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...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7047741 | Methods for low emission, controlled temperature combustion in engines which utilize late direct cylinder injection of fuel A method is provided for close control and adjustment of in-cylinder oxygen concentration levels together with boost adjustments to minimize harmful emissions during transients in engines which utilize late direct cylinder injection of fuel. EGR flow rates are adjus... | 05/23/2006 |
| 6155240 | Actuator control apparatus for internal combustion engine A lower limit EIEOF of a current for controlling the EGR valve employed to prevent the EGR valve from generating chattering is set in accordance with an engine revolution speed NE which indirectly indicates an amount of exhaust pressure acting on the EGR ... | 12/05/2000 |
| 6148805 | Engine with hydraulic fuel injection and EGR valve using a single high pressure pump An engine system comprises a hydraulically actuated fuel injection system and an EGR valve circuit connected via a fluid flow passage that provides hydraulic fluid to both the fuel injection system and to the EGR valve circuit. The hydraulically actuated ... | 11/21/2000 |
| 6026790 | Diesel engine emission control system The present invention provides improvements in EGR control system of a diesel engine by limiting the maximum fuel, in amount, to be drawn into the engine cylinder and EGR rate in response to result of monitoring performance of EGR control. When the actual... | 02/22/2000 |
| 5778674 | Turbocharged diesel engine In a diesel engine in which boost air is supplied by a turbocharger, the generation of dry soot, which is a component of smoke, is suppressed by lowering the intake air temperature in the cylinder at the compression top dead center position of the piston.... | 07/14/1998 |
| 5704340 | Excess air rate detecting apparatus and an excess air rate control apparatus for an engine An excess air rate detecting apparatus and a control apparatus using the same are provided. In accordance with operating conditions of an engine (1) which includes an exhaust gas recirculation system, the detecting apparatus repeatedly detects the excess ... | 01/06/1998 |
| 5377651 | Closed-loop control of a diesel engine Closed-loop control of the quantity of diesel engine exhaust gas that is recirculated to an air intake of the engine responds to a degree of deviation of a sensed air inlet rate away from a desired air inlet rate. A series of dedicated adaptive correction... | 01/03/1995 |
| 5201300 | Direct injection diesel engine In a diesel engine having a combustion chamber formed by a cylinder and piston where fuel is injected into the chamber directly, and provided with a device whereby part of the exhaust gas is recycled into the air intake depending on the running condition ... | 04/13/1993 |
| 5186139 | Diesel engine A diesel engine includes a variable swirl forming mechanism, an exhaust gas recirculation (EGR) control mechanism, and an injection timing control mechanism. The variable swirl forming mechanism forms strong, middle or weak air swirls in a combustion cham... | 02/16/1993 |
| 5115789 | Direct injection diesel engine A diesel engine having a combustion chamber formed by a cylinder and piston where fuel is injected into the chamber directly, provided with a device to recycle part of the exhaust gas is recycled into the air intake depending on the running condition of t... | 05/26/1992 |
| 4773379 | Apparatus for controlling pressure-activated actuator, and apparatus for controlling exhaust-gas recirculation An apparatus for controlling the exhaust-gas recirculation cycling of an engine includes an exhaust-gas recirculation passage connected at one end to an intake passage and at the other end to an exhaust passage. An exhaust-gas recirculation valve is provi... | 09/27/1988 |
| 4727848 | Device for and method of supplying cases into a combustion space of a self-igniting internal combustion engine A controlling device for controlling the supply of gases into combustion spaces of a self-igniting internal combustion engine includes a control member for regulating the flow of returned exhaust gas and an air throttle for regulating flow of sucked in ai... | 03/01/1988 |
| 4723527 | Process for increasing the process temperature of an air compressing internal combustion engine A process for increasing the process temperature of an air compressing internal combustion engine includes mixing exhaust gas with the intake air. The amount of exhaust gas to be recirculated is set with reference to speed and load. To achieve an increase... | 02/09/1988 |
| 4644926 | Diesel cycle engines having heat insulated auxiliary combustion chambers A diesel engine including an auxiliary or swirl chamber provided in the cylinder head and in communication with a main combustion chamber. The auxiliary chamber is defined in a shell structure which is located in the cylinder head and provided with a heat... | 02/24/1987 |
| 4638784 | Method of and apparatus for controlling vacuum modulating valve for exhaust gas recirculation control In controlling a vacuum modulating valve for EGR control, incorporating therein a temperature detecting element, a required drive signal of the vacuum modulating valve, which is obtained in accordance with operating conditions of an engine including an en... | 01/27/1987 |
| 4625702 | Exhaust gas recirculation control device for diesel engine The engine load signal, the engine speed signal, and the engine warm-up signal are directed to an electric control unit. The electric control unit issues an output signal depending on the engine condition; in the stage of engine warm-up, the output signal... | 12/02/1986 |
| 4624228 | Intake system for diesel cycle engines A diesel engine intake system including a timing valve which is positioned in the intake system in engine starting and warming-up periods under a cold engine condition. The timing valve is opened in the final period of the intake stroke so that a strong s... | 11/25/1986 |
| 4562821 | System for controlling the amount of recirculated exhaust gas for a diesel engine A method of controlling the exhaust gas recirculation for a Diesel engine by the adjustment of the sectional area of an exhaust passage connected between the exhaust and suction sides of the engine in accordance with the speed, and the engine load, which ... | 01/07/1986 |
| 4495929 | Exhaust gas recirculation system for diesel engines An exhaust gas recirculation system for diesel engines including an exhaust gas recirculation passage and a recirculation control valve for controlling the gas flow in the recirculation passage. A control circuit is provided for controlling the operation ... | 01/29/1985 |
| 4488533 | Atmospheric pressure compensation system for exhaust gas recirculation An atmospheric pressure compensation system for an exhaust gas recirculation (EGR) of an internal combustion engine comprises a vacuum source for generating vacuum of a substantially constant absolute value, an EGR valve for regulating the gas flow passin... | 12/18/1984 |
| 4466416 | Exhaust gas recirculation control method and apparatus for a diesel engine An exhaust gas recirculation method and apparatus controls the duty cycles of a throttle valve provided in an air intake passageway leading to a diesel engine, and an exhaust gas recirculation valve provided in an exhaust gas recirculation passageway conn... | 08/21/1984 |
| 4463741 | Electronically controlled exhaust gas recirculation apparatus Vacuum is applied to a pair of vacuum chambers on opposite sides of a diaphragm of an EGR valve and air flow rates from the pair of Vacuum Chambers are determined by a duty factor of an electrical control signal. A plunger driven by the diaphragm and a sl... | 08/07/1984 |
| 4462377 | Exhaust gas recirculation device An EGR device for an internal combustion engine, including an EGR valve body in an EGR pipe for changing the opening degree of the EGR pipe for regulating the amount of the recirculated exhaust gas, a diaphragm supported by casing of the EGR valve and con... | 07/31/1984 |
| 4452217 | Exhaust gas recirculation control system for a diesel engine and control method therefor In an exhaust gas recirculation control system in which a fuel injection quantity is determined on the basis of engine speed and engine load, a throttle-closed range is determined on the basis of engine speed and fuel injection quantity. An exhaust gas re... | 06/05/1984 |
| 4450824 | Exhaust gas recirculation control system with atmospheric pressure compensation valve In a diesel engine exhaust gas recirculation system wherein an exhaust gas recirculation control valve operated by an operating air pressure controls the flow resistance of the exhaust gas recirculation passage according to variation of the operating air ... | 05/29/1984 |
| 4446839 | Method and apparatus for controlling exhaust gas recirculation in a diesel engine A method and an apparatus for controlling EGR in a diesel engine according to the present invention used an EGR valve having a diaphragm chamber, a pressure supplying device for supplying air pressure to the diaphragm chamber, an adjusting device for adju... | 05/08/1984 |
| 4445488 | Exhaust gas recirculation control for diesel engine In an apparatus for controlling the EGR in a diesel engine, a single pressure control valve adjusts the control pressure from a pump automatically when the pressure changes, and supplies the control pressure in response to the command signal of a control ... | 05/01/1984 |
| 4428354 | Diesel engine fuel limiting system A fuel limit controller includes a computer supplying a commanded absolute EGR control pressure that is a measure of fuel supplied per diesel engine revolution. An absolute EGR control pressure equal to the commanded absolute pressure is generated from a ... | 01/31/1984 |
| 4411242 | Method and apparatus for controlling EGR in internal combustion engine In a method for controlling the EGR in an internal combustion engine, the fuel amount detected by a sensor is used as the basis for the control of an EGR valve in line with a predetermined EGR rate equation.... | 10/25/1983 |
| 4399799 | Engine control suitable for exhaust gas recirculation control An exhaust gas recirculation control valve is positioned by a diaphragm responsive to the difference between a control pressure and atmospheric pressure. The control pressure is adjusted so that its absolute value is maintained equal to a command which va... | 08/23/1983 |
| 4388909 | Fuel injection timing control system for a Diesel engine A fuel injection timing control system for a Diesel engine, having a fuel injection pump supplying fuel to the engine periodically according to the rotation of the engine crankshaft, and a device connected to the fuel injection pump to vary the fuel injec... | 06/21/1983 |
| 4388912 | Exhaust gas recirculation control system for a diesel engine An exhaust gas recirculation control system such that the throttle valve is controlled by two vacuum actuators through three stages of fully-opened, half-opened, and fully closed positions, in addition to the control of the exhaust gas recirculation contr... | 06/21/1983 |
| 4373496 | Apparatus for controlling an exhaust recirculation device in internal combustion engines An apparatus is proposed for controlling an exhaust recirculation device in internal combustion engines, in which a throttle device in an exhaust recirculation line is opened on the condition that the position of the load-adjusting lever of a fuel injecti... | 02/15/1983 |
| 4369753 | Pressure mediated diesel engine exhaust gas recirculation control system A diesel engine includes an air intake system, an exhaust system, and an exhaust gas recirculation conduit which leads from the exhaust system to the intake system. An exhaust gas recirculation control valve, which includes a first diaphragm chamber, is m... | 01/25/1983 |
| 4349004 | Exhaust gas recirculation apparatus for diesel engine A predetermined amount of exhaust gas recirculation is constantly provided through a first passageway (21) connected between an engine intake manifold (12) and an exhaust manifold (13). A vacuum actuated valve (19) constitutes a second passageway which is... | 09/14/1982 |
| 4333438 | Device for recycling exhaust gases for a diesel engine The device comprises an induction pipe and an exhaust pipe interconnected by a connecting pipe. A closure member controlled in accordance with the conditions of operation of the engine is inserted in the connecting pipe. The connecting pipe is connected t... | 06/08/1982 |
| 4280470 | Three-step exhaust gas recirculation control system An exhaust gas recirculation control system for particular application to a diesel engine, which has an exhaust gas recirculation control valve, and a means for actuating the exhaust gas recirculation control valve, which positions the exhaust gas recircu... | 07/28/1981 |
| 4208995 | Fuel injection fuel flow control system FIGS. 1a, 1b, 1c, 1d, and 1e collectively schematically illustrate a fuel injection control system for an internal combustion engine having a fuel pump 38 that has a fuel flow output that varies as a direct function of engine speed, an air/fuel ratio cont... | 06/24/1980 |
| 4094287 | Exhaust gas recirculation system An exhaust gas recirculation system (EGR system) with an EGR valve means for controlling the amount of the exhaust gas to be recirculated into an intake system in an internal combustion engine, said EGR valve means comprising an intake system vacuum opera... | 06/13/1978 |
