Abstract: Methods, systems, and computer readable storage media are provided for operating a vehicle including an engine that may be automatically shutdown in response to AESS conditions. In one example, the method comprises, determining an AESS emission credit corresponding to an amount of AESS operation; and adjusting an engine operating parameter based on the determined AESS emission credit. Further, in another example, the method comprises retarding injection timing in response to manifold air temperature, wherein an amount of retard is adjusted responsive to an amount of AESS operation.

Abstract: An engine system includes a stop-start module that generates a shut down signal to shut down an engine. A friction module that generates a friction signal based on the engine shut down signal. The friction signal indicates an estimate of a sum of friction forces between components of the engine. A position module estimates a position of the engine and generates a position signal. An energy module estimates kinetic energy of the engine based on the friction signal and the position signal. A cylinder deactivation module stops the engine based on the kinetic energy in at least one of (i) a predetermined position and (ii) a predetermined range.

Abstract: A roadside communicator in a roadside around an intersection transmits, to vehicles around the intersection, traffic light information on traffic light at the intersection and mobile object information on vehicles and pedestrians around the intersection. An in-vehicle communicator mounted in a subject vehicle acquires the traffic light information and the mobile object information. An in-vehicle engine start determination section mounted in the subject vehicle determines a permission or prohibition of a start of an engine of the subject vehicle based on the traffic light information and mobile object information. The engine start determination section determines an engine start time in consideration of a display of the traffic light, and states of mobile objects that pass through the intersection. An in-vehicle engine control section in the subject vehicle starts the engine when the engine start determination section permits the start of the engine.

Abstract: An engine starter controller for a vehicle equipped with an idle-stop controller includes a user-start circuit, an auto-start circuit, a switch, and a failure detector. The user-start circuit energizes a starter when a driver starts an engine. The auto-start circuit energizes the starter when the idle-stop controller automatically restarts the engine. The switch circuit switches an energization circuit for energizing the starter from the user-start circuit to the auto-start circuit after the user-start circuit starts to energize the starter by causing the auto-start circuit to energize the starter and by putting the user-start circuit into a forced state where the user-start circuit is forced to stop energizing the starter. The failure detector determines whether the auto-start circuit energizes the starter when the energization circuit is switched to the auto-start circuit.

Abstract: An ECM 2 performs an idle-stop operation on a vehicle internal combustion engine 4 in an idle operation state. The ECM 2 is supplied with power from a battery 3. The ECM 2 restarts the internal combustion engine 4 upon request by supplying power from the battery 3 to the starter motor 5. The ECM 2 is programmed to determine if the ECM 2 has experienced an unexpected restart during an engine start-up operation (S1, S2), and prevent the idle-stop operation from being executed on the internal combustion engine 4 when the determination is affirmative. Thus, starting failure of the internal combustion engine 4 from an operation-ceased state can be prevented without preventing the idle-stop operation from being executed excessively.

Abstract: In a control device, an engine self-restart means tries the engine restart when an engine restart request is issued while the engine rotation speed is within a first rotation speed range. A pre-gear synchronizing control means executes gear rotation speed synchronization between pinion and ring gears, and then retries the engine restart when the engine restart request is issued while the engine rotation-speed is within a second rotation speed range. A pre-gear meshing control means executes gear-meshing between the pinion and ring gears and then retries the engine restart when the engine restart request is issued while the engine rotation speed is within a third rotation speed range. On detecting the engine-restart failure of the engine self-restart control, the control device prohibits the execution of pre-gear synchronizing control until a predetermined time counted form the failure detection time is elapsed, and executes the pre-gear meshing control after the predetermined time period is elapsed.

Abstract: When an engine automatic stop judgment unit (101) judges that an engine automatic stop condition is satisfied so that a fuel injection control unit (105) stops fuel supply to an engine and an ignition control unit (106) stops ignition of the engine, and when an engine restart judgment unit (102) judges that an engine restart condition is satisfied before the engine stops, the pinion gear is driven to rotate. Then, engagement between the ring gear and the pinion gear is started when a deviation between an rpm of the engine detected by an engine rpm calculation unit (104) and an rpm of the pinion gear becomes smaller than a predetermined threshold value. Ignition by an ignition control unit (106) is inhibited during a period from start of the engagement until an engagement completion judgment unit (103) judges that the engagement is completed.

Abstract: A control system for a hybrid vehicle that includes an internal combustion engine and an electric motor includes an engine speed control module, an air pressure control module, and an engine torque control module. The engine speed control module increases engine speed during a first calibration period based on a driver torque request and a predetermined torque threshold. The air pressure control module decreases intake manifold pressure (MAP) of the engine during a second calibration period based on the driver torque request and the predetermined torque threshold. The engine torque control module starts the engine during a period after the first and second calibration periods by activating N of M cylinders of the engine, wherein N is based on the driver torque request and the predetermined torque threshold.

Abstract: A control system for an engine includes a position determination module and a position control module. The position determination module determines a first cam phaser position for starting the engine prior to engine shut down, and determines a second cam phaser position for starting the engine while the engine is shut down. The position control module adjusts a cam phaser to the first cam phaser position at engine shut down. The position control module adjusts the cam phaser from the first cam phaser position to the second cam phaser at engine start up when a difference between the first cam phaser position and the second cam phaser position is greater than a predetermined difference. A method for controlling an engine is also provided.

Abstract: An automated start/stop system for a vehicle comprises an auto-stop module, a diagnostic module, and an auto-start module. The auto-stop module selectively initiates an auto-stop event and shuts down an engine while the vehicle is running. The diagnostic module selectively diagnoses a fault in a clutch pedal position sensor of the vehicle. The auto-start module, while the vehicle is running and the engine is shut down, selectively initiates an auto-start event after the fault has been diagnosed when current drawn by a starter motor is less than a predetermined maximum starting current.

Abstract: In an engine automatic-stop/restart system according to the present invention, in the case where an engine self-restoration determination unit determines that an engine can autonomously be restored, fuel supply by a fuel injection control unit is resumed so that the engine is autonomously restored; and in the case where the engine self-restoration determination unit determines that the engine cannot autonomously be restored, the fuel supply by the fuel injection control unit is resumed, and based on an engine rotation speed detected by the engine rotation speed detection unit, a pinion gear rotation speed detected by the pinion gear rotation speed detection unit, and the result of determination by the engine self-restoration determination unit, there is performed the energization or de-energization of the pinion gear driving unit and the starter motor.

Abstract: Engine starting device, including: a crank signal generation unit (13); and an engine control unit (10) for identifying a predetermined crank position of a crankshaft, and starting the engine, in which the engine control unit estimates, in a course of stopping the engine when a stop condition for the engine is established, based on an engine rpm at the identified predetermined crank position, whether or not the engine rotates backward before reaching the predetermined crank position for a next time, and after estimating that the engine rotates backward, sets an inhibition range which is prescribed from a starter drive inhibition start timing to a starter drive inhibition reset timing, and a permission range which is other than the inhibition range, and when the restart condition is established during rotation of the engine, inhibits restart in the inhibition range and carries out the restart in the permission range.

Abstract: A powertrain system includes a hybrid transmission and an internal combustion engine coupled to an exhaust aftertreatment device. A method for operating the powertrain system includes operating the hybrid transmission to generate tractive torque responsive to an operator torque request with the internal combustion engine in an engine-off state so long as the tractive torque is less than a threshold. The internal combustion engine is operated in an engine-on state at preferred operating conditions to effect light-off of the exhaust aftertreatment device and the hybrid transmission is coincidentally operated to generate tractive torque responsive to the operator torque request when the operator torque request exceeds the threshold. The internal combustion engine is then operated in the engine-on state to generate tractive torque responsive to the operator torque request.

Abstract: Systems and methods for assisted direct start control are provided. An example method varies engine torque, forward clutch engagement pressure, and wheel brake pressure during a vehicle launch responsive to longitudinal vehicle grade to improve launch performance.

Abstract: The present model describes the technical field of parts for the automobile sector, more specifically a device applied in the starter unit that constantly works geared to the main engine. The new model presents a start-up unit that works with a drive gear constantly engaged to the gear train of the main engine; a torque transmission system and free wheel (2) with rollers (5C) and cam (5A2); and a rubber damping system (8) to avoid damages to the start-up system when the combustion engine turns off due to kickback that is a characteristic present in all combustion and explosion engines.

Abstract: An engine start control system is provided that includes a controller configured to perform an idle stop control to stop an engine based on an establishment of a condition. The system further includes a motor configured to reverse-rotationally drive a crankshaft to a predetermined position for normal-rotational or reverse-rotational driving, after engine stop. The controller includes a reverse-rotational drive controller configured to reverse-rotationally drive the motor at a rewinding control duty ratio immediately after the engine is stopped. The controller further includes a reverse-rotation stop condition processor configured to detect whether the crankshaft is rewound to the predetermined position by the reverse-rotational drive controller. Further, the controller includes a motor brake controller configured to apply a brake to the crankshaft by reverse-rotationally driving the motor when it is detected that the crankshaft is rewound to the predetermined position.

Abstract: A method of controlling an automatic switch-off and switch-on procedure of a drive unit in a motor vehicle via a start-stop device is provided, by which, when the motor vehicle stops, the drive unit is automatically switched off if predefined switch-off conditions have been met, and by which an automatically switched-off drive unit is automatically switched on if at least one driver-side or system-side switch-on request is made. When a system-side switch-on request takes place, the automatic switch-on procedure will be suppressed at least temporarily if a delay condition exists.

Abstract: Vehicle operation diagnostic devices, methods, and programs detect an idling stop of a vehicle. The devices, methods, and programs acquire a fuel consumption required for an engine of the vehicle to start, and acquire, if the idling stop is detected, an amount of fuel consumed if idling were to be continued during a period in which the idling stop is performed. The devices, methods, and programs determine whether a fuel consumption reduction effect is obtained based on the engine-start fuel consumption and the fuel consumption if idling were to be continued, and provide guidance based on the determination of whether the fuel consumption reduction effect is obtained.

Abstract: An engine system includes a first module that determines a cylinder of an engine to be in one of M prediction types and generates a distance from intake signal indicating a number of prediction steps the cylinder is away from an intake stroke. M is an integer greater than or equal to 3. A second module determines a cycle type of the cylinder. The cycle type indicates a number of combustion cycles the cylinder has experienced from a last restart of the engine. A cylinder air charge module estimates an air mass within the cylinder based on the distance from intake signal and the cycle type.

Abstract: In an ECU provided for idle-stop control, when a user start command is outputted from an ECU to start an engine in response to a manual start operation of a driver, transistors are turned on and a solenoid is operated to engage a pinion gear of a starter with a ring gear. After a delay period of a delay circuit, a transistor is turned on by an output of the delay circuit and an electromagnetic switch is turned on to energize a motor of the starter. A microcomputer measures an actual delay time from when the user start command is outputted to turn-on of the transistor and checks whether the measured time corresponds to a normal time of the delay time.

Abstract: The invention relates to a starter device which is used to start internal combustion engines, which comprises an electromagnetic toe-in mechanism (10) and a start-stop-mechanism, which in a stop-phase of the internal combustion engine, even during and/or after stopping the internal combustion engine, a positioned state of the toe-in mechanism (10) is provoked, such that when the internal combustion engine is subsequently started, it is already in the positioned state. According to the invention, a locking device (20), which is used to lock the toe-in mechanism (10) in the positioned state, is embodied in such a manner that it can be controlled such that the electromagnetic toe-in mechanism (10) is maintained in the advanced position during the stop-phase.

Abstract: The total length of starter harness 7 for exclusive use for connecting a starter for an engine and plus-side terminal 4a of in-vehicle battery 4 is increased by providing a surplus redundant segment 21 to increase resistance in harness 7 beyond length required for laying the harness in an engine room. Redundant segment 21 is collected in a form of rod by forming a two-fold portion by folding a portion of the single continuous harness 7, and further folding the two-fold portion twice, and fixed through harness holder 23 to bracket 22 of battery tray 25. Without using a resistor receiving limitation of the heat resistance, it is possible to suppress a voltage drop at the time of restart, problematical in a vehicle having an idle-stop function. A required resistance is obtained by increasing the length redundantly, so that a temperature increase of harness 7 is small.

Abstract: In a method for determining, whether a crankshaft of a combustion engine rotating forward after a reverse rotation is oscillating or continues the forward movement, when noticing a reverse rotation of the crankshaft, the covered rotational angle during a reverse rotation is detected, an actual threshold is computed by adding the covered rotational angle and a predetermined safety distance. The rotational angle of the crankshaft rotating immediately forward after a reverse rotation is compared to the actual threshold.

Abstract: An engine including an automatic choke that includes a choke valve movable between a fully closed position and a fully open position, a temperature sensor coupled to the engine and operable to provide a temperature signal indicative of a temperature of the engine, and a motor connected to the choke valve and operable to move the choke valve in response to a motor control signal. A controller is electrically connected to the motor and to the temperature sensor. The controller includes an electronic circuit having a memory. A table includes engine specific choke position data stored in memory, wherein the controller determines a choke initial position based on the temperature of the engine and the choke position data, and wherein the motor moves the choke valve toward that position in response to an attempt to start the engine.

Abstract: A starter includes a pinion gear that can be engaged with a ring gear provided around an outer circumference of a flywheel or a drive plate of an engine, an actuator for moving the pinion gear to a position of engagement with the ring gear in a driven state, a helical spline for rotating the pinion gear in a reverse direction while the pinion gear moves toward the ring gear, and a motor for rotating the pinion gear. The actuator and the motor are individually controlled. After the actuator was driven and before the motor is driven, drive of the actuator is stopped.

Abstract: One example method for an engine having an automatic stopping function in which the engine is automatically stopped when a predetermined engine stopping condition is satisfied, and then the engine is automatically restarted when a predetermined engine restarting condition is satisfied, includes the following: a first step for driving a motor so as to increase an engine rotating speed of the engine up to a predetermined rotating speed and maintain the engine rotating speed, in a case in which a predetermined first condition is satisfied when the engine rotating speed is below the predetermined rotating speed during automatic engine stopping; and a second step for restarting a fuel supply into the engine in a case in which a predetermined second condition is satisfied after the first step is executed.

Abstract: A method for improving starting of an engine that may be repeatedly stopped and started is presented. In one example, fuel injection timing is selectively adjusted based on engine stop position and amount of time the engine is stopped. The method may improve engine starting and lower engine noise.

Abstract: The invention relates to a control method for an internal combustion engine system, capable of preventing an internal combustion engine in a state after being automatically stopped, from falling into an unrestartable state. Upon satisfaction of a given automatic stop condition, the engine 10 being running is automatically stopped (Step 11). A value of current IEBAT flowing out of a starter battery 520 is compared with a given current value IEBAT—TH, in an automatically stopped state of the engine 10 (Step S30) to diagnosis a discharging status of the starter battery 520. If a result of the diagnosis indicates that the value of current IEBAT flowing out of the starter battery 520 is greater than the given current value IEBAT—TH, it is determined that a post-attached load is detected, and the engine 10 is restarted irrespective of the satisfaction or non-satisfaction of a given restart condition.

Abstract: Methods and systems are provided for controlling engine shutdown in a vehicle. One example method includes, after discontinuation of combustion and during engine spin down, reducing cylinder air charge while maintaining intake manifold pressure above a threshold value.

Abstract: One aspect of the present disclosure relates to a method for controlling an automatic start-stop mechanism for an internal combustion engine. The method comprises providing a turbocharger temperature, comparing the turbocharger temperature with a constant and, if the turbocharger temperature is greater than the constant, deactivating the automatic start-stop mechanism of the internal combustion engine.

Abstract: A method automatically starts an internal combustion engine having variable valve lift. The internal combustion engine is shut down temporarily in certain driving operating states in order to save fuel and being re-started in the event of a change in the driving operating state. During the engine run-down, the inlet valve is actuated such that the closing time is shifted, with the cylinder being opened via the inlet valve until a pressure compensation has taken place in the cylinder in which an under-pressure would prevail during the engine run-down.

Abstract: A vehicle control device for a vehicle system automatically stops an internal combustion engine of a vehicle when a predetermined stop condition is satisfied and automatically starts the automatically stopped internal combustion engine when a predetermined start condition is satisfied. A stop point detection unit detects a stop point, at which the vehicle possibly stops, while the vehicle travels based on map information stored in a map information storage unit. A traveling information control unit stores traveling information, which includes a state of the vehicle stopping at a stop point and a state of the vehicle passing by the stop point, in the traveling information storage unit. A stop determination unit determines whether to stop the internal combustion engine when the vehicle stops at a stop point based on the traveling information of the stop point stored in the traveling information storage unit.

Abstract: A control method of restarting an engine of an AT ISG vehicle may include a first step of restarting the engine when a state of the vehicle satisfies a restart condition after an idle-stop, a second step of keeping a throttle valve constant at a first critical value or less when a positional value of an acceleration pedal may be equal to a second critical value or more after the first step, and a third step of opening a throttle valve until the positional value of the acceleration pedal detected by the acceleration pedal position sensor and a positional value of the throttle valve detected by a throttle valve position sensor may be matched after a critical time passes, a shifting may be completed after the restarting, or when the acceleration pedal may be pressed down less than at the second critical value after the first step.

Abstract: Method and systems are provided for controlling a vehicle system including an engine that is selectively deactivated during engine idle-stop conditions. One example method comprises, adjusting a brake torque applied to a deactivated rotating engine after an engine restart request, the brake torque applied to slow the engine to at least a predetermined threshold speed without stopping the engine, and engaging a starter to the still rotating engine to increase the engine speed and restart the engine.

Abstract: A method for controlling the operating mode of a drive of a vehicle that includes a main drive unit and an auxiliary tractive energy source. The method includes operating the main drive unit, detecting the duration of actuation of an uninterrupted actuation of a brake pedal, and detecting whether the duration of actuation is above a minimum duration by comparing the duration of actuation with a minimum duration. The main drive unit is switched off if it has been detected that the duration of actuation is above the minimum duration. Otherwise, operation of the main drive unit is continued if it has been detected that the duration of actuation is not above the minimum duration. A device for carrying out the method is also described, which includes a timer for detecting the duration of actuation and a comparator for comparing the duration of actuation with a minimum duration.

Abstract: A stop-start control apparatus for a port injection engine (1) including cylinders (2) stops the engine (1) by stopping fuel injection from each injector (13), when a predetermined stop condition is fulfilled. An estimated position of a piston (5) in each cylinder (2) after the engine (1) is stopped is determined during a stop process period from when the predetermined stop condition is fulfilled until when the engine (1) is stopped, and a compression stroke cylinder in which the piston (5) is to be stopped in a compression stroke is identified. An amount of fuel to be injected from the injector (13) for the compression stroke cylinder during the stop process period is set based on the estimated position of the piston (5) in the compression stroke cylinder. The injector (13) injects the fuel in the set fuel amount so that the fuel is contained in the compression stroke cylinder when the engine is stopped.

Abstract: An engine with vacuum and coolant pumps is disclosed. In one example, the vacuum and coolant pumps are mechanically coupled together and driven by a single motor. The approach may reduce system cost and complexity.

Abstract: Methods and systems are provided for controlling a vehicle system including an engine that is selectively deactivated during engine idle-stop conditions. One example method includes, during a first condition, engaging an engine starter, without applying a starter current, to the deactivated rotating engine after the engine speed drops below a threshold speed. The method further includes, during a second condition, engaging the starter and adjusting a starter motor switch to apply a starter braking torque to the rotating engine.

Abstract: Methods and systems are provided for controlling a vehicle system including an engine that is selectively deactivated during engine idle-stop conditions and selectively reactivated during engine restart conditions. One example method comprises, during an engine restart from an idle stop, performing a first combustion event in a cylinder with a piston at an engine crankshaft position that is after a crankshaft position at which said cylinder's exhaust valve opens, and before a crankshaft position at which the cylinder's intake valve closes, during a cycle of said cylinder. In this way, inaccuracies in cylinder aircharge estimation may be reduced, thereby also reducing air-fuel ratio errors and improving the quality and repeatability of engine restarts.

Abstract: Method for controlling a start-up of an internal combustion engine, an actuation of the internal combustion engine being begun and maintained by an electric machine in order to set the internal combustion engine into independent motion, thereby characterized, in that the actuation of the internal combustion engine is concluded before an initial combustion in the internal combustion engine takes place.

Abstract: In an internal combustion engine automatic-stop/restart control system according to the present invention, excellent restartability of an internal combustion engine is ensured in such a way that, while the internal combustion engine inertially rotates after its automatic stop, a solenoid of a starting apparatus for starting the internal combustion engine is driven so that a pinion gear is moved in the axis direction and pushing the pinion gear against a ring gear is started, and detection of a reference signal through a crank angle signal is prohibited until a predetermined period elapses after the pushing has been started so that erroneous reference signal recognition is prevented.

Abstract: An engine control system comprises an intake valve deactivation module and an exhaust valve deactivation module. The intake valve deactivation module deactivates an intake valve of a cylinder of an engine based on an engine stop request such that the intake valve remains closed. The exhaust valve deactivation module deactivates an exhaust valve of the cylinder after the intake valve deactivation module deactivates the intake valve such that the exhaust valve remains closed.

Abstract: A process and a corresponding system are provided for automatically turning off and starting an internal-combustion engine in a motor vehicle via a start-stop device, which automatically turns off the internal-combustion engine if the vehicle is braked to a stop and is held in the stopped position by the operation of the brake pedal, and which, if the internal-combustion engine is automatically turned off and the operated brake pedal is released, automatically starts the internal-combustion engine. If the internal-combustion engine is automatically turned off, an automatic starting of the internal-combustion engine by releasing the brake is prevented if the brake pedal was increasingly depressed beforehand while the internal-combustion engine was turned-off.

Abstract: In a method and a device for engine stop/engine start of hybrid vehicles, which includes an internal combustion engine and an electric machine which is coupled to the internal combustion engine and is selectively able to be operated regeneratively or motively, the engine speed can be detected and compared to a limit speed to initiate the stopping of the engine in a hybrid vehicle using an automatic start/stop mechanism, and if the engine speed drops to the threshold speed, the engine is stopped, the electric machine being switched over into the motive or the regenerative operation when the limit speed is reached; the electric machine assuming the limit speed, whereas the fuel supply of the internal combustion engine is shut down or remains shut down and the electric machine initiates the stopping of the internal combustion engine.

Abstract: In a system installed in a vehicle, an automatic stop of an engine is carried out when an engine automatic stop condition is met during the vehicle being decelerated. The automatically stopped engine is restarted when an engine restart condition is met before the vehicle is stopped. A vehicle speed obtaining unit obtains a vehicle speed, and a threshold determining unit determines a threshold based on a predetermined-timing value of the vehicle speed. The predetermined-timing value is obtained at a predetermined timing when or after the engine restart condition is met. The threshold is used to determine whether to enable a next automatic stop of the engine. A stop enabling unit enables the next automatic stop of the engine when the speed of the vehicle obtained after the engine restart condition is met is equal to or higher than the threshold.

Abstract: Provided is a crank angle detection unit configured to output respective recognition signals from a plurality of intermediate positions each flanked with the positions corresponding to the respective top dead centers of the pistons of a plurality of cylinders and to differentiate the kinds of the respective recognition signals output from the adjacent intermediate positions. Also included is a piston position determination unit that determines the stopping position of the piston when the internal combustion engine stops, based on the crank angle range stored in a crank angle range storage unit and a crank angle corresponding to the position of the recognition signal outputted by the crank angle detection unit. A cylinder to which a fuel is to be initially supplied when the internal combustion engine restarts is determined, based on the stopping position of the piston determined by the piston position determination means.

Abstract: A vehicle control apparatus is provided which is operative in an automatic engine stop mode to stop an engine automatically and in an engine restart mode to restart the engine automatically after the engine is stopped in the automatic engine stop mode so as to output a predetermined reference engine torque immediately after the engine is started. The vehicle control apparatus works to determine the travel performance of the vehicle required immediately after the engine has been restarted in the engine restart mode and control the torque outputted by the engine based on the determined travel performance so as to ensure the drivability of the vehicle after the engine is restarted automatically.

Abstract: An engine-starting device for stopping the engine after satisfaction of an idling-stop condition during idling of a vehicle, starting rotation of a starter-motor upon satisfaction of a starter-motor rotation start condition, and causing a pinion gear to mesh with a ring gear upon satisfaction of a pinion gear meshing condition, includes the ring gear to be connected to a crank shaft, the pinion gear for transmitting the starter-motor rotation, a plunger for causing the pinion gear to mesh with the ring gear, and a starter control section for instructing energization of the starter-motor, in which the starter-motor is energized to be rotated upon the satisfaction of the starter-motor rotation start condition prior to clearing of the idling-stop condition in response to a restart request, and the pinion gear is caused to mesh with the ring gear by the plunger upon the satisfaction of the pinion gear meshing condition.

Abstract: A safety system for connection to a toxic gas detector and a toxic gas producing engine, and its operating method, includes an interrupt device coupled to connections to the detector and the engine. The interrupt device includes a toxic gas signal detecting circuit and a circuit for permitting starting of the engine. The detecting circuit activates the permitting circuit if the toxic gas signal represents a toxic gas concentration below a predetermined level. In one embodiment, the permitting circuit is activated if the safety system is healthy and fully functional. Similarly, a safety system for connection to a toxic gas detector and a toxic gas supply, and its operating method, includes an interrupt device coupled to connections to the detector and the toxic gas supply. The interrupt device includes a toxic gas signal detecting circuit and a circuit for permitting of flow from the toxic gas supply.

Abstract: An internal-combustion-engine automatic stop and restart system performs restarting control by making the pinion pushing unit push out the pinion gear so as to engage with the ring gear, when the restarting condition is satisfied in a time period from a time when the automatic stopping condition is satisfied to a time when the rotation of the internal combustion engine stops. A throttle valve control unit opens the throttle valve even when the restarting condition has not been satisfied and stops control of the throttle valve in a time period from when the rotation of the internal combustion engine stops to when the restarting condition is satisfied, when the rotation speed of the internal combustion engine becomes lower than a predetermined value in a time period from when the automatic stopping condition is satisfied to when the rotation of the internal combustion engine stops.