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| Number | Title | Issue Date |
| 8087402 | Method and device for the operation of an internal combustion engine comprising an exhaust-gas turbocharger In order to operate an internal combustion engine with a turbocharger, a boost pressure prevailing downstream of a compressor (42) of the exhaust gas turbocharger and upstream of a cylinder intake port of the internal combustion engine is regulated to a prede... | 01/03/2012 |
| 7895993 | Internal combustion engine having exhaust gas recirculation The present invention relates to an internal combustion engine (1), in particular for a vehicle, having at least one exhaust gas recirculation line (13) for externally recirculating exhaust gases from an exhaust gas side of the internal combustion engi... | 03/01/2011 |
| 7814893 | Exhaust gas recirculation system module with integral vacuum A system module is provided for recirculating exhaust gases from an internal combustion engine to an intake manifold of the internal combustion engine. The module includes a body (12) including a passageway (41) between an exhaust gas inlet (32)... | 10/19/2010 |
| 7404540 | Primary pole piece for a solenoid actuator A primary pole piece (PPP) for an electrical solenoid linear actuator includes an inner skirt portion extending axially from a radial flange portion and having a substantially uniform cylindrical thickness and a non-uniform axial length. The skirt is formed into a p... | 07/29/2008 |
| 7398774 | Force balanced linear solenoid valves An electronic exhaust gas recirculation valve for an internal combustion engine selectably provides a recirculation path from engine exhaust to engine intake. A main spring biases the valve in a closed position. The main spring acts on a main spring receiving surfac... | 07/15/2008 |
| 7323960 | Electromagnetostrictive actuator An actuator includes an electromagnetostrictive element that has one end located on a front side and the other end located on a rear side. An output shaft penetrates the electromagnetostrictive element and is pressurized toward the rear side of the electromagnetostr... | 01/29/2008 |
| 7280021 | Linear solenoid designed to ensure required amount of magnetic attraction and solenoid valve using same A linear solenoid is provided which works to pull a plunger to a stator magnetically. The plunger and the stator are aligned to have ends opposed to each other. The end of the stator has formed therein a recess into which the end of the plunger is insertable. The re... | 10/09/2007 |
| 7209020 | Variable force solenoid A variable force solenoid is described, wherein the solenoid has a relatively long stroke and a relatively low profile. The solenoid includes an armature with at least one tapered surface and a pole piece with at least one tapered surface. The armature and the pole ... | 04/24/2007 |
| 7139219 | Hydraulic impulse generator and frequency sweep mechanism for borehole applications This invention discloses a valve that generates a hydraulic negative pressure pulse and a frequency modulator for the creation of a powerful, broadband swept impulse seismic signal at the drill bit during drilling operations. The signal can be received at monitoring... | 11/21/2006 |
| 7124998 | Electromagnetically actuated gas valve An electromagnetically actuated gas valve (5) for gas engines (4) includes a valve seat (13) that has at least one flow-through opening (14) and a corresponding sealing plate (15), with the sealing plate being movably arranged and ... | 10/24/2006 |
| 7104522 | Coking-resistant shaft/bushing mechanism for an exhaust gas recirculation valve An exhaust gas recirculation valve assembly including a bushing and pintle shaft sub-assembly having a pintle shaft supported by a sleeve bushing, the contact area between the shaft and bushing being reduced such that coking deposits that form on the remaining conta... | 09/12/2006 |
| 7086614 | Fuel injector A fuel injector is described for fuel injection systems in internal combustion engines that includes a magnet coil, an armature that is acted upon in a closing direction by a restoring spring, and a valve needle that is non-positively engaged with armature for actua... | 08/08/2006 |
| 7047957 | Method and apparatus for monitoring a multiple step valve lifter A method and system for monitoring performance of an internal combustion engine equipped with individually actuated valve control mechanisms, such as a two-step finger-follower rocker-arm assembly, using a strategy that identifies cylinder-to-cylinder variations, is... | 05/23/2006 |
| 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 |
| 7044111 | Purge valve having permanent magnet armature A purge valve for an evaporative emission control system. The purge valve includes an actuator, a valve body, and a valve closure member disposed in the valve body. The actuator is disposed along a longitudinal axis, and includes an electromagnetic coil having a hol... | 05/16/2006 |
| 7011081 | Double-pintle emission control valve having a one-piece double-seat element A cylindrical-walled seat element (50) in a double-pintle (42) EEGR valve (20) is a machined metal part in which two substantially identical apertures (62, 64) collectively span essentially a semi-circumference of the seat element wall ( | 03/14/2006 |
| 6964270 | Dual mode EGR valve A preferred embodiment EGR valve permits exhaust gas to be induced into the intake line downstream of the compressor, while minimizing the need to reduce the size of the turbocharger. The preferred embodiment EGR valve exploits variations around the mean pressure in... | 11/15/2005 |
| 6955336 | Sleeveless solenoid for a linear actuator An improved electric solenoid for providing linear mechanical actuation. The outer polepiece of the solenoid is provided with an axial, self-lubricated, non-magnetic bearing for closely supporting and centering an actuating shaft extending coaxially from the solenoi... | 10/18/2005 |
| 6943657 | Solenoid and valve assembly having a linear output A solenoid assembly is used with a valve assembly to regulate the flow of fluid therethrough. The solenoid assembly includes a solenoid frame extending between a first end and a second end. A primary plate is disposed adjacent the first end of the solenoid frame. Th... | 09/13/2005 |
| 6904897 | Bearing porosity control in an exhaust gas recirculation valve A powdered metal bearing (40) that guides a pintle (42) in an EGR valve (20) is sealed against infiltration of exhaust gases by mechanical processing or by applying a sealant. ... | 06/14/2005 |
| 6895752 | Method and apparatus for exhaust gas recirculation cooling using a vortex tube to cool recirculated exhaust gases An engine includes an exhaust conduit, an intake conduit, and a vortex tube disposed between the exhaust conduit and the intake conduit. The vortex tube has an inlet in fluid communication with the exhaust conduit, a cold gas outlet in fluid communication with the i... | 05/24/2005 |
| 6622704 | Device for exhaust gas recirculation into the air intake region of motor vehicle internal combustion engines For reduction of toxic components in exhaust gases of internal combustion engines, particularly of nitrogen oxides in motor vehicles, a portion of the exhaust gases, essentially operating as inert gases, are recirculated into the combustion chamber of the... | 09/23/2003 |
| 6502556 | Process for exhaust gas recirculation into the air intake region of motor vehicle internal combustion engines and device therefor For reductions of toxic components in exhaust gases of internal combustion engines, particularly of nitrogen oxides in motor vehicles, a portion of the exhaust gases, essentially operating as inert gases, are recirculated into the combustion chamber of th... | 01/07/2003 |
| 6481424 | Valve shaft scraper and filter for preventing coking A valve shaft scraping and filtering device for use in an engine valve includes a woven mesh annulus disposed within a valve assembly and surrounding the valve shaft such that the annulus gently scrapes the valve shaft as the valve shaft reciprocates with... | 11/19/2002 |
| 6422216 | Exhaust gas recirculation valve A hydraulically actuated exhaust gas recirculation valve assembly for metering exhaust gas to the intake of an internal combustion engine. The exhaust gas recirculation valve assembly includes a base having an internal cavity with a control portion and a ... | 07/23/2002 |
| 6415776 | EGR system using pressure-based feedback control An EGR system using pressure-based feedback control includes an actuator for moving an EGR valve between a closed position and an open position, and a position sensor for detecting the position of the EGR valve and generating a position output signal. A p... | 07/09/2002 |
| 6345612 | Exhaust gas recirculation arrangement including a disc valve In an exhaust gas recirculation arrangement comprising a housing forming a passage for an exhaust gas flow of an internal combustion engine and having a valve seat with a valve disc movably supported in the housing on a valve stem so as to be seated on th... | 02/12/2002 |
| 6343594 | Variable flow venturi assembly for use in an exhaust gas recirculation system of an internal combustion engine A variable flow venturi assembly for use in an exhaust gas recirculation system of an internal combustion engine having a housing with an inner chamber, a combustion air inlet in communication with the inner chamber, and an exhaust gas inlet in communicat... | 02/05/2002 |
| 6293266 | Exhaust gas recirculation device An exhaust gas recirculation device for recirculating exhaust gas into a gas feed to engines, especially motor vehicle engines, having an exhaust gas feed, a fresh gas feed and an outlet duct opening into the gas feed, where at least the exhaust gas feed ... | 09/25/2001 |
| 6189519 | Short stroke solenoid actuated EGR valve A simplified EGR valve for automotive engines is actuated by compact single or dual solenoids having a short stroke. The short stroke is made possible by one or more annular orifices in a preferably flat valve seat or valve plate, the orifices being fed f... | 02/20/2001 |
| 6182684 | Bellows balanced valve A bellows valve assembly installed in a fluid pathway includes a valve body, a bellows housing positioned adjacent the valve body, and a valve actuator. The valve body is equipped with an inlet, an outlet, a valve bore positioned between the inlet and the... | 02/06/2001 |
| 6182646 | Electromechanically actuated solenoid exhaust gas recirculation valve A closed-loop controlled system solenoid actuated EGR valve includes an engine mount for attachment to a vehicle engine, a valve housing to which the engine mount is attached, a motor housing positioned above the valve housing, and a sensor housing. The v... | 02/06/2001 |
| 6119725 | Valve device A fixing unit has a crown-shaped resilient member comprising an annular cylindrical member and a flange extending integrally from an upper end of the annular cylindrical member. The annular cylindrical member has a first tooth, and the flange has a second... | 09/19/2000 |
| 6112729 | Device for controlling exhaust gas recirculation in an internal combustion engine The present invention is an apparatus for controlling exhaust gas recirculation in an internal combustion engine. The apparatus includes an exhaust gas recirculation controller that uses sensed engine operating parameters and the engine operational mode t... | 09/05/2000 |
| 6079387 | Air intake control system for engine equipped with exhaust gas recirculation feature An air intake control system for an engine equipped with an exhaust gas recirculation feature controls an exhaust gas recirculation valve according to an amount of air charge dictated by an amount of intake air detected by an air flow sensor to deliver a ... | 06/27/2000 |
| 6053473 | Valve apparatus A coupling means comprises a first retainer and a second retainer. The first and second retainers are fastened to a first annular groove and a second annular groove of a valve stem respectively, and they are fixed by an energizing action in the vertical d... | 04/25/2000 |
| 6050248 | Exhaust gas recirculation valve powered by pressure from an oil pump that powers a hydraulically actuated fuel injector An engine assembly includes a valve assembly which selectively enables exhaust gas to be recirculated from an engine exhaust outlet to an engine air inlet. The valve assembly is positionable between a first valve position and a second valve position. The ... | 04/18/2000 |
| 6047690 | Exhaust gas recirculation valve An exhaust gas recirculation valve (10) for installation between an air intake (12) and an exhaust of an engine comprising a housing (18) having a first (20), second (22), and third (24) sides, a first bore (26) opening through the first side for connecti... | 04/11/2000 |
| 6039025 | Internal combustion engine A cylinder direct injection spark-ignition internal combustion engine comprising an EGR system is provided to control an amount of EGR gas recirculated from an exhaust gas passage to an intake air passage in which a throttle valve is disposed. The EGR sys... | 03/21/2000 |
| 6029622 | Fuel control method and system for cylinder injection type internal combustion engine A fuel control system for a cylinder injection type internal combustion engine which allows the fuel injection mode to make transition from a compression-stroke injection mode for realizing a high air-fuel ratio to the suction-stroke injection mode for re... | 02/29/2000 |
