Homogeneous charge compression ignition internal combustion engine
First Claim
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1. A HCCI engine, comprising:
- a cylinder block having a cylinder formed therein;
a cylinder head mounted upon the cylinder block for closing the cylinder;
a power piston slidably contained within the cylinder;
a combustion chamber defined by said cylinder head, said cylinder, and said power piston;
a crankshaft, with said power piston being attached to said crankshaft by a connecting rod;
a fuel system for introducing fuel into the combustion chamber;
a boost piston for initiating timed combustion of fuel within the combustion chamber, with said boost piston being housed within a wall of said combustion chamber such that when the boost piston moves from a base position to an extended position the effective compression ratio of the cylinder increases, said boost piston being further selectively adjustable, effective to alter the extent to which said boost piston extends into said combustion chamber; and
a driver for moving the boost piston from a base position to an extended position during successive cycles of the engine, so as to cause fuel within the combustion chamber to ignite in response to movement of the boost piston to the extended position.
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Abstract
A HCCI engine includes a cylinder block with a cylinder head closing off a cylinder, a power piston slidably contained within the cylinder, and a boost piston for initiating timed combustion of fuel within a combustion chamber. The boost piston is housed within a wall of the combustion chamber such that when the boost piston moves from a base position to an extended position, the heat increase within the combustion chamber is sufficient to cause fuel within the combustion chamber to ignite.
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Citations
16 Claims
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1. A HCCI engine, comprising:
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a cylinder block having a cylinder formed therein;
a cylinder head mounted upon the cylinder block for closing the cylinder;
a power piston slidably contained within the cylinder;
a combustion chamber defined by said cylinder head, said cylinder, and said power piston;
a crankshaft, with said power piston being attached to said crankshaft by a connecting rod;
a fuel system for introducing fuel into the combustion chamber;
a boost piston for initiating timed combustion of fuel within the combustion chamber, with said boost piston being housed within a wall of said combustion chamber such that when the boost piston moves from a base position to an extended position the effective compression ratio of the cylinder increases, said boost piston being further selectively adjustable, effective to alter the extent to which said boost piston extends into said combustion chamber; and
a driver for moving the boost piston from a base position to an extended position during successive cycles of the engine, so as to cause fuel within the combustion chamber to ignite in response to movement of the boost piston to the extended position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A HCCI engine, comprising:
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a cylinder block having a cylinder formed therein;
a cylinder head mounted upon the cylinder block for closing the cylinder;
a power piston slidably contained within the cylinder;
a combustion chamber defined by said cylinder head, said cylinder, and said power piston;
a crankshaft, with said power piston being attached to said crankshaft by a connecting rod;
a fuel system for introducing fuel into the combustion chamber;
a boost piston for initiating timed combustion of fuel within the combustion chamber, with said boost piston being housed within a wall of said combustion chamber such that when the boost piston moves from a base position to an extended position the effective compression ratio of the cylinder increases;
a driver for moving the boost piston from a base position to an extended position during successive compression strokes of the engine, so as to cause fuel within the combustion chamber to burn in response to movement of the boost piston;
a controller for operating the driver so as to control not only the timing of the movement of the boost piston but also the amount by which the boost piston increases the compression ratio of the engine; and
a follower which engages said boost piston and which is effective to selectively alter the extent to which the boost piston extends into said combustion chamber. - View Dependent Claims (13, 14, 15, 16)
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Specification