. A rotor operatively associated with a crankshaft of a single cylinder internal combustion engine is provided on the outer periphery thereof with a plurality of detected elements. The rotor is provided, on the outer periphery thereof, with a detected element formed-region having a plurality of detected elements formed thereon at equal angle intervals in the rotational direction and a non-formed region having no detected elements formed thereon. The non-formed region has an angle interval greater than the equal angle interval, and provided on the rotor to pass near detector means when the piston of the internal combustion engine travels from the top dead center to the bottom dead center.