Class / Patent application number | Description | Number of patent applications / Date published |
123332000 | Engine speed reduction by fuel cutoff | 16 |
20100154739 | DEACTIVATION OF HIGH PRESSURE PUMP FOR NOISE CONTROL - 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. | 06-24-2010 |
20140318496 | FUEL CUT CONTROL DEVICE AND FUEL CUT CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - 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 (A | 10-30-2014 |
20140338634 | Automatic Fuel Shutoff - 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. | 11-20-2014 |
20140373809 | VEHICLE-DRIVING DEVICE AND VEHICLE-DRIVING METHOD - 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. | 12-25-2014 |
20160040612 | FUEL CUTOFF SYSTEM FOR LIQUEFIED PETROLEUM INJECTION VEHICLE AND CONTROL METHOD THEREOF - A fuel cutoff system for a liquefied petroleum injection (LPI) vehicle includes a bombe that stores liquefied petroleum gas (LPG) fuel. At least one injector is connected to a fuel pump, which is disposed in the bombe, through a fuel supply line, and the at least one injector is provided in an engine to supply the LPG fuel fed through the fuel supply line to the engine. A fuel return line interconnects the engine and the bombe, separately from the fuel supply line, through which the LPG fuel returns to the bombe from the engine. At least one fuel cutoff valve is provided on the fuel supply line. The at least one fuel cutoff valve is electrically connected to an ignition key and activated by an ignition power supplied depending on whether the ignition key is in an On or Off position. | 02-11-2016 |
20160108822 | CYLINDER DEACTIVATION APPARATUS OF ENGINE - A cylinder deactivation apparatus of an engine is configured to selectively deactivate at least one of a plurality of cylinders in accordance with operation states of an engine. The cylinders are configured to receive intake air from an intake manifold. The apparatus includes: at least one deactivation intake port having first and second ends. The first end communicates with the intake manifold. An intake channel connects the second end of the deactivation intake port to the at least one of the cylinders that is selectively deactivated. A deactivation throttle valve is disposed in the deactivation intake port and configured to selectively open or close the deactivation intake port. A controller is configured to control an operation of the deactivation throttle valve such that intake air is selectively supplied to the at least one of the cylinders. | 04-21-2016 |
20160108825 | METHODS AND SYSTEM FOR REACTIVATING ENGINE CYLINDERS - Systems and methods for reactivating cylinders of an engine that have been temporarily deactivated to conserve fuel are presented. The systems and methods adjust fuel injection quantity and timing of direct fuel injectors to reduce particulate emissions that may form in cylinders that are being reactivated due to reduced piston and combustion chamber temperatures that may occur in newly reactivated cylinders. | 04-21-2016 |
123333000 | By electric means | 9 |
20090205609 | Method and Device for Operating an Internal Combustion Engine - A method and a device for operating an internal combustion engine are provided which make it possible to implement different deceleration requests to the internal combustion engine by switching over between half engine operation and full engine operation. A deceleration request is received particularly in a nonoperating state. A switchover is made between a first operating state and a second operating state of the internal combustion engine as a function of the magnitude of the deceleration request. The first operating state and the second operating state differ, in this instance, in the number of cylinders whose charge changing process is interrupted. | 08-20-2009 |
20110290212 | SYSTEMS AND METHODS FOR IMPROVED ENGINE START-STOP RESPONSE - A control system for a vehicle that includes an engine includes an engine-stop module and a fuel control module. The engine-stop module determines whether to stop the engine based on at least one of input from a driver of the vehicle and vehicle operating parameters. The fuel control module stops the engine and controls a rate of engine speed decay by disabling fueling to cylinders of the engine according to a predetermined sequence. | 12-01-2011 |
20130146022 | APPARATUS AND METHOD FOR PROCESSING FUEL CUT - 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. | 06-13-2013 |
20130186368 | SPEED REDUCTION METHOD FOR HAND-CARRIED ENGINE-DRIVEN WORKING MACHINE - A speed reduction method for a hand-carried engine-driven working machine is provided in which a speed reduction of an engine can be attained reliably and safely by preventing the occurrence of lean come-down phenomenon in such a state that the engine is operating in a practical revolution speed range. An acceleration is calculated based on a change in revolution speed, and when the acceleration becomes smaller than a predetermined threshold, an ignition timing is retarded by a desired amount based on a determination that the engine is being decelerated, and further, a fuel flow rate is also increased, whereby the decelerated state of the engine is maintained without fail, so that the occurrence of lean come-down phenomenon is prevented in the process of reducing the revolution speed of the engine. | 07-25-2013 |
20130213351 | ENGINE SYSTEM - An engine system capable of immediately restarting an engine upon detecting a driver's reaccelerating operation while an engine speed is decreased by idle-stop control. The system includes an idle-stop control unit which performs the idle-stop control of stopping fuel injection to the engine when the engine idly rotates upon stopping the vehicle by connecting an electric assist turbocharger obtained by the combination of a turbocharger and a motor to an intake and exhaust system of the engine. The idle-stop control unit is configured to restart the engine by resuming the fuel injection to the engine while operating a motor upon detecting the reaccelerating operation during the idle-stop control. | 08-22-2013 |
20140331966 | METHOD FOR OPERATING A GASOLINE ENGINE HAVING A COMPLETELY OPEN THROTTLE VALVE AND A GASOLINE ENGINE - A method is described for operating a gasoline engine having at least one throttle valve controlling a combustion air supply for at least two cylinders, the at least one throttle valve being opened completely and a power output of the gasoline engine being controlled by deactivating at least one of the at least two cylinders. | 11-13-2014 |
20160115878 | METHOD AND SYSTEM FOR PARTICULATE MATTER CONTROL - Methods and systems are provided for particulate matter control in an engine configured for skip-fire operation. A cylinder pattern selected for selective cylinder deactivation, including a total number of deactivated/active cylinders as well as individual deactivated cylinder identities, may be adjusted based on an engine soot load, or a parameter indicative of engine soot load such as engine coolant temperature. In addition, reactivated engine cylinders may be transiently operated with split fuel injection to raise combustion surface temperatures. | 04-28-2016 |
20160131047 | Automatic Fuel Shutoff - 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. | 05-12-2016 |
20160252024 | SAFETY SYSTEM FOR ENGINE SHUTDOWN, AND ENGINES AND EQUIPMENT INCORPORATING THE SAME | 09-01-2016 |