Abstract: Disclosed is a method of preventing fouling of an exhaust gas recirculation (EGR) cooler of an engine including after a vehicle including the engine reaches a reference mileage, operating, by a controller, an exhaust brake device of the vehicle and blocking the discharge of exhaust gas of the engine, after the exhaust brake device is operated, closing, by the controller, an EGR valve that provides the exhaust gas of the engine to an EGR cooler of an EGR system of the engine, and before the operation of the exhaust brake device is stopped, removing, by the controller, a deposition layer generated in the EGR cooler, by opening the EGR valve.

Abstract: A lighting apparatus disposition structure for a saddle riding vehicle by which a traveling performance can be improved is disclosed. A lighting apparatus includes a laser element, a first light guide member and a second light guide member, a front light emission unit and a rear light emission unit, and a driver unit. The laser element and the driver unit are integrated as a light source unit. The light source unit is disposed between a head pipe that includes a steering axis for a front wheel and a pivot shaft that supports a rear wheel through a swing arm.

Abstract: Methods and systems for providing engine braking for a two stroke diesel engine are described. In one example, a flow through a mechanically driven supercharger is adjusted to provide engine braking for a two stroke diesel engine when engine braking is requested. The level or amount of engine braking may be adjusted via increasing or decreasing flow through the mechanically driven supercharger.

Abstract: Methods and systems for providing engine braking for a two stroke diesel engine are described. In one example, a flow through a mechanically driven supercharger is adjusted to provide engine braking for a two stroke diesel engine when engine braking is requested. The level or amount of engine braking may be adjusted via increasing or decreasing flow through the mechanically driven supercharger.

Abstract: A thermal controller for automotive applications. A thermal controller in an aspect of the present disclosure includes a valve, a motor coupled to the valve, a temperature sensor, flow rate sensor, heater/cooler element, and a controller, coupled to the temperature sensor, flow rate sensor and the motor, in which the controller alters volume and temperature of fluid flow through the valve by turning the motor based on inputs from the temperature sensor.

Abstract: When both a position sensor and a motor malfunction, an ECU limits the engine rotation speed to such a speed range that the pressure inside a circulation route remains at or below a predetermined value even when the opening degree of a control valve is a minimum opening degree. When the position sensor is malfunction but the motor is not malfunction, the ECU relaxes the limits on the engine rotation speed, compared with when both the position sensor and the motor are malfunction, by driving the motor to an end of a motion range thereof and increasing the opening degree of the control valve to an opening degree larger than the minimum opening degree.

Abstract: An instantaneous revolution speed Nm of an input shaft is calculated from an input period of a pulse signal from a revolution sensor, a revolution speed Nf is calculated by filter processing the instantaneous revolution speed Nm, a determination is made that a belt slip occurs when, during a stop of a vehicle, a state in which the revolution speed Nf is equal to or higher than a slip determination speed NSL is continued for a time equal to or longer than slip determination time TSL, and an immediately prior revolution speed Nf is held until a time of a pulse signal no input exceeds a road wheel lock corresponding time TWL which is longer than a slip determination time TSL.

Abstract: A control method using a continuous variable duration apparatus provided to adjust opening duration of an intake valve of an engine may include: setting a desired deceleration speed when a vehicle starts decelerating, determining a pumping loss by the engine that is required for the desired deceleration speed, setting desired duration for the required pumping loss by the engine, and controlling duration of the intake valve on the basis of the set desired duration.

Abstract: An exhaust pipe extends rearward of a vehicle body from an engine located forward of the rear wheels and is supported on the vehicle body frame. An exhaust muffler is coupled to a rear end of the exhaust pipe that is arranged between a pair of right and left rear wheels. A catalytic converter (catalytic device) is installed in the middle of the exhaust pipe and the exhaust pipe is deviated to one side in a horizontal direction of the vehicle body with respect to the engine and the exhaust muffler in order to position the catalytic convertor between the vehicle body frame and the rear wheels.

Abstract: A controller of an engine with a supercharger includes, for each of cylinders, fuel supply system and an ignition plug. The controller includes an electronic control unit that is configured to: (i) set a basic ignition timing depending on an operation state of the engine, (ii) detect, for each cycle, an abnormal combustion generation cylinder in which an abnormal combustion is generated in a supercharged region, (iii) execute a fuel cut to stop a fuel supply by the fuel supply system for the abnormal combustion generation cylinder, (iv) change an ignition timing of the abnormal combustion generation cylinder to expand a crank angle width between a compression top dead center and the basic ignition timing for several cycles after start of the fuel cut, and (v) execute an ignition cut that prohibits a spark from being generated by the ignition plug, further after elapse of the several cycles is executed.

Abstract: A method of controlling a valve assembly includes calculating, by a controller of the valve assembly, one or more electrical signals to move a valve element of the valve assembly dependent on an actual and a desired position of the valve element. The method also includes sending, by the controller, the one or more electrical signals to an electrical actuator of the valve assembly. The method further includes detecting a valve fault condition defined as the actual position of the valve element failing to match the desired position of the valve element after a configurable period has elapsed. When the valve fault condition is detected, the method includes substituting the data corresponding to the desired position of the valve element with pulses of waveform data which oscillate about a value corresponding to the desired position of the valve element until either of two predetermined conditions is met.

Abstract: Disclosed are high pressure test systems and methods. One dynamic fluid gas bleeder manifold includes gas outlet having opposing first and second ends and defining first opening at first end of gas outlet, wherein gas outlet extends between first and second ends along longitudinal axis of gas bleeder manifold, a first fluid inlet having opposing first and second ends defines second opening at first end of first fluid inlet, wherein first fluid inlet extends between first and second ends along first direction forming first acute angle with longitudinal axis, a second fluid inlet having opposing first and second ends defines third opening at first end of second fluid inlet, wherein second fluid inlet extends between first and second ends of second fluid inlet along second direction forming second acute angle with longitudinal axis, an internal fluid passage fluidly couples gas outlet to first and second fluid inlets.

Abstract: An engine controller causes a propulsion engine of a motor vehicle to be fueled in a fueling mode of operation and not to be fueled in a non-fueling mode of operation. A controlled device, such as a clutch or regulator, controls operation of a pneumatic compressor which forces compressed air into a storage tank. The controlled device is controlled according to a strategy which distinguishes between the fueling mode and the non-fueling mode for improving overall vehicle fuel economy.

Abstract: An internal combustion engine exhaust brake control method for increasing a braking force by increasing an exhaust pipe internal pressure when performing exhaust brake control by a vehicle in which an electric turbocharger is connected to an intake system of an engine. The method drives an electric turbocharger to increase a compressor rotation speed to a predetermined rotation speed and to increase an intake air amount when performing exhaust brake control by the vehicle in which the electric turbocharger is connected to the intake system of the engine.

Abstract: A control apparatus for an internal combustion engine (10) includes intake valve control means (50). The internal combustion engine (10) includes a variable intake valve operating mechanism (66) that changes a valve opening characteristic of an intake valve (64), and rich combustion is performed in the internal combustion engine (10) to control an exhaust gas purification catalyst (24) disposed in an exhaust passage (18). The intake valve control means (50) controls the valve opening characteristic of the intake valve (64) to increase a flow rate of intake air in an early stage of an intake stroke when the rich combustion is performed, as compared to when non-rich combustion is performed.

Abstract: A method of evaluating intake air temperature (IAT) sensor rationality may include measuring a first intake air temperature associated with an engine using an IAT sensor when the engine is in a non-operating condition, determining a second intake air temperature associated with the engine using a hot wire air flow meter when the engine is in the non-operating condition, and indicating an IAT sensor fault when a difference between the first and second intake air temperatures exceeds a predetermined temperature limit.

Abstract: In a variable compression ratio internal combustion engine that controls the compression of an internal combustion engine by changing the volume of the combustion chamber of the internal combustion engine in an axial direction of the cylinder, when a target compression ratio (?t) based on an operating condition of the internal combustion engine is at a reference compression ratio (?0) or greater (S102), the compression ratio is changed to the target compression ratio (S103). When the target compression ratio (?t) is lower than the reference compression ratio (?0) (S102), a control is executed to change the compression ratio and also to strength the tumble flow in the combustion chamber (S104).

Abstract: A control system for an engine includes a manifold absolute pressure (MAP) module that compares MAP of an engine to a predetermined MAP and an air/spark module that decreases flow of air and that advances ignition spark when the MAP module indicates that the MAP is greater than a predetermined MAP.

Abstract: A prime mover is provided for a vehicle having a plurality of cylinder chambers, a manifold, and engine brake valves by which the cylinder chambers can be connected to the manifold. A valve or nozzle is disposed on the manifold, by which the manifold can be connected to a feed line of a compressed air treatment system.

Abstract: A method for increasing an engine brake power of an internal combustion engine, particularly of a diesel engine, having at least one cylinder with a reciprocating piston, at least one inlet valve and one outlet valve, and a turbocharger, in which air is compressed by an air compressor and stored in the at least one storage device, and air is injected in a clocked manner into the at least one cylinder in order to increase the compression work performed by the piston and thereby enhance the engine brake power during an engine braking process.

Abstract: A method for increasing an engine brake power of an internal combustion engine, particularly of a diesel engine, having at least one cylinder with a reciprocating piston, at least one inlet valve and one outlet valve, and a turbocharger, in which air is compressed by an air compressor and stored in the at least one storage device, and air is injected in a clocked manner into the at least one cylinder in order to increase the compression work performed by the piston and thereby enhance the engine brake power during an engine braking process.

Abstract: A control apparatus retards ignition timing of the engine, and increases an amount of a fuel supplied to the engine based on a retard amount of the ignition timing, by calculating a maximum engine intake air amount at which an exhaust system temperature can be maintained at or below a predetermined upper limit temperature by increasing the amount of the fuel supplied to the engine without causing a misfire of the engine, and limiting an engine intake air amount to a value no greater than the maximum engine intake air amount.

Abstract: There is provided a control system for controlling an internal combustion engine with an exhaust system provided with a catalyst, comprising a fuel cut means for stopping the supply of fuel to the internal combustion engine when the vehicle in which the internal combustion engine is mounted is in a decelerating state, the control system of an internal combustion engine characterized in that, in the case that the fuel cut is executed, when the speed SPD of the vehicle is higher than a predetermined first vehicle speed Sh, the intake air amount Ga of the internal combustion engine is made smaller than the intake air amount Gai of when the internal combustion engine is in the idling state (step 120), while when the speed SPD is the first vehicle speed Sh or less, the intake air amount Ga is made larger than the intake air amount Gai of when the internal combustion engine is in the idling state (step 130).

Abstract: An engine deceleration control system for an internal combustion engine of a vehicle is arranged to prohibit correcting an air quantity supplied to the engine when an elapsed time period from a moment of turning off of an accelerator of the engine is within a first predetermined time period, or when an elapsed time period from a moment of turning off of a lockup clutch of a torque converter is within a second predetermined time period or when a shifting of a transmission connected to the engine is being executed, and to cancel prohibiting the correction of the supplied air quantity when a braking operation is executed.

Abstract: An outboard motor includes an engine, a throttle valve connected to an inlet air silencer, and an intake manifold connected to a downstream portion of the throttle valve. A control valve is provided between a downstream portion of an intake passageway of the throttle valve and an upstream portion of the intake manifold, for controlling air supply in the low-speed driving of the engine. The control valve has a body formed with an intake passageway. The intake passageway of the body communicates in series with the intake passageway of the throttle valve.

Abstract: An engine control method for improving air-fuel ratio control controls airflow when fuel injector limits are reached. The method includes a transient fuel model to calculate a required fuel injection amount based on actual cylinder air charge and feedback from an exhaust sensor. When the required fuel injection amount is outside an operable range, for example, less than zero, airflow is controlled to prevent deviations of exhaust air-fuel ratio. Otherwise, airflow is controlled to provide a desired engine torque. Alternatively, a minimum allowable airflow is determined based on a minimum achievable fuel flow. Then, airflow is prevented from falling below this minimum allowable airflow. The method is particularly useful in preventing rich excursions during rapid decreases in desired engine torque, such as during a driver tip-out.

Abstract: An outboard motor powers a watercraft and comprises an engine mounted within an engine compartment. The engine comprises an induction system having an induction passage extending between an air intake box to a combustion chamber. A throttle valve is positioned along the passage. A bypass passage communicates with the passage at a location between the throttle valve and the combustion chamber. An adjustable valve controls flow through the bypass passage. The adjustable valve can be closed at a first rate if a the watercraft is traveling at a speed greater than a preset value and at a second rate if the watercraft is traveling at a speed below the preset value.

Abstract: An engine running control apparatus includes a full-closure state detecting device for outputting a full-closure detection signal when the throttle valve is in the fully closed state, a control device for controlling the open degree of the air control valve, a time-measuring device for counting up a predetermined period of time in response to the full-closure detection signal, an engine speed detecting device for detecting the rotating speed of the engine and an initial value setting device for setting up an engine speed at which control of the degree of the opening is started by the control device, in response to the full-closure detection signal.

Abstract: A method for bypassing a controlled quantity of airflow around a throttle body of an internal combustion engine of a motor vehicle during periods of sudden deceleration of the vehicle. The method makes use of a bypass valve having an input end in communication with an air inlet of a throttle body of the engine and an outlet in communication with an air inlet of the intake manifold of the engine. When sudden closing of the throttle is sensed, or when the throttle is closed, the bypass valve is opened to a degree sufficient to enable an additional quantity of air to flow therethrough and into the inlet of the intake manifold. The invention significantly reduces the drop in engine rpm experienced during sudden deceleration of the vehicle, to thereby substantially reduce or eliminate powertrain vibration that results during sudden deceleration.

Abstract: Undershoot of rotation speed is prevented by increasing an intake air amount of an engine when it decelerates. Precise control corresponding to differences of a deceleration state is realized by setting an increase amount of intake air to a different value according to the engine rotation speed and deceleration. Preferably, increasing of intake air amount starts when the engine rotation speed reaches a first predetermined value. It is terminated when the engine rotation speed reaches a second predetermined value smaller than the first predetermined value or when a predetermined time has elapsed, whichever is the sooner.

Abstract: The idling speed controller for an internal-combustion engine includes a judging device for determining whether the internal-combustion engine is in an idling state and whether a variation in the revolutional speed of the internal-combustion engine is equal to or greater than a predetermined value, an air amount adjuster that adjusts an air amount supplied to the internal-combustion engine when it is determined that the internal-combustion engine is in the idling state and the variation in the revolutional speed of the internal-combustion engine is equal to or greater than the predetermined value; and a device for prohibiting the adjustment of the air amount by the air amount adjuster after the passing of a predetermined time from a change of a throttle valve form an open state to a substantially closed state.

Abstract: An electronic control for controlling a high idle set value of equipment having an engine is disclosed. The control includes an electronic controller electrically connected to a rocker switch comprising a high idle switch and a low idle switch. An engine speed sensor and a decelerator pedal position sensor are electrically connected to the electronic controller. The electronic control permits the equipment operator to program a desired high idle set point value. The control thereafter produces an engine speed command based on the high idle set point value. A decelerator pedal is provided to permit the equipment operator to reduce the engine speed command value below the high idle set point value.

Abstract: A piston within the body of the valve is connected to an actuator and is integral with stops. After a first stroke of the piston from its position against the first seat, the first stops entrain second stops integral with a second piston, to entrain this with the first piston over a second stroke, from the position of application of the second piston to its seat. This feeds air-assisted injectors through the outlet over the first stroke, and in addition, over the second stroke to admit air through the outlet bypassing a throttle valve. Control of a single actuator allows the airflow to be regulated through each of the two outlets in succession.

Abstract: A fuel injection device comprises electrically controlled fuel injectors, each opening into an air induction passage upstream of a respective intake valve of a combustion chamber. Each injector has an air-fuel mixture chamber. A throttle valve in the induction passage is constructed to close it when in a minimum opening position. An air line connects the induction passage to the mixture chambers and has an additional air electrically controlled valve. A supplemental electrically controlled valve is branched out of the line and opens into the induction passage downstream of the throttle valve. An electronic unit controls the injectors and the supplementary valve and opens the supplemental valve during cold start of the engine at low temperature and during operation of the engine as a brake at normal temperature, high speed and with the throttle valve closed.

Abstract: In an automotive type engine having an air bypass valve controlling a portion of the air flow to the engine, decelerations are controlled in a manner to minimize or eliminate the conventional large feedback negative torque impulse to the operator usually experienced when fuel is shut off. The air bypass valve is closed down, in response to correct decel conditions, to an air flow level below that scheduled to establish the normal idle speed condition. The positive engine combustion torque is decreased so that the magnitude of the ratio between it and the engine negative torque becomes small. Immediately following fuel shut-off, the bypass valve is reopened to return the air flow to that level establishing the set idle speed condition upon resumption of fuel flow.

Abstract: A bypass air flow rate control apparatus has an idle speed control valve for continuously adjusting an air flow rate and an on-off control valve for allowing and shutting off an air flow passing therethrough. When an atmospheric pressure sensor detects that the atmospheric pressure is lower than a predetermined value, in other words, the density of intake air is lower than a predetermined value, the on-off control valve and the idle speed control valve are switched over. The air flows through the on-off control valve by an amount corresponding to the air flow rate reduced in the idle speed control valve. The valve switching over operation is performed when one of the following three conditions is satisfied: the engine is generating no torque, in other words, the engine is in a fuel cut operation; a load larger than a predetermined load value is applied; and the engine is accelerated at a rate equal to or greater than a predetermined value.

Abstract: An engine control apparatus and method can prevent engine stall in a reliable manner when the engine is changed from a high-speed loaded operation into an idling operation. An air/fuel mixture is supplied to engine cylinders 16 through an intake passage 1 with a throttle valve 6 disposed therein, and a bypass passage 10 with an air valve 12 disposed therein is connected with the intake passage 1 for bypassing the throttle valve 6 to supply auxiliary air to the cylinders. Based on an operating condition signal D in the form of an idle switch on/off signal, an electronic control unit (ECU) 30A detects a change from a loaded operation into an idling operation of the engine, and determines, based on a speed signal R from a speed sensor, whether the number of revolutions per minute of the engine R is equal to or less than a predetermined reference value Rk.

Abstract: An engine control apparatus and method can prevent hunting during engine deceleration in a reliable manner, thereby improving the driving sensation or comfort of the driver of a vehicle. An air/fuel mixture is supplied to engine cylinders through an intake passage with a throttle valve disposed therein, and a bypass passage with an air valve disposed therein is connected with the intake passage for bypassing the throttle valve to supply auxiliary air to the cylinders.

Abstract: The invention is directed to a method for adjusting the idle air actuator in the intake system of an internal combustion engine during idle or overrun operation, the method comprising the steps of: transferring the idle air actuator into a non-driven position in a load area outside the idle or overrun operation; continuously monitoring outside of idle and overrun operation as to whether such a change of operating variables takes place which makes a transfer into idle or overrun operation probable; and, if so, driving the idle air actuator with a value which is determined so that the idle air actuator assumes that position, which, when reaching idle or overrun operation, will presumably by substantially the correct position.

Abstract: An engine speed control apparatus including an air control valve which controls the cross-sectional area of a bypass passage provided so as to bypass the throttle valve of the engine. The apparatus also includes a control unit which controls a degree of opening of the air control valve on the basis of a synthesized quantity which is obtained by synthesizing a basic air quantity for maintaining a target engine speed and an engine speed feed-back correction quantity which effects to eliminate an error between the target speed and an actual engine speed. An atmosphere pressure sensor is used to detect an atmospheric pressure, and a correction circuit is used to ensure that the synthesized quantity corresponds with the detected atmospheric pressure the engine is started.

Abstract: A method is described for increasing engine braking, when a crankcase scavenged two-stroke engine is operated in a deceleration fuel cut-off mode. In response to the detection of operating conditions indicating engine operation in the deceleration fuel cut-off mode, the quantity of air inducted into the engine is decreased, for a predetermined period of time. After this period of time elapses, the quantity of air inducted into the engine is then increased. This is preferably accomplished by regulating the degree of opening of a throttle valve disposed within the engine air intake system. The initial closing of the throttle valve restricts air flow through the engine for a predetermined time, to maintain efficient catalyst operating temperatures in the engine exhaust system. During extended operation in the deceleration fuel cut-off mode, the throttle valve is opened, after the lapse of the predetermined time, to increase the quantity of air inducted by the engine.

Abstract: An engine brake system for use in all types of diesel and gasoline engines, comprising a control means disposed, in the main embodiment of the invention, on the top of the line of valve rocker arms, seated on the supports of the rocker arms, and a dislodgement valve installed in the intake manifold of the engine, the valve remaining closed until the brake system is applied. An actuating device acts when the brake is applied, longitudinally displacing the control means, whereby the rocker arms of the exhaust valves are uncoupled from the corresponding tappet rods thereby impeding the exhaust valves to open, whereby the gases trapped in the cylinders put up resistance to the ascending movement of the pistons in their exhaust stroke. The discharge of the gases toward the environment, via the dislodgement valve, occurs when the opening of the intake valves begins at the start of the intake stroke of the pistons.

Abstract: An air intake quantity controller for an engine having a control unit for effecting control such that the quantity of auxiliary air is increased to cope with a decelerating condition that occurs when a throttle valve is changed from an open state to a closed state. The control unit inhibits the control operation of increasing the quantity of auxiliary air if either an engine parameter which is proportional to the load on the engine or the engine load is not greater than a predetermined quantity when the throttle valve is in an open state. Thus, when the change in the engine load is relatively small at the time when the throttle valve shifts from an open state to a closed state, the control unit inhibits the control operation of increasing the quantity of auxiliary air, thereby preventing an unnecessary rise in the engine speed.

Abstract: A method and apparatus for controlling the air intake rate of an internal combustion engine, which internal combustion engine includes a deceleration control system responsive to actuation of an idle switch during deceleration for bypassing an intake throttle valve and feeding bypass air into the engine. The control device actuates the deceleration control system only when (1) the cooling water temperature of the engine is greater than or equal to a predetermined water temperature, (2) the engine is decelerating, (3) the engine speed is less than or equal to an actuation speed associated with the deceleration control system, and (4) the engine speed is changing at a rate which is greater than or equal to an actuation differential change rate associated with the deceleration control system.

Abstract: An auxiliary air amount control system for an internal combustion engine has an auxiliary air passage bypassing a throttle valve arranged within the intake pipe of the engine, and a control valve controlling the amount of auxiliary air supplied to the engine through the auxiliary air passage by varying the opening of the passage. The opening of the control valve is set in response to the opening of the throttle valve, and is decreased progressively from the set value as an initial value when the engine is in a predetermined decelerating condition. The set control valve opening is varied to a larger value as the reduction ratio assumed by a transmission connected to the engine is larger. The minimum value of the throttle valve opening at which the control valve opening can be set to a value larger than zero is varied to a smaller value as the reduction ratio is larger. The rate at which the control valve opening is progressively decreased is varied to a smaller value as the reduction ratio is larger.

Abstract: An intake air flow control apparatus for an internal-combustion engine, which includes a valve lift characteristic control means for variable control of the lift characteristics of intake and exhaust valves for the internal-combustion engine and a deceleration intake control means for controlling the quantity of intake air to be supplied to the downstream side of the intake throttle valve during the deceleration operation of the engine, comprises an intake control characteristic change means for changing the control characteristics of the deceleration intake control means in response to the valve lift characteristic control.

Abstract: A method for controlling the air-fuel ratio in internal combustion engines, in which a low and/or decelerating engine speed is detected according to a change speed of engine operation parameters and the degree of opening of a flow regulating valve is controlled according to such change speed when deceleration is detected.

Abstract: An air and fuel mixing, modulating and supply means for a spark ignition internal combustion engine includes an air inlet manifold in effective connection with air and fuel metering means including a throttle. Two separate passages are provided which passages include holes in the inlet manifold. Each passage is controlled by a respective valve. Control means open or close the valves depending on engine condition. The first larger passage is effective to reduce engine vacuum when the engine speed is greater than a 1,000 rpm and the throttle is closed. The second smaller passage is effective to allow a small amount of additional air into the inlet manifold when the throttle is open and the engine speed is above 1,500 rpm.

Abstract: A fuel control system for providing a dashpot operation at release of an accelerator pedal of a motor vehicle. A bypass is provided around a throttle valve of an engine and an idle speed control valve is provided in the bypass, for controlling air passing in the bypass. When the accelerator pedal of the motor vehicle is released, an idle signal is produced. In response to the idle signal, idle speed control valve is gradually closed. After a set time, fuel supply by a fuel injector is cut off.

Abstract: A deceleration control device of an engine comprising an intake passage which has a throttle valve therein. A bypass passage is branched from intake passage upstream of the throttle valve and is connected to the intake passage downstream of the throttle valve. A flow control valve is arranged in the bypass passage. At the time of deceleration, when the supply of fuel is cut, the flow control valve opens to increase the flow area of the bypass passage by a predetermined flow area.