Abstract: Methods and systems are provided for user controlled engine revving. In one example, the engine may be revved to a peak speed according to a target revving sequence in response to a user-initiated command. A revving sound may be provided in response to an input device, without demanding manual depression of an accelerator pedal.

Abstract: The method can include generating a first duty cycle value for the PWM; monitoring a current value of a parameter; generating a duty cycle limit value for the PWM, including activating more than one duty cycle limit functions based on corresponding activation conditions, the corresponding activation conditions based on the current value of the parameter, each of the more than one duty cycle limit functions generating a corresponding duty cycle limit subvalue when the corresponding activation conditions are met, and setting the duty cycle limit value to a sum of the generated duty cycle limit subvalues; setting a second duty cycle value for the PWM, as the first duty cycle value or as the duty cycle limit if the first duty cycle value exceeds the duty cycle limit; and, applying the PWM at the second duty cycle value to the valve.

Abstract: A control method, a control device, an electronic device and a storage medium for engine operation are provided. The method includes: obtaining a rotational speed and a temperature of an engine at a current time and determining a reference value of the control parameter of the engine based on the rotational speed and the temperature; detecting a composite operating state of the engine at the current time and determining an offset of the control parameter corresponding to each operating state in the composite operating state; adding the reference value of the control parameter and the offset of the control parameter corresponding to each operating state in the composite operating state to obtain a final value of the control parameter; and controlling the engine at the current time according to the final value of the control parameter.

Abstract: A system and method for controlling a hybrid vehicle having an engine, first and second electric machines coupled to a traction battery and configured to operate primarily as a motor and a generator, respectively, and a controller in communication with the engine and the first and second electric machines include increasing target engine speed from a sea level speed to deliver a demanded engine power at altitude up to an NVH engine speed limit. The system and method may reduce the demanded engine power based on an attainable engine power associated with the NVH engine speed limit. A demanded wheel power may be reduced in response to the reduced engine power.

Abstract: Provided is a boat engine idling revolution number control device, which includes a control unit (30) for performing control so that an engine revolution number converges to a target revolution number based on a result of detection of an engine state. The control unit includes: a decelerating running determining section (314); and a running-load correction calculating function section (315) for calculating a running-load correction signal for correcting a basic torque rate based on the result of determination by the decelerating running determining section and a shift position state detected by the neutral switch. The running-load correction calculating function section resets the running-load correction signal to zero when detecting, based on a behavior of the engine revolution number after the running-load correction, that the engine revolution number is larger than a threshold value calculated based on the target revolution number and the engine revolution number increases.

Abstract: A charge control device for a hybrid vehicle includes a driving battery supplying electric power to front and rear motors. It can switch between a normal power generation mode in which an engine is driven at a first rotational speed higher than an idling speed to generate electric power and charge the driving battery to a predetermined amount of charge, and a forced power generation mode in which the engine is forcedly driven at the first rotational speed or higher to generate electric power and charge the battery so as to maintain a higher amount of charge of the driving battery than a predetermined amount of charge, and drives the engine at an idling speed or lower to reduce an amount of electric power generation if the cooling water of the engine is a first predetermined temperature or higher when the forced power generation mode is performed.

Abstract: An engine control apparatus includes a control unit configured to perform a feedback control based on a second amount of intake air until a engine speed reaches a target idle speed. The engine control apparatus then regulates the amount of intake air to an amount smaller than a predetermined second amount of intake air for a predetermined period when the engine speed exceeds the target idle speed, and then performs a feedback control based on a first amount of intake air. Such engine control apparatus minimizes variation in engine speed by reducing a convergence time of the engine speed to a target idle speed in switching control of the amount of intake air in a case where engine friction at a low temperature is high.

Abstract: A snowmobile having an electronic oil pump fluidly connected to an oil tank thereof is disclosed. The electronic oil pump is fluidly connected to an engine of the snowmobile for delivering lubricant to the engine. An electronic control unit is electrically connected to the electronic oil pump for controlling actuation of the electronic oil pump. A method of operating an electronic oil pump is also disclosed.

Abstract: The control apparatus for a vehicle having a prime mover is applied to a vehicle having an air conditioning mechanism which performs the air conditioning in the vehicle interior by using the cooling water of the internal combustion engine. The engine stop permitting unit permits stopping the internal combustion engine based on the requested load of the internal combustion engine, when the cooling water temperature becomes equal to or higher than the engine stop permitting water temperature. The engine activating unit activates the internal combustion engine when the cooling water temperature becomes lower than the engine activation requesting water temperature, which is set to be lower than the engine stop permitting water temperature. The correcting unit corrects the engine stop permitting water temperature to be higher in the case that the vehicle speed is high, than in the case that the vehicle speed is low.

Abstract: In a hybrid vehicle 20, when an ECO switch 88 is turned off while an intermittent operation of an engine 22 is prohibited in response to a warm-up demand of the engine 22 according to a cooling water temperature Tw or a heating demand, the engine 22 is autonomously operated at a target rotational speed Ne* derived and set from a normal autonomous rotational speed setting map (Steps 170, S190). When the ECO switch 88 is turned on while the warm-up is demanded, the engine 22 is autonomously operated at the target rotational speed Ne* set based on an ECO mode autonomous rotational speed setting map so as to be not more than the value derived from the normal autonomous rotational speed setting map (Steps 180, S190).

Abstract: An internal combustion engine control apparatus executes an exhaust-valve-early-closing valve timing control in which an exhaust valve is closed before the intake stroke top dead center. The fuel injection timing mode is normally set to an intake-stroke non-synchronized fuel injection mode. However, if the internal combustion engine is idling and the combustion gas temperature is relatively high, the fuel injection timing mode is switched from the intake-stroke non-synchronized fuel injection mode to an intake-stroke synchronized fuel injection mode.

Abstract: An object to be achieved by the present invention is to achieve ignition timing that is suitable for an environment in which a spark ignition internal combustion engine is used during the period of starting of the internal combustion engine and warm-up thereof just after starting. To achieve this object, according to the present invention, in an ignition control system for an internal combustion engine in which, ignition timing is controlled by feedback in such a way that the engine rotation speed becomes equal to a target rotation speed when the temperature of the internal combustion engine is lower than a prescribed temperature, and retard control for retarding the ignition timing by a predetermined amount from target ignition timing is performed when the temperature of the internal combustion engine is equal to or higher than the prescribed temperature, the aforementioned prescribed temperature is changed according to the altitude of the place where the internal combustion engine is used.

Abstract: There is provided an idling rotation speed control apparatus that can reduce the development man-hours and the cost and that enables operation during a trolling cruise to be readily performed. The idling rotation speed control apparatus includes an engine rotation speed detection means, an engine temperature detection means, an engine idling driving state detection means, an engine load detection means, an intake air amount adjusting means for adjusting an amount of intake air during an idling state, and an ECU for controlling the intake air amount adjusting means during idling driving.

Abstract: A method of controlling heating while a vehicle is idling is disclosed. The method comprises: determining whether a state of readiness for idle heating exists; determining whether the vehicle is slopped; determining whether a temperature outside the vehicle reaches a winter temperature; and thereby operating an idle heating mode when all above criteria are met.

Abstract: An idling engine speed control system for a vehicle comprises a valve which is provided within an air-intake passage connected to an engine mounted in the vehicle and is configured to substantially open and close the air-intake passage, a drive device configured to open and close the valve, an opening degree controller configured to drive the drive device and is configured to control an opening degree of the air-intake passage, an input device which is attached to the vehicle and is configured to input a target engine speed in an idling state, and an engine speed memory configured to store the target engine speed input with the input device, wherein the opening degree controller is configured to control the opening degree of the air-intake passage in an idling state according to the target engine speed stored in the engine speed memory.

Abstract: An idle speed controller for an internal combustion engine provided with an intake variable valve timing mechanism for varying valve timing and a variable working angle for varying a valve working angle of an intake valve. The controller performs idle speed control. When an advancement failure occurs in the intake variable valve timing mechanism, the controller performs idle-up control to increase the target idle speed. When the valve working angle of the intake variable working angle mechanism is less than a predetermined value, the electronic control unit changes an increase amount of the target idle speed to a lower value if an advancement failure occurs when performing the idle-up as compared to when the valve working angle is greater than the predetermined value.

Abstract: An unstable idling state immediately after engine start is stabilized. The difference between a target idling engine speed corresponding to the cooling water temperature and an actual engine speed is integrated. The ignition timing is changed toward advance or retard while using a value obtained by multiplying the integration value of the engine speed difference with a gain, as an ignition timing changing amount. Immediately after engine start, the gain is made relatively large to rapidly increase engine speed. When the engine speed approaches the target engine speed, the gain is set to a smaller usual gain, and, in a change to the same advancing or retarding side, a change to an ignition timing in the same side is suppressed using a smaller advancing or retarding gain. In a throttle-off state, an ignition timing corresponding to the cooling water temperature is set to rapidly reduce engine speed.

Abstract: An engine fuel control device includes an idle speed control valve that is disposed in a bypass passage that bypasses a throttle valve, a starting phase determination means that determines whether the engine is in a pre-start phase or a post-start phase, a first opening setting means that sets the opening of the idle speed control valve before starting, a second opening setting means that sets the opening of the idle speed control valve after starting, and a target opening setting means that sets at least one target opening for the idle speed control valve opening when the engine shifts from the pre-start phase to the post-start phase. While the engine is being started, the fuel control device shifts the ISC valve opening from the opening before the complete explosion is determined to the target opening after the complete explosion and eventually to the opening after the complete explosion.

Abstract: An idle speed control system of an internal combustion engine controls a speed of the internal combustion engine during idling. In its attempt to shift the idle speed control after the internal combustion engine has been started from an open-loop control to a feedback control, the system brings an actual engine speed in the open-loop control to a target speed of the feedback control in a step-by-step manner. It can thus damp shock that occurs when the open-loop control is shifted to the feedback control after the internal combustion engine has been started.

Abstract: An engine fuel control device includes an idle speed control valve that is disposed in a bypass passage that bypasses a throttle valve, a starting phase determination means that determines whether the engine is in a pre-start phase or a post-start phase, a first opening setting means that sets the opening of the idle speed control valve before starting, a second opening setting means that sets the opening of the idle speed control valve after starting, and a target opening setting means that sets at least one target opening for the idle speed control valve opening when the engine shifts from the pre-start phase to the post-start phase. While the engine is being started, the fuel control device shifts the ISC valve opening from the opening before the complete explosion is determined to the target opening after the complete explosion and eventually to the opening after the complete explosion.

Abstract: A hot water type first idle control device includes a heating chamber through which cooling water for an engine is allowed to flow, a wax case heated by the heating chamber, and a device housing in which the wax case is accommodated and retained. In the hot water type first idle control device, the heating chamber is integrally defined in the device housing to adjoin the wax case with a partition wall interposed therebetween for separating the heating chamber from the inside of the device housing. Thus, it is possible to effectively heat the wax case by hot water, while preventing the entering of the hot water into the device housing.

Abstract: An engine idle control system includes an improved construction for changing an aimed idle engine speed, which is preset by the manufacturer therein, in response to various needs of a user. The engine has a main passage having a throttle valve therein and a bypass passage arranged to bypass the throttle valve. The bypass passage supplies an idle air charge to a combustion chamber of the engine when the throttle valve is generally closed and has an adjusting valve therein for adjusting the idle air charge. A control device controls the adjusting valve to reduce a difference between an actual idle speed sensed by an engine speed sensor and an aimed idle speed preset in the control device. The control device includes means for changing the aimed idle speed.

Abstract: The present invention provides a method for controlling idle speed of an engine in an engine idle control system including a battery voltage sensor, a coolant temperature sensor, a sensor for detecting an amount of alternator generation, an engine speed sensor, an ISC controlling an amount of air supplied to the engine in an idle state, and an ECU that is supplied with detected values from the sensors and outputs a control signal to the ISC based on the detected value being supplied, the method comprising the steps of:

Abstract: The present invention has an object to effectively prevent deterioration of combustion characteristics when engine temperature is low. There is provided an intake pressure controller 24 that effects control such that, when an operating condition discriminator 21 that identifies engine temperature identifies low engine temperature after engine start-up, control by an engine controller (feedback controller 23) that performs engine control on fluctuation of intake negative pressure to decrease the intake negative pressure is suppressed until the temperature of the intake passage rises to at or above a predetermined value, and such that the intake negative pressure is made larger.

Abstract: An idle speed control system of an internal combustion engine controls a speed of the internal combustion engine during idling. In its attempt to shift the idle speed control after the internal combustion engine has been started from an open-loop control to a feedback control, the system brings an actual engine speed in the open-loop control to a target speed of the feedback control in a step-by-step manner. It can thus damp shock that occurs when the open-loop control is shifted to the feedback control after the internal combustion engine has been started.

Abstract: An electronic engine control for reducing, and ideally eliminating, accumulation of products of incomplete combustion that result from cold ambient conditions acting on the engine and that otherwise might ultimately affect engine operation before the useful life of an engine has elapsed. An idle speed control has a first source providing a signal corresponding to ambient air temperature, a second source providing a signal corresponding to engine coolant temperature, a third source providing a signal indicating that an engine is running substantially in an idle condition, and a processor that processes the signals from the first source, the second source, and the third source to develop an idle speed control signal for controlling engine idle speed by regulating the engine coolant temperature to a defined coolant temperature when the engine is running in an idle condition and the ambient air temperature does not concurrently exceed a defined air temperature.

Abstract: A method for stabilizing the idle of an engine for a motor vehicle includes determining an engine rotational speed, modifying the engine rotational speed to define a friction engine speed, estimating a mechanical friction loss as a function of the friction engine speed, defining a torque request as a function of the mechanical friction loss and utilizing the torque request to control the engine at idle.