About 104 results
https://drivepatents.com/patents/1106924 · 30 Jan 2002
Fuel supply system (10) of engine (1) includes a fuel supply pump (11), a common rail (12), fuel injector valves (13), and a cut-off valve (14), and a reducing-agent supplying device which includes a metering valve (16), a fuel introducing nozzle (17) and ...
https://drivepatents.com/patents/1106887 · 30 Jan 2002
A reducing-agent supplying apparatus (28) of the present invention for supplying a reducing-agent to an exhaust gas purifying catalyst (20), detects abnormality such as leakage of the reducing-agent and contributes to restraining of deterioration of exhaus...
https://drivepatents.com/patents/1108712 · 7 Nov 2001
Detecting the condition of NOx catalyst in an engine exhaust pipe includes supplying an engine with a lean air fuel mixture and recirculating some exhaust gas. The NOx output of the engine is increased to saturate the catalyst, the state of the catalyst is...
https://drivepatents.com/patents/1109199 · 17 Oct 2001
Testing functionality of nitrogen oxide storage catalyst containing nitrogen oxide storage material, catalyst and optionally oxygen storage material comprises determining nitrogen oxide storeability of catalyst to determine damage to it at exhaust gas temp...
https://drivepatents.com/patents/1109947 · 26 Sep 2001
Process for testing the functionality of a catalyst used for purifying IC engine exhaust gas during operation of the engine comprises equipping the engine with an electronic on-board diagnostics system; and determining the difference DELTA T of the actual ...
https://drivepatents.com/patents/1109901 · 26 Sep 2001
Process for monitoring the function of a three-way catalyst in the exhaust gas channel of an IC engine comprises determining the lambda region; acquiring the size of the NOx signal and/or the value of a gradient of the NOx signal in a prescribed measuring ...
https://drivepatents.com/patents/1110089 · 19 Sep 2001
An engine diagnostic system for use with an internal combustion engine (11) coupled to a lean NOx trap (72) with a sensor coupled downstream of the trap (72). The sensor provides two output signals, one indicative of an air-fuel ratio and the second indica...
https://drivepatents.com/patents/1110081 · 19 Sep 2001
A method and apparatus for controlling the operation of a "lean-burn" internal combustion engine (12) in co-operation with an emissions control device (36) capable of alternatively storing and releasing an exhaust gas constituent when exposed to exhaust ga...
https://drivepatents.com/patents/1110070 · 19 Sep 2001
An engine control system for managing lean NOx trap (72) decontamination uses associated fuel economy impacts to determine when decontamination is enabled. In particular, a maximum achievable benefit provided by lean operation with a decontaminated NOx tra...
https://drivepatents.com/patents/1110613 · 29 Aug 2001
A diagnosis system for an engine (100) including an exhaust pipe (10), a hydrocarbon (HC) absorbent (11) arranged within the exhaust pipe (10), an upstream air/fuel ratio sensor (12) arranged upstream of the HC absorbent (11) and detecting a wide range air...