Indirect monitoring and control of visible exhaust emissions fro

Details Indirect monitoring and control of visible exhaust emissions fro Indirect monitoring and control of visible exhaust emissions fro

1997-07-28

1999-05-11

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Having condition responsive means with engine being part of...

123357, 123478, 290 17, 290 40C, F02D41/14

Patent

active

059016833

ABSTRACT:
A system and method are provided for limiting visible exhaust emissions from a diesel-electric traction vehicle system including a multi-cylinder diesel engine connected for driving a synchronous generator to produce AC electric power, a rectifier connected for converting the AC electric power to DC electric power on a DC link, at least one inverter coupled to the DC link for providing controlled frequency AC power to at least one electric traction motor coupled in driving relationship to at least one wheel of the vehicle. The air-fuel ratio at the engine is regulated to minimize any difference between actual air-fuel ratio and a predetermined preferential air-fuel ratio as a function of engine speed. The air-fuel ratio of an operating engine is measured while monitoring actual visible exhaust emissions in order to create a table of preferential air-fuel ratios as a function of engine speed so that the table values can be used to control visible exhaust without direct monitoring.

REFERENCES:
patent: 5150694 (1992-09-01), Currie et al.
patent: 5415139 (1995-05-01), Aoto et al.
patent: 5425338 (1995-06-01), Gottemoller
patent: 5826563 (1988-10-01), Patel et al.

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