Abstract: Provided is an exhaust gas recirculating device which can curb strange noises caused by the opening and closing of a reed valve. An EGR duct (14) has a greater volume than the prior art in order to curb resonance within the EGR passage (Eg) of the opening and closing sounds generated by the reed valve (13). Specifically, the EGR duct (14) has resonant frequency characteristics which differ from the resonance frequency of the reed valve (13), and has a shape such that strange noises generated by the reed valve (13) do not resonate within the EGR duct (14).

Abstract: A regulating device may include a housing that defines an inlet chamber and an outlet chamber, with a flow restriction seat between the inlet chamber and the outlet chamber. A flow restriction valve is movable relative to the flow restriction seat to adjust the flow between the inlet chamber and the outlet chamber of the regulating device. A servo valve having a servo chamber may be used to adjust the position of the flow restriction valve. The servo chamber may be fluidly coupled to the inlet chamber though a fixed flow restriction and to the outlet chamber though an adjustable flow restriction. A stepper motor may be used to adjust the servo valve to adjust the adjustable flow restriction between the servo chamber and the outlet chamber. This causes a change of the servo pressure, which moves the flow restriction valve and adjusts the flow of the regulating device.

Abstract: A steering and engine speed control mechanism for operating a vehicle. The control mechanism has a control handle mounted on the vehicle. The control handle is configured to deflect about an axis by movement of an operator's hand. A steering direction of the vehicle is related to a deflection angle of the control handle about the axis. An actuating element for changing the speed of the engine of the vehicle is attached to the control handle and is conveniently movable by an operator's digit to a plurality of positions to effect the desired speed of the engine.

Abstract: An electrical internal combustion engine actuating arrangement includes a housing cover with a position sensor and a housing body having disposed therein an electric drive motor and an output shaft having a position transducer. The housing cover and the electric drive motor are connected via at least one electrical plug connection arrangement including a plug blade and an opposite plug clamp having a plug-in slot. The housing body and the housing cover include a positioning arrangement having a positioning pin and a positioning bore configured to receive the positioning pin. The at least one electrical plug connection arrangement includes, on a side of the plug clamp, a plug blade guide with a guide slot arranged in parallel with the plug-in slot and a plug-in axis of the positioning arrangement.

Abstract: A variable speed drivetrain for an electronic throttle body is disclosed. The system includes a gear arrangement for the drivetrain of the electronic throttle body that includes a driving gear, a set of driven gears and a set of intermediate gears. The system also includes a clutch that is configured to selectively engage with one of the driven gears according to the selected mode of operation.

Abstract: An intake control device for a vehicle engine includes: a throttle body; a main throttle valve configured to be opened or closed in response to an operation applied to a throttle grip, the main throttle valve being rotatably supported by the throttle body; a sub-throttle valve configured to be opened or closed under control of an actuator, the sub-throttle valve being rotatably supported by the throttle body; an intake air path formed in the throttle body and provided with the main throttle valve and the sub-throttle valve so as to open or close the intake air path; and a bypass air path that is different from the intake air path and provided with an idle speed control (ISC) valve that is controlled so as to open or close the bypass air path in conjunction with the sub-throttle valve.

Abstract: A method for controlling the idle speed of an internal combustion engine is presented. The method comprises controlling an ignition timing at least partly based on the engine speed and controlling a position of a throttle valve at least partly based on the ignition timing. Preferably, the ignition timing is controlled so that it is restricted by at least one ignition timing limit, and the position of the throttle valve is controlled at least partly based on the ignition timing as not restricted by the at least one ignition timing limit.

Abstract: A throttle control device having a quick response and a control stability in the ISC running mode of an internal combustion engine comprises: feedback control means for outputting an amount of activation for activating a drive motor by using a predetermined control gain such that the real opening of a throttle valve detected by a throttle opening sensor for detecting the real opening of the throttle valve may be equalized to either a desired opening based on at least the depression of the accelerator pedal or a desired opening at the ISC time based on at least the speed of the internal combustion engine; and correction coefficient adjusting means for correcting the activation amount outputted from the feedback control means, with a predetermined correction coefficient on the basis of the decision result of a throttle operation mode deciding means for deciding the operation mode of the throttle valve.

Abstract: An air amount control valve is connected to a sidewall of a throttle body in which a main air passage for supplying intake air into an internal combustion engine is formed. The air amount control valve has a bypass air passage bypassing the main passage and controls an amount of air flowing through the bypass air passage, thereby controlling an idling speed of the engine. The air amount control valve includes an aluminum alloy housing having a valve hole and a rotatable valve body having a valve surface facing a fringe wall of the valve hole. To prevent deposits from adhering to the fringe wall facing the valve surface, an anodic oxide film is formed to cover the fringe wall and further a fluororesin film is formed on the anodic oxide film.

Abstract: A control for controlling an intake air into an engine is provided. A control valve for adjusting an amount of the intake air into the engine is provided. A desired opening degree of a control valve provided in an intake air passage into the engine is determined based on a clogging coefficient. The clogging coefficient indicates a degree of clogging of the intake air passage. An opening degree of the control valve is controlled to converge to the desired opening degree. The clogging coefficient is updated based on a feedback correction amount for feedback controlling a rotational speed of the engine during idling operation. If a leakage in a blow-by gas passage that is connected between the engine and the intake air passage is detected, the update of the clogging coefficient is prohibited.

Abstract: An intake control system has intake control valves disposed in intake passages of cylinders of a multi-cylinder internal combustion engine. ECU controls the opening degrees of the intake control valves of the respective cylinders based on signals from sensors to converge rotation speed of the engine in a lower limit rotation speed above which the engine does not stall during an idling operation of the engine.

Abstract: A method for controlling a positioning device of an internal combustion engine includes the an electric motor for actuating the positioning device. The electric motor actuates the positioning device against the spring bias torque. A first current is supplied to the electric motor to move the motor to an actual position. The actual position of the throttle plate is compared to a requested position. The first current is monitored to determine the required current to oppose the spring torque at the actual position. The requested position is summed with a spring opposition term based upon the required current into a adjusted requested position. Finally, a current is supplied to the electric motor to move the positioning device to an adjusted requested position.

Abstract: A method for controlling a positioning device of an internal combustion engine includes the steps of: providing an electric motor for actuating the positioning device; detecting a position of the positioning device in relationship to a stop; determining whether the positioning device is near the stop; enabling overshoot when the positioning device is not near the stop; determining a velocity of the positioning device; and, enabling overshoot of the positioning device when the positioning device is near the stop, but the velocity is below a predetermined value.

Abstract: A method and apparatus for providing corrected throttle valve opening data to the ECU for calculation of various engine parameters includes computing a throttle opening adjustment value H by subtracting a sensed throttle valve opening S from a actual throttle valve opening D at engine idle. An adjusted throttle valve opening K is computed throughout the range of throttle openings by adding the adjustment value H to the sensed throttle valve opening S. In this manner, an erroneous sensed throttle valve opening S is corrected by the adjustment value H. The process of determining the throttle valve adjustment value preferably is performed at the engine idle state and can be triggered by a physical trigger; by connecting and disconnecting certain electronic devices from the ECU according to a prescribed pattern; by shifting an outboard motor from a neutral to a forward or reverse state; or by other triggering means.

Abstract: An electrically operated throttle valve assembly 110, 210 having a throttle shaft 18, 218 with a portion extending exteriorly of the throttle body 12. Rotor 166, 266 is mounted on the extending portion of shaft 18, 218. A housing 80 concentrically surrounds the rotor 166, 266 and includes a rear wall 86, 286 to which stator 134, 234 is attached. The stator 134, 234 having a plurality of circumferentially spaced pole segments each with a coil is mounted to the rear wall 86, 286 and is concentrically disposed within the rotor 166, 266. The hollow cylindrical rotor 166, 266 with plural magnets 72, 74, 272, 274 disposed about the inner periphery has a radial web flange 168, 268 which is drivingly attached to one end of the extending portion of shaft 18, 218 with the rotor 166, 266 nested over the stator pole segments.

Abstract: A dish-shaped combustion chamber (14) is formed in a diesel engine piston (13), and a fuel injector (16) is installed on the center axis of this combustion chamber (14). A device (3,41) is provided for varying the intake air amount aspirated into the engine. It is determined whether the engine is an idle running state or a normal running state. The device (3,41) is controlled so that the intake air amount in the idle running state is less than the intake air amount in the normal running state, and the injector (16) is controlled so that part of the fuel is injected before a main injection when the engine is in the idle running state.

Abstract: A device for controlling the amount of the air taken in by an engine, for improving the starting performance of when the accelerator pedal is depressed from the idling state. The device comprises a throttle control means 10A for operating a target throttle opening degree &thgr;o of a throttle valve 6 based on said throttle opening degree &thgr;, an accelerator opening degree &agr; and an idle signal D, and a throttle actuator 7 for opening and closing said throttle valve so that said throttle opening degree comes into agreement with said target throttle opening degree, wherein said throttle control means includes a means 11 for operating a first target throttle opening degree &thgr;o1 based on said accelerator opening degree, a means 12 for operating a second target throttle opening degree &thgr;o2 based on the idle signal, and a means 13 for operating a target throttle opening degree &thgr;o by adding up the first and second target throttle opening degrees together.

Abstract: A throttle valve is rotatably mounted to a throttle body through a throttle shaft. An internal bore shape of the throttle body is of a straight bore type having a shape in which the center of rotation of the throttle valve is placed on the central line of the throttle body. Spherically-shaped internal profile portions are provided in an idle control region lying in the neighborhood of a fully-closed angle of the throttle valve. Further, spherically-shaped internal profile portions are provided as regions following the spherically-shaped internal profile portions referred to above. Moreover, regions each formed by a spherical shape and a composite surface profile of a cylindrical surface substantially parallel to the flow of intake air or regions each formed by a conical surface profile are provided as regions following the spherically-shaped profiles. Incidentally, the center of each spherical profile is offset on the central line of the bore in upward and downward directions.