Patent application number | Description | Published |
20090235662 | MODULATING FLOW THROUGH AN EXHAUST GAS RECIRCULATION COOLER TO MAINTAIN GAS FLOW VELOCITIES CONDUCIVE TO REDUCING DEPOSIT BUILD-UPS - A heat exchanger of motor vehicle processes a gas flow including combustion exhaust gas. Combustion by-product deposit build-up within the heat exchanger is reduced by maintaining a minimum gas flow velocity within the heat exchanger by reducing heat exchanger total gas flow cross section to locally increase a gas flow velocity. | 09-24-2009 |
20100186783 | EXHAUST GAS RECIRCULATION COOLER CLEANER HAVING ACTIVE MATERIAL ACTUATOR - A cleaning mechanism for and method of autonomously removing deposits from the interior surface of a tube comprises a cleaning member secured relative to the surface and preferably, an active material element drivenly coupled to or engaged with the member so as to selectively cause the member to translate, thereby removing deposits from the surface. | 07-29-2010 |
20110271661 | HEAT EXCHANGER METHOD AND APPARATUS FOR ENGINE EXHAUST GAS RECIRCULATION SYSTEM - A method for operating an internal combustion engine configured to operate lean of stoichiometry includes reducing temperature of a portion of an exhaust gas feedstream recirculated to an intake system of the engine, and reducing mass flowrate of particulate matter and hydrocarbons borne in the recirculated portion of the exhaust gas feedstream upstream of the heat exchanger effective to reduce deposition of particulate matter and hydrocarbons onto and adhesion to surface areas of the heat exchanger. | 11-10-2011 |
20110271937 | HEAT EXCHANGER METHOD AND APPARATUS FOR ENGINE EXHAUST GASES - A heat exchanger device for an exhaust gas recirculation system of an internal combustion engine includes a heat exchange device including a first surface and a second surface. The first surface is in fluid contact with a recirculated portion of exhaust gas flowing in an exhaust system and the second surface is in fluid contact with a second fluid. The first surface is subjected to a surface treatment effective to reduce adhesive properties that relate to surface tension of particulate matter that precipitates from the recirculated portion of the exhaust gas. | 11-10-2011 |
20130055991 | EXHAUST GAS RECIRCULATION SYSTEM HAVING ACTIVE MATERIAL ACTUATED BY-PASS - An exhaust gas recirculation system adapted for use by an internal combustion engine, and for selectively diverting a recirculated portion of the engine exhaust away from the EGR cooler, includes a by-pass conduit and/or feed line shiftable between open and closed conditions, and an active material actuator. | 03-07-2013 |
20130312716 | METHOD AND APPARATUS FOR MONITORING PERFORMANCE OF EGR HEAT EXCHANGER - An internal combustion engine is equipped with an EGR system that includes an EGR heat exchanger. A method for monitoring the EGR heat exchanger includes monitoring an EGR gas inlet temperature to the EGR heat exchanger, an EGR gas outlet temperature from the EGR heat exchanger, a coolant temperature and a mass EGR flowrate through the EGR heat exchanger for a present engine operating point. An actual thermal effectiveness of the EGR heat exchanger for the present engine operating point is determined. A maximum heat transfer coefficient for the EGR side of the EGR heat exchanger is determined for the present engine operating point. The EGR heat exchanger is regenerated when the actual heat transfer coefficient differs from the maximum heat transfer coefficient for the present engine operating point. | 11-28-2013 |
20140020361 | EXHAUST GAS RECIRCULATION COOLER WITH A HEATED FILTER - An apparatus for mitigating fouling within a heat exchanger device includes an internal combustion engine fluidly coupled to an intake manifold upstream of the engine and an exhaust gas manifold downstream of the engine. The apparatus further includes an external exhaust gas recirculation circuit fluidly coupled to the exhaust gas manifold at a first end and configured to selectively route exhaust gas flow into the intake manifold at a second end. The exhaust gas recirculation circuit includes the heat exchanger device for cooling the EGR flow prior to entering the intake manifold, and a deposit filter fluidly coupled upstream of the heat exchanger device and configured to trap combustion by-products within the EGR flow. | 01-23-2014 |
20140020362 | METHOD AND APPARATUS TO RECOVER EXHAUST GAS RECIRCULATION COOLERS - An apparatus for mitigating fouling within a heat exchanger device includes an internal combustion engine and an external exhaust gas recirculation (EGR) circuit. The internal combustion engine is fluidly coupled to an intake gas manifold upstream of the engine and an exhaust gas manifold downstream of the engine. The EGR circuit is fluidly coupled to the exhaust gas manifold at a first end and is configured to selectively route back exhaust gas flow as EGR flow into the intake gas manifold at a second end. The EGR circuit includes the heat exchanger device for cooling the EGR flow prior to entering the intake manifold and a surface deposit removing device configured to remove surface deposit build-up from within the heat exchanger device when the surface deposit removing device is activated. | 01-23-2014 |
20150068502 | EXHAUST GAS RECIRCULATION COOLER AND SYSTEM - An exhaust gas recirculation (EGR) cooler for cooling exhaust gas via a coolant includes at least one channel having an inlet and an outlet, and a casing defining a cooling chamber for carrying the coolant around the at least one channel. The exhaust gas is flowable through the at least one channel from the inlet to the outlet. At least a portion of the at least one channel is variable between a fully compressed position and an uncompressed position. The casing includes a coolant inlet and a coolant outlet through which the coolant enters and exits the cooling chamber. The casing also includes an exhaust gas inlet from which the exhaust gas enters the at least one channel, and an exhaust gas outlet into which the exhaust gas exits the at least one channel. | 03-12-2015 |