Internal combustion engine with spark ignition

Details Internal combustion engine with spark ignition Internal combustion engine with spark ignition

1996-05-02

1997-07-01

Nelli, Raymond A.

Internal-combustion engines

Combustion chamber means having fuel injection only

Having a particular relationship between injection and...

F02B 500

Patent

active

056427069

ABSTRACT:
A combustion chamber formed by a recess in the piston of an internal combustion engine is divided by restrictions into two or more partial chambers. The ratio between the minimum distance in the area of the restrictions and the maximum distance in concave areas of the wall of the combustion chamber, as measured from the axis of the combustion chamber, is between 0.2 and 0.5. In the area of the minimum distance downstream of the restriction, the wall of each partial chamber is inclined relative to the axis of the combustion chamber, the inclination decreasing continuously in downstream direction. To achieve extremely lean operation with low exhaust emissions, the fuel injection device is located in a position eccentric to the center of the combustion chamber, and the ignition device is located approximately in the center of the combustion chamber. The restrictions of the piston recess are provided with guide faces located approximately parallel to the axis of the combustion chamber and directed towards the center of the combustion chamber, the smallest distance of these guide faces from the center of the combustion chamber being 0-0.2 times the piston diameter.

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A. Scussel, "The Ford PROCO Engine Update" in SAE 780699, Aug. 7-10, 1978, pp. 1-39.
International Pub. No. WO 88/08082 to P. W. Ragg et al., entitled "Pressurizing a Gas Injection Type Fuel Injection System," dated Oct. 20, 1988.
M. G. Kingston et al., "Nebula Combustion System For Lean Burn Spark Ignited Gas Engines" in SAE 890211, Feb. 27--Mar. 3, 1989, pp. 1-12.

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