Measuring and testing – Test stand – For engine
Patent
1995-04-06
1997-04-15
Chilcot, Richard
Measuring and testing
Test stand
For engine
2503385, 25033913, 250343, G01M 1500
Patent
active
056211660
ABSTRACT:
Apparatus and method are provided for testing of exhaust gas emissions from an internal combustion engine, and determining the engine's operating condition. An inferred value for the ratio of hydrogen to carbon in the exhaust, based on measured values for the H.sub.2 O, CO.sub.2 and CO components of the exhaust gas, is used to determine whether the engine and associated exhaust componentry have reached normal operating conditions. The emissions testing apparatus and method are suitable for remote testing of exhaust gas emissions from an internal combustion engine of an on-road motor vehicle. A light source emits preferably near to mid-infrared light to impinge upon the exhaust gas emissions. The emitted light includes wavelengths absorbed by exhaust species to be measured, including at least H.sub.2 O, CO.sub.2 and CO. Following impingement on the exhaust gas emissions, the light is received by a sensor which generates an output signal corresponding to the amount of light received at each of such wavelengths. A signal processor determines a value corresponding to the amount or relative amount of each measured specie in the exhaust gas, based at least in part on the corresponding output signals from the sensor. The processor also determines the engine's operating condition based at least in part on the output signals corresponding to H.sub.2 O, CO.sub.2 and CO. In particular, the processor determines whether the engine is in normal operating condition, rather than in cold-start or warm-up condition.
REFERENCES:
patent: 3406562 (1968-10-01), Perna, Jr. et al.
patent: 3630072 (1971-12-01), Traver
patent: 3973848 (1976-08-01), Jowett et al.
patent: 4160373 (1979-07-01), Fastaia et al.
patent: 4590374 (1986-05-01), Brewster
patent: 4687934 (1987-08-01), Passaro et al.
patent: 4924095 (1990-05-01), Swanson, Jr.
patent: 4950900 (1990-08-01), Takeuchi et al.
patent: 5138163 (1992-08-01), Butler et al.
patent: 5210702 (1993-05-01), Bishop et al.
patent: 5245406 (1993-09-01), Masutani
patent: 5251008 (1993-10-01), Masutani
patent: 5268745 (1993-12-01), Goody
patent: 5319199 (1994-06-01), Stedman et al.
patent: 5343043 (1994-08-01), Johnson
patent: 5401967 (1995-03-01), Stedman et al.
patent: 5416325 (1995-05-01), Buontempo et al.
patent: 5418366 (1995-05-01), Rubin et al.
Chilcot Richard
Ford Motor Company
May Roger L.
McCall Eric S.
Melotik Lorraine S.
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