Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F02Combustion engines F02MSUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF

F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture

F02M26/01Internal exhaust gas recirculation F02M26/02EGR systems specially adapted for supercharged engines F02M26/03with a single mechanically or electrically driven intake charge compressor F02M26/04with a single turbocharger F02M26/05High pressure loops F02M26/06Low pressure loops F02M26/07Mixed pressure loops F02M26/08for engines having two or more intake charge compressors or exhaust gas turbines F02M26/09Constructional details F02M26/10having means to increase the pressure difference between the exhaust and intake system F02M26/11Manufacture or assembly of EGR systems Materials or coatings specially adapted for EGR systems F02M26/12characterised by means for attaching parts of an EGR system to each other or to engine parts F02M26/13Arrangement or layout of EGR passages F02M26/14in relation to the exhaust system F02M26/15in relation to engine exhaust purifying apparatus F02M26/16with EGR valves located at or near the connection to the exhaust system F02M26/17in relation to the intake system F02M26/18Thermal insulation or heat protection F02M26/19Means for improving the mixing of air and recirculated exhaust gases F02M26/20Feeding recirculated exhaust gases directly into the combustion chambers or into the intake runners F02M26/21with EGR valves located at or near the connection to the intake system F02M26/22with coolers in the recirculation passage F02M26/23Layout F02M26/24with two or more coolers F02M26/25with coolers having bypasses F02M26/26characterised by details of the bypass valve F02M26/27with air-cooled heat exchangers F02M26/28with liquid-cooled heat exchangers F02M26/29Constructional details of the coolers F02M26/30Connections of coolers to other devices F02M26/31Air-cooled heat exchangers F02M26/32Liquid-cooled heat exchangers F02M26/33controlling the temperature of the recirculated gases F02M26/34with compressors, turbines or the like in the recirculation passage F02M26/35with means for cleaning or treating the recirculated gases F02M26/36with means for adding fluids other than exhaust gas to the recirculation passage with reformers F02M26/37with temporary storage of recirculated exhaust gas F02M26/38with two or more EGR valves disposed in parallel F02M26/39with two or more EGR valves disposed in series F02M26/40with timing means in the recirculation passage F02M26/41characterised by the arrangement of the recirculation passage in relation to the engine F02M26/42having two or more EGR passages EGR systems specially adapted for engines having two or more cylinders F02M26/43in which exhaust from only one cylinder or only a group of cylinders is directed to the intake of the engine F02M26/44in which a main EGR passage is branched into multiple passages F02M26/45Sensors specially adapted for EGR systems F02M26/46for determining the characteristics of gases F02M26/47the characteristics being temperatures, pressures or flow rates F02M26/48EGR valve position sensors F02M26/49Detecting, diagnosing or indicating an abnormal function of the EGR system F02M26/50Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities F02M26/51EGR valves combined with other devices F02M26/52Systems for actuating EGR valves F02M26/53using electric actuators F02M26/54Rotary actuators F02M26/55using vacuum actuators F02M26/56having pressure modulation valves F02M26/57using electronic means F02M26/58Constructional details of the actuator Mounting thereof F02M26/59using positive pressure actuators Check valves therefor F02M26/60in response to air intake pressure F02M26/61in response to exhaust pressure F02M26/615the exhaust back pressure F02M26/62in response to fuel pressure F02M26/63the EGR valve being directly controlled by an operator F02M26/64the EGR valve being operated together with an intake air throttle F02M26/65Constructional details of EGR valves F02M26/66Lift valves F02M26/67Pintles Spindles Springs Bearings Sealings Connections to actuators F02M26/68Closing members Valve seats Flow passages F02M26/69having two or more valve-closing members F02M26/70Flap valves Rotary valves Sliding valves Resilient valves F02M26/71Multi-way valves F02M26/72Housings F02M26/73with means for heating or cooling the EGR valve F02M26/74Protection from damage