摘要:
A plurality of parallel slanted fins like a louver are formed at a bottom wall of a heat insulating panel located under a catalytic converters with an exhaust pipe for attachment to an engine exhaust system.
摘要:
An apparatus for afterburning the combustible pollutants from the exhaust gases of an internal combustion engine in a reactor, in which secondary air is introduced. Upstream of the reactor, a chamber in the form of a torus is provided, through which the exhaust gases from a maximum number of cylinders flow before entering the reactor. A first obstacle, acting as a flame holder is disposed inside the torus. The reactor comprises a chamber whose inner surface is approximately a surface of revolution, and mounted inside of which is a second obstacle, acting as flame holder, substantially along the axis of revolution. The second flame holder has a diameter large enough to provide a contact time of 1 to 3 .times. 10.sup.-.sup.3 seconds of the gas flow in a recirculation zone surrounding the second flame holder, the diameter of the second flame holder being 15 to 40% of the reactor diameter.
摘要:
An elongate outer hollow member encloses an elongate inner hollow member to form an annular passage therebetween which communicates with an exhaust gas inlet of the outer hollow member. The inner hollow member has a combustion chamber defined therein, a plurality of ports formed through a closed upstream end portion and opening from the exhaust gas inlet into the combustion chamber for injection of a portion of exhaust gas thereinto and a plurality of ports formed through a side portion and opening from the annular passage into the combustion chamber for injection of the remaining portion of exhaust gas thereinto. An secondary air injection means is disposed in the combustion chamber adjacent to the closed end portion and upstream of the ports in the side portion for injection of secondary air into the combustion chamber.
摘要:
An exhaust gas cleaning device purifier for use in an internal combustion engine of a multicylinder type, comprising a housing to be disposed between exhaust ports of a cylinder head and an exhaust pipe in which housing a catalyst container is enclosed, the catalyst container consisting of two cylinders between which catalyst is filled, a control valve being provided on the catalyst container for passing a part of exhaust gas through the catalyst, thereby a part of the exhaust gas is passed or not through the catalyst in accordance with the conditions of the engine.
摘要:
In an exhaust gas cleaning device of the type having a reaction chamber provided intermediate of the exhaust pipe of an internal combustion engine, secondary air supply means comprising a portion of the exhaust pipe upstream of the reaction chamber which is constructed into a double wall structure having an inner wall defining an exhaust gas passage and an outer wall defining an outer chamber around said inner wall for the passage of secondary air valve means for opening and closing a secondary air supply hole formed in the inner wall and an air releasing hole formed in the outer wall for releasing the secondary air into the atmosphere, a temperature detector disposed within the reaction chamber and means for operating said valve means in response to a signal from said temperature detector, whereby when the internal temperature of the reaction chamber is lower than a predetermined level, the secondary air heated during passage through said outer chamber is supplied into the exhaust gas passage from said secondary air supply hole, while when the internal temperature of the reaction chamber becomes higher than the predetermined level, the secondary air cools the exhaust gases through the inner wall and is released into the atmosphere through said air releasing hole.
摘要:
An insulated heat pipe is provided which transfers heat from the engine's exhaust manifold to an exhaust gas reactor. The heat pipe contains a first zone serving as an evaporation zone, a second zone serving as a transport zone for transporting a working medium between the first zone and a third zone. The third zone serves as a condensation zone. The heat pipe has an interior capillary tube along which the condensed heat transfer medium flows toward the heat source and within which the vaporized medium flows toward the heat sink.
摘要:
A device for the treatment of exhaust gases from an internal combustion engine in which the exhaust gas is passed through a first bed of catalytic material which reduces nitrous oxides and is then supplied to a main flow channel which takes the form of a thermal reactor and which is surrounded by a bed of catalytic material in which carbon monoxide and hydrocarbon are oxidized. A control valve in the main flow channel is adjustable to control the share of the gas leaving the first bed of catalytic material which passes through the second bed of catalytic material. Additional air is supplied to the stream of exhaust gases, especially in the region immediately downstream of the first bed of catalytic material.
摘要:
A method of and a system for cleaning exhaust gases from engines of motor vehicles, wherein the exhaust gases are passed through reducing and oxidizing catalysts so that nitrogen oxides are reducing in the reducing catalyst and carbon monoxide and hydrocarbons are oxidized in the oxidizing catalyst. The engines are so arranged as to be operable on a relatively thin mixture which is preferably proportioned to provide an excess-air ratio of about 1.0 to 1.15 so that substantially no carbon monoxide and hydrogen are present in the exhaust gases emitted from the engine. A reducing agent such as hydrocarbons is admixed to the exhaust gases entering the reducing catalyst for removing an excess of oxides and reducing the nitrogen oxides in the exhaust gases while secondary air is supplied to the exhaust gases entering the oxidizing catalyst for assisting in the oxidization of the carbon monoxide and hydrocarbons remaining in the exhaust gases passed through the oxidizing catalyst.
摘要:
Apparatus for purification of waste gases from internal combustion engines, especially diesel engines, comprising a first housing provided with at least one gas inlet and a separating sump, a second housing connected therewith for gas flow and having at least one gas outlet, a gas buffering first casement loaded with packing traversing the flow cross-section of the first housing, a second casement occupying the flow cross-section of the second housing providing at least one flow channel for receiving a catalyst, the wall of the second casement in a given case being longitudinally tapered or the casement being of diverging-converging cross-section as well as a vibration damping and heat damping insulation enclosing said wall and connected therewith, and arranged at the juncture between the first and second housings, annulum or frame shaped flat springs fixed to the periphery of a casement as suspension and lying thereagainst.