Abstract: The present invention provides a waste heat recovering device capable of recovering waste heat with good efficiency from various heat sources in an internal combustion engine.

Abstract: A system is provided for inerting a volume in a vehicle has at least one exhaust gas extraction point on at least one internal combustion engine of the vehicle, and exhaust gas line for routing exhaust gas from the exhaust gas extraction point to the volume, and at least one exhaust gas inlet on the volume for introducing exhaust gas to generate a low-activity environment in the volume. Precisely in vehicles with internal combustion engines, using exhaust gas for inerting a volume makes it possible to suggest an especially simple, cost-effective and robust solution to guard against the formation of an ignitable mixture in the volume or the like.

Abstract: A method for managing thermal energy in an internal combustion engine including an exhaust gas recirculation system and an engine cooling system includes recirculating a portion of an exhaust gas through the exhaust gas recirculation system that is in thermal communication with a first side of a thermoelectric device, flowing an engine coolant into thermal communication with a second side of a thermoelectric device, and controlling electric current between an electrical energy storage device and the thermoelectric device to transfer thermal energy between the recirculated exhaust gas and the engine coolant.

Abstract: An exhaust gas purification apparatus including a first exhaust gas treatment member carrying an oxidation catalyst, a three-way catalyst, or a NOx storage reduction catalyst which is used for purifying exhaust gas from an internal combustion engine, a second exhaust gas treatment member having a hydrocarbon (“HC”) storing function disposed on the downstream side of the first exhaust gas treatment member, and a heat dissipating unit disposed between the first exhaust gas treatment member and the second exhaust gas treatment member. An upstream side of the heat dissipating unit is formed into a heat insulating structure, and a further upstream side thereof is formed into a heat retaining structure. Even when an internal combustion engine is accelerating, the exhaust gas flowing into the HC adsorption material can be cooled efficiently and HC can be adsorbed before the temperature of the three-way catalyst or the NOx purification catalyst rises to an HC light-off temperature.

Abstract: An energy harvesting system includes a heat engine and a component. The heat engine includes first and second regions, a conduit, and a shape memory alloy (SMA) material. The conduit extends along a central axis. The SMA material surrounds the conduit and is disposed in one of the regions. The SMA material is radially spaced from a secondary axis that surrounds the central axis. A localized region of the SMA material changes crystallographic phase from martensite to austenite and contract in response to exposure to the first temperature. The localized region of the SMA material also changes crystallographic phase from austenite to martensite and expands in response to exposure to the second temperature. The SMA material rotates about the secondary axis in response to the contraction and expansion of the localized region of the SMA material. Rotation of the SMA material about the secondary axis drives the component.

Abstract: The present invention provides an exhaust cooler mounted to a tailpipe for receiving exhaust gas. The exhaust cooler includes a jet pump connectable to the tailpipe and a nozzle connectable to the tailpipe. The nozzle defines a nozzle opening between the tailpipe and the jet pump for communicating the exhaust gas from the tailpipe to the jet pump. A first throttle member is included that is moveable between a closed position and an open position, the open position defining a first opening between the tailpipe and the jet pump for communicating the exhaust gas from the tailpipe to the jet pump.

Abstract: An exhaust gas line (1) of an internal combustion engine includes at least one catalytic converter (2) which is provided with at least one catalytic converter support (4) which is arranged in the housing (3) and which includes at least one first and one second area (5, 6) which can be flowed through in parallel, with the flow being capable of being deactivated in at least one area by a switching device (8) arranged in the exhaust gas line (1). In order to achieve a rapid activation of the catalytic converter in the simplest possible and most compact way, the areas (5, 6) of the catalytic converter support (4) have different physical and/or chemical properties in relation to response behavior, permeability, catalytic activity and/or thermal inertia.

Abstract: An exhaust gas post processing system may include an exhaust pipe in which an exhaust gas from an engine passes, a catalyst that may be disposed at the exhaust pipe so as to decrease a harmful material of the exhaust gas, and a water jacket that may be formed around an exhaust pipe that may be disposed at an upstream side of the catalyst of the exhaust pipe, wherein a coolant may be selectively supplied into the water jacket such that the water jacket cools down the exhaust gas passing the exhaust pipe and thus the catalyst does not be over heated.

Abstract: An exhaust heating device for heating an exhaust gas led to an exhaust purifying device from an engine is disposed in a second exhaust passage that is located upstream of a confluent portion of a first exhaust passage connected through a turbine of a first turbocharger to the purifying device and the second passage connected to the purifying device through a turbine of a second turbocharger used primarily in a lower speed range of the engine than the first turbocharger in a state of bypassing the turbine of the first turbocharger and downstream of the turbine of the second turbocharger. A valve for regulating a flow of the exhaust gas in the second passage is disposed in the second passage that is located downstream of a branched portion of the first and second passages and upstream of the turbine of the second turbocharger.

Abstract: In one exemplary embodiment of the invention a method for controlling a speed of an internal combustion engine includes shutting off fuel flow into a cylinder to reduce the speed of the internal combustion engine. The method also includes providing an electrical load to an alternator of the internal combustion engine, further reducing the speed of the internal combustion engine.

Abstract: An exhaust gas system for an internal combustion engine has a thermoelectric power generator with a hot side and a cold side. The hot side is arranged on the exhaust gas system and is heatable by exhaust gas of the internal combustion engine. A first heat exchanger having a first thermal conductivity is arranged between the hot side and the exhaust gas flow. At least a second thermoelectric power generator is arranged on the exhaust gas system and has a second heat exchanger with a thermal conductivity that is different from the first thermal conductivity. The arrangement of thermoelectric power generators can generate electric power over a significantly wider operating point range of the internal combustion engine.

Abstract: According to one representative embodiment, an aspirator for cooling exhaust gas from an internal combustion engine includes a nozzle section, an expansion section, and an air entrainment section. The nozzle section is communicable in exhaust receiving communication with the internal combustion engine. The nozzle section includes a plurality of nozzles through which an exhaust gas stream is flowable. The expansion section is communicable in exhaust receiving communication with the plurality of nozzles. The air entrainment section is communicable in air supplying communication with the expansion section. The air is mixable with the exhaust gas within the expansion section.

Abstract: An internal combustion engine in which first and second turbochargers are incorporated in series has first and second bypass passages bypassing exhaust turbines of the first and second turbochargers and two opening/closing valves for opening/closing the first and second bypass passages respectively. An exhaust gas heating device for heating exhaust gas being led to an exhaust purifying device from the engine is disposed in an exhaust passage so as to be located upstream of a confluent portion of the exhaust passage and the second bypass passage and downstream of the turbine of the second turbocharger. A valve capable of regulating the flow rate of exhaust gas flowing in the exhaust passage is disposed in the exhaust passage so as to be located downstream of a branched portion of the exhaust passage and the second bypass passage and upstream of the turbine of the second turbocharger.

Abstract: An exhaust purification system of an internal combustion engine is provided with an exhaust treatment device which purifies exhaust, a fuel feed device which is arranged at an upstream side from the exhaust treatment device and which feeds fuel to the engine exhaust passage, an ignition device which causes fuel which is fed from the fuel feed device to ignite, and a flow regulating device which regulates the flow rate of exhaust gas which flows toward the ignition device. The fuel feed device is formed so as to feed liquid fuel. The system has an operating region in which due to the fuel which is fed to the engine exhaust passage burning, backflow of the exhaust gas occurs. Fuel is made to burn in the operating region. Further control is performed to make the flow rate of the exhaust gas increase during the period from when combustion of fuel should be started to when combustion of the fuel ends.

Abstract: An exhaust system comprises an exhaust driven turbocharger having an outlet and a flanged portion that extends about the outlet, an exhaust treatment device comprising a canister having an inlet cone that includes an integral inlet flange defining an the inlet opening configured to define a seal with the flanged portion that extends about the outlet of the turbocharger and a substrate disposed within the canister through which the exhaust gas flows. An exhaust gas passage, fluidly couples the turbocharger and the exhaust treatment device and allows for the passage of exhaust gas therebetween and a flow modifier comprising a radially inwardly extending wall portion extends from an inner wall of the exhaust gas passage and directs the exhaust gas away from an outer radius of the exhaust gas passage to evenly distribute the exhaust gas across the an inlet face of the substrate.

Abstract: An exhaust processing device includes a main body tube portion and a closing tube portion. The main body tube portion includes an opening in an axial end thereof, houses a main body exhaust path in an inside thereof, which allows an exhaust gas to pass therethrough. The closing tube portion includes a plate portion and a tubular portion. The plate portion covers the opening of the axial end of the main body tube portion. The tubular portion radially outwardly protrudes from an outer peripheral surface of the main body tube portion, and is integrated with the plate portion. The tubular portion houses an exhaust path in an inside thereof, which communicates with the main body exhaust path. The tubular portion of the closing tube portion includes a first split half portion integrally molded with the plate portion, and a second split half portion joined to the first split half portion.

Abstract: An exhaust post-treatment device (2) for a vehicle (4) for reducing nitrogen oxides present in the exhaust gases (20) of the vehicle (4) by supply of liquid reducing agent (18) to the exhaust gases (20) in an exhaust pipe (32). The device (2) locally warms a surface (31) within the exhaust pipe (32) by a Peltier element (6) by using thermal energy from the exhaust gases (20) to vaporize liquid reducing agent (18) which reaches the surface (31), thereby avoiding the formation of deposits of reducing agent within the exhaust pipe (32). Also a method for post-treatment of exhaust gases from vehicles with an exhaust post-treatment device (2) including a Peltier element (6).

Abstract: The present disclosure describes systems and methods to increase the speed of engine warm up by heating oil with a thermoelectric device and also to generate electricity using the same thermoelectric device, exploiting a temperature gradient between engine oil and exhaust gases. The disclosure describes a vehicle engine, comprising: an engine oil reservoir; an exhaust gas system; and a thermoelectric device having a hot side and a cold side and connected to a battery, wherein, the thermoelectric device is configured such that the hot side is thermally coupled to the exhaust gas system and the cold side is thermally coupled to the engine oil reservoir. A diverter valve and duct are provided in the exhaust gas system to selectively convey exhaust gases to the thermoelectric device located in or adjacent to the engine oil reservoir.

Abstract: According to one embodiment, described herein is an apparatus for mitigating on-board diagnostic (OBD) faults generated by an OBD system of an internal combustion engine (ICE) system having a selective catalytic reduction system with a diesel exhaust fluid (DEF) decomposition tube. The apparatus includes a fault mitigation module that is configured to monitor at least one OBD signal of the OBD system and issue a request for regenerating the DEF decomposition tube when a value of the at least one OBD signal reaches a predetermined regeneration threshold corresponding with the at least one OBD signal. The regeneration threshold is reachable prior to an OBD fault threshold corresponding with the at least one OBD signal. The apparatus also includes a regeneration module that is configured to regenerate the DEF decomposition tube according to the issued request.

Abstract: The present invention provides an exhaust heat recovery device configured to perform heat exchange between three media such as, exhaust gas, coolant, and oil. According to preferred embodiments of the present invention, the exhaust heat recovery device is configured such that the heat of exhaust gas discharged from an engine is transmitted to the coolant and the oil at the same time and direct heat exchange between the coolant and the oil is made, thereby simultaneously increasing the temperature of the coolant and the oil during the initial start-up of the engine (fast warm-up). As a result, it is possible to reduce friction loss of powertrain, thereby improving fuel efficiency. Accordingly, an object of the present invention is to provide an exhaust heat recovery device which is configured to perform the integral heat exchange between the exhaust gas, the coolant, and the oil.

Abstract: A waste heat recovery apparatus and process for use with an internal combustion engine includes a thermo electric apparatus that connects to components of the internal combustion engine to transfer heat between components, generate electric energy from heat extracted from components needing cooling, and convert electric energy to heat energy to transfer to components needing heating.

Abstract: A method and system for raising the operating temperature of an emissions control device of an automotive vehicle. A generator converts the vehicle's mechanical braking energy to electrical energy. The electrical energy is delivered, without electrical storage, to an electric heater that heats either the emissions control device or the exhaust gas at the input to the device.

Abstract: A method for controlling an engine includes receiving a request to regenerate a particulate matter filter and regulating, in response to the request, operation of the engine and an electric heater that heats an inlet surface of the filter such that for a first period, the heater maintains the inlet surface within a first temperature range above a regeneration temperature of the filter and combustion of a first mass of accumulated PM within the filter is initiated, for a second period following the first period, exhaust cools the inlet surface to within a second temperature range below the regeneration temperature and combustion of the first mass is inhibited, and for a third period following the second period, the inlet surface is maintained within a third temperature range above the regeneration temperature and a second mass of the accumulated PM is combusted. A related control system is also provided.

Abstract: The present invention relates to a system for controlling the temperature of a fluid additive for an exhaust system of an internal combustion engine. The system has means for exchanging heat between the additive and a refrigerant circuit of a refrigerant system. The fluid additive is preferably a NOx-reducing additive, in particular a urea-water solution, for an SCR catalytic converter system of a motor vehicle. Here, a direct or indirect exchange of heat may be provided between the refrigerant circuit of the refrigerant system, specifically in particular of a vehicle air conditioning system, and the additive.

Abstract: An exhaust assembly includes an exhaust pipe, a first venturi member at the inlet end of the pipe and a second venturi member at the outlet end of the pipe. A diffuser/mixer is mounted at the outlet end of the exhaust pipe. A shield pipe surrounds a portion of the exhaust pipe. A shield member is mounted to the shield pipe and covers a portion of the first venturi member. The first and second venturi members operate to combine ambient air with exhaust gases.

Abstract: A method for recovering exhaust heat for an engine is disclosed herein. The method includes reducing a volume of a circulating heat transfer fluid and discharging a heat storage device to heat an engine component. The method further includes distributing the circulating heat transfer fluid to one or more engine systems.

Abstract: A first heat medium is circulated in a first circulating path (engine cooling circuit) of a heat source (engine) to cool the heat source down by the first heat medium, and exhaust heat from the heat source is absorbed by the first heat medium. A second heat medium is circulated in a second circulating path (exhaust heat recovering circuit) to exchange heat of exhaust air with the second heat medium, and heat of the first heat medium is exchanged with the second heat medium circulating in the second circulation path. The heat of the second medium to which heat is applied due to these heat exchanges is stored in heat storage means (heat storage tank).

Abstract: The present invention is related to an improved thermal insulation of an exhaust tube (6) for use in a rocket engine. The thermal insulation is provided for as a layered structure wherein respective layers comprises a composite material, and wherein dominant directions of fibres in respective adjacent layers are different with respect to each other. In addition, a flexible layer might be used to attach the thermal insulation to an inner wall of the exhaust tube (6).

Abstract: The present invention is directed to a process for the clean and convenient combustion of high viscosity liquid fuels, such as glycerol, as well as an apparatus useful for carrying such processes. In certain embodiments, the invention provides a process for glycerol combustion comprising providing a combustion apparatus with a glycerol combustion chamber that facilitates reflective heating, pre-heating the glycerol combustion chamber, atomizing the reduced viscosity glycerol, and combining the atomized glycerol with air in the glycerol combustion chamber to thereby completely combust the glycerol. In one embodiment, such as when using a pressure-atomizing nozzle, the inventive method may further comprise treating the glycerol to reduce the glycerol viscosity.

Abstract: A system for separating carbon dioxide gas from internal combustion engine exhaust and an electricity generating heat exchanger for the system. The system includes a scrubber tank containing a carbon dioxide absorbent fluid and configured to bubble exhaust gas from the heat exchanger through the carbon dioxide absorbent fluid, whereby carbon dioxide gas is absorbed by the carbon dioxide absorbent fluid. A carbon dioxide storage means stores the carbon dioxide released in a heat exchanger. The heat exchanger cools the exhaust gas emitted by the internal combustion engine, and includes a thermal electric generator (TEG) configured to couple thermally the exhaust gas chamber to the absorber fluid chamber in a manner effective to heat the CO2 absorbent fluid by heat from the engine exhaust to release CO2 gas from the CO2 absorbent fluid and generate electricity in response to a temperature difference therebetween.

Abstract: A heat recovery system for an engine is provided herein. According to one approach, the heat recovery system includes an upstream portion that circumferentially wraps around an outlet of an exhaust manifold. Further, the heat recovery system includes a downstream portion in direct surface contact with a top exterior surface and a bottom exterior surface of a plurality of runners of the exhaust manifold.

Abstract: An object is to provide a technology with which the temperature of exhaust gas can be raised with improved efficiency in cases where a catalyst apparatus including a catalyst having an oxidizing ability is provided in an exhaust passage of an internal combustion engine. According to the present invention, a catalyst apparatus 6 that is provided in the exhaust passage 1 of the internal combustion engine and to which reducing agent is supplied from upstream when the temperature of the exhaust gas is to be raised is equipped with at least first and second catalysts 4, 5 having an oxidizing ability. The first catalyst 4 is configured in such a way that the exhaust gas flows through a gap between its outer circumferential surface and the inner circumferential surface of the exhaust passage. The second catalyst 5 is disposed downstream of the first catalyst 4 with a space 10 having a specific width Ws between it and the first catalyst 4.

Abstract: A regeneration control system for use with a diesel engine having a diesel particulate filter is provided. This regeneration control system utilizes a wide band oxygen sensor placed in the exhaust stream upstream of a regeneration device, as well as an engine speed sensor, to determine when to initiate the regeneration event, and for controlling the regeneration device to ensure proper regeneration of the diesel particulate filter. The after treatment controller utilizes the oxygen percentage signal to calculate or otherwise determine the percentage load at which the diesel engine is operating. This information along with the engine speed information allows the after treatment controller to calculate or otherwise determine exhaust parameters necessary for proper control of the regeneration device.

Abstract: A method for selectively heating a reducing agent line of an SCR device during operation of an exhaust gas purification system of an internal combustion engine and a device for exhaust gas purification, include a supply tank for a reducing agent for SCR applications, a device for introducing the reducing agent into an exhaust line of an internal combustion engine and at least one reducing agent line for fluidically connecting the supply tank to the device.

Abstract: A muffler for a combustion engine includes walls forming a chamber, a first inlet, a first outlet, and a conduit. The first inlet is designed to receive exhaust gases from an exhaust duct of the engine. The exhaust gases pass through the chamber when moving from the first inlet to the first outlet. The exhaust gases then exit the muffler through the first outlet. The conduit extends between a second inlet and a second outlet. The second inlet is configured to receive fresh air entering the muffler. The fresh air then exits the conduit and is introduced into the exhaust gases through the second outlet.

Abstract: A machine includes an internal combustion engine disposed within an engine compartment and supported on a machine frame. An exhaust stack has an inlet fluidly connected to an exhaust manifold of the internal combustion engine and an outlet in fluid communication with ambient air. A diesel particulate filter is disposed along the exhaust stack, and the machine includes an active regeneration system for regenerating the diesel particulate filter. A cooling package including at least one heat exchanger and a blower fan. The blower fan is configured to blow cooling air from the engine compartment sequentially through the at least one heat exchanger and an outlet of the cooling package. Exhaust gas exiting the exhaust stack outlet is mixed with the cooling air exiting the cooling package outlet in a high temperature zone surrounding the exhaust stack outlet to form a fluid mixture.

Abstract: An engine exhaust gas purification device comprising control unit having successively arranged switching device (1), counter-current heat exchanger (3) and at least one exhaust gas purification component (2). The switching device (1) has a first position where a flow path (6) of the exhaust gas to the exhaust gas purification component (2) is opened and a second position where a flow path (6) of the exhaust gas to the exhaust gas purification component (2) is blocked and the exhaust gas flows along a further flow path (7) where the exhaust gas is heated and conveyed, via a flow path (20) of the exhaust gas purification component (2), and exits the exhaust gas purification unit (5) through outlet channels (4) of the counter-current heat exchanger (3). The switching device, the exhaust gas purification component, the counter-current heat exchanger and the flow paths are integrated in a compact exhaust gas treatment unit.

Abstract: A cylinder head with an integrated exhaust manifold is provided, the integrated exhaust manifold including an exhaust manifold flange. In one example, the cylinder head includes a cooled flange to control exhaust system heat. The cylinder head can improve operation of an integrated cylinder head during at least some operating conditions.

Abstract: A thermoelectric generator of a vehicle converts thermal energy of exhaust gas of an engine into electric energy by using a thermoelectric phenomenon, and may include: a high-temperature part heated by exchange heat and a plurality of pairs of heat transfer plates mounted on an outer peripheral surface of an exhaust pipe at a predetermined interval; pairs of thermoelectric modules acquired by bonding a P-type semiconductor and an N-type semiconductor, interposed between the pairs of heat transfer plates to generate electricity, and electrically connected to each other; and a low-temperature part interposed between the pairs of thermoelectric modules and cooling inner surfaces of the pairs of thermoelectric modules. The plurality of thermoelectric modules generates electricity by a difference in temperature between heated outer surfaces and cooled inner surfaces. Thermoelectric efficiency is improved and a small-sized thermoelectric generator of a vehicle may be implemented.

Abstract: In a land vehicle of the type having an engine and an exhaust system including an exhaust pipe, a flow diffuser for the exhaust pipe generally includes a substantially tubular body having an outer wall, an interior, and first and second ends, the first end being an exhaust inlet configured to be attachable to an exhaust pipe, the second end being an exhaust discharge portion having an exit plane, a plurality of radial struts extending inwardly from the inner surface of the outer wall to the center of the exit plane for dividing the exhaust discharge portion divided into a plurality of exit channels, and a plurality of air channels extending from the outer wall to the interior of the tubular body configured for delivering air to the interior of the tubular body.

Abstract: A thermoelectric generator may include a high temperature member having an exhaust pipe, and a ring-shaped first heat transfer plate equipped with a first flange installed on an external wall of the exhaust pipe and formed along a longitudinal direction of the exhaust pipe, a low temperature member having a first coolant pipe enclosing an external wall of the exhaust pipe, and a ring-shaped second heat transfer plate installed inside the first coolant pipe, and on which a second flange extends along a longitudinal direction of the first coolant pipe, and ring-shaped thermoelectric modules, which may be formed by joining a P-shaped semiconductor and an N-shaped semiconductor.

Abstract: A thermoelectric generator apparatus may include a high temperature member having an exhaust pipe, a ring-shaped first heat transfer plate surrounding the exhaust pipe, and a plurality of first heat exchange pins radially extending outwards from the first heat transfer plate in a predetermined degree, a low temperature member having an internal casing surrounding the exhaust pipe, an external casing surrounding the internal casing with a predetermined gap, a ring-shaped second heat transfer plate contacting with an internal wall of the internal casing, and a plurality of second heat exchange pins radially extending inwards from the second heat transfer plate in a predetermined angle, and a plurality of thermoelectric modules being in contact with the first heat exchange pins and the second heat exchange pins so as to generate electricity using a thermoelectric phenomenon caused by a temperature gap between the first heat exchange pins and the second heat exchange pins.

Abstract: A thermoelectric generator apparatus of a vehicle, may include a high temperature member installed on an external wall of the exhaust pipe inside a silencer of the vehicle and exchanging heat with the exhaust gas, a low temperature member installed on the external wall of the exhaust pipe and at a side of the high temperature member, and a thermoelectric module formed by joining a P-shaped semi-conductor and an N-shaped semi-conductor, wherein the thermoelectric module may be installed on the external wall of the exhaust pipe between the high temperature member and the low temperature member so that a side thereof may be heated by the high temperature member and the other side thereof may be cooled by the low temperature member in order to use a thermoelectric phenomenon caused by a temperature difference between the side and the other side of the thermoelectric module to generate electricity.

Abstract: A thermoelectric generator apparatus of a vehicle may include a high temperature member, through which exhaust gas passes, a low temperature member, which maintains a temperature lower than a temperature of the high temperature member, and which includes a first coolant pipe holder supporting one of coolant pipes, a heat transfer plate which extends from the first pipe holder and may be located opposite to a corresponding high-temperature member, and a second coolant pipe holder formed on the other side of the heat transfer plate and supporting another of the coolant pipes, and a thermoelectric module disposed between the high temperature member and the low temperature member.

Abstract: The present invention relates to an internal combustion engine and, more particularly, an internal combustion engine having a new and novel system for improving the efficiency of the engine. In a preferred embodiment the system comprises an expander effective for receiving condensed engine exhaust and placing said exhaust in contact with copper or a copper alloy and for transforming the exhaust into vapor for transfer into the combustion chamber of the engine. In a preferred embodiment the system further comprises a condenser means for cooling the exhaust exiting the engine sufficiently to condense any water vapor and/or fuel vapor to form a liquid mixture or water and fuel, collecting and storing the liquid mixture, and directing the stored liquid mixture to the expander.

Abstract: A heat exchange unit (214) arranged to be used to recover energy from exhaust gas, the heat exchange unit (214) comprising a gas inlet duct (222) to which a heat exchange duct (216) is connected, wherein a heat exchange array (752, 754) of a heat exchange system is situated within the heat exchange duct (216) surrounding a maintenance duct and wherein the maintenance duct (226) is arranged to allow access for inspection and/or maintenance of at least part of the heat exchange system.

Abstract: A Rankine cycle circuit is constituted by an expander, which forms a fluid machine, a condenser, a gear pump, which forms a fluid machine, and a boiler. A discharge passage is connected to a discharge chamber of a pump chamber. A branch passage is connected to the discharge passage, and a restriction passage is provided at the end of the branch passage. The restriction passage is open to an internal space K in a generator housing. An outflow passage extends through a partition wall of a center housing member and a side plate. The internal space K in which an alternator is located communicates with an outlet chamber through the outflow passage.

Abstract: [Problems] Provided is a configuration in which a member is not interposed between exhaust gas and a partition wall of an engine coolant passage, and the exhaust gas is caused to directly collide with the partition wall of the engine coolant passage, thus raising the gas flow velocity in a heat exchange part, which enables further improving the exhaust heat recovery rate. [Means for Solving Problems] An engine exhaust gas heat recovery device (1) recovers heat from engine exhaust gas by performing heat exchange between the engine exhaust gas and engine coolant. A plurality of spray holes (20) facing an inner cylinder tube (31) of a coolant passage (3) have been provided in an outer tube (22) of an exhaust gas inflow tube (2), and the exhaust gas is caused to directly collide with the inner cylinder tube (31) of the coolant passage (3). A minimum distance from each of the spray holes (20) to the inner cylinder tube (31) of the coolant passage (3) is in a range of 1.5 to 7 times the diameter of the spray holes.

Abstract: A method of controlling the temperature of a thermoelectric generator (TEG) in an exhaust system of an engine is provided. The method includes determining the temperature of the heated side of the TEG, determining exhaust gas flow rate through the TEG, and determining the exhaust gas temperature through the TEG. A rate of change in temperature of the heated side of the TEG is predicted based on the determined temperature, the determined exhaust gas flow rate, and the determined exhaust gas temperature through the TEG. Using the predicted rate of change of temperature of the heated side, exhaust gas flow rate through the TEG is calculated that will result in a maximum temperature of the heated side of the TEG less than a predetermined critical temperature given the predicted rate of change in temperature of the heated side of the TEG. A corresponding apparatus is provided.

Abstract: A valve assembly may include a valve body, a valve member, and a valve shaft. The valve body may include an inlet, an outlet, and first and second fluid paths in fluid communication with the inlet. The first fluid path may extend axially through at least a portion of the valve body. The second fluid path may be defined by first and second annular walls and may at least partially surround the first fluid path. The valve member is disposed in the valve body and may be movable between a first position preventing fluid flow through the first fluid path and a second position allowing fluid flow through the first fluid path. The valve shaft may be fixed to the valve member and mounted to the valve body for rotation relative to the valve body.