In-cylinder control of particulates and nitric oxide for diesel

Details In-cylinder control of particulates and nitric oxide for diesel In-cylinder control of particulates and nitric oxide for diesel

1989-01-23

1989-11-28

Nelli, Raymond A.

Internal-combustion engines

Precombustion and main combustion chambers in series

Having combustible mixture forming means

F02B 300

Patent

active

048830321

ABSTRACT:
A method using concurrently and simultaneously certain control factors for in-cylinder combustion, at least two of such factors being at levels never tried before by the prior art. The combination of control factors comprises: (i) high pressure charging of supply air for enhanced excess oxygen; (ii) advanced techniques for improved in-cylinder mixing of fuel and air (i.e., high swirl, reentraining piston bowl configuration, high compression ratio); (iii) high pressure injection of diesel fuel at levels of 16-22.times.10.sup.3 psi; (iv) smaller fuel nozzle ports for creating finer droplet size; (v) retardation of fuel injection from TDC by 2.degree.-5.degree.; and (vi) limitation of the ingress of lubrication oil into the combustion chamber by use of noncompressed cylinder sleeves to enhance piston to bore concentricity and preferably by other augmenting limits.

REFERENCES:
patent: 4676210 (1987-01-01), Moser et al.
patent: 4771748 (1988-09-01), Chinnela et al.
patent: 4811708 (1989-03-01), Gruden
Cartellieri and Wachter, "Status Report On A Preliminary Survey Of Strategies To Meet U.S.-1991 HD Diesel Emissions Standards Without Exhaust Gas After-Treatment", SAE Technical Paper Series No. 870342, Feb. 1987.
Wade et al., "Reduction of NO.sub.x and Particulate Emissions In The Diesel Combustion Process", Journal of Engineering For Gas Turbines and Power, vol. 109, p. 426-433, Oct. 1987.

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