摘要:
An exhaust cleaning system for motor vehicles, especially a diesel exhaust cleaning system for medium to heavy utility vehicles. The exhaust cleaning system has an exhaust muffler (1), a catalytic converter (2) and an exhaust particle filter element (3). The exhaust muffler (1), the catalytic converter (2) with a U-shaped tubular urea injection element (4) arranged upstream and an exhaust particle filter element (3) are integrated in a common housing and designed as a structural, functional unit.
摘要:
The present application relates in general to methods for testing the performance of an automotive catalytic converter under conditions simulating those which occur in motor vehicles over extended driving conditions.
摘要:
A method of operating an internal combustion engine, including at least one cylinder and a piston slidable in the cylinder, may include supplying pressurized air from an intake manifold to an air intake port of a combustion chamber in the cylinder, selectively operating an air intake valve to open the air intake port to allow pressurized air to flow between the combustion chamber and the intake manifold substantially during a majority portion of a compression stroke of the piston, and operably controlling a fuel supply system to inject fuel into the combustion chamber after the intake valve is closed.
摘要:
The apparatus (1) for treating exhaust gas from an internal combustion engine includes a storing catalyzer for absorbing NOx during lean operating conditions and a device for burning fuel (3) in an exhaust gas stream (2) to produce a reducing atmosphere in the exhaust gas for storing catalyst regeneration and an aerodynamic control device for controlling the burning of the fuel in the exhaust gas stream, so that combustion is clearly improved when the engine is operated under lean operating conditions and no carbon is formed.
摘要:
The invention relates to an apparatus for collecting internal combustion engine exhaust emission particulates comprising at least one channel (1), preferably several parallel unobstructed flow channels, of about 3 mm to 30 mm diameter, and a length of about 10 cm to 100 cm, said channel being surrounded on all sides by spaces, recesses or pockets (2) of about 1 mm width which are about 5 mm deep in a direction perpendicular to the axis of the channel, said channels being such that the exhaust gases flow at a velocity of about 5 m/s to 50 m/s. The invention further relates to the associated process.
摘要:
A method is described of operating an internal combustion engine burning a fuel containing carbon and hydrogen, to provide a flame in the exhaust system to heat a catalytic converter or burn off the soot in a particulate filter trap. The method involves reducing the intake throttle opening during deceleration mode below the throttle opening for the steady speed idle position to create a proportion of combustible gases in the exhaust gas stream. By ensuring at the same time the presence in the exhaust gas stream of additional air, an ignitable mixture is produced which is ignited to burn as a flame in an afterburner chamber of the exhaust system. By selecting deceleration periods to enrich the mixture excessively in this manner, adverse effects on drivability go unnoticed.
摘要:
A soot filter for diesel engines having tubular filter cartridges through the wall of which the exhaust gas passes from without to within and the soot to be burnt off settles on the tube outer wall by a burner, at least some of the filter cartridges are provided with constrictions forming respective first and second areas inside the cartridges and providing the flow resistance through the first areas close to the burner greater than the one through the second areas formed further away from the burner.
摘要:
A particle filter for the exhaust gases of internal combustion engines is described, which can be regenerated by burning free, and in which the filter cartridges (12) include a support tube (16) with a lining of filter material (20). The support tubes 16 are conical. The lining with filter material (20) is preferably carried out such that the filter cartridge (12) has a cylindrical shape, i.e., the filter material (20) lining is thicker on the inlet side than on the outlet side. However, lining with an equal thickness of filter material (20) over the entire length of the conical part of the filter cartridge (12) is also shown.
摘要:
A method for regeneration of a particulate filter in which the attainment of a stable idling operating condition of the diesel engine is waited for, at least within a specifiable time period after the starting of the diesel engine, rotation-speed signals of the diesel engine being registered in the specifiable time period, before a control device registers and evaluates further operating values and outputs control commands to devices of the particulate-filter system in order to insure reliable burning off of soot particles deposited in the particulate filter and prevent damage to the particulate filter due to incorrect control actions.