Internal combustion engine utilizing stratified charge combustion process
This patent describes an internal combustion engine having a main air inlet passage communicating at an end thereof through the face of an cylinder head with an alternately expandable and contractable variable volume space in an end of a cylinder closed by such head, there being within the cylinder head a precombustion chamber forming a section of such passage and interposed between the space and an upstream portion of the passage, the chamber having a principal axis extending between opposite ends thereof and of which ends one is an air inlet and having a valve seat through which the chamber is communicative with the upstream passage portion and of which ends the other is an open end through which the passage has two-way communication with the space and is disposed to discharge air from the chamber into the space axially of the cylinder, the combination of air deflecting means in the chamber and operable during expansion of the space to modulate the flow of intake air passing through the chamber into the space into the form of a stream composed of a core portion flowing axially of the cylinder into the space and of a tubular portion encircling the core portion and flowing helically thereabout, fuel delivery means operable during a fuel injection period commencing during expansion of the space and subsequent to entry of a leading portion of the air stream into the space to inject evaporative fuel into the passage and into a trailing portion of the air stream therein at a rate to mix and form therewith an air-fuel mixture lean in fuel richness than flows within and at least partially through the chamber en route to the space during the expansion thereof. The fuel delivery means being operable to increase the volume of the trailing air stream portion mixed with fuel by advancing the starting time of the fuel injection period to increase the length of such period measured in units of space expansion.
- Assignee:
- NOV; NOV-89-037137; EDB-89-032675
- Patent Number(s):
- US 4784098
- OSTI ID:
- 6761465
- Resource Relation:
- Patent File Date: Filed date 20 Jul 1987
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
STRATIFIED CHARGE ENGINES
DESIGN
COMBUSTION
COMBUSTION CHAMBERS
COMBUSTION CONTROL
CYLINDERS
FLOW REGULATORS
FUEL-AIR RATIO
CHEMICAL REACTIONS
CONTROL
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OXIDATION
THERMOCHEMICAL PROCESSES
330100* - Internal Combustion Engines