Title: Wet biofuel compression ignition

Abstract

A compression ignition engine system allows use of hydrous fuels, in particular hydrous biofuels, with high water content (e.g., 20-85% water). The hydrous fuel is pressurized, and also preferably heated via the engine's exhaust gas, to increase its enthalpy, and is then directly injected into the engine cylinder(s) near top dead center. The system provides brake thermal efficiency increases of 20% or more versus a comparable system using conventional diesel fuel, while allowing the use of inexpensive undistilled or lightly distilled biofuels.

Inventors:

Wickman, David Darin; Kokjohn, Sage Lucas

Issue Date:

2023-03-21

Research Org.:

Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1987235

Patent Number(s):

11608799

Application Number:

17/569,873

Assignee:

Wisconsin Alumni Research Foundation (Madison, WI)

Patent Classifications (CPCs):

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02B - INTERNAL-COMBUSTION PISTON ENGINES

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES

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F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02B - INTERNAL-COMBUSTION PISTON ENGINES

F02B2201/02 - Liquid
F02B2201/064 - Liquid and gas
F02B3/06 - with compression ignition
F02B47/02 - the substances being water or steam
F02B7/02 - the fuel in the charge being liquid

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES

F02D41/0025 - {Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures}
F02D41/401 - {Controlling injection timing

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02M - SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF

F02M21/0206 - {Non-hydrocarbon fuels, e.g. hydrogen, ammonia or carbon monoxide}
F02M21/0245 - {High pressure fuel supply systems
F02M21/06 - Apparatus for de-liquefying, e.g. by heating
F02M25/022 - Adding fuel and water emulsion, water or steam
F02M25/0228 - {Adding fuel and water emulsion}
F02M25/03 - into the cylinder {or the pre-combustion chamber}
F02M25/038 - into the cylinder {or the pre-combustion chamber}
F02M31/16 - Other apparatus for heating fuel
F02M53/06 - with fuel-heating means, e.g. for vaporising

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DOE Contract Number:  

SC0020087

Resource Type:

Patent

Resource Relation:

Patent File Date: 01/06/2022

Country of Publication:

United States

Language:

English