Method and apparatus for regulating and testing

Details Method and apparatus for regulating and testing Method and apparatus for regulating and testing

1992-08-31

1994-08-23

Cross, E. Rollins

Power plants

Internal combustion engine with treatment or handling of...

Methods

123691, 60276, 60277, 60285, F01N 320

Patent

active

053396278

ABSTRACT:
A method for regulating an Otto engine and for checking a catalyst connected downstream of the engine includes measuring at least a quantity of one component of an exhaust gas leaving an Otto engine before the exhaust gas enters a catalyst connected downstream of the engine, and measuring a quantity of at least two components of the exhaust gas after the exhaust gas leaves the catalyst. An apparatus for regulating the engine unit and checking the catalyst includes a lambda sensor disposed in the exhaust line between the engine unit and the catalyst. A first line is connected to the lambda sensor. A diagnosis and engine control unit is connected to the first line for receiving output signals of the lambda sensor. A sensor unit is downstream of the output of the catalyst. A second line delivers output signals of the sensor unit to the diagnosis and engine control unit. A third line delivers output signals of the diagnosis and engine control unit to the engine unit.

REFERENCES:
patent: 4079714 (1978-03-01), Saito
patent: 4622809 (1986-11-01), Abthoff et al.
patent: 4870938 (1989-10-01), Nakaniwa
patent: 5090199 (1992-02-01), Ikuta et al.
patent: 5133184 (1992-07-01), Geiger
patent: 5159810 (1992-11-01), Grutter et al.
patent: 5191762 (1993-03-01), Kuroda et al.

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