Abstract: Systems and methods for determining which of an intake valve and an exhaust valve is to be deactivated first when an engine is operated in a variable displacement mode. In one example, an exhaust valve of the cylinder is deactivated before an intake valve of the cylinder when the engine is operated in a static variable displacement operating mode.

Abstract: Disclosed is a method for detecting physical stoppage of an internal combustion engine, including: at least four cylinders, a set of cylinder pressure sensors, configured such that, over the course of a combustion cycle of the engine, there is at least one cylinder in the compression or expansion phase whose pressure is measured by a pressure sensor of the set, the method including the following steps: measuring the pressure in a cylinder in the compression or expansion phase, calculating, from the pressure measured in the cylinder, a ratio between a pressure variation in the cylinder and the pressure in the cylinder, and detecting a physical stoppage of the engine if the measured pressure is decreasing and if the calculated ratio is constant.

Abstract: Methods and systems for operating an engine that includes adjustable poppet valve timing and an exhaust gas recirculation valve are described. In one example, the exhaust gas recirculation valve is opened and the timing of the poppet valves is retarded so that an amount of fresh air that is pumped by the engine to an after treatment device may be reduced.

Abstract: A precombustion chamber gas engine including a precombustion chamber communicating with a main combustion chamber includes: a precombustion-chamber-fuel supply line through which a precombustion chamber fuel flows; a precombustion-chamber-fuel supply valve connected to the precombustion-chamber-fuel supply line and controlling supply of the precombustion chamber fuel to the precombustion chamber, the precombustion-chamber-fuel supply valve being configured to open when a precombustion chamber fuel line pressure, which is a pressure of the precombustion-chamber-fuel supply line, is larger than a precombustion chamber pressure, which is a pressure of the precombustion chamber; a precombustion-chamber-fuel-line-pressure adjustment valve disposed on the precombustion-chamber-fuel supply line and capable of adjusting the precombustion chamber fuel line pressure; an exhaust-precombustion-chamber-pressure acquisition unit capable of obtaining an exhaust precombustion chamber pressure which is a pressure related to t

Abstract: Methods and systems are provided for reducing fouling of a spark plug in a cylinder of a variable displacement engine configured to propel a vehicle. In one example, a method includes in response to deactivation of a cylinder or cylinders of the engine, providing spark to the cylinder or cylinders at a predefined position of a piston or pistons coupled to the cylinder or cylinders, respectively, where the predefined position comprises the piston or pistons being within a threshold of a bottom dead center position. In this way, spark plug fouling may be reduced or eliminated during conditions of cylinder deactivation.

Abstract: Systems and methods for improving operation of an engine are presented. In one example, a position of a throttle is adjusted along with other actuators to improve engine starting.

Abstract: The present disclosure relates to an improved internal combustion engine including a cylindrical cylinder, on either side a cylinder head is emplaced and a reciprocating piston and oil reserve tank is also located in the piston for lubricating the cylinder and it has two series of fire, compression and oil rings, located on two sides of the piston in order to seal the cylinder housing. The improved engine provides more compaction, discharge and better breath in comparison with common engines; wherein air is compressed into the cylinder and smoke exits from the cylinder speedily. The improved engine has a significant impact on fuel saving. In addition, smoke and air filters are emplaced on the valves which will produce less emissions compared with the similar engines. In comparison with similar engines in double-ended combustion engines, the fuel consumed is cut by 50% or cut by 25%. in single combustion engines.

Abstract: One embodiment is a unique strategy for raising exhaust temperatures which includes deactivating a first group of cylinders while maintaining a second group of cylinders in a combustion mode and injecting fuel into each of one of the second group of cylinders not earlier than 2 degrees before top dead center (TDC). The strategy also includes passing fuel rich exhaust from the second group of cylinders into an exhaust pathway and oxidizing at least a portion of the fuel rich exhaust in the exhaust pathway. In one form, the oxidizing occurs independent of any catalytic influence. Other embodiments include unique methods, systems, and apparatus for raising exhaust temperatures and/or regenerating one or more components of an aftertreatment system. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.

Abstract: A controller for a gas engine includes a cycle detection unit 67 configured to detect a crank angle period of a single combustion cycle of an engine including a plurality of cylinders based on a crank angle detection value inputted from a crank angle detector 75, a misfire detection unit 69 configured to detect a misfire in a combustion chamber 37 based on an in-cylinder pressure detection value inputted from the in-cylinder pressure detector 59, and a simultaneous misfire determination unit 73 configured to determine a simultaneous misfire of more than one cylinder when a total number of cylinders where the misfire is detected in the single combustion cycle by the misfire detection unit 69 is not less than a preset threshold value of a cylinder number. The fuel gas to all of the cylinders is shut of when the simultaneous misfire of more than one cylinder in the single combustion cycle is determined by the simultaneous misfire determination unit 73.

Abstract: A method for monitoring an exhaust gas sensor coupled in an engine exhaust is provided. In one embodiment, the method comprises indicating exhaust gas sensor degradation based on a time delay and line length of each sample of a set of exhaust gas sensor responses collected during a commanded change in air-fuel ratio. In this way, the exhaust gas sensor may be monitored utilizing robust parameters in a non-intrusive manner.

Abstract: When an accelerator pedal is released while a vehicle is running, a lockup clutch is unlocked. Simultaneously, ignition timing is retarded and a fuel-cut operation to stop fuel supply to an internal combustion engine is performed. However, when it is predicted that a fuel recovery is to be performed after unlocking the lockup clutch, execution of the fuel-cut operation is prohibited. A shock due to the fuel recovery after the fuel-cut operation performed when the accelerator pedal is released is thereby prevented.

Abstract: An emission control system for an engine includes a catalyst and an exhaust-gas sensor provided downstream of the catalyst in a flow direction of exhaust gas. The exhaust-gas sensor includes a sensor element that includes a pair of electrodes and a solid electrolyte body located between the electrodes. The emission control system further includes a constant current supply portion that changes an output characteristic of the exhaust-gas sensor by applying a constant current between the electrodes, a rich direction control portion that performs a rich direction control after a fuelling-stop control, and a characteristic control portion that performs a rich responsiveness control during the rich direction control. In the rich direction control, an air-fuel ratio of the exhaust gas is made to be richer. In the rich responsiveness control, the constant current supply portion increases a detection responsiveness of the exhaust-gas sensor with respect to rich gas.

Abstract: A combination lever for a carburetor is an integrated shutoff lever and fuel valve. The combination lever includes a longitudinal portion for a handle and a cylindrical portion including a fuel path for the fuel valve. A carburetor casing is shaped to form a valve chamber and a carburetor chamber. The valve chamber supports the cylindrical portion. A directional cavity formed in the cylindrical portion of the combination lever regulates a flow of fuel to the carburetor chamber according to a rotation of the combination lever. At one position the directional cavity opens the fuel path so that fuel flows into the carburetor chamber. At another position the directional cavity closes the fuel path so that the flow of fuel is blocked. The combination lever may also include an abutment portion to engage a switch for completing an electrical shutoff path to an engine coupled to the carburetor.

Abstract: The objective of the present invention is to prevent an increase in the amount of oxygen stored in a catalyst due to a fuel cut by performing a rich spike, even when the fuel is again supplied after a fuel cut in some of the cylinders. When a prescribed fuel cut condition has been satisfied (t1, t6), first, the fuel to some of the cylinders is cut, and after a prescribed period of time (A1) has elapsed, the supply of fuel to all of the cylinders is cut (A2). When the fuel to only some of the cylinders has been cut and a prescribed fuel cut recovery condition has been satisfied (t3), fuel is again supplied to the aforementioned cylinders, and during a prescribed period (C1) after the supply of the fuel has been restarted a rich spike (D1) is executed, whereby the amount of fuel being supplied is increased and the exhaust air-fuel ratio is controlled so as to be richer than the stoichiometric air-fuel ratio.

Abstract: An internal combustion engine is provided in which a prescribed amount of fuel is injected over a predetermined period until an air-fuel ratio sensor is activated when fuel cut control of the internal combustion engine is stopped to resume normal engine operation. If an EGR gas is inducted immediately before the fuel cut control is started, the prescribed amount is reduced.

Abstract: A system for a vehicle includes a trigger module, a fuel control module, and a cylinder control module. The trigger module generates a trigger when an engine speed is greater than a first predetermined speed. The first predetermined speed is greater than zero. The fuel control module cuts off fuel to cylinders of the engine in response to the generation of the trigger. The cylinder control module selectively disables opening of intake and exhaust valves of the cylinders in response to the generation of the trigger after the fuel is cut off.

Abstract: A control for an internal combustion engine having a fuel injection valve for directly injecting fuel to a combustion chamber of the engine, an ignition device for burning an air-fuel mixture containing the fuel injected from the fuel injection valve, and a variable cylinder management mechanism that is capable of changing the number of operating cylinders is provided. The control includes making a transition to an operating mode where the number of operating cylinders is decreased through the variable cylinder management mechanism. It is predicted based on an operating condition of the engine that an air-fuel ratio of an exhaust atmosphere of the engine becomes lean due to a stop of the fuel injection into one or more cylinders to be halted by the transition.

Abstract: A process and system are provided for determining fuel consumption of a motor vehicle. A first mean fuel consumption, which cannot be reset under a user's influence, is determined. A second mean fuel consumption, which can be reset under a user's influence, is determined as a function of several measured values. A third mean fuel consumption is determined as follows: (a) at the beginning of a predefined time period, which starts with a resetting of the second mean fuel consumption, the third mean fuel consumption is set to be equal to the first mean fuel consumption; (b) between the beginning and the end of the predefined time period, the third mean fuel consumption is set to be a weighted mean of the first mean fuel consumption and the second mean fuel consumption; and, (c) starting at an end of the predefined time period, the third mean fuel consumption is set to be equal to the second mean fuel consumption. A signal indicative of the third mean fuel consumption is provided.

Abstract: In one exemplary embodiment of the invention a method for controlling a speed of an internal combustion engine includes shutting off fuel flow into a cylinder to reduce the speed of the internal combustion engine. The method also includes providing an electrical load to an alternator of the internal combustion engine, further reducing the speed of the internal combustion engine.

Abstract: A control method and a control system for deceleration of a vehicle including a continuous valve lift apparatus (CVVL) may include determining whether fuel cutting condition is satisfied, determining whether brake pedal input signal is detected and controlling deceleration according to brake pedal input signal by at least one of controlling throttle opening angle and controlling valve lift of the CVVL.

Abstract: Disclosed are an apparatus and a method for processing a fuel cut starting or releasing the fuel cut using a tilt angle of a vehicle or a clearance angle of an acceleration pedal. An exemplary embodiment of the present invention can reflect driving habit or acceleration intention of a driver by interlocking a clearance angle of the acceleration pedal in addition to starting or releasing a fuel cut according to a tilt angle of a vehicle, thereby increasing fuel efficiency driving or convenience of driving. The exemplary embodiment of the present invention can improve stability of driving by applying a haptic technology.

Abstract: The automobile emergency stop system includes a knife switch that is wired to one of the wires running to a fuel pump of a vehicle. The system is designed for use with a parking brake such that upon breaking the circuit, electrical flow to the fuel pump ceases and the engine stops. The system is designed to close the circuit when the parking brake is not lifted. The system is adapted for all types of parking brakes, and includes hand actuated or foot actuated parking brakes. The system is designed for use as an anti-theft measure as well as a safety measure for a computer controlled engine that faults and accelerates out of control.

Abstract: An engine control system comprises an engine speed monitoring module and a pump control module. The engine speed monitoring module compares an engine speed and a predetermined threshold. The pump control module deactivates a pressure pump based on said comparison.

Abstract: The present invention provides a vehicle wheel spin control apparatus that, when it is determined that a wheel spin occurs, reduces engine torque to prevent the wheel spin, including: detecting driving control information and information on the state of a vehicle and determining whether basic conditions required to perform engine torque limit control to prevent the wheel spin are satisfied; when the basic conditions are satisfied, calculating a speed variation and the speed gradient value, and comparing the speed gradient value with a predetermined speed gradient value to determine whether a spin occurs; when it is determined that the spin occurs, using a torque gradient map set according to the current engine torque to perform the engine torque limit control; and when the vehicle speed is reduced by the engine torque limit control and cancellation conditions are satisfied, canceling the engine torque limit control and returning to normal control.

Abstract: The present disclosure relates to a computer-implemented method of controlling an engine fuel pump in a hybrid-electric vehicle. The method includes: cycling a vehicle powertrain between an electric mode, where an engine is commanded off, and a mechanical mode, where the engine is commanded on; depowering an engine fuel pump when the engine is commanded off; and determining if the engine is operating in a fuel shut-off mode.

Abstract: The present invention relates to an actuating device for a soil compaction device with an internal combustion engine, such as a vibration tamper, for joint actuation of an engine stop switch and a tank shut-off valve. It is provided that the actuating device comprises one single movable actuating means or element for the direct joint actuating of the engine stop switch and the tank shut-off valve. The invention further relates to a soil compaction device with such an actuating device.

Abstract: A high-pressure pump (50) is provided which is drivingly connected to an engine output shaft (1) and delivers fuel to an injector (4) through a delivery pipe (5) based on the rotation of the output shaft (1). The high-pressure pump (50) includes an electromagnetic valve (50b) that adjusts, based on the engine operating state, a fuel delivery amount within an adjustable range that changes according to a rotation speed of the engine output shaft (1). When an abnormality is detected in the electromagnetic valve (50b), the rotation speed of the engine output shaft (1) is restricted to equal to or less than a reference engine speed (NT).

Abstract: An engine control system comprises a clutch cut off enable module and a torque control module. The clutch cut off enable module generates an enable signal based on a clutch engagement signal and an accelerator pedal signal. The torque control module reduces a spark advance of an engine to a minimum value and disables fueling of cylinders of the engine based on the enable signal. The minimum value is a minimum allowed spark advance for current engine airflow.

Abstract: An engine control system comprises a base air per cylinder (APC) module, a catalyst temperature adjustment module, an ambient temperature adjustment module, and an APC adjustment module. The base APC module determines a base APC to reduce first engine pumping losses during a first deceleration fuel cutoff (DFCO) event relative to second engine pumping losses during a second DFCO event. The catalyst temperature adjustment module determines a catalyst temperature adjustment based on a catalyst temperature during the first DFCO event. The ambient temperature adjustment module determines an ambient temperature adjustment based on an ambient air temperature during the first DFCO event. The APC adjustment module selectively adjusts the base APC based on the catalyst temperature adjustment and the ambient temperature adjustment and controls at least one of the engine airflow actuators based on the adjusted base APC during the first DFCO event.

Abstract: An engine control system comprises a base air per cylinder (APC) module, a catalyst temperature adjustment module, an ambient temperature adjustment module, and an APC adjustment module. The base APC module determines a base APC to reduce first engine pumping losses during a first deceleration fuel cutoff (DFCO) event relative to second engine pumping losses during a second DFCO event. The catalyst temperature adjustment module determines a catalyst temperature adjustment based on a catalyst temperature during the first DFCO event. The ambient temperature adjustment module determines an ambient temperature adjustment based on an ambient air temperature during the first DFCO event. The APC adjustment module selectively adjusts the base APC based on the catalyst temperature adjustment and the ambient temperature adjustment and controls at least one of the engine airflow actuators based on the adjusted base APC during the first DFCO event.

Abstract: In a method for controlling an engine braking device of an internal combustion engine of a motor vehicle during an up-shift process of a transmission device connected to the internal combustion engine which includes a first cylinder bank and a second cylinder bank, an engine braking device acting on individual cylinder banks, a fuel supply device acting on individual cylinder banks and a shiftable transmission device, which comprises shiftable gearwheels and an input shaft which can be coupled to a crankshaft of the internal combustion engine by means of a clutch are provided and used during up-shifting to manipulate braking and powering up the cylinder banks and disengaging and up-shifting the transmission for a fast and smooth gear change operations.

Abstract: Various systems and methods are described for operating an engine in a vehicle in response to fuel having varying amounts of alcohol. One example method comprises delivering fuel to the engine, limiting engine speed during vehicle operation to a maximum permitted engine speed, the maximum permitted engine speed responsive to the amount of alcohol in the fuel.

Abstract: An engine control system comprises an engine speed monitoring module and a pump control module. The engine speed monitoring module compares an engine speed and a predetermined threshold. The pump control module deactivates a pressure pump based on said comparison.

Abstract: The rack includes a main section including a primary platform area and a secondary platform area. The primary platform area includes a plurality of elongated support bars and at least one cross member provided across a portion of the primary platform area to provide strength. An auxiliary section has an auxiliary platform area and is adapted to be slidably received by the main section to move between a retracted position and an extended position. The auxiliary platform is adapted to support various items independent of whether it is in retracted position or the extended position. In one example, the auxiliary section is adapted to be slidably received in a recessed area. In addition or alternatively, the auxiliary section is adapted to be removable from the main section.

Abstract: A method for controlling the speed of a vehicle, the method making it possible to maintain a predefined setpoint speed even on downhill grades. In the event that the actual speed of the vehicle exceeds the predefined setpoint speed by more than a first predefined speed difference, a service brake of the vehicle will be activated.

Abstract: An ECU determines the presence/absence of a fault of a negative pressure generation device that has an ejector that generates a negative pressure that is greater than the negative pressure that is to be extracted from an intake manifold of an internal combustion engine, and a VSV that causes the ejector to function or stop functioning. The ECU includes a presence/absence-of-abnormality determination portion that determines the presence/absence of an abnormality of the negative pressure generation device on the basis of variation of the rotation speed Ne of the internal combustion engine in accordance with change in the state of operation of the VSV.

Abstract: A method of operating an engine having a plurality of cylinders, the method comprising of transitioning the engine from a first mode to a second mode, and temporarily adjusting an amount of torque produced by a cylinder of the engine for at least one cycle responsive to a difference in an amount of torque produced by a previous firing cylinder and a subsequent firing cylinder.

Abstract: A control device for a vehicle for cooperatively controlling the engagement of a lock-up clutch and the conditions of fuel cut. When the rotational speed of an input shaft of a transmission becomes greater than a predetermined value during deceleration running in the condition where a throttle valve is fully closed, the lock-up clutch is engaged. Thereafter, the fuel cut start engine speed increased by a predetermined value is changed to a normal fuel cut start engine speed, at which the fuel cut is started. Accordingly, engine brake can be produced at a lower vehicle speed as compared with the prior art.

Abstract: An integrative control method and device for controlling gas engines is proposed which is improved load responsivity of the engine in transient operation.

Abstract: During a fuel cut, a recommended reactivated cylinder and a reactivatable cylinder are determined based on the stopped positions of an intake valve and an exhaust valve (step 104). A fastest reactivatable cylinder is then determined based on the crank angle, from among the recommended reactivated cylinder and the reactivatable cylinder (step 108). Also, the rotating direction of a motor when a variable valve drive apparatus starts to be driven again when the fastest reactivatable cylinder is made the reactivated cylinder is also determined. When a reactivation command is output, operation resumes from the fastest reactivatable cylinder when the situation calls for rapid reactivation (step 124). When the situation does not call for rapid reactivation, operation resumes from the recommended reactivated cylinder (step 118).

Abstract: A vehicle control apparatus includes a first fuel-cut duration extending portion that, when a fuel-cut is being executed during deceleration of the vehicle, slows the decrease in the engine speed by executing a slip control of a lock-up clutch; and a second fuel-cut duration extending portion which, when the engine speed has decreased to a coast-downshift threshold, which is higher by a given amount than a fuel-cut cancellation threshold, while the slip control is being executed, allows to downshift the automatic transmission if the road on which the vehicle is presently traveling has a downhill gradient that is larger than a reference value.

Abstract: With reference to FIG. 1, the present invention provides an internal combustion engine (10) comprising a variable volume combustion chamber (13); an air intake system (18,20,21) for delivering charge air to the combustion chamber (13); an exhaust system (17) for relaying combusted gas from the combustion chamber (13) to atmosphere; and a fuel injection system (19, 21, 22, 23, 24, 25, 26) for delivering fuel into the charge air for combustion therewith in the combustion chamber (13). The fuel injection system (19,21,22,23,24,25,26) comprises a fuel injector (19) which functions as a positive displacement pump and dispenses an amount of fuel which is fixed for each and every operation of the injector (19); and a controller (23) which controls the operation of the fuel injector (19). In response to an increasing engine speed and/or load the controller (23) increases in amount the fuel delivered per engine cycle by increasing in number the occasions the fuel injector (19) is operated per engine cycle.

Abstract: A control device for a vehicle for cooperatively controlling the engagement of a lock-up clutch and the conditions of fuel cut. When the rotational speed of an input shaft of a transmission becomes greater than a predetermined value during deceleration running in the condition where a throttle valve is fully closed, the lock-up clutch is engaged. Thereafter, the fuel cut start engine speed increased by a predetermined value is changed to a normal fuel cut start engine speed, at which the fuel cut is started. Accordingly, engine brake can be produced at a lower vehicle speed as compared with the prior art.

Abstract: Fuel management system for operation of a spark ignition gasoline engine. The system includes a gasoline engine powering the vehicle and a source of gasoline for introduction into the engine. A source of an anti-knock fuel such as ethanol is provided. An injector directly injects the anti-knock fuel into a cylinder of the engine and the control system shuts down the engine by stopping gasoline and anti-knock agent flow into the engine during vehicle deceleration and idling and restarts the engine upon driver demand. Direct ethanol injection and engine shutdown results in efficiencies similar to those of full hybrid vehicles.

Abstract: A method of controlling an engine stop position in a hybrid electric vehicle having a motor capable of controlling engine speed is provided. The method includes: a) reducing the engine speed according to an first engine speed reduction rate using the motor in a state where fuel supplied to the engine is cut off; b) after the engine speed is reduced to first reference speed, adjusting an actual engine speed reduction rate according to second engine speed reduction rate using the motor, and monitoring a current crank position to count the number of times when the current crank position coincides with a given target engine stop position; and c) if the number of times is more than a predetermined number and if the actual engine speed is equal to or below second reference speed, stopping the engine using the motor when the current crank position coincides with the target engine stop position.

Abstract: A method for operating a drive unit, in which, given the use of a vehicle-speed controller, the actual speed is prevented from exceeding the setpoint speed too significantly. In the method, a setpoint value for an output variable of the drive unit is predetermined. An overrun fuel cutoff of the drive unit is enabled as soon as the setpoint value for the output variable falls below a characteristic value for the overrun fuel cutoff.

Abstract: An internal combustion engine may be provided with independently controllable valves, fuel injectors and ignition elements that may be used to start the engine without a separate auxiliary device such as an electric starter motor. The engine may fire the cylinders under a startup mode of control at the same time it fires the cylinders under a normal mode of control in order to smooth the transition from start up to normal operating mode. Additionally, an internal combustion engine may use independently controllable valves to stop the engine and ensure that one or more of the pistons come to rest at a position which allows them to be used to restart the engine.

Abstract: The present invention provides a fuel injection control device which can prevent the occurrence of a phenomenon that when a pressure of fuel in the inside of a pressure storage chamber is elevated during a fuel cut, and the injection of fuel is restarted, the fuel is injected at a high fuel pressure largely different from a target fuel pressure. Accordingly, the fuel injection control device can prevent the deterioration of an exhaust gas and the occurrence of an engine stop.

Abstract: A control system for an internal combustion engine having a plurality of cylinders and a switching mechanism for switching between an all-cylinder operation in which all of the cylinders is operated and a partial-cylinder operation in which at least one of the plurality of cylinders is halted. Operating parameters of a vehicle driven by the engine is detected. The all-cylinder operation or the partial-cylinder operation is performed according to the detected operating parameters. An oxygen concentration sensor is provided in an exhaust system corresponding to the at least one cylinder which is halted during the partial-cylinder operation. A failure of the oxygen concentration sensor is diagnosed in a predetermined operating condition including a fuel-cut operation of the engine upon deceleration. The partial-cylinder operation is permitted after completion of the failure diagnosis.

Abstract: A fuel cut control device that stops supply of fuel to an internal combustion engine during deceleration of the internal combustion engine having a throttle valve for each cylinder, which detects a maximum value of an intake pipe pressure during one combustion cycle of the internal combustion engine, starts fuel cut control when it is detected that the detected maximum value of the intake pipe pressure becomes less than a set fuel cut start determination value, and stop the fuel cut control when it is detected that the detected maximum value of the intake pipe pressure exceeds a fuel supply restart determination value set higher than the fuel cut start determination value to restart the supply of the fuel to the internal combustion engine.