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1. WO2022000013 - GAS-OPERATED INTERNAL COMBUSTION ENGINE AND EXHAUST GAS CLEANING THEREFOR

Publication Number WO/2022/000013
Publication Date 06.01.2022
International Application No. PCT/AT2021/060234
International Filing Date 02.07.2021
IPC
F02D 19/06 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
19Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
06peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
CPC
F01N 3/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
3Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
F02B 43/10
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
43Engines characterised by operating on gaseous fuels; Plants including such engines
10Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
F02D 19/024
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
19Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
02peculiar to engines working with gaseous fuels
021Control of components of the fuel supply system
023to adjust the fuel mass or volume flow
024by controlling fuel injectors
F02D 19/0644
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
19Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
06peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
0639characterised by the type of fuels
0642at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
0644the gaseous fuel being hydrogen, ammonia or carbon monoxide
F02D 2250/36
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
2250Engine control related to specific problems or objectives
36Control for minimising NOx emissions
F02D 41/0027
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
0025Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
0027the fuel being gaseous
Applicants
  • AVL LIST GMBH [AT]/[AT]
Inventors
  • HADL, Klaus
Priority Data
A50565/202003.07.2020AT
Publication Language German (de)
Filing Language German (DE)
Designated States
Title
(DE) GASBETRIEBENE BRENNKRAFTMASCHINE UND ABGASREINIGUNG HIERFÜR
(EN) GAS-OPERATED INTERNAL COMBUSTION ENGINE AND EXHAUST GAS CLEANING THEREFOR
(FR) MOTEUR À COMBUSTION INTERNE FONCTIONNANT AU GAZ ET NETTOYAGE DE GAZ D'ÉCHAPPEMENT ASSOCIÉ
Abstract
(DE) Die Erfindung betrifft eine gasbetriebene Brennkraftmaschine, bei deren Betrieb in Arbeitszyklen der Brennkraftmaschine jeweils wenigstens zwei Einspritzvorgänge vorgesehen sind, bei denen ein gasförmiger Kraftstoff in einen Brennraum der Brennkraftmaschine eingespritzt wird, wobei die wenigstens zwei Einspritzvorgänge eine drehmomenterzeugende Haupteinspritzung und eine zeitlich nach der Haupteinspritzung erfolgende zweite Einspritzung von Kraftstoff umfassen. Erfindungsgemäß ist als zweite Einspritzung eine Nacheinspritzung derart vorgesehen, dass nacheingespritzter Kraftstoff chemisch zumindest im Wesentlichen unverändert als Abgasbestandteil aus dem Brennraum in einen Abgastrakt der Brennkraftmaschine ausgestoßen wird und wenigstens teilweise mit im Abgas enthaltenem Stickoxid an einem im Abgastrakt angeordneten Katalysator unter Bildung von Stickstoff reagiert.
(EN) The invention relates to a gas-operated internal combustion engine, during the operation of which at least two injection processes are provided in each working cycle of the internal combustion engine, in which injection processes a gaseous fuel is injected into a combustion chamber of the internal combustion engine, wherein the at least two injection processes comprise a torque-producing main injection and a second injection of fuel, which second injection occurs after the main injection. According to the invention, a post-injection is provided as the second injection, such that post-injected fuel is discharged, at least substantially unchanged chemically, from the combustion chamber into an exhaust gas system of the internal combustion engine as an exhaust gas constituent and at least partially reacts with nitrogen oxide contained in the exhaust gas on a catalyst disposed in the exhaust gas system, such that nitrogen is formed.
(FR) La présente invention concerne un moteur à combustion interne fonctionnant au gaz, pendant le fonctionnement duquel deux processus d'injection ou plus sont prévus dans chaque cycle de travail du moteur à combustion interne, pendant lesquels processus d'injection un carburant gazeux est injecté dans une chambre de combustion du moteur à combustion interne, lesdits deux processus d'injection ou plus comprenant une injection principale produisant un couple et une seconde injection de carburant, ladite seconde injection se produisant après l'injection principale. Selon la présente invention, une post-injection est fournie en tant que seconde injection de sorte que le carburant post-injecté soit évacué, sans modification chimique notable, de la chambre de combustion vers un système de gaz d'échappement du moteur à combustion interne en tant que constituant de gaz d'échappement et réagisse au moins partiellement avec de l'oxyde d'azote contenu dans le gaz d'échappement sur un catalyseur disposé dans le système de gaz d'échappement de manière à former de l'azote.
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