Invention Grant
US09546941B2 Method and system for estimating the specific gravity of an unknown fuel source in a multi-fuel engine
有权
用于估计多燃料发动机中未知燃料源的比重的方法和系统
- Patent Title: Method and system for estimating the specific gravity of an unknown fuel source in a multi-fuel engine
- Patent Title (中): 用于估计多燃料发动机中未知燃料源的比重的方法和系统
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Application No.: US14703587Application Date: 2015-05-04
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Publication No.: US09546941B2Publication Date: 2017-01-17
- Inventor: Jason Rasmussen , Brett Zook , Baoyang Deng , Arvind Sivasubramanian
- Applicant: Caterpillar Inc.
- Applicant Address: US IL Peoria
- Assignee: Caterpillar Inc.
- Current Assignee: Caterpillar Inc.
- Current Assignee Address: US IL Peoria
- Agency: Miller, Matthias & Hull LLP
- Main IPC: F02D19/00
- IPC: F02D19/00 ; G01N9/26 ; F02B43/10 ; F02D19/02 ; G01N9/36 ; G01N9/00
Abstract:
A method for estimating a specific gravity of a gaseous fuel is described. The gaseous fuel may power an engine and the engine may include a cylinder, a gas valve configured to supply an intake port of the cylinder with the gaseous fuel, a gas rail configured to deliver the gaseous fuel to the gas valve, and a microprocessor adapted to perform the method. The method may comprise establishing a pressure wave in the gas rail by opening and closing the gas valve, wherein the pressure wave travels at the speed of sound in the gaseous fuel. The method may further comprise determining a frequency of the pressure wave in the gas rail, and estimating the specific gravity of the gaseous fuel based on the frequency of the pressure wave.
Public/Granted literature
- US20160327464A1 Method and System for Estimating the Specific Gravity of an Unknown Fuel Source in a Multi-fuel Engine Public/Granted day:2016-11-10
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