摘要:
A method and a device are proposed for metering a reducing agent, in which means are provided for supplying the reducing agent into a catalytic converter system via a line, for the removal of nitrogen oxides from the exhaust gases, particularly of a Diesel engine, at the end of the line a metering means, especially a metering valve, being situated, and means being provided for regulating the pressure of the reducing agent in the line; the means for regulating the pressure (11, 12, 13; 11, 52, 70; 11, 13, 100) and/or the metering means (7; 120) being able to interact with a pressure recording element (12; 70; 100) which records pressure changes on the output side of the metering means facing away from the line, so that the pressure changes influence the pressure regulation and the metering.
摘要:
The invention relates to an apparatus for dividing an entering gas flow (1) into two split flows (20, 21), each of which flows through a branch (8, 9) of a line system. A control element (7) is provided, which executes a control motion (26) about a shaft (10) between a first position (27) and a second position (28). The entering gas flow (1) is divided continuously, by means of the adjustable control element (7), at a volumetric flow ratio VGas, and at the same time the control element (7) allocates a medium (5) to be metered, whose infeed point (3, 25) is associated with the control element (7), to the split flows (20, 21) at a different ratio VDOS.
摘要:
A value proportional to suction pressure is added to the difference between the maximum value and the minimum value of a pulsating exhaust pressure. When the sum exceeds a predetermined value, misfire of an engine is detected. The difference and the sum are formed electrically or pneumatically.
摘要:
A valve located in an engine intake manifold vacuum line is operated by differential vacuum forces to temporarily open an air bleed during engine deceleration high manifold vacuums to apply atmospheric pressure to a vacuum controlled unit that then bypasses air away from a catalytic converter and the engine to protect the converter and prevent backfire.
摘要:
An exhaust chamber for internal combustion engines of motor vehicles, in which the exhaust gases, before being discharged to the atmosphere, are passed through one of two coaxial chambers, with the inner chamber being filled with a suitable catalyst for the combustion of unburnt substances, depending on the load condition of the engine, so that the catalyst is contacted by these exhaust gases only at low working power.
摘要:
The invention relates to an exhaust gas line (1) of an internal combustion engine, comprising 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 comprises 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 means of 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 it is provided that 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.
摘要:
An exhaust valve assembly includes a valve body supported on a shaft for rotation within an exhaust component. The shaft is coupled to a solenoid with a linkage assembly. A controller controls the solenoid to rotate the shaft via the linkage assembly. The solenoid includes a plunger that moves between an actuation position and a release position. The controller utilizes pulse width modulation to control actuation and release of the plunger. This significantly reduces operational noises generated as the solenoid is moved between the actuation position and the release position.
摘要:
A turbine housing for an engine turbocharger includes a turbine outlet port fluidly coupled to an expansion mechanism, a waste port fluidly coupled to a collector, and a valve assembly rotatable between a first position blocking the turbine outlet port and a second position blocking the waste port. The valve assembly directs exhaust gas through the waste port in the first position and directs exhaust gas through the turbine outlet port in the second position. The valve assembly is in the first position during engine start-up to direct exhaust gas from the engine through the collector and into a catalyst. The valve assembly is in the second position a predetermined time following engine start-up to direct exhaust gas from the engine to the expansion mechanism.
摘要:
The invention relates to an apparatus for dividing an entering gas flow into two split flows, each of which flows through a branch of a line system. A control element is provided, which executes a control motion about a shaft between a first position and a second position. The entering gas flow is divided continuously, by means of the adjustable control element, at a volumetric flow ratio, and at the same time the control element allocates a medium to be metered, whose infeed point is associated with the control element, to the split flows at a different ratio VDOS.
摘要:
An exhaust system for an internal combustion engine which burns a hydrocarbon fuel mixture and which produces a carbonaceous particle carrying exhaust gas stream that passes through a filter of the system that retains at least part of the particles therein, the system having a burn-off unit for periodically burning the retained particles in the filter to tend to periodically clean the filter of the retained particles thereof. The burn-off unit is adapted to raise the temperature of the exhaust gas stream intermediate the engine and the filter to raise the temperature of the filter to particle burning temperature thereof, the burn-off unit injecting and burning a certain amount of the hydrocarbon fuel mixture in the exhaust gas stream intermediate the engine and the filter to raise the temperature of the exhaust gas stream intermediate the engine and the filter. The fuel mixture is injected into the exhaust gas stream by an aspirating unit of the burn-off unit, and the temperature of the exhaust gas stream is raised by an electrical heater and a catalyst bed in which the injected fuel mixture is to burn.