Anti-coking air injection apparatus for an internal combustion e

Details Anti-coking air injection apparatus for an internal combustion e Anti-coking air injection apparatus for an internal combustion e

1998-11-23

2000-07-11

Denion, Thomas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60293, 60275, 60307, 123549, 123556, F01N 310

Patent

active

060855193

ABSTRACT:
An improved anti-coking air injection reaction system in which individual air passages in the engine cylinder head are provided with electrical resistance heating elements that are periodically activated to develop radiant energy that bums off coke deposits formed on the passage side-walls. The heating elements are conveniently implemented with conventional glow plugs. A controller monitors engine operating parameters to identify conditions likely to result in the formation of coke deposits, and schedules activation of the heating elements in relation to the frequency of the identified conditions or the cumulative time of engine operation. The heating elements may be activated sequentially or in banks to reduce electrical loading, and the activation is preferably scheduled during non-critical operating conditions defined by specified ranges of coolant temperature and engine speed and/or load. Due to the cleansing action of the heating elements, the auxiliary air passages remain substantially deposit-free, resulting in the attainment of the intended emission reduction without requiring periodic engine servicing to clean out the air passages. Additionally, the air passages may be sized for ease of packaging and/or optimum air distribution, improving the efficiency and efficacy of the system.

REFERENCES:
patent: 3791144 (1974-02-01), Lang
patent: 4539812 (1985-09-01), Rezy
patent: 4558670 (1985-12-01), Trihey
patent: 4768481 (1988-09-01), Wood
patent: 5406788 (1995-04-01), Dambach et al.
patent: 5862786 (1999-01-01), Fuchs et al.

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