Internal combustion engine squish jet combustion chamber
AssigneeThe University of British Columbia
InventorRobert L. Evans
Life of this patent
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Abstract
A squish jet arrangement for an internal combustion engine is positioned on a piston member or cylinder head member thereof. A substantially cylindrical bowl opens onto the face of the member. At least one pair, and preferably a plurality of pairs, of squish jet passages are arranged to direct flows of gasses tangentially into the bowl. As first ones of the pairs of squish jet passages lie in a lower transverse plane than second ones of the pairs, a counter-rotating, bi-level swirl can be produced by the squish jet outlets. A squish jet arrangement is also provided with outlets of squish jet passages spaced above a lower surface of a bowl, and directed to eject coplanar flows of gasses therefrom, which intercept one another.
Claims32
An internal combustion engine block having a piston and cylinder head, one of which has:
- (a) a substantially cylindrical bowl opening into the face thereof;
- (b) a pair of squish jet passages having respective inlets communicating with the face thereof, and respective, transversely spaced, outlets directed substantially tangentially into the bowl, the outlet of a first one of the pair being directed upwardly, and the outlet of second one of the pair being directed downwardly from a position above the outlet of the first one, so that a counter-rotating, bi-level swirl can be produced in the bowl by the squish jet outlets.
A piston having:
- (a) A substantially cylindrical bowl opening into the face thereof:
- (b) a pair of squish jet passages having respective inlets communicating with the face thereof, and respective, transversely spaced, outlets directed substantially tangentially into the bowl, the outlet of a first one of the pair being directed upwardly, and the outlet of a second one of the pair being directed downwardly from a position above the outlet of the first one, so that a counter-rotating, bi-level swirl can be produced in the bowl by the squish jet outlets.
A piston having:
- (a) a substantially cylindrical bowl disposed centrally in the face of the piston;
- (b) a plurality of pairs of squish jet passages of equal length, and having respective inlets communicating with the face of the piston and equally spaced apart on a circle concentric with the opening of the bowl, the passages of each pair having respective, transversely opposed outlets directed substantially tangentially into the bowl, with the outlet of a first one of each pair being directed upwardly, and the outlet of a second one of each pair being directed downwardly, the outlets of the first and second ones of each pair being adjacent to, and directed substantially orthogonally to, outlets of the second and first ones, respectively, of other pairs of the squish jet passages, and the outlets of the first ones and second ones of the pairs being in respective lower and upper parallel transverse planes, so that a counter-rotating bi-level swirl can be produced in the bowl by the squish jet passages.
A cylinder head having:
- (a) a substantially cylindrical bowl opening into the face thereof;
- (b) a pair of squish jet passages having respective inlets communicating with the face thereof, and respective, transversely spaced, outlets directed substantially tangentially into the bowl, the outlet of a first one of the pair being directed upwardly, and the outlet of a second one of the pair being directed downwardly from a position above the outlet of the first one, so that a counter-rotating, bi-level swirl can be produced in the bowl by the squish jet outlets.
A cylinder head having:
- (a) a substantially cylindrical bowl disposed centrally in the face of the cylinder head:
- (b) a plurality of pairs of squish jet passages of equal length, and having respective inlets communicating with the face of the cylinder head and equally spaced apart on a circle concentric with the opening of the bowl, the passages of each pair having respective, transversely opposed outlets directed substantially tangentially into the bowl, with the outlet of a first one of each pair being directed upwardly, and the outlet of a second one of each pair being directed downwardly, the outlets of the first and second ones of each pair being adjacent to, and directed substantially orthogonally to, outlets of the second and first ones, respectively, of other pairs of the squish jet passages, and the outlets of the first ones and second ones of the pairs being in respective lower and upper parallel transverse planes, so that a counter-rotating bi-level swirl can be produced in the bowl by the squish jet passages.
A internal combustion engine block having a piston and cylinder head, one of which has:
- (a) a bowl opening onto the face thereof:
- (b) a plurality of squish jet passages having respective inlets disposed at spaced apart positions on the face thereof, and respective transversely spaced outlets above a lower surface of the bowl and directed into the bowl, so that flows of gasses ejected therefrom are substantially coplanar and intercept one another above the lower surface of the bowl
- the other one of the piston and cylinder head being shaped so that as the piston approaches top dead center, gasses are forced through the inlets of the squish jet passages, to be ejected from the outlets thereof.
A piston having:
- (a) a bowl opening onto the face thereof;
- (b) a plurality of squish jet passages having respective inlets disposed at spaced apart positions on the face thereof, and respective transversely spaced outlets spaced above a lower surface of the bowl and directed into the bowl, so that flows of gasses ejected therefrom are substantially coplanar and intercept one another above the lower surface of the bowl.
An internal combustion engine block as described in 14 wherein the outlets of the squish jet passages are symmetrically spaced apart and arranged so that the flows of gasses ejected therefrom are on the same radial plane.
A cylinder head having:
- (a) a bowl opening onto the face thereof;
- (b) a plurality of squish jet passages having respective inlets disposed at spaced apart positions on the face thereof, and respective transversely spaced outlets spaced above a lower surface of the bowl and directed into the bowl, so that flows of gasses ejected therefrom are substantially coplanar and intercept one another above the lower surface of the bowl.
Dependencies are inferred from the claim text.