Internal combustion engine system
AssigneeVolvo Truck Corporation
InventorArne Andersson
Life of this patent
Estimating the term…
Abstract
An internal combustion engine system includes a reciprocating compressor for pressurizing a fluid medium and having a compressor cylinder for accommodating a compressor piston. The compressor cylinder has a main cylinder volume and a secondary adjustable volume in fluid communication with the main cylinder volume so as to provide a variable geometrical compression ratio.
Claims15
An internal combustion engine system comprising a reciprocating compressor for pressurizing a fluid medium and having a compressor cylinder for accommodating a compressor piston, said compressor cylinder having a main cylinder volume and a secondary adjustable volume in fluid communication with the main cylinder volume so as to provide a variable geometrical compression ratio, wherein the secondary adjustable volume comprises at least a plurality of volume compartment portions which are capable of separation by at least one valve, and wherein each of the plurality of volume compartment portions are individually arranged in fluid communication with the main cylinder volume via the at least one valve.
A method for controlling a geometrical compression ratio of a reciprocating compressor of an internal combustion engine system, said reciprocating compressor is configured to pressurize a fluid medium and having a compressor cylinder for accommodating a compressor piston, said compressor cylinder having a main cylinder volume and a secondary adjustable volume in fluid communication with the main cylinder volume so as to provide a variable geometrical compression ratio wherein the secondary adjustable volume comprises at least a plurality of volume compartment portions which are capable of separation by at least one valve, and wherein each of the plurality of volume compartment portions are individually arranged in fluid communication with the main cylinder volume via the at least one valve, wherein the method comprising the steps of:
- adjusting the volume of the secondary adjustable volume to a first adjusted volume;
- and
- pressurizing said fluid medium to a first geometrical compression ratio by a displacement of the compressor piston from a bottom dead center to top dead center.
Dependencies are inferred from the claim text.