About 43 results
https://drivepatents.com/patents/1099263 · 2 Jan 2003
In an exhaust gas purifying apparatus 1 provided with a nitrogen oxides absorption-reduction catalyst 2 for executing rich spike when the integrated value NOx mass of the NOx computed from the operating state of the engine E exceeds the predetermined first...
https://drivepatents.com/patents/1099786 · 11 Dec 2002
Sulphur oxides in the exhaust gas of a vehicle engine (1) are trapped by a nitrogen oxide trapping catalyst (5A). A controller (6) calculates the sulphur oxide poisoning amount of the trapping catalyst (5A) from the running condition of the vehicle (S13), ...
https://drivepatents.com/patents/1100260 · 20 Nov 2002
In a process to remove sulfur from an automotive NOx storage trap operated in lean burn mode, a calculation model determines the sulfur removal steps. The steps are modified using information derived from a knock signal and the fuel anti-knock sensitivity,...
https://drivepatents.com/patents/1101112 · 9 Oct 2002
Process for controlling an operating modulus of a lean burn IC engine (10) having an exhaust gas tract (14) with a NOx storage catalyst (20) and a gas sensor (24) comprises allowing a lean operating modulus of the engine with lambda more than 1 depending o...
https://drivepatents.com/patents/1101293 · 2 Oct 2002
In an exhaust gas purifying apparatus disposed in an exhaust passage of a diesel engine, an NOx trap catalyst is filled. The NOx trap catalyst uses an NOx absorber which absorbs NOx in an atmosphere with an excess oxygen while releasing the absorbed NOx wh...
https://drivepatents.com/patents/1101275 · 2 Oct 2002
In air-fuel ratio control apparatus and method for an internal combustion engine having an EGR valve interposed in an EGR passage between an intake manifold and an exhaust manifold, a target EGR quantity is calculated, a determination is made which of air-...
https://drivepatents.com/patents/1102324 · 21 Aug 2002
An engine control unit (50) performs homogeneous charge combustion with a rich air-fuel ratio when a NOx absorption material has absorbed a specified amount of NOx absorption so as to purge NOx and to reduce the NOx with HC and CO in an exhaust gas, thereb...
https://drivepatents.com/patents/1102793 · 31 Jul 2002
The method involves coordinating measurement values of a nitrogen oxides (NOx) sensor in an exhaust system with earlier signals values for the same NOx content. This involves setting a defined engine operating state, detecting at least one NOx sensor value...
https://drivepatents.com/patents/1103299 · 3 Jul 2002
A basic target excess air factor tLAMBDAO and a target fresh air intake amount tQac are set base upon the operation condition of an engine (30). A target excess air factor tLAMBDA is calculated by multiplying the ratio of a real fresh air intake amount rQa...
https://drivepatents.com/patents/1105473 · 3 Apr 2002
In the case that an engine is operated in a state where an in-cylinder air/fuel ratio is lean in a stratified combustion region (I) and a fuel cut control is performed under a predetermined condition, when catalysts 32, 34 are in a low temperature state wh...