Invention Grant
- Patent Title: Combustion control system and method for switching between spark and pilot-ignited operating modes in dual fuel engine
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Application No.: US16355210Application Date: 2019-03-15
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Publication No.: US10982601B2Publication Date: 2021-04-20
- Inventor: Jonathan W. Anders , Bobby John
- Applicant: Caterpillar Inc.
- Applicant Address: US IL Deerfield
- Assignee: Caterpillar Inc.
- Current Assignee: Caterpillar Inc.
- Current Assignee Address: US IL Deerfield
- Agency: Brannon Sowers & Cracraft
- Main IPC: F02D19/00
- IPC: F02D19/00 ; F02D19/06 ; F02M37/00 ; F02B43/12 ; F02M21/02

Abstract:
A method of controlling a dual fuel engine system includes adjusting a phasing control parameter such as air-fuel ratio (AFR), based on a phasing signal to limit an error in a phasing of combustion of gaseous fuel. The cylinder is switched to a dual fuel liquid pilot-ignited mode by commanding direct injection of an early pilot shot of liquid fuel, based on the adjustment to the phasing control parameter, and production of a spark to ignite gaseous fuel in the cylinder. Switching the cylinder to the dual fuel liquid pilot-ignited mode is completed by commanding direct injection of an early pilot shot and a second pilot shot of liquid fuel to ignite gaseous fuel in response to combustion of the early and second pilot shots in the cylinder.
Public/Granted literature
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