Cylinder of an internal combustion engine having variable volume

Details Cylinder of an internal combustion engine having variable volume Cylinder of an internal combustion engine having variable volume

1990-01-29

1991-04-02

Dolinar, Andrew M.

Internal-combustion engines

Four-cycle

Variable clearance

123 48C, F02B 1900

Patent

active

050039369

ABSTRACT:
Conventional cylinders of internal combustion engines comprise a cylinder chamber of constant size so that there is an unchangeable compression chamber between the top dead center position of the piston and the cylinder head. To be able to vary the size of the cylinder chamber and thus the volume of the compression chamber and to thereby adjust a respectively optimum compression, the cylinder head of the cylinder of the invention has arranged therein an insert whose position is hydraulically adjustable, the compression chamber being enlarged by lifting the insert, while it is reduced by lowering the insert. The position of the insert is controlled through a microprocessor in conjunction with a lambda probe.

REFERENCES:
patent: 4144851 (1979-03-01), Prosen
patent: 4187808 (1980-02-01), Audox
patent: 4827882 (1989-05-01), Paul et al.

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