About 40 results
https://drivepatents.com/patents/988929 · 10 Jul 2013
The present invention is intended to provide a technique which accurately detects the deterioration of an exhaust gas purification catalyst which is applied to an internal combustion engine capable of using gas fuel and liquid fuel. In the present inventio...
https://drivepatents.com/patents/985131 · 17 Apr 2013
In an internal combustion engine, an upstream side air-fuel ratio sensor (23), hydrocarbon feed valve (15), exhaust purification catalyst (13), and the downstream side air-fuel ratio sensor (24) are arranged in an engine exhaust passage in that order from ...
https://drivepatents.com/patents/994802 · 26 Dec 2012
In an internal combustion engine including an EGR device with an EGR catalyst in some of exhaust systems, an oxygen occlusion capacity of a catalyst disposed in an exhaust collecting pipe of it is obtained with high precision, and based on the result, dete...
https://drivepatents.com/patents/995872 · 21 Nov 2012
The method involves verifying the functional capability of nitrogen oxide that is an oxidation catalyst (5). A defined amount of carbon monoxide is added as a reducing agent. Carbon monoxide is oxidized with the exhaust gas stream upstream of the nitrogen ...
https://drivepatents.com/patents/1002864 · 2 May 2012
In an exhaust gas purification system provided with two or more exhaust gas purification devices each having an oxygen occlusion ability arranged in series in an exhaust passage, a technique is provided in which the degradation of each of the exhaust gas p...
https://drivepatents.com/patents/1074525 · 31 Aug 2005
Dignostic process for determining the oxidation capacity of a catalyst treating the exhaust gases from a thermal engine by determining the proportion of oxygen in the exhaust gases downstream of the catalyst and thence determine the oxidation capacity of t...
https://drivepatents.com/patents/1076364 · 29 Jun 2005
The invention provides a deterioration diagnostic device for diagnosing a degradation condition of an exhaust gas purifier disposed in an exhaust passage in an engine based on a sensor value of an exhaust gas sensor that is disposed downstream of the purif...
https://drivepatents.com/patents/1080056 · 9 Feb 2005
When a reducing agent is supplied from a supply valve into an exhaust port, an air-fuel ratio detected by an air-fuel ratio sensor becomes lower than an air-fuel ratio generated by fuel injected from a fuel injection valve into a combustion chamber. An est...
https://drivepatents.com/patents/1080777 · 12 Jan 2005
Operating an internal combustion engine of a vehicle comprises carrying out nitrogen oxide regeneration as a first step and carrying out a second step after the regeneration is completed.
https://drivepatents.com/patents/1083925 · 15 Sep 2004
Method for determination of the oxygen storage capacity of catalysts (22, 24) in a multi-channel exhaust system with at least two exhaust pipes (14, 16) comprises applying different amplitudes and frequencies to each pipe to produce an specific average lam...