1922results about "Electrical automatic control" patented technology

An internal combustion engine, in which multiple kinds of fuels are fed to a cylinder from multiple fuel injectors each corresponding to each of multiple kinds of fuels at a target mixing ratio determined according to a running condition, includes an actual fuel mixing ratio calculator calculating an actual fuel mixing ratio of fuel fed to cylinder. The actual fuel mixing ratio calculator at first calculates actual fuel injection quantity of each fuel injection by adding or subtracting predetermined stuck-on-wall fuel to or from each quantity of fuel injected from each fuel injector, and then calculates an actual fuel mixing ratio of fuel fed to cylinder on the basis of the calculated actual fuel injection quantity of each fuel injector.

In various described embodiments skip fire control is used to deliver a desired engine output. A controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. In one aspect, the firing fraction is selected from a set of available firing fractions, with the set of available firing fractions varying as a function of engine speed such that more firing fractions are available at higher engine speeds than at lower engine speeds. The controller then direct firings in a skip fire manner that delivers the selected fraction of firings.

In various described embodiments skip fire control is used to deliver a desired engine output. A controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. In one aspect, the firing fraction is selected from a set of available firing fractions, with the set of available firing fractions varying as a function of engine speed such that more firing fractions are available at higher engine speeds than at lower engine speeds. The controller then direct firings in a skip fire manner that delivers the selected fraction of firings.

In an internal combustion engine equipped with an injector for oylinder-inside injection to inject fuel into a cylinder and an injector for intake port injection to inject fuel into an intake port, both the injectors being switched for use depending upon operating conditions, wherein when an operating condition range using either one of the first or the second injector is switched to an operating condition range using the other one thereof, the amount of fuel to be injected by the either one of the first or the second injector is gradually decreased and the amount of fuel to be injected by the other one is gradually increased over a predetermined period during the switching. Further, at the time of the switching, at least one of ignition timing and throttle opening angle is gradually varied.

In various described embodiments skip fire control is used to deliver a desired engine output. A controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. In one aspect, the skip fire controller is arranged to select a base firing fraction that has a repeating firing cycle length that will repeat at least a designated number of times per second at the current engine speed. Such an arrangement can be helpful in reducing the occurrence of undesirable vibrations.

A method is disclosed for controlling operation of an engine coupled to an exhaust treatment catalyst. Under predetermined conditions, the method operates an engine with a first group of cylinders combusting a lean air / fuel mixture and a second group of cylinders pumping air only (i.e., without fuel injection). In addition, the engine control method also provides the following features in combination with the above-described split air / lean mode: idle speed control, sensor diagnostics, air / fuel ratio control, adaptive learning, fuel vapor purging, catalyst temperature estimation, default operation, and exhaust gas and emission control device temperature control. In addition, the engine control method also changes to combusting in all cylinders under preselected operating conditions such as fuel vapor purging, manifold vacuum control, and purging of stored oxidants in an emission control device.

For an internal combustion engine including an in-cylinder injector and an intake port injector, proper ignition timing setting means is provided for setting a proper ignition timing according to the fuel injection ratio between injection from the in-cylinder injector and injection from the intake port injector. When a change is made in the fuel injection ratio, the proper ignition timing setting means selects one of a proper ignition timing value before the change and a proper ignition timing value after the change that is on the retard side and sets the ignition timing at the selected proper ignition timing value in at least a predetermined period of time after the change.

A system and method for enhanced combustion control in an internal combustion engine is disclosed. A fuel supply system has a fuel injector positioned to directly inject fuel into a combustion chamber, and it is capable of performing a split injection wherein a first fuel injection in each engine cycle precedes a second fuel injection that occurs during compression stroke in the same engine cycle. A spark plug produces a spark to ignite a first air / fuel mixture portion created due to the second fuel injection, initiating a first stage combustion. The first stage combustion raises temperature and pressure high enough to cause auto-ignition of a second air / fuel mixture portion surrounding the first air-fuel mixture portion, initiating a second stage combustion. An engine controller is programmed to perform control over initiation timing of the second stage combustion in response to at least one of the engine speed and load. This control is accomplished by varying at least one of a fuel injection timing of the first fuel injection, a fuel injection timing of the second fuel injection, spark timing, a proportion of fuel quantity of the second fuel injection to the total fuel injected in each engine cycle, and an EGR rate in response to at least one of engine speed and load.

Escape running performance at the time of the occurrence of an abnormality in an electronic throttle control system is improved. At the time of the occurrence of a severe abnormality, an abnormality storage element is operated, and an electric supply load relay of a throttle valve driving motor is de-energized to return a throttle valve to the default, and further, an alarm display is actuated, and an upper limit engine rotational speed is suppressed by control of a fuel injection valve, and escape running is carried out. As a suppression rotational speed, a lower limit threshold at a stop, a rotational speed substantially in proportion to the output of an accelerator position sensor, a rotational speed substantially in inverse proportion to the output of a throttle position sensor, or a default threshold rotational speed is selected, and multiple escape running can be carried out.

A fuel supply system has a fuel injector positioned to directly inject fuel into a combustion chamber, and it is capable of performing a split injection wherein a first fuel injection in each engine cycle precedes a second fuel injection that occurs during compression stroke in the same engine cycle. A spark plug produces a spark to ignite a first air / fuel mixture portion created due to the second fuel injection, initiating a first stage combustion. The first stage combustion raises temperature and pressure high enough to cause auto-ignition of a second air / fuel mixture portion surrounding the first air-fuel mixture portion, initiating a second stage combustion. This control is accomplished by varying at least one of a fuel injection timing of the first fuel injection, a fuel injection timing of the second fuel injection, spark timing, a proportion of fuel quantity of the second fuel injection to the total fuel injected in each engine cycle, and an EGR rate in response to at least one of engine speed and load.

An in-cylinder injection type spark-ignition internal combustion engine and a control method thereof realize a stabilized stratified-charge combustion by setting a large lift amount to an intake valve when the engine is cold-started and by executing a compression stroke injection. At this time, warming-up capability of a catalyst is improved by delaying an ignition timing.

A system for an engine of a vehicle, comprising of a combustion chamber, a delivery system configured to deliver a fuel and a fluid to the combustion chamber, an ignition system including a spark plug configured to deliver a spark to the combustion chamber, and a control system configured to respond to a change in a condition of the ignition system by varying at least one of an amount of the fuel and an amount of the fluid delivered to the combustion chamber to vary a ratio of the fluid and the fuel.

A method is disclosed for controlling operation of an engine coupled to an exhaust treatment catalyst. Under predetermined conditions, such as after an engine cold start, the method operates an engine with a first group of cylinders having a first ignition timing, and a second group of cylinders having a second ignition timing more retarded than the first group. In addition, the engine control method also provides the following features in combination with the above-described split air / lean mode: idle speed control, sensor diagnostics, air / fuel ratio control, adaptive learning, fuel vapor purging, catalyst temperature estimation, default operation, and exhaust gas and emission control device temperature control. In addition, the engine control method also can change to combusting all cylinders at substantially the same ignition timing under preselected operating conditions such as fuel vapor purging, manifold vacuum control, and purging of stored oxidants in an emission control device.

In an automatic stop device that automatically stops the operation of an internal combustion engine after a predetermined automatic stop condition is satisfied, a load acting on the engine is removed when the automatic stop condition is satisfied. When the automatic stop condition is satisfied, the between the magnitude of the load on the internal combustion engine before and after of the automatic stop condition is satisfied is determined, and an ignition timing retard amount of an ignition plug is decided such that the retard amount is increased as the difference becomes greater. The ignition timing is retarded by the retard amount substantially at the same moment as the load removing operation before the automatic stop control is initiated.

A variety of methods and arrangements for controlling the operation of an internal combustion engine in a skip fire variable displacement mode are described. In one aspect, the working chamber firing that are selected to deliver the desired engine output are determined at least in part based on torque feedback. The torque feedback may be an indication of the torque output of the engine or the torque experienced at some other location in the drive train. In some embodiments, the torque feedback signal is filtered to remove high frequency components of the torque feedback signal in order to help stabilize the system. In another aspect, other operational parameters are used as feedback in the determination of the firing sequence. In yet another aspect, a filter is arranged to filter a feedback signal to provide a filtered feedback signal that is used in the determination of the working chamber firings.

A method for operating at least an intake and exhaust valve in a cylinder with a piston of an engine in a vehicle, comprising during conditions of an engine shut-down, maintaining at least one of the intake and exhaust valves in a closed position, and during conditions where said at least one valve is in said closed position operating with the other of the intake and exhaust valve open, then closing the other of the intake and exhaust valve, and then opening the other of the intake and exhaust valve to generate braking torque to slow the engine.

A control apparatus stops supply of a fuel to an engine (a) when a value of a parameter relating to a misfire of the engine satisfies a misfire condition that is set based on an octane value of the fuel, or (b) when it is determined that a misfire may occur if an increased amount of the fuel is supplied to the engine in the case where ignition timing of the engine is retarded based on an octane value of the fuel, and the amount of the fuel is increased according to a retard amount of the ignition timing.

An engine starting device including: a battery capacity monitoring portion that estimates a remaining capacity of a battery; a start time starter driving portion that supplies a driving current from the battery to a starter generator for causing cranking of the engine when a start mode of the engine is a normal start mode; and a display portion that displays that the cranking for starting the engine is to be performed by a manual starter when the estimated remaining capacity of the battery is insufficient, wherein the driving of the starter generator is prohibited and the start mode of the engine is switched to the manual start mode when the estimated remaining capacity of the battery is insufficient.

Methods are provided for controlling the fueling of a motor vehicle and specifically for controlling the cut off of fueling of a hybrid electric motor vehicle during deceleration of that motor vehicle. In a hybrid electric motor vehicle having an internal combustion engine, a motor / generator, and a continuously variable transmission, one embodiment of the method comprises the steps of sensing throttle position of the internal combustion engine and slewing the continuously variable transmission to a higher gear ratio in response to sensing a closed throttle position. The method further comprises the steps of, cutting fueling of the internal combustion engine during the deceleration, and coupling the motor / generator in parallel with the internal combustion engine with the motor / generator operating as a generator.

A vehicular ejector system having an ejector that generates a negative pressure that is greater than the intake manifold negative pressure that is to be extracted from an intake manifold, a VSV that causes the ejector to function or stop functioning, and an ECU that controls the VSV. The ECU includes a control device that controls the VSV so as to cause the ejector to function if an ISC request amount for controlling, during idling, a throttle valve that adjusts the intake air flow amount supplied to the internal combustion engine is greater than a predetermined amount.

A method is disclosed for controlling operation of an engine coupled to an exhaust treatment catalyst. Under predetermined conditions, the method operates an engine with a first group of cylinders combusting a lean air / fuel mixture and a second group of cylinders pumping air only (i.e., without fuel injection). In addition, the engine control method also provides the following features in combination with the above-described split air / lean mode: idle speed control, sensor diagnostics, air / fuel ratio control, adaptive learning, fuel vapor purging, catalyst temperature estimation, default operation, and exhaust gas and emission control device temperature control. In addition, the engine control method also changes to combusting in all cylinders under preselected operating conditions such as fuel vapor purging, manifold vacuum control, and purging of stored oxidants in an emission control device.

Methods are provided for controlling the fueling of a motor vehicle and specifically for controlling the cut off of fueling of a hybrid electric motor vehicle during deceleration of that motor vehicle. In a hybrid electric motor vehicle having an internal combustion engine, a motor / generator, and a continuously variable transmission, one embodiment of the method comprises the steps of sensing throttle position of the internal combustion engine and slewing the continuously variable transmission to a higher gear ratio in response to sensing a closed throttle position. The method further comprises the steps of cutting fueling of the internal combustion engine during the deceleration, and coupling the motor / generator in parallel with the internal combustion engine with the motor / generator operating as a generator.

A random number generation device including a first random number generation part which generates a new random number based on a random number which was previously generated and which outputs the random number generated by the first random number generation part, the random number generation device includes: a second random number generation part which generates a random number different from the random number generated by the first random number generation part; and an operation part which outputs a random number obtained by a prescribed operation using a random number generated by the second random number generation part on a random number generated by the first random number generation part when generating a first random number after start of supplying electric power.

The present method and apparatus employ a signal indicative of cylinder pressure within the combustion chamber of an internal combustion engine to control combustion phasing or start of combustion (SOC) in subsequent cycles of the engine where the engine is driven by combustion of both a fuel / air premixed charge and a directly injected quantity of fuel. A ratio of signals indicative of pre-combustion pressure and post-combustion pressure within a cycle are employed to estimate SOC and then, based on a predetermined target SOC, an ignition lever is employed to adjust subsequent SOC. A preferred ignition lever is, in a pilot fuel ignited engine, pilot fuel quantity.

An automotive automatic transmission control apparatus is provided which works to increase the power of an engine in response to a request to down-shift the gear of an automatic transmission for developing the engine braking. The control apparatus includes a fail-safe circuit working to stop increasing the power of the engine when a defect in operation of a transmission hydraulic control circuit is detected after the hydraulic control circuit starts to control the hydraulic pressures to achieve the downshift of the automatic transmission. This eliminates or alleviates a problem, such as unwanted acceleration of the vehicle during the control of the downshift in the transmission.

This invention is intended to ensure that a control device for a vehicle drive unit is capable of realizing desired torque by making the main-actuator and sub-actuator collaborate adequately while holding the interposition of the sub-actuator as low as possible. For this end, a future target of torque that is going to be output from the engine and a realization timing of the future target are taken as reservation information for reserving engine torque regulation. Next, the required period, which is required to realize the future target when a main-actuator (a throttle) is operated to regulate the torque, is computed from a current engine operating condition. Then, the operation of the main-actuator is started at the timing preceding the realization timing by the required period for realizing the future target. In parallel with that, a sub-actuator (an ignition system) is operated to cancel out a torque change induced by the operation of the main-actuator during the period from the start timing of the operation of the main-actuator to the realization timing.