About 31 results
https://drivepatents.com/patents/961108 · 6 May 2015
An exhaust gas purification catalyst is recovered from the sulfur poisoning more appropriately. For this purpose, an exhaust gas purification apparatus for an internal combustion engine selectively executes first control in which an air-fuel ratio of an ex...
https://drivepatents.com/patents/968539 · 22 Oct 2014
An exhaust gas purification system which feeds hydrocarbon (HC) by means of a post-injection under preset conditions to the upstream side of an exhaust gas purification device which is positioned on the exhaust path of an internal combustion engine, restor...
https://drivepatents.com/patents/968501 · 22 Oct 2014
An exhaust gas purification method of a diesel engine, which purifies exhaust gas while suppressing deteriorations in drivability and fuel consumption, when the exhaust gas G enters a rich reduction state, opens an EGR valve 15 and closes an intake throttl...
https://drivepatents.com/patents/973299 · 25 Jun 2014
An LNT (Lean NOx Trap) control method for vehicles increases a purification rate of NOx while preventing an increase in the amount of slip of separated NOx at a relatively low LNT temperature. The method includes a recycle necessity determining step that d...
https://drivepatents.com/patents/984587 · 28 Aug 2013
The deterioration judgment for an absorption reduction type NOx catalyst (1) is performed quickly and correctly. A catalyst deterioration judging system comprises a supply unit (5) which supplies a reducing agent, a measuring unit (8) which measures a NOx ...
https://drivepatents.com/patents/984510 · 28 Aug 2013
A DPF target temperature setting unit has a temperature increase rate setting portion which sets a temperature increase change rate such that, until a target set temperature at which PM is burnt is reached after the start of late post injection, the temper...
https://drivepatents.com/patents/987807 · 7 Aug 2013
An exhaust gas purification system includes a feedforward controller 47, a feedback controller 49 outputting a correcting variable for achieving a target temperature of DPF 7, and a variable adding unit 51 that adds the correcting variable output from the ...
https://drivepatents.com/patents/988364 · 24 Jul 2013
In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve (15) and an exhaust purification catalyst (13) are arranged. The concentration of hydrocarbons which flow into the exhaust purification catalyst (13) is made to...
https://drivepatents.com/patents/1016102 · 2 Feb 2011
In an internal combustion engine, an SO x trap catalyst (13) which traps SO x contained in the exhaust gas is arranged upstream of an NO x storing catalyst (15) in an engine exhaust passage. When the NO x storing catalyst (15) should release NO x , auxilia...
https://drivepatents.com/patents/1077860 · 11 May 2005
In an exhaust gas purifying system (1) for removing NOx by a NOx occlusion reduction type catalyst (11) for exhaust gas of an internal combustion engine, the air-fuel ratio in the exhaust gas is controlled by setting the target air-fuel ratio at a predeter...