Abstract: A welding control device includes an actual position determination part configured to determine an actual position of the position control target on the basis of a weld characteristic amount detected from a captured image captured so as to include at least the position control target, the welding characteristic amount including at least one of a wire position of the weld wire or an electrode position of the electrode; a target position determination part configured to determine a target position being a target of the actual position corresponding to a weld condition for welding the weld target; and a position control part configured to execute a position control of the position control target to bring the actual position to the target position.

Abstract: A system for controlling a compression ignition engine includes: a speed obtaining section which detects or estimates an engine speed achieved by combustion in an n-th cycle; and an injection amount setting section which sets, in a start period after the start of cranking, a fuel injection amount to be injected by injectors in an (n+1)-th cycle. If the engine speed achieved by the combustion in the n-th cycle falls in the resonance range, the injection amount setting section sets the fuel injection amount for an (n+1)-th cycle to be larger than the fuel injection amount injected when the engine speed is higher than or equal to an upper limit of the resonance range.

Abstract: A system for controlling a compression ignition engine includes: a speed obtaining section which detects or estimates an engine speed achieved by combustion in an n-th cycle; and an injection amount setting section which sets, in a start period after the start of cranking, a fuel injection amount to be injected by injectors in an (n+1)-th cycle. If the engine speed achieved by the combustion in the n-th cycle falls in the resonance range, the injection amount setting section sets the fuel injection amount for an (n+1)-th cycle to be larger than the fuel injection amount injected when the engine speed is higher than or equal to an upper limit of the resonance range.

Abstract: At start of an engine, a fuel injection amount is set to a jump-over injection amount if the engine speed obtained in each cycle is higher than or equal to a determination threshold value, which is set lower than a lower limit of a resonance speed range of powertrain by a predetermined reference value. If the engine speed is lower than the value, the fuel injection amount is set to a step-over injection amount that is smaller than the jump-over injection amount. This setting makes it possible to increase the engine speed such that the engine speed approaches the lower limit of the resonance speed range causing resonance in the powertrain, up to a predetermined range, and then causes the engine speed to jump straight to an engine speed which exceeds the resonance speed range, while in the process of increasing the engine speed by executing the combustion cycles.

Abstract: A system for controlling a compression ignition engine includes: a speed obtaining section which obtains an engine speed; and an injection amount setting section which sets, in a start period after the start of cranking, a fuel injection amount to be injected by injectors in next and subsequent cycles. If an engine speed achieved by combustion in an (n?1)-th cycle is higher than or equal to a determination threshold value and lower than a lower limit of the resonance range, the injection amount setting section sets the fuel injection amount for the n-th cycle to a jump-over injection amount, and sets the fuel injection amount for the (n+1)-th cycle to a resonance induction reducing amount, which is smaller than the jump-over injection amount.

Abstract: A system for controlling a compression ignition engine includes: a speed obtaining section which obtains an engine speed; and an injection amount setting section which sets, in a start period after the start of cranking, a fuel injection amount to be injected by injectors in next and subsequent cycles. If an engine speed achieved by combustion in an (n?1)-th cycle is higher than or equal to a determination threshold value and lower than a lower limit of the resonance range, the injection amount setting section sets the fuel injection amount for the n-th cycle to a jump-over injection amount, and sets the fuel injection amount for the (n+1)-th cycle to a resonance induction reducing amount, which is smaller than the jump-over injection amount.

Abstract: At start of an engine, a fuel injection amount is set to a jump-over injection amount if the engine speed obtained in each cycle is higher than or equal to a determination threshold value, which is set lower than a lower limit of a resonance speed range of powertrain by a predetermined reference value. If the engine speed is lower than the value, the fuel injection amount is set to a step-over injection amount that is smaller than the jump-over injection amount. This setting makes it possible to increase the engine speed such that the engine speed approaches the lower limit of the resonance speed range causing resonance in the powertrain, up to a predetermined range, and then causes the engine speed to jump straight to an engine speed which exceeds the resonance speed range, while in the process of increasing the engine speed by executing the combustion cycles.

Abstract: A control apparatus for an engine is provided. The control apparatus includes an intake control valve controller for fully closing, when an engine stop request is issued, an intake control valve for adjusting a flow rate of intake air passing through an intake passage of the engine, an engine speed increase controller for increasing an engine speed to reach a target speed after the intake control valve is fully closed by the intake control valve controller, and a fuel injection stopper for stopping a fuel injection after the engine speed is increased by the engine speed increase controller.

Abstract: An alternator configured to acquire a motive force from an engine to generate electricity and a capacitor capable of storing therein the electricity generated by the alternator are provided. An electricity consumption amount required during learning is calculated, and a capacitor electricity amount is compared with the calculated electricity consumption amount, and when the capacitor electricity amount is equal to or less than the calculated electricity consumption amount, the alternator is operated to generate electricity until the capacitor electricity amount is increased beyond the calculated electricity consumption amount.

Abstract: A control apparatus for an engine is provided. The control apparatus includes an intake control valve controller for fully closing, when an engine stop request is issued, an intake control valve for adjusting a flow rate of intake air passing through an intake passage of the engine, an engine speed increase controller for increasing an engine speed to reach a target speed after the intake control valve is fully closed by the intake control valve controller, and a fuel injection stopper for stopping a fuel injection after the engine speed is increased by the engine speed increase controller.

Abstract: An alternator configured to acquire a motive force from an engine to generate electricity and a capacitor capable of storing therein the electricity generated by the alternator are provided. An electricity consumption amount required during learning is calculated, and a capacitor electricity amount is compared with the calculated electricity consumption amount, and when the capacitor electricity amount is equal to or less than the calculated electricity consumption amount, the alternator is operated to generate electricity until the capacitor electricity amount is increased beyond the calculated electricity consumption amount.