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However, the described multi-hole and single-hole injection valves have the disadvantage that the holes are clogged or carbon-deposited under existing operating conditions due to soot deposits present in the exhaust gas
Since the supply of fuel to the injection valve does not take place at a constant pressure due to the components involved, but there are pressure fluctuations, possibly also short-term pressure peaks, a stoppage of the oscillating operation can occur
Method used
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[0027] as from figure 1 As can be seen in , a device 1 for regeneration, temperature loading and / or thermal management of components of an internal combustion engine associated with the exhaust system comprises an injection valve 10, a safety valve connected upstream of the injection valve 10 and a Metering valve 9, the injection valve injects fuel 4 into the exhaust pipe 3 of the exhaust system according to the pressure of the input fuel, the safety valve can interrupt the fuel input, the metering valve is arranged between the safety valve 8 and the injection valve 10 time and determine the fuel quantity for injector 10 . The component associated with the exhaust system can be, for example, a particulate filter, in particular a diesel particulate filter, or a NOx accumulator.
[0028] The safety valve 8 , the metering valve 9 and the injection valve 10 are each designed as spring-loaded valves, wherein the safety valve 8 and the metering valve 9 are arranged in a structural ...
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Abstract
The invention relates to a device for the regeneration, temperature loading and / or thermal management of a component, assigned to an exhaust system, of an internal combustion engine, comprising at least one injection valve (10, 100, 200) which injects a fluid, in particular fuel, into the exhaust system, preferably in chatter mode, for example as a function of the pressure of the supplied fluid, wherein the injection valve has a valve head (11, 110) and a valve seat (13, 130), wherein the geometries of the valve head (11, 110) and of the valve seat (13, 130) are designed in such a way that a fluidic force, acting on the injection valve (10, 100, 200), of the supplied fluid, drops continuously over a stroke (H) of the valve head (11, 110). The invention also relates to an injection valve having such valve-head and valve-seat geometries and to a corresponding method for the regeneration, temperature loading and / or thermal management of a component, assigned to an exhaust system, of an internal combustion engine.
Description
technical field [0001] The invention relates to a device for regeneration, temperature loading and / or thermal management of components of an internal combustion engine assigned to an exhaust system and an injection valve for use in such a device and to a device for regenerating components assigned to an exhaust system according to the independent claims. The method by which components of the system are regenerated, temperature loaded, and / or thermally managed. Background technique [0002] It is already known to install particulate filters in the exhaust system of internal combustion engines of vehicles. If the internal combustion engine is, for example, a diesel engine, the particle filter acts, for example, as a soot filter and reduces the fine dust load due to its filtering action. In order to avoid clogging of the filter after a certain period of use, it is necessary to regenerate the filter from time to time. The regeneration takes place by increasing the temperature,...
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