Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7325535 | Engine controller An engine controller controls an actuator for selectively executing spark-ignited combustion and compression-ignited combustion of an internal combustion engine in accordance with an engine operational state. The controller is comprises of a deterioration recognitio... | 02/05/2008 |
| 7281368 | Nodischarge quantity estimation method for internal combustion engine In an NOx discharge quantity estimation method for an internal combustion engine equipped with an EGR apparatus, the gas components (e.g., oxygen molecules and NOx) of intake gas taken into a combustion chamber are assumed to be uniformly distr... | 10/16/2007 |
| 7234438 | System and method for engine operation with spark assisted compression ignition A method of operating an internal combustion engine having a combustion chamber with a piston is disclosed. The method comprising during a first mode, adjusting an operating condition of the engine so that a first mixture of air and fuel in the combustion chamber at... | 06/26/2007 |
| 7134423 | Ignition diagnosis and combustion feedback control system using an ionization signal This feature of the present invention comprises an ignition diagnostics and feedback control system based upon detected ionization current in an individual cylinder. The system is divided into two subsystems: an ignition diagnostics subsystem and an ignition feedbac... | 11/14/2006 |
| 7089913 | Compression ignition internal combustion engine A control apparatus operates a compression ignition internal combustion engine by switching between spark ignition combustion using an ignition device and compression ignition combustion which self-ignites a mixture by piston compression. Variable valve mechanisms v... | 08/15/2006 |
| 7086382 | Robust multi-criteria MBT timing estimation using ionization signal This feature of the present invention is a robust multi-criteria minimum timing for the best torque (MBT) timing estimation method and apparatus utilizing different ionization signal waveforms that are generated under different engine operating conditions. This feat... | 08/08/2006 |
| 7021285 | Control device for internal combustion engine A combustion variation value is detected, and a function that uses the detected combustion variation value is added to CVAR(i−1) to obtain CVAR(i); and using the resulting value, an exhaust gas recirculation amount and an ignition timing are obtained. A combustion... | 04/04/2006 |
| 6959692 | Computer controlled engine valve operation An electronic valve actuation system and control method is described. The valve timing is changed between early and late intake valve closing depending on engine operating conditions. Further, valve timing is adjusted to control engine airflow or engine torque. Fina... | 11/01/2005 |
| 6944530 | System and method for air flow and EGR flow estimation An exhaust gas recirculation system directs exhaust gasses from an exhaust manifold to an intake manifold of an internal combustion engine. The exhaust gasses travel from the exhaust manifold, first passing through a flow control valve and then through a measuring o... | 09/13/2005 |
| 6904356 | Apparatus and method for estimating internal EGR amount in internal combustion engine An electronic control unit of an internal combustion engine computes a remaining combusted gas amount Megr1, which exists in a cylinder immediately before an intake valve is opened, based on an intake pipe pressure Pm, an engine speed NE, and an intake va... | 06/07/2005 |
| 6868329 | Control method of EGR system of engine A control method of an EGR system of an engine capable of effectively performing an EGR control at a time of rapid acceleration. For this purpose, an intake air flow rate of the engine is obtained, and from a target EGR valve opening degree and a difference in press... | 03/15/2005 |
| 6827062 | Ignition timing control apparatus for internal combustion engine An ignition timing control apparatus for an internal combustion engine having a plurality of cylinders, wherein operation of the engine is switchable between a partial-cylinder operation, which operates some of the cylinders, and an all-cylinder operation, which ope... | 12/07/2004 |
| 6807942 | Control system for internal combustion engine A control system for an internal combustion engine is disclosed. The engine has an exhaust gas recirculation passage for recirculating a portion of exhaust gases from the engine to an intake system and an exhaust gas recirculation control valve for controlling an am... | 10/26/2004 |
| 6739295 | Compression ignition internal combustion engine It is an object of the present invention to provide a compression ignition internal combustion engine capable of making compatible an increase in compression self-ignition operating area with an optimum output torque control in the operating area and also smoothly s... | 05/25/2004 |
| 6729301 | Ignition timing control system for internal combustion engine An ignition timing control system for an internal combustion engine includes an electronic control unit. In a transition state where an in-cylinder EGR rate varies, the unit calculates an ignition timing corresponding to the in-cylinder EGR rate by means of linear i... | 05/04/2004 |
| 6644275 | Apparatus for controlling engine An apparatus for controlling an engine responds to the switching of combustion mode from stoichiometric combustion to lean-fuel combustion to vary the target throttle opening in step-wise fashion, causing the quantity of intake air to increase in a fashio... | 11/11/2003 |
| 6505465 | Device for controlling an internal combustion engine A device for controlling an internal combustion engine capable of estimating the amount of NOx emission within short periods of time maintaining high precision and realizing improved control performance without increasing the cost as a result of not using... | 01/14/2003 |
| 6279537 | Air fuel ratio control apparatus for an internal combustion engine In order to improve estimation accuracy of estimating the value of the NOx exhaust concentration, the air fuel ratio control apparatus is adapted to estimate the NOx exhaust concentration from at least either one of a value depending on the air fuel ratio... | 08/28/2001 |
| 6237329 | Combustion controller for lean burn engines A method and apparatus for controlling a vehicle engine. A catalyst in the exhaust system for reducing NOx emissions. When the catalyst is full, the air-fuel mixture is temporarily enriched for reducing the level of NOx. A primary control procedure regula... | 05/29/2001 |
| 6178373 | Engine control method using real-time engine system model An engine control method for an internal combustion engine having a powertrain control module (PCM). The powertrain control module includes a microprocessor and associated memory. A mathematical model of the engine cycle of the engine system is stored in ... | 01/23/2001 |
| 6058906 | Fuel/air ratio control for internal combustion engine An engine system for an internal combustion engine of a type having a stratified combustion mode and a homogeneous combustion mode comprises a controller for increasing a fuel air ratio (or equivalence ratio) of an air fuel mixture produced in the engine ... | 05/09/2000 |
| 5904129 | Control device for cylinder injection type internal-combustion engine A control device for a cylinder injection type internal-combustion engine restrains the deterioration of combustion in the cylinder injection type internal-combustion engine which implements stratified charge combustion at a delicate fuel injection timing... | 05/18/1999 |
| 5887568 | Controller and control method for engine ignition timing A predetermined firing delay time B1 is added to a value obtained by dividing a total gas weight Gcyl in a cylinder by an unburnt gas density basic value DENS and a laminar flow flame velocity basic value FLML. The value obtained by this calcul... | 03/30/1999 |
| 5639961 | Process for diagnosing defects of an exhaust gas recirculation device The invention provides a process for diagnosing defects in an exhaust gas recirculation device of an internal-combustion engine system having an engine timing gear with a knock control. According to the invention, the firing point is advanced until a pred... | 06/17/1997 |
| 5537977 | Method of estimating exhaust gas recirculation in an intake manifold for an internal combustion engine A method of estimating exhaust gas recirculation in an intake manifold for an internal combustion engine includes the steps of determining a volumetric efficiency value of the intake manifold, determining whether a speed of the engine is accelerating, get... | 07/23/1996 |
| 5505174 | EGR rate estimation system for internal combustion engine A system for estimating an exhaust gas recirculation rate for an internal combustion engine. In the system, the EGR rate when its operation is steady is first determined to a desired value with respect to the engine operating conditions at least including... | 04/09/1996 |
| 5482020 | Control system for internal combustion engines A control system for an internal combustion engine includes an exhaust gas recirculation passage extending between the intake system and the exhaust system, for recirculating part of exhaust gases emitted from the engine, an EGR valve for controlling a fl... | 01/09/1996 |
| 5383126 | Control system for internal combustion engines with exhaust gas recirculation systems A control system for an internal combustion engine estimates an amount of adherent fuel adhering to the inner surface of the intake passage, as well as an amount of carried-off fuel evaporated form fuel adhering to the inner surface of the intake passage ... | 01/17/1995 |
| 5303168 | Engine operation to estimate and control exhaust catalytic converter temperature A method of operating an internal combustion engine wherein a predicted engine exhaust temperature is used as an input to a microprocessor controlling the engine. Exhaust temperature can be controlled by adjusting engine operation. Exhaust gas recirculati... | 04/12/1994 |
| 5287836 | Control system for internal combustion engines A control system for an internal combustion engine determines ignition timing of the engine and generates an ignition command signal to generate high voltage for discharging a spark plug provided for each cylinder of the engine. The control system detects... | 02/22/1994 |
| 5273019 | Apparatus with dynamic prediction of EGR in the intake manifold A method and apparatus disclosed provide dynamic prediction of re-circulated exhaust gas content in an engine intake manifold. An engine-controller combination, comprises a vehicle engine and an exhaust gas re-circulation valve providing re-circulation of... | 12/28/1993 |
| 5183020 | Ignition timing control apparatus for engine In an engine including an exhaust gas recirculation mechanism for recirculating exhaust gas to the engine intake system, and an ignition timing control apparatus for the engine, a duty-controlled EGR rate regulating solenoid valve is disposed in an EGR pa... | 02/02/1993 |
| 4947820 | Combustion control system for internal combustion engine adaptable to on and off of exhaust gas recirculation A combustion control system for an internal combustion engine operable with the exhaust gas recirculation, the control system determining a basic quantity of engine combustion control such as a basic amount of fuel injection and/or ignition timing based u... | 08/14/1990 |
| 4881509 | Electronic control device for internal combustion engine with EGR control apparatus An electronic control device in an internal combustion engine with an EGR apparatus for calculating a predetermined control variable such as a fuel injection time period or an ignition timing, and correcting same to exclude a component stemming from EGR g... | 11/21/1989 |
| 4823760 | Internal combustion engine controlling apparatus An internal combustion engine controlling apparatus comprises an exhaust gas returning passage for adjustably returning a part of exhaust gas from an internal combustion engine, a calculating means for effecting digital calculation of a controlled quantit... | 04/25/1989 |
| 4608955 | Ignition timing control system for an automotive engine An ignition timing control system with an exhaust gas recirculation (EGR) system has a primary vacuum-advance mechanism operated by vacuum in an intake passage of an engine to advance the ignition timing of the engine, and a secondary vacuum-advance mecha... | 09/02/1986 |
| 4465046 | Method and apparatus for controlling the combustion process of an internal combustion engine Method and apparatus for controlling the combustion process of an internal combustion engine having at least one cylinder and an ignition device for initiating ignition of a combustible charge, whereby: (1) the moment of ignition of the charge at a position F ... | 08/14/1984 |
| 4450808 | Ignition timing control device An ignition timing control device which optimizes ignition timing even at low atmospheric pressures. This ignition timing control device comprises a detecting means for detecting when an exhaust gas recirculation (EGR) device should be actuated or not. Wh... | 05/29/1984 |
| 4314540 | Method and apparatus for ignition system spark timing control where exhaust gas recirculation is used A method and apparatus for controlling ignition system spark timing where exhaust gas recirculation is employed. The value of spark advance is determined based upon engine operating parameters and exhaust gas recirculation rate is sensed. Correction means... | 02/09/1982 |
| 4258683 | Electronic ignition control apparatus To determine an optimum spark advance angle for activation of a spark plug, memory means is provided to previously store a data indicating a plurality of optimum spark advance angles for activation of the spark plug in relation to each amount of air sucke... | 03/31/1981 |
