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Method for regenerating a particulate filter of a combustion engine and correspondingly equipped control means and vehicle

A particle filter and vehicle technology, applied in engine control, fuel injection control, internal combustion piston engine, etc., can solve problems such as shortened oil change intervals, engine damage, thin oil, etc., and achieve the effect of reducing noise troubles

Active Publication Date: 2015-08-05
VOLKSWAGEN AG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Over time this can lead to oil becoming very thin and therefore shorter oil change intervals, increased component wear and in worst case engine damage due to oil flooding

Method used

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  • Method for regenerating a particulate filter of a combustion engine and correspondingly equipped control means and vehicle
  • Method for regenerating a particulate filter of a combustion engine and correspondingly equipped control means and vehicle
  • Method for regenerating a particulate filter of a combustion engine and correspondingly equipped control means and vehicle

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Embodiment Construction

[0035] In order to increase the temperature of the exhaust gases, the injection is postponed overall to a later crank angle region relative to the normal operation of the internal combustion engine, e.g. figure 1 shown. Here, the two pre-injections or pilot injections Pil1 and Pil2 take place almost before top dead center (corresponding to a crank angle of 0°), and the main injection MI takes place in the crank angle range of 0° to −14°. Followed by two subsequent injections Pol1 and Pol2, it is used to increase the temperature in the engine and increase the temperature of the exhaust gas. It can be seen that the combustion curve 1 is delayed or prolonged by the post-injections Pol1 , Pol2 into the later crank angle range.

[0036] According to the invention, the second post-injection Pol2 is now divided into several post-injections Pol2a, Pol2b, as it is used for figure 2 implementation form. In other words, the fuel quantity injected according to the prior art only by me...

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Abstract

For regenerating a particle filter (3) of an internal combustion engine (2) of a vehicle (10), the following steps are performed: entering a preheating operation state of the internal combustion engine (2), wherein preheating is performed through exhaust of the internal combustion engine (2) in the preheating operation state, and furthermore in the preheating operation state, dividing the fuel which is backwards ejected in the engine to a certain time of backward ejections (Pol1,Pol2a,Pol2b), wherein the number of times is larger than the number of backward ejections in the engine in other operation states of the internal combustion engine (2). Furthermore other operation states are different from the preheating operation state.

Description

technical field [0001] The invention relates to a regeneration method for a particle filter of an internal combustion engine, in particular a diesel engine, as well as a correspondingly designed control unit and a correspondingly designed vehicle. Background technique [0002] Patent document DE 10 2005 054 387 A1 discloses the regeneration of a particle filter by performing an intermittent after-injection. [0003] Patent document DE 10 2004 033 414 A1 describes the determination of an index for the oil level of the engine oil of an internal combustion engine, wherein at least one post-injection of fuel is taken into account. [0004] Patent document WO 2009 / 112056 A1 discloses a regeneration method for an exhaust gas purification system in which a plurality of post-injections is carried out. [0005] For regeneration of the particulate filter, the exhaust gas temperature must lie above a predetermined temperature threshold (eg 350° C.). In order to increase the exhaust g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N9/00F02D41/40
CPCF02D41/029F02D41/064F02D41/0245F02D41/1446F02D41/405F02D2250/11F02D2200/701Y02T10/12Y02T10/40
Inventor C.海尔肯布林克尔A.萨罗
Owner VOLKSWAGEN AG
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