Method For The Regeneration Of A Particle Filter Installed In The Exhaust Gas Train Of A Vehicular Diesel Engine

Inactive Publication Date: 2009-08-06
MAN NUTZFAHRZEUGE OESTERR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0005]It is therefore an object of the invention to improve the regeneration method of the general type in question so that it can be implemented more simply in terms of

Problems solved by technology

Especially in the case of vehicles like route buses and delivery trucks, which are operating under non-steady-state conditions most of the time, this known method of initiating the regeneration of s

Method used

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  • Method For The Regeneration Of A Particle Filter Installed In The Exhaust Gas Train Of A Vehicular Diesel Engine
  • Method For The Regeneration Of A Particle Filter Installed In The Exhaust Gas Train Of A Vehicular Diesel Engine
  • Method For The Regeneration Of A Particle Filter Installed In The Exhaust Gas Train Of A Vehicular Diesel Engine

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Embodiment Construction

[0016]In the following, the inventive method is explained in greater detail on the basis of the diagram of FIG. 1 and a schematic diagram of a diesel engine according to FIG. 3.

[0017]FIG. 3 shows a schematic diagram of a diesel engine 1 installed in a vehicle such as a truck, bus, or other utility vehicle. Each of six cylinders 2 has two outlet valves, each of which communicates with an exhaust gas-collecting manifold 4 by way of an outlet channel 3. In the case shown here, the cylinders 2 are divided into two banks of three each, and each bank is connected to one manifold 4. Both manifolds 4 lead to the turbine 5 of an exhaust gas turbocharger 6 and are components of the exhaust gas train of the diesel engine 1, which, on the outlet side of the turbine 5, is connected to a section 7, in which a particle filter 8 is installed. In the example shown here, an oxidation catalyst 9 is installed upstream of the particle filter 8. This catalyst is responsible for producing a significant in...

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Abstract

A method for regenerating a soot-laden particle filter in the exhaust gas train of a diesel engine in a vehicle, wherein the engine is equipped with a fuel injection system having an injection valve for each cylinder and an exhaust braking device including a butterfly valve in the exhaust gas train upstream of the particle filter. An exhaust braking phase is initiated by closing the butterfly valve, thereby causing hot exhaust gas to be compressed upstream of the butterfly valve. Regeneration of the particle filter is then initiated by injecting diesel fuel into the cylinders substantially after the respective pistons pass top dead center, and allowing the hot exhaust gas mixture containing unburned fuel and air to flow past the butterfly valve so that the mixture ignites the soot and then supports combustion of the soot, thereby regenerating the particle filter.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The invention relates to a method for the regeneration of a particle filter installed in the exhaust gas train of a vehicular diesel engine and partially loaded with separated soot particles, where the diesel engine is equipped with an exhaust brake device, to which a butterfly valve in the exhaust gas train upstream of the regeneration site belongs, and with a fuel injection system with an injection valve for each cylinder.[0003]2. Description of the Related Art[0004]In utility vehicles with diesel engines, particle filters are provided in the exhaust gas trains to satisfy the legally imposed exhaust gas regulations. Oxidation catalysts are installed upstream of the particle filters to increase the concentration of NOx in the exhaust gas, and in some cases SCR catalysts can be installed downstream. These particle filters are loaded to a greater or lesser extent with the soot separated from the exhaust gas. At sufficien...

Claims

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Application Information

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IPC IPC(8): F01N9/00F01N3/023
CPCF01N3/023F01N3/0235F02D9/06F02D41/025F02D41/029Y02T10/26F02D41/1448F02D41/40F02D41/405F02D2200/0802Y02T10/44F02D41/12Y02T10/12Y02T10/40
Inventor RICHTER, KLAUSRAAB, GOTTFRIED
Owner MAN NUTZFAHRZEUGE OESTERR
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