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Patent Searching and Data


Matches 651 - 700 out of 1,682

Document Document Title
WO/2001/094758
Combustion engine comprising an exhaust pipe, and a particle filter located in said exhaust pipe comprising a membrane which is permeable to gas components generated by a combustion process in the combustion engine but impermeable to soo...  
WO/2001/069052
A device for reforming an exhaust gas filter in a shorter time includes casings, in each of which are arranged a plurality of first temperature detectors (26a, 26b) for detecting the temperature in the casing and a plurality of second te...  
WO/2001/063110
A controller (6) computes the oxygen storage amount of the catalyst (3) separately as a high-speed component and a low speed component in accordance with actual characteristic. A target air-fuel ratio of an engine (1) is computed so that...  
WO/2001/055566
The invention relates to a method for detecting a NO¿x? storage capacity of a NO¿x? storage catalyst by means of a NO¿x?-sensitive measuring device which is arranged downstream in relation to the NO¿x? storage catalyst that is arrang...  
WO/2001/049995
An internal combustion engine (1), in particular, for a motor vehicle, is disclosed, comprising a catalyst (12), which may be charged with and discharged of nitrogen oxides. A NOx-Sensor (14) is provided with which the NOx emissions post...  
WO/2001/049987
The invention relates to an internal combustion engine (1), in particular, for a motor vehicle, in which, in a first operational mode, fuel can be directly injected into a combustion chamber (4) during an induction phase and, in a second...  
WO/2001/048358
The invention concerns a method for controlling a particulate filter (6) provided on an internal combustion engine exhaust line (1), which consists in triggering the actuation of means assisting the filter (6) regeneration in accordance ...  
WO/2001/044629
The invention relates to a method and a device for exhaust gas and catalyst temperature determination in an exhaust system of an internal combustion engine in a motor vehicle. Said exhaust system comprises an exhaust pipe, with at least ...  
WO/2001/033059
An internal combustion engine (1), in particular for a vehicle, is disclosed, which comprises a combustion chamber (4), into which fuel may be injected during a compression phase in one operating variant, or during an inlet phase in anot...  
WO/2001/033051
The invention relates to a method for the post-treatment of exhaust gases by subsequent injection of fuel in a diesel-type internal combustion engine that is provided with a pre-catalyst and a particle filter. According to this method, t...  
WO/2001/027447
The invention relates to a diagnostic method for an exhaust system of a combustion engine (1) for removing the residues of the particles emitted by the engine (1), said exhaust system comprising a particle filter (6) and controlled means...  
WO/2001/025601
A device for treatment of waste gases from an internal combustion engine whereby a reducing agent, in particular a urea or an aqueous urea solution, is brought into contact with said gas; comprising a mixing chamber (8) into which the re...  
WO/2001/021942
The invention concerns a method for monitoring the operating conditions of at least two catalytic converters of a heat engine operating in lean burn, characterised in that it consists in: assessing the efficacy of hydrocarbon treatment b...  
WO/2001/021951
The invention relates to a method for monitoring the functioning of an NO¿x? sensor (18) which is arranged in an exhaust gas channel of an internal combustion engine and which is located downstream from an NO¿x? storage catalytic conve...  
WO/2001/006098
In order to prevent the liquid reduction agent in an SCR method for an internal combustion engine (1) from freezing, additional electric heating resistances are applied to the pressure sensor diaphragm of the pressure sensor (18), presen...  
WO/2000/077355
The invention relates to a method for detecting deterioration of at least one NO¿x? storage catalyst arranged in the exhaust line of an internal combustion engine, whereby at least one exhaust gas constituent is detected by a gas sensor...  
WO/2000/071879
Means for influencing the exhaust gas of said internal combustion engine are provided. When certain conditions are present, a special operating mode in which the exhaust gas preferably has a higher energy content, is initiated. In said s...  
WO/2000/068557
The invention relates to a method and a device for controlling an internal combustion engine with an exhaust treatment system. A value (B) which characterizes the state of the exhaust treatment system is determined based on at least one ...  
WO/2000/060229
An NOx sensor (27) detects an NOx concentration released to the atmosphere from an occlusion type NOx catalyst (25); a total NOx exhaust amount (A) is calculated based on the output from the NOx sensor (27); when a total NOx emission amo...  
WO/2000/029729
The invention relates to a method for monitoring a NO¿x? storage catalytic converter (14) positioned downstream of an internal combustion engine (12) run on a lean mixture. According to said method the NO¿x? storage efficiency of the c...  
WO/2000/028200
According to the inventive method, an internal combustion engine is operated in the stratified charge operation and a base value for the NOx crude emission is determined which depends on the amount of fuel (MFF) injected into the cylinde...  
WO/2000/028196
An apparatus and method to treat fluid streams, and in particular emissions from lean-burn engines such as diesel engines, are disclosed, which use multiple catalysts chosen to remove hydrocarbons, carbon monoxide, particulate matter, an...  
WO/2000/021881
A safe, reliable SCR system for reducing NO¿x? emissions from a lean-burn internal combustion engine utilizes urea in aqueous solution. A modular assembly is provided for mounting inside an urea reagent tank (30) which enables controlle...  
WO/2000/017499
A problem encountered in computer-controlled diesel catalytic converters is the slowing down of reactant activity. The invention thus provides for the dosage (S10) of the reactant (10) to be coupled (S2, S8) by means of a functional rela...  
WO/2000/009870
The invention relates to a method according to which the temperature of the catalytic converter monolith is determined at the catalytic converter intake by means of a temperature model on the basis of modelled or measured exhaust-gas tem...  
WO/2000/008313
A combustor (10) for enhancing the combustion of entrained fuel or oil in the exhaust stream of an internal combustion engine is provided. The combustor (10) includes a housing (20) and an expansion chamber (60) inserted into the exhaust...  
WO/2000/008311
The invention relates to a method for desulfurising a catalyst system such as a NO¿x? accumulating catalyst (12) and/or a particle absorbing catalyst (16), which is mounted downstream from an internal combustion engine (10) operated wit...  
WO/1999/061770
In order to check the efficiency of an NOx accumulation catalyst (3) mounted in the exhaust system of an internal combustion engine (1) operated with a lean mixture, the actual accumulation capacity of the NOx accumulation catalyst (3) i...  
WO/1999/060255
An exhaust system or an engine (12) includes a lean NOx catalytic device (18), and a heat exchanger (70) positioned upstream of the catalytic device (18). Control means (44, 46) controls a valve (36) to regulate exhaust gas flow through ...  
WO/1999/051862
An exhaust emission particulate remover which is connected to a combustion emission gas exhausting path to remove particulate contained in the emission gas, comprising filter units (13 and 14), a fuel injection nozzle (31), and an ignito...  
WO/1999/049190
The invention relates to a method for control of a combustion engine (1) having means (4, 5, 17) for generation of an air/fuel mixture to each cylinder (3) of the engine (1), an exhaust system (7, 8) which is connected to the engine (1),...  
WO/1999/047795
Method and device to monitor functioning of a catalyst (15) mounted in the exhaust gas section (3) of an internal combustion engine (1), enabling determination of the conversion rate as a function of the temperature of the catalyst (15) ...  
WO/1999/039809
A system for NOx reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of NO to NO¿2?, a particulate filter, a source of reductant such as NH¿3?, and an SCR cata...  
WO/1999/035379
Method of monitoring the temperature of an exhaust system having a cooling loop, for internal combustion engines, wherein a catalytic converter and a nitrogen oxide trap are fitted in the exhaust system and the cooling surface is control...  
WO/1999/011909
A method and system for reducing concentration within an internal combustion engine (12) exhaust system (43) is disclosed. Soot and products of incomplete combustion in the engine exhaust gas stream (3) are destroyed by oxidizing them in...  
WO/1998/045586
A process, arrangement and device are disclosed for monitoring a regenerating NOx accumulator (2) in an exhaust line, in particular of a diesel or lean mixture engine, through which flows a NOx-containing gas. The temperature in the exha...  
WO/1998/043732
A safe, reliable SCR system for reducing NO�x? emissions from a lean-burn internal combustion engine utilizes urea in aqueous solution. Overheating and hydrolysis of the solution are prevented by maintaining the temperature of the urea...  
WO/1998/035143
In order to eliminate by catalyse a toxic substance in the exhaust gas (13) from a combustion system (10) by adding to that substance a dosed fluid (30), it is provided that a reference value be set for the mass flow rate (50) of the tox...  
WO/1998/027322
A method is disclosed for de-sulphurating a NOx trap in an engine and exhaust system which comprises heating the NOx trap (20) in a reducing atmosphere to a temperature at which sulphur is eliminated from the NOx trap by causing an exoth...  
WO/1998/013589
Disclosed is a secondary-air system for an internal combustion engine, comprising a secondary-air line which is connected through an inlet (9a) to an intake line (1) and through an outlet to an exhaust line (8). The inlet (9a) is located...  
WO/1998/005005
A process is disclosed for determining and/or paying a compensation for pollutants in the exhaust fumes of a combustion unit (1). The pollutants in the exhaust fumes are determined by at least one sensor (4) and an amount of monetary uni...  
WO/1997/017532
An exhaust manifold (7) of an engine (1) is connected to a three way (TW) catalyst (8a), and the TW catalyst (8a) is connected to an NH3 adsorbing and oxidizing (NH3-AO) catalyst (10a). The engine (1) performs the lean and the rich engin...  
WO/1997/016632
To accomplish an optimum regeneration operation of an exhaust emission control apparatus (124), the quantity of nitrogen oxide (C) absorbed in catalysts (125, 812) and an exhaust gas temperature (T) are predicted on the basis of future d...  
WO/1997/015750
In the warming-up phase, the fuel-oxygen ratio of exhaust gas upstream of a catalytic converter is regulated depending on the temperature of the catalytic converter. The amount of fuel is measured on the basis of the injection time. The ...  
WO/1997/015468
A method and device are proposed for detecting and documenting damage to catalytic converters caused by critical fuel levels in the fuel tank (10) of an internal combustion engine vehicle (12), the critical fuel levels in question being ...  
WO/1997/013964
The description relates to a process and a device for monitoring the operation of a catalyst, especially an oxidation and/or reduction catalyst, in a spontaneous-ignition internal combustion engine. There is a sensor (135) which generate...  
WO/1997/013055
The invention pertains to a process and associated device for metering the introduction of a quantity of reducing agent (4) into the exhaust gas or outlet air flow of a combustion unit, in particular an internal combustion engine (1) in ...  
WO/1997/012129
A process and device are disclosed for reacting a pollutant in an exhaust gas on a catalyst (2) with a reagent. The reagent is at first dosed depending on operation parameters of the exhaust gas and the temperature of the catalyst (2), i...  
WO/1996/027734
In order to reduce the exhaust gas emissions from internal combustion engines, in particular motor vehicle engines, with exhaust gas catalytic converters, the exhaust gases are guided between the engine (10) and catalytic converter (14),...  
WO/1996/027733
In the method proposed, air is fed by means of a secondary air fan (21) to the exhaust system (12) through a single air-supply line both when a fuel-fired burner (24) designed to heat the catalytic converter (14) is in operation and also...  

Matches 651 - 700 out of 1,682