Method and apparatus for injecting fuel into a compression-ignition engine
AssigneeGM Global Technology Operations LLC
InventorsXin He, Russell P. Durrett, Gerald P Malta
Life of this patent
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Abstract
A method to manage and control engine operation includes injecting an initial mass of fuel into a combustion chamber to form a combustion charge, monitoring combustion and injecting a main mass of fuel into the combustion chamber substantially coincident with a start of combustion of the combustion charge.
Claims20
A method for controlling combustion in a reciprocating-piston, direct-injection, compression-ignition internal combustion engine including a variable-volume combustion chamber defined by the piston reciprocating in a cylinder, comprising:
- injecting an initial mass of fuel into the combustion chamber early in the compression stroke to form a combustion charge;
- monitoring combustion to determine a start of combustion of the combustion charge;
- and
- injecting a main mass of fuel into the combustion chamber at the end of the compression stroke and substantially coincident with the start of combustion of the combustion charge.
A method for controlling combustion in a reciprocating-piston, direct-injection, compression-ignition internal combustion engine including a variable-volume combustion chamber defined by the piston reciprocating in a cylinder, comprising:
- injecting an initial mass of fuel into the combustion chamber to form a combustion charge during a compression stroke of the piston during low to medium engine load operation;
- monitoring combustion to determine a start of combustion of the combustion charge;
- and
- injecting a main mass of fuel into the combustion chamber at the end of the compression stroke and substantially coincident with a the start of combustion of the combustion charge based upon the monitored combustion.
An internal combustion engine system, comprising:
- a reciprocating-piston, direct-injection, compression-ignition internal combustion engine including a variable-volume combustion chamber defined by the piston reciprocating in a cylinder;
- a device monitoring an engine state correlatable to combustion within the combustion chamber;
- and
- a control system for monitoring output from the device, controlling injection of an initial mass of fuel injection into the combustion chamber early in the compression stroke to establish a combustion charge, monitoring combustion to determine a start of combustion of the combustion charge, and controlling injection of a main mass of fuel into the combustion chamber at the end of the compression stroke and substantially coincident with the start of combustion of the combustion charge.
Dependencies are inferred from the claim text.