About 40 results
https://drivepatents.com/patents/941072 · 29 Jun 2016
Deterioration of a selective catalytic reduction (SCR) catalyst (5) can be diagnosed with sufficient accuracy, by making use of a sensor (7) for measuring an air fuel ratio of exhaust gas flowing into an exhaust gas purification apparatus, which is equippe...
https://drivepatents.com/patents/947887 · 9 Dec 2015
This control device for an internal combustion engine equipped with an exhaust purification catalyst (20), which is disposed in an exhaust passage of the internal combustion engine and capable of storing oxygen, includes: a downstream air-fuel ratio detect...
https://drivepatents.com/patents/958942 · 29 Jul 2015
In an exhaust path (4) of an internal combustion engine (2), a catalyst (6) including an oxygen storage capacity, a first air-fuel ratio sensor (10) installed upstream of the catalyst (6), and a second air-fuel ratio sensor (12) installed downward of the c...
https://drivepatents.com/patents/961826 · 8 Apr 2015
A catalyst deterioration determination system for determining deterioration of an exhaust gas purification catalyst having a capability of storing oxygen determines deterioration of the exhaust gas purification catalyst on the basis of its oxygen storage c...
https://drivepatents.com/patents/966968 · 26 Nov 2014
A method of estimating an ideal air-fuel ratio in an internal combustion engine, comprises receiving an output of an upstream air-fuel ratio sensor and an output of a downstream air-fuel ratio sensor, the upstream air-fuel ratio sensor being attached to an...
https://drivepatents.com/patents/970708 · 3 Sep 2014
An oxygen amount (an oxygen storage amount OSA) stored by metal cerium during a storage cycle is obtained basis on an output value of an A/F sensor 18 in a time period immediately before an exhaust air-fuel ratio (a downstream side A/F) detected by the A/F...
https://drivepatents.com/patents/973490 · 18 Jun 2014
An LNT control method for a vehicle may minimize the loss ratio of fuel efficiency while satisfying limits of NOx by changing a rich mode control plan in accordance with the purification rate of NOx in LNT which changes with the degree of deterioration of ...
https://drivepatents.com/patents/974684 · 21 May 2014
Provided is an exhaust purification system for an internal combustion engine. The exhaust purification system comprising: a NOpurifying catalyst arranged in an exhaust passage of the internal combustion engine, wherein the NOpurifying catalyst comprises a ...
https://drivepatents.com/patents/976480 · 9 Apr 2014
A heater control device of an oxygen concentration sensor is provided in which even in a case where an internal combustion engine is automatically stopped by idle stop control after cold start-up, it is possible to start energization of a heater at an appr...
https://drivepatents.com/patents/983218 · 16 Oct 2013
The method involves injecting a reducing agent into an exhaust line (2). A post-treatment system (5) is provided with a reduction catalyst (6). Performance of the post-treatment system is verified. Conditions of state of components of the post-treatment sy...