Patent application number | Description | Published |
20080196401 | Exhaust heat recovery apparatus - An exhaust heat recovery apparatus includes an evaporation unit, a condensation unit, an evaporation-side communication part and a condensation-side communication part. The evaporation unit is disposed in an exhaust gas passage through which an exhaust gas flows and performs heat exchange between the exhaust gas and an operation fluid flowing therein, thereby evaporating the operation fluid. The condensation unit is disposed in a coolant passage through which an engine coolant flows and performs heat exchange between the operation fluid and the engine coolant, thereby condensing the operation fluid. The evaporation-side communication part connects the evaporation unit and the condensation unit for introducing evaporated operation fluid to the condensation unit. The condensation-side communication part connects the condensation unit and the evaporation unit for introducing condensed operation fluid to the evaporation unit. The condensation-side communication part is provided with a throttle part. | 08-21-2008 |
20090000285 | Exhaust heat recovery device - An exhaust heat recovery device includes an evaporator disposed to evaporate a working fluid by exchanging heat between a heating fluid and the working fluid, a condenser disposed to cool and condense the working fluid by exchanging heat between a fluid to be heated and the working fluid evaporated by the evaporator, an evaporation side connection portion for guiding the working fluid evaporated by the evaporator to the condenser, and a condensation side connection portion for guiding the working fluid condensed by the condenser to the evaporator. Furthermore, at least one of the evaporation side connection portion and the condensation side connection portion has a curved portion. | 01-01-2009 |
20090032213 | Exhaust heat recovery apparatus - An exhaust heat recovery apparatus includes an evaporation unit, a condensation unit, an evaporation-side communication part and a condensation-side communication part. The evaporation unit is disposed in a duct member through which an exhaust gas generated from an engine flows, and evaporates an operation fluid by heat of the exhaust gas. The condensation unit is disposed in a coolant passage through which a coolant flows, and condenses the operation fluid by radiating the heat to the coolant. The evaporation-side communication part connects the evaporation unit and the condensation unit for introducing evaporated operation fluid to the condensation unit. The condensation-side communication part connects the condensation unit and the evaporation unit for introducing condensed operation fluid to the evaporation unit. The condensation-side communication part is in contact with an outer surface of the duct member at least at a part. | 02-05-2009 |
20090065184 | Heat exchanger - A heat exchanger has a core and header tanks. The core includes passage units stacked in a unit sacking direction and fins. Each passage unit includes a first passage member and a second passage member connected to each other such that a second fluid passage is provided therein. The passage units are stacked such that first fluid passages are provided between bent portions of the first and second passage members of the adjacent passage units. The fins are disposed inside of the passage units and held by the bent portions of the first and second passage members. The core has core end walls constructed of at least one of first side walls of the first passage members and second side walls of the second passage members. The header tanks are disposed at ends of the core and provide tank inner spaces with the core end walls. | 03-12-2009 |
20090293461 | Exhaust Heat Recovery Device - An exhaust heat recovery device includes an accommodating portion extending continuously without shrinking a section therein and adapted to allow exhaust gas of an internal combustion engine to pass therethrough, a catalyst disposed in the accommodating portion for cleaning the exhaust gas, an evaporator disposed adjacent to the catalyst on a downstream side of an exhaust gas flow in the accommodating portion, and a condenser for condensing the working medium by radiating heat of the working medium flowing thereinto from the evaporator so as to recover exhaust heat on the coolant side. The condenser is located to return the condensed working medium to the evaporator. | 12-03-2009 |
20100044019 | Heat exchanger - Heat is exchanged between exhaust gas passing through a plurality of tubes and cooling water passing through a plurality of passages defined outside of the plurality of tubes layered with each other. A heat exchanger includes a temperature decreasing portion arranged in a predetermined area on an outer surface of the tube adjacent to an inlet side of exhaust gas. The temperature decreasing portion is configured to decrease a temperature of a thermal boundary layer of the outer surface of the tube relative to cooling water by increasing a heat transmitting ratio between the outer surface of the tube and cooling water. | 02-25-2010 |
20100146943 | Exhaust heat recovery device - An exhaust heat recovery device is provided with an evaporation portion for evaporating an operation fluid flowing therein by performing heat exchange with exhaust gas of an engine, a condensation portion for condensing the operation fluid flowing from the evaporation portion by performing heat exchange with coolant of the engine, and a flow adjusting portion for adjusting a flow amount of the operation fluid flowing from the condensation portion to the evaporation portion. A catalyst temperature detector is adapted to detect a temperature of a catalyst for purifying the exhaust gas, and a control unit sets a catalyst heating mode when the detected temperature of the catalyst is lower than a threshold value. Furthermore, the control unit causes the flow adjusting portion to adjust the flow amount of the operation fluid from the condensation portion to the evaporation portion at zero, in the catalyst heating mode. | 06-17-2010 |
20110247318 | Exhaust heat exchanger - An exhaust heat exchanger includes a water tank accommodating tubes and having an outside space defined outside of the tubes, a gas tank having an exhaust passage and an outside space defined outside of the exhaust passage, a dividing portion to separate the outside space of the water tank from the exhaust passage of the gas tank, and a communication portion. The outside space of the gas tank and the outside space of the water tank communicate with each other through the communication portion. | 10-13-2011 |