Abstract: System, especially for a motor vehicle, able, on the one hand, to start up an internal-combustion engine and, on the other hand, to charge an electrical circuit, including a main electrical machine able to operate, on the one hand, as a generator and, on the other hand, as an electric motor, the said electrical machine driving the internal-combustion engine by means of a belt when it is operating in motor mode, the system further including management means which drive the main electrical machine, characterised in that it includes a supplementary starter, as well as means for detecting at least one condition for triggering the activation of the said supplementary starter, and the management means drive the main electrical machine and the starter, according to a particular sequence, when the said condition is detected by the said detection means.

Abstract: A control apparatus for an internal combustion engine can detect a tubing disconnection failure of an intake pressure sensor thereby to make it possible to give a warning to a user and to take appropriate measures to cope with such a failure situation. A control unit controls the engine based on a throttle opening, an intake pressure measured by an intake pressure sensor, and a rotational speed and a crank angle of the engine. The intake pressure sensor is connected to the intake system through tubing. The control unit includes a failure diagnosis section that detects an abnormality of the intake pressure sensor. The failure diagnosis section detects an open circuit or a short circuit of a signal line between the intake pressure sensor and the control unit based on a change in the intake pressure, and also detects a disconnection failure of the tubing of the intake pressure sensor.

Abstract: A method for improving engine position sensing of an internal combustion engine is described. According to one aspect of the description, the determination of engine position may be improved by correcting rotational position of the internal combustion engine at a number of engine locations.

Abstract: A engine control device for a construction machine of the present invention is configured so that the engine control device comprises a first switch for selecting effectiveness/ineffectiveness of an automatic deceleration control by a controller and a second switch for selecting effectiveness/ineffectiveness of an automatic stop control, and that when a predetermined automatic stop condition is met even if the ineffectiveness of the automatic deceleration control is selected by the controller, the automatic deceleration control which reduces an engine speed is caused to be operated for a fixed period prior to the automatic stop control.

Abstract: A fuel delivery system arrangement is provided which includes a clip having an inner circumferential surface which engages the fuel injector body but has an outer circumferential surface which is inserted within the fuel rail injector cup outlet. Therefore an inadvertent torque placed upon the fuel injector will cause the outer diameter of the clip to engage the interior of the cup and thereafter be prevented from opening.

Abstract: A working angle (lift amount) of an intake valve is set to a predetermined first set value A1 during a period from when starting of the engine is initiated until when the engine is shifted to an initial combustion state, and the working angle is changed to a second set value A2 (=previous value (initial value is A1)+?) that is larger than the first set value A1 during a period from when the engine is shifted to the initial combustion state until when the engine is shifted to a perfect combustion state. When an engine rotational speed becomes equal to or higher than a reference rotational speed n1, it is determined that the engine has been shifted to the perfect combustion state, after which an engine starting routine ends.

Abstract: An apparatus for controlling sound of an engine comprises a sound sensor, an exhaust valve, and a controller. The controller is configured to determine a sound level of a peak sound frequency within a predetermined sound frequency range by use of output from the sound sensor, compare the sound level of the peak sound frequency to a predetermined sound level, and change the position of the exhaust valve based on the comparison between the sound level of the peak sound frequency and the predetermined sound level. An associated method is disclosed.

Abstract: A control device for controlling an engine driven vehicle that drives a generator by an engine to supply power to an external load when the vehicle is stopped, including: rotational speed limiting means for controlling to limit a rotational speed of the engine to a limit rotational speed or lower corresponding to an upper limit value accepted while driving when the vehicle is driven, and to limit the rotational speed of the engine to a limit rotational speed or lower corresponding to a rotational speed slightly higher than an upper limit value of the rotational speed required for supplying power from the generator to the external load when the vehicle is stopped to supply power from the generator to the external load.

Abstract: A control device for controlling an engine driven vehicle that drives a generator by an engine to supply power to an external load when the vehicle is stopped, including: rotational speed limiting means for controlling to limit a rotational speed of the engine to a limit rotational speed or lower corresponding to an upper limit value accepted while driving when the vehicle is driven, and to limit the rotational speed of the engine to a limit rotational speed or lower corresponding to a rotational speed slightly higher than an upper limit value of the rotational speed required for supplying power from the generator to the external load when the vehicle is stopped to supply power from the generator to the external load.

Abstract: A method and a device for operating an internal combustion engine having exhaust-gas recirculation are provided, which make it possible to dispense with an ambient-pressure sensor. In this context, an intake-manifold pressure and an ambient pressure are modeled. The intake-manifold pressure is modeled as a function of the modeled ambient pressure. The intake-manifold pressure is also measured. The modeled intake-manifold pressure is compared to the measured intake-manifold pressure. The modeled ambient pressure is adapted as a function of the comparison result. The modeled ambient pressure is adapted only when the exhaust-gas recirculation is inactive.

Abstract: A device comprising a cylinder head and its cover for mounting onto an engine block of an internal combustion engine are disclosed, wherein a passageway arranged in the cylinder head cover ensures the circulation of gases loaded with oil in a chamber which is lined with alternately opposing walls that define baffles, until completely de-oiling, by settling, the gases which arrive on the bottom wall of the cylinder head cover situated downstream from baffles. The settled oil passes through openings of bottom wall and returns towards an oil core of the cylinder head, while the de-oiled gases are routed downstream from an intake valve by a set of ducts. The device makes it possible to completely integrate the circulation, de-oiling and return of the gases to the intake, inside the cylinder head.

Abstract: Herein is disclosed a snowmobile configured to start in response to a remote-start signal. One embodiment of the invention includes a snowmobile outfitted with a remote starting system. The remote starting system, itself, includes a remote starting activation switch that transmits a radio frequency signal to a remote starter module to initiate starting of an engine within the snowmobile. The remote starter module receives the radio frequency signal from the remote starting activation switch and, in response to receiving the radio frequency signal, initiates closure of a switch interposed between a battery and a starter motor, thereby causing the starter motor to crank and start the engine of the snowmobile. The engine may be shut off by the remote starting system if the engine RPM exceeds a threshold value.

Abstract: A return spring is constituted of a torsion spring, a spring part is held at a position different from that of a shaft part of a flyweight, and a free end portion of the return spring is hooked to a slide unit of the flyweight. The position of transmission of an urging force to be transmitted from the return spring to the flyweight is different between an angle-closing side and an extending and opening side. By tuning the shape of the slide unit, the position of protrusion of a spring fixing pivot, or the like, the distance from the shaft part to a contact point of the free end portion when the flyweight is located at the angle-closing position is set to be larger than the distance from the shaft part to the contact point of the free end portion when the flyweight is located at the extending and opening position.

Abstract: An engine ECU executes a program including the steps of: detecting an air intake; subtracting an air fuel ratio detected by an upstream air fuel ratio sensor from that detected by a downstream air fuel ratio sensor; using the calculated air fuel ratio difference to determine a range for a lower GA range; determining a range for a higher GA range; and determining from the combination of the determined ranges of the lower and higher GA ranges whether a section A's exhaust system operates normally or has abnormality.

Abstract: An intake parameter estimating device is provided for estimating a tuning frequency of an internal combustion engine, which in turn can be used to estimate an intake air pressure of the internal combustion engine. The intake parameter estimating device basically has a fundamental frequency calculating section, an engine rotational speed detecting section and a tuning frequency calculating section. The fundamental frequency calculating section calculates a fundamental frequency of a pressure wave inside an air intake pipe based on a shape of the air intake pipe and speed of sound. The engine rotational speed detecting section detects an engine rotational speed. The tuning frequency calculating section calculates a tuning frequency of the pressure wave inside the air intake pipe based on the fundamental frequency and the engine rotational speed. The tuning frequency can then be used to estimate the intake air pressure of the internal combustion engine.

Abstract: A method and a device for starting an engine system, especially of a vehicle, which make possible a start of the engine system that is as quick and comfortable as possible. In this context, it is tested for a start request whether a starter-free starting method leads to a successful start of the engine system. For the case in which the test result is negative, the engine system is started automatically using a starter.

Abstract: When an operation of internal combustion engine is stopped, the power consumption of a control unit is lowered, to measure an elapsed time. When the elapsed time reaches a standby time, the processing of lowering the power consumption is cancelled, to diagnose whether or not the leakage occurs in an evaporation purge line of a fuel vapor processing apparatus.

Abstract: A kill-switch control circuit for use with a light-duty combustion engine determines whether to execute a controlled shut down method or an immediate shut down method in response to kill-switch activation. The selection of a shut down method is made, at least in part, by using engine speed readings and by counting engine revolutions. The controlled shut down method utilizes ignition timing delay and/or spark ratio techniques to quickly bring the engine to a stop, yet does so in a controlled manner that avoids backfiring and other undesirable effects. Conversely, the immediate shut down method abruptly stops sending a current to the spark plug.

Abstract: The invention is directed at a device that reduces the size of an engine in the direction along the axis of a crankshaft. More specifically, it relates to an engine starting system in which a part of a starting power transmission gear train is provided between one end portion of a crankshaft rotatably borne on a crankcase and a starter motor mounted to the crankcase is covered from the outside by an accessory coupled to and operated in conjunction with the crankshaft.

Abstract: An engine driven vehicle having a function of supplying power to an external load from a generator driven by an engine that is operated in a power generation mode while the vehicle is stopped, including: throttle position determination means for determining whether a throttle valve is placed closer to an acceleration side than a normal position in the power generation mode while the engine is operated in the power generation mode; and safety engine control means for conducting a control to prevent the engine from being operated at a higher speed than a set speed limit when the determination means determines that the throttle valve is placed closer to the acceleration side than the normal position in the power generation mode.