Combustion Chamber Promoting Tumble Flow
AssigneeEcoMotors International
InventorPeter Hofbauer
Life of this patent
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Abstract
A combustion chamber in an opposed-piston, internal-combustion engine is disclosed in which the pistons tops are designed so that when they approach each other, they induce a tumble flow in one or two hemispherical spaces defined in the piston tops. The combustion chamber further includes injectors side mounted in the cylinder wall. In one embodiment, the tumble flows in the two hemispheres are in the same direction and in another embodiment, in opposite directions. In yet another embodiment, there is only one injector and one hemisphere in which a tumble flow is induced.
Claims20
An internal combustion engine, comprising:
- a cylinder wall;
- an intake piston disposed within the cylinder wall;
- an exhaust piston disposed within the cylinder wall;
- and
- a first fuel injector disposed in an opening that pierces the cylinder wall wherein:
- the pistons are adapted to reciprocate within the cylinder walls;
- when tops of the pistons are at their closest approach, a volume between the pistons forms a combustion chamber with first and second regions:
- the first region being substantially a cone proximate the injector with a tip of the cone closer to the first injector and a base of the cone away from the first injector and the second region being substantially a hemisphere with a flat surface of the hemisphere substantially coincident with a base of the cone.
A combustion chamber for an internal combustion engine, comprising:
- a cylinder wall;
- an intake piston disposed within the cylinder wall;
- an exhaust piston disposed within the cylinder wall;
- and
- first and second fuel injectors disposed in first and second openings that pierce the cylinder wall with the first and second injectors substantially opposed to each other wherein:
- the pistons are adapted to reciprocate within the cylinder walls;
- and
- when tops of the pistons are at their closest approach, the combustion chamber which is a volume located between the tops of the piston and comprises:
- a first cone with a tip of the cone substantially coincident with a tip of the first injector and a base of the cone located away from the first injector;
- a second cone with a tip of the second cone coincident with a tip of the second injector and a base of the cone located away from the second injector;
- a first hemisphere with a base of the first hemisphere coincident with a base of the first cone;
- and a second hemisphere with a base of the second hemisphere coincident with a base of the second cone.
Dependencies are inferred from the claim text.