IP Library › Granted Patent US 12,510,043
Granted Patent B2
US 12,510,043 · App. 18/887,206 · Granted Dec 30, 2025

Supplemental fuel system for compression-ignition engine

Inventor: Matt Matsukawa (Layton, UT)
F02M21/047B60Q9/00F02D19/023F02D19/0605F02D19/0607F02D19/0642F02D19/0665F02D19/0673F02D19/0678F02D19/0681F02D41/0027F02D41/3035F02D41/36F02M21/0221F02M21/0239F02M21/0242F02M21/026F02M21/0278F02M21/0296F02M35/10157F02M35/10216F02B3/06F02D2200/021F02D2200/503F02D2200/60F02M21/0215
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Quick Facts
Patent No.
US 12,510,043
App. No.
18/887,206
Granted
Dec 30, 2025
Kind
B2
Abstract

A supplemental fuel system for a machine with an engine is configured to monitor a voltage of a power supply of the machine based on voltage data acquired by a voltage sensor where the power supply is configured to receive power from an alternator driven by the engine, compare the voltage to a voltage threshold, and control an electronic lock off valve positioned between a supplemental fuel tank and an air supply system for the engine such that the electronic lock off valve is (i) closed to prevent a supplemental fuel from being provided from the supplemental fuel tank to the to the air supply system in response to the voltage being less than the voltage threshold and (ii) open or openable to permit the supplemental fuel to be provided to the air supply system in response to the voltage being greater than the voltage threshold.

Claims (44)

1 . A supplemental fuel system for a machine with an engine, the supplemental fuel system comprising:

a non-transitory computer-readable medium having instructions stored thereon that, when executed by one or more processors, cause the one or more processors to:

monitor a voltage of a power supply of the machine based on voltage data acquired by a voltage sensor, wherein the power supply is configured to receive power from an alternator driven by the engine;

compare the voltage to a voltage threshold; and

control an electronic lock off valve positioned between a supplemental fuel tank and an air supply system for the engine such that the electronic lock off valve is (i) closed to prevent a supplemental fuel from being provided from the supplemental fuel tank to the to the air supply system in response to the voltage being less than the voltage threshold and (ii) open or openable to permit the supplemental fuel to be provided to the air supply system in response to the voltage being greater than the voltage threshold.

2 . The supplemental fuel system of claim 1 , further comprising the voltage sensor.

3 . The supplemental fuel system of claim 1 , wherein the instructions cause the one or more processors to:

monitor a temperature of the engine based on temperature data acquired by a temperature sensor;

compare the temperature to a temperature range; and

control the electronic lock off valve such that the electronic lock off valve is (i) closed to prevent the supplemental fuel from being provided to the air supply system in response to the temperature being less than the temperature range, (ii) closed to prevent the supplemental fuel from being provided to the air supply system in response to the temperature being greater than the temperature range, and (iii) open or openable to permit the supplemental fuel to be provided to the air supply system in response to the temperature being within the temperature range.

4 . The supplemental fuel system of claim 3 , further comprising the temperature sensor.

5 . The supplemental fuel system of claim 3 , wherein the temperature is a temperature of a water jacket of the engine.

6 . The supplemental fuel system of claim 1 , wherein the instructions cause the one or more processors to:

monitor a temperature of exhaust gas output by the engine based on temperature data acquired by a temperature sensor;

compare the temperature to a temperature threshold; and

control the electronic lock off valve such that the electronic lock off valve is (i) closed to prevent the supplemental fuel from being provided to the air supply system in response to the temperature being greater than the temperature threshold and (ii) open or openable to permit the supplemental fuel to be provided to the air supply system in response to the temperature being less than the temperature threshold.

7 . The supplemental fuel system of claim 1 , further comprising the supplemental fuel tank and the electronic lock off valve.

8 . The supplemental fuel system of claim 1 , further comprising a nozzle configured to be positioned (a) downstream of the electronic lock off valve and (b) within a conduit of the air supply system, the nozzle configured to provide the supplemental fuel to air flowing through the conduit.

9 . The supplemental fuel system of claim 8 , wherein the nozzle is configured to be positioned within the conduit between an air intake and a turbocharger of the air supply system.

10 . The supplemental fuel system of claim 8 , wherein the nozzle is a Venturi nozzle that is configured to generate a vacuum as the air flowing through the conduit flows through the nozzle, and wherein the nozzle is configured to receive a flow of the supplemental fuel based on the vacuum.

11 . A supplemental fuel system for a machine with an engine, the supplemental fuel system comprising:

a non-transitory computer-readable medium having instructions stored thereon that, when executed by one or more processors, cause the one or more processors to:

monitor a voltage of a power supply of the machine based on voltage data acquired by a voltage sensor, wherein the power supply is configured to receive power from an alternator driven by the engine;

monitor at least one of (a) a first temperature of the engine based on first temperature data acquired by a first temperature sensor or (b) monitor a second temperature of exhaust gas output by the engine based on second temperature data acquired by a second temperature sensor; and

control an electronic lock off valve positioned between a supplemental fuel tank and an air supply system for the engine based on (a) the voltage and (b) the at least one of the first temperature or the second temperature.

12 . The supplemental fuel system of claim 11 , wherein the instructions cause the one or more processors to monitor the first temperature of the engine.

13 . The supplemental fuel system of claim 11 , wherein the instructions cause the one or more processors to monitor the second temperature of the exhaust gas.

14 . The supplemental fuel system of claim 11 , wherein the instructions cause the one or more processors to:

monitor the first temperature of the engine and the second temperature of the exhaust gas; and

control the electronic lock off valve based on the voltage, the first temperature, and the second temperature.

15 . The supplemental fuel system of claim 11 , further comprising the supplemental fuel tank and the electronic lock off valve.

16 . The supplemental fuel system of claim 11 , further comprising a nozzle configured to be positioned (a) downstream of the electronic lock off valve and (b) within a conduit of the air supply system, the nozzle configured to provide supplemental fuel to air flowing through the conduit.

17 . The supplemental fuel system of claim 16 , wherein the nozzle is a Venturi nozzle that is configured to generate a vacuum as the air flowing through the conduit flows through the nozzle.

18 . The supplemental fuel system of claim 17 , wherein the nozzle is configured to receive a flow of the supplemental fuel based on the vacuum.

19 . A supplemental fuel system for a machine with an engine, the supplemental fuel system comprising:

a supplemental fuel tank;

a nozzle configured to provide a supplemental fuel from the supplemental fuel tank to a conduit of an air system for the engine;

an electronic valve configured to be positioned between the supplemental fuel tank and the nozzle;

a non-transitory computer-readable medium having instructions stored thereon that, when executed by one or more processors, cause the one or more processors to:

monitor a voltage of a power supply of the machine, wherein the power supply is configured to receive power from an alternator driven by the engine; and

control the electronic valve based on the voltage.

20 . The supplemental fuel system of claim 19 , wherein the instructions cause the one or more processors to:

monitor at least one of (a) a first temperature of the engine or (b) monitor a second temperature of exhaust gas output by the engine; and

control the electronic valve based on (a) the voltage and (b) the at least one of the first temperature or the second temperature.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 1, 2025
From: MATSUKAWA, MATT
To: AMERICAN CNG, LLC
Reel/Frame 073075/0700 →
Continuity (10)
Continuation 17899923 · Aug 31, 2022
Provisional Application 63324420 · Mar 28, 2022
Provisional Application 63324411 · Mar 28, 2022
Provisional Application 63324306 · Mar 28, 2022
Provisional Application 63324224 · Mar 28, 2022
Provisional Application 63324447 · Mar 28, 2022
Provisional Application 63324230 · Mar 28, 2022
Provisional Application 63324231 · Mar 28, 2022
Provisional Application 62497357 · Sep 1, 2021
Related Publication 20250012241A1 · Jan 9, 2025
References Cited (226)
US 2143194A · Holzapfel · 1939 [cited by applicant]
US 2209206A · Peduzzi · 1940 [cited by applicant]
US 2544325A · Johnson, Jr. et al. · 1951 [cited by applicant]
US 2563228A · Ensign · 1951 [cited by applicant]
US 2781752A · Van Den Bussche · 1957 [cited by applicant]
US 2799564A · Ensign · 1957 [cited by applicant]
US 2821373A · Olson · 1958 [cited by applicant]
US 2868630A · Ensign · 1959 [cited by applicant]
US 2894829A · Harrison et al. · 1959 [cited by applicant]
US 2899184A · Olson · 1959 [cited by applicant]
US 3395899A · Kopa · 1968 [cited by applicant]
US 3484220A · Jones · 1969 [cited by applicant]
US 3648988A · Dibert · 1972 [cited by applicant]
US 3664818A · Kramer · 1972 [cited by applicant]
US 3837628A · Bartholomew · 1974 [cited by applicant]
US 3843338A · Zonker · 1974 [cited by applicant]
US 4073832A · McGann · 1978 [cited by applicant]
US 4163434A · Tsukamoto · 1979 [cited by examiner]
US 4174690A · Sumiyoshi · 1979 [cited by applicant]
US 4250856A · Abbey · 1981 [cited by examiner]
US 4308835A · Abbey · 1982 [cited by examiner]
US 4335697A · McLean · 1982 [cited by applicant]
US 4347822A · Casey · 1982 [cited by applicant]
US 4352677A · Jones · 1982 [cited by applicant]
US 4375795A · Billingsley · 1983 [cited by applicant]
US 4387685A · Abbey · 1983 [cited by applicant]
US 4437448A · Billingsley · 1984 [cited by applicant]
US 4463734A · Akeroyd · 1984 [cited by applicant]
US 4476827A · Basaglia et al. · 1984 [cited by applicant]
US 4482508A · Onaka · 1984 [cited by examiner]
US 4499885A · Weissenbach et al. · 1985 [cited by applicant]
US 4499887A · Billingsley et al. · 1985 [cited by applicant]
US 4517928A · Wolters · 1985 [cited by applicant]
US 4519341A · McGarr · 1985 [cited by examiner]
US 4519367A · Nomura · 1985 [cited by applicant]
US 4559185A · Seto et al. · 1985 [cited by applicant]
US 4564298A · Gritters et al. · 1986 [cited by applicant]
US 4619240A · Bedford et al. · 1986 [cited by applicant]
US 4694802A · Lowi, Jr. · 1987 [cited by applicant]
US 4704997A · Endo et al. · 1987 [cited by applicant]
US 4802507A · Willson · 1989 [cited by applicant]
US 4838295A · Miller · 1989 [cited by applicant]
US 4909209A · Takahasi · 1990 [cited by applicant]
US 4953516A · Van Der Weide et al. · 1990 [cited by applicant]
US 4991561A · Gerassimov et al. · 1991 [cited by applicant]
US 5070851A · Janisch · 1991 [cited by applicant]
US 5136986A · Jensen · 1992 [cited by applicant]
US 5176448A · King et al. · 1993 [cited by applicant]
US 5224457A · Arsenault et al. · 1993 [cited by applicant]
US 5345918A · Lambert · 1994 [cited by applicant]
US 5355854A · Aubee · 1994 [cited by applicant]
US 5370097A · Davis · 1994 [cited by applicant]
US 5386145A · Boswell · 1995 [cited by applicant]
US 5408978A · Davis · 1995 [cited by applicant]
US 5595163A · Nogi et al. · 1997 [cited by applicant]
US 5755254A · Carter et al. · 1998 [cited by applicant]
US 5797379A · Sharples · 1998 [cited by examiner]
US 5809970A · Smith et al. · 1998 [cited by applicant]
US 5868121A · Brown et al. · 1999 [cited by applicant]
US 6003478A · Huber · 1999 [cited by applicant]
US 6050246A · Abdelmesih · 2000 [cited by applicant]
US 6145494A · Klopp · 2000 [cited by applicant]
US 6250260B1 · Green · 2001 [cited by applicant]
US 6694242B2 · Wong · 2004 [cited by applicant]
US 6863034B2 · Kern et al. · 2005 [cited by applicant]
US 6880535B2 · Sorter et al. · 2005 [cited by applicant]
US 6901889B1 · Ritter et al. · 2005 [cited by applicant]
US 6955160B1 · Konopacki et al. · 2005 [cited by applicant]
US 7000573B2 · Kruger · 2006 [cited by applicant]
US 7019626B1 · Funk · 2006 [cited by applicant]
US 7066155B2 · Uhde et al. · 2006 [cited by applicant]
US 7222015B2 · Davis et al. · 2007 [cited by applicant]
US 7225763B2 · Ritter et al. · 2007 [cited by applicant]
US 7387091B2 · Ritter · 2008 [cited by applicant]
US 7509209B2 · Davis et al. · 2009 [cited by applicant]
US 7533634B2 · Ritter et al. · 2009 [cited by applicant]
US 7823562B2 · Duineveld et al. · 2010 [cited by applicant]
US 8267064B2 · Martin et al. · 2012 [cited by applicant]
US 8412439B2 · Warner et al. · 2013 [cited by applicant]
US 9031763B2 · Green · 2015 [cited by applicant]
US 9057331B2 · Hoshi et al. · 2015 [cited by applicant]
US 9328673B2 · Inoue et al. · 2016 [cited by applicant]
US 9394841B1 · Green · 2016 [cited by applicant]
US 9410490B2 · Kolhouse et al. · 2016 [cited by applicant]
US 9752515B1 · Stroup · 2017 [cited by applicant]
US 9845744B2 · Green · 2017 [cited by applicant]
US 9857802B2 · Yates et al. · 2018 [cited by applicant]
US 9885318B2 · Green · 2018 [cited by applicant]
US 9988990B2 · Bhatt et al. · 2018 [cited by applicant]
US 10100723B2 · Kolhouse et al. · 2018 [cited by applicant]
US 10100781B1 · Catchings et al. · 2018 [cited by applicant]
US 10161318B2 · Stroup · 2018 [cited by applicant]
US 10287943B1 · Schiltz · 2019 [cited by applicant]
US 10330032B2 · Benner et al. · 2019 [cited by applicant]
US 10371069B2 · Bzymek et al. · 2019 [cited by applicant]
US 10578034B2 · Macdonald · 2020 [cited by applicant]
US 10815913B2 · Bruner et al. · 2020 [cited by applicant]
US 10890106B2 · Bach · 2021 [cited by applicant]
US 11073122B2 · Burns et al. · 2021 [cited by applicant]
US 11105278B2 · Atterberry et al. · 2021 [cited by applicant]
US 11131273B2 · Abei et al. · 2021 [cited by applicant]
US 11181051B2 · Klãœting et al. · 2021 [cited by applicant]
US 11236665B2 · Bach · 2022 [cited by applicant]
US 11255279B2 · Schiltz et al. · 2022 [cited by applicant]
US 12116959B2 · Matsukawa · 2024 [cited by examiner]
US 20010032628A1 · Goto et al. · 2001 [cited by applicant]
US 20020007805A1 · Green · 2002 [cited by applicant]
US 20020014227A1 · Girouard · 2002 [cited by applicant]
US 20020029770A1 · Heffel et al. · 2002 [cited by applicant]
US 20020083980A1 · Nakajima et al. · 2002 [cited by applicant]
US 20020185086A1 · Newman et al. · 2002 [cited by applicant]
US 20030020033A1 · Wang · 2003 [cited by applicant]
US 20030234002A1 · Rivera · 2003 [cited by examiner]
US 20040002053A1 · Coruzzi et al. · 2004 [cited by applicant]
US 20040020537A1 · Girouard · 2004 [cited by applicant]
US 20040089279A1 · McLaughlin et al. · 2004 [cited by applicant]
US 20040111210A1 · Davis et al. · 2004 [cited by applicant]
US 20040139943A1 · Kern et al. · 2004 [cited by applicant]
US 20040173192A1 · Sorter et al. · 2004 [cited by applicant]
US 20050104234A1 · Goto · 2005 [cited by applicant]
US 20060054144A1 · Tokunaga · 2006 [cited by applicant]
US 20060168958A1 · Vetrovec · 2006 [cited by applicant]
US 20060225715A1 · Ohashi et al. · 2006 [cited by applicant]
US 20060245296A1 · Nishioka et al. · 2006 [cited by applicant]
US 20070125321A1 · Ritter · 2007 [cited by applicant]
US 20070152355A1 · Hartley · 2007 [cited by applicant]
US 20070157909A1 · Tokunaga · 2007 [cited by applicant]
US 20070157912A1 · Ritter et al. · 2007 [cited by applicant]
US 20070295316A1 · Davis et al. · 2007 [cited by applicant]
US 20080022983A1 · Martindale · 2008 [cited by applicant]
US 20080290531A1 · Nickels et al. · 2008 [cited by applicant]
US 20090071438A1 · Shiraishi et al. · 2009 [cited by applicant]
US 20090071439A1 · Shiraishi et al. · 2009 [cited by applicant]
US 20090076709A1 · Shiraishi et al. · 2009 [cited by applicant]
US 20090088950A1 · Fisher et al. · 2009 [cited by applicant]
US 20090126691A1 · Bach · 2009 [cited by applicant]
US 20090287392A1 · Thomas · 2009 [cited by applicant]
US 20090301443A1 · Kojima et al. · 2009 [cited by applicant]
US 20100089364A1 · Flanagan et al. · 2010 [cited by applicant]
US 20100263382A1 · Mancini et al. · 2010 [cited by applicant]
US 20100269796A1 · Namatame · 2010 [cited by applicant]
US 20110114193A1 · Chen · 2011 [cited by applicant]
US 20110114194A1 · Chen · 2011 [cited by applicant]
US 20110180042A1 · Johnson et al. · 2011 [cited by applicant]
US 20120004824A1 · Milton et al. · 2012 [cited by applicant]
US 20120197514A1 · Ono et al. · 2012 [cited by applicant]
US 20120199102A1 · Hoefer et al. · 2012 [cited by applicant]
US 20120204975A1 · Chen · 2012 [cited by applicant]
US 20120266846A1 · Kilbourne · 2012 [cited by applicant]
US 20120310509A1 · Pardo et al. · 2012 [cited by applicant]
US 20130047959A1 · Holm · 2013 [cited by applicant]
US 20130112171A1 · Matsukawa · 2013 [cited by applicant]
US 20130247876A1 · Ninomiya et al. · 2013 [cited by applicant]
US 20130333671A1 · Walser et al. · 2013 [cited by applicant]
US 20140299099A1 · Yoshizaki · 2014 [cited by examiner]
US 20140360473A1 · Sturman · 2014 [cited by applicant]
US 20140373822A1 · Rosswurm et al. · 2014 [cited by applicant]
US 20150020770A1 · Green · 2015 [cited by applicant]
US 20150020771A1 · Green · 2015 [cited by applicant]
US 20150025774A1 · Green · 2015 [cited by applicant]
US 20150068500A1 · Inoue et al. · 2015 [cited by applicant]
US 20150233330A1 · Matsukawa · 2015 [cited by applicant]
US 20150240735A1 · Nakazono et al. · 2015 [cited by applicant]
US 20150240738A1 · Yerace et al. · 2015 [cited by applicant]
US 20150346733A1 · Yates et al. · 2015 [cited by applicant]
US 20160040628A1 · Braun · 2016 [cited by applicant]
US 20160061685A1 · Ishida et al. · 2016 [cited by applicant]
US 20160195050A1 · Green · 2016 [cited by applicant]
US 20160222902A1 · Otsubo et al. · 2016 [cited by applicant]
US 20160222920A1 · Schwark et al. · 2016 [cited by applicant]
US 20160273436A1 · Imai et al. · 2016 [cited by applicant]
US 20170009670A1 · Sorge et al. · 2017 [cited by applicant]
US 20170009681A1 · Green · 2017 [cited by applicant]
US 20180223774A1 · Walser et al. · 2018 [cited by applicant]
US 20180347509A1 · Wouters · 2018 [cited by applicant]
US 20190055904A1 · Kejha · 2019 [cited by applicant]
US 20190154202A1 · Cho et al. · 2019 [cited by applicant]
US 20190293027A1 · Walser et al. · 2019 [cited by applicant]
US 20190331023A1 · Harknett et al. · 2019 [cited by applicant]
US 20190390616A1 · Del Valle Echavarri et al. · 2019 [cited by applicant]
US 20200032722A1 · Klãœting et al. · 2020 [cited by applicant]
US 20200200106A1 · Stenlåås · 2020 [cited by examiner]
US 20200284364A1 · Yu et al. · 2020 [cited by applicant]
US 20200408155A1 · Sanders et al. · 2020 [cited by applicant]
US 20210071557A1 · Renault · 2021 [cited by applicant]
US 20210231062A1 · Lundgren · 2021 [cited by applicant]
US 20210310430A1 · Fisher et al. · 2021 [cited by applicant]
US 20210404371A1 · Yerace et al. · 2021 [cited by applicant]
US 20220099049A1 · Walser et al. · 2022 [cited by applicant]
US 20220136451A1 · Guglielmo et al. · 2022 [cited by applicant]
US 20220170409A1 · Lee et al. · 2022 [cited by applicant]
US 20220178318A1 · Schiltz et al. · 2022 [cited by applicant]
US 20230054901A1 · Wolk · 2023 [cited by applicant]
US 20230064061A1 · Matsukawa · 2023 [cited by applicant]
US 20230064208A1 · Matsukawa · 2023 [cited by applicant]
US 20230068444A1 · Matsukawa · 2023 [cited by applicant]
US 20230068586A1 · Matsukawa · 2023 [cited by applicant]
US 20230070025A1 · Matsukawa · 2023 [cited by applicant]
US 20230101065A1 · Matsukawa · 2023 [cited by applicant]
CN 203308606U · 2013 [cited by applicant]
CN 105370446A · 2016 [cited by applicant]
CN 110023613A · 2019 [cited by applicant]
DE 10008959A1 · 2001 [cited by applicant]
DE 102009017223A1 · 2010 [cited by applicant]
DE 102016121006A1 · 2017 [cited by applicant]
EP 0102119A · 1984 [cited by applicant]
EP 1128053A2 · 2001 [cited by applicant]
EP 4137685A1 · 2023 [cited by applicant]
FR 888096A · 1943 [cited by applicant]
FR 2546231A1 · 1984 [cited by applicant]
GB 1182882A · 1970 [cited by applicant]
GB 1192275A · 1970 [cited by applicant]
JP 59037251A · 1984 [cited by applicant]
JP 5996464A · 1984 [cited by applicant]
JP 59221440A · 1984 [cited by applicant]
JP 60017260A · 1985 [cited by applicant]
JP 2000303909A · 2000 [cited by applicant]
JP 2011017333A · 2011 [cited by applicant]
JP 4767458B2 · 2011 [cited by applicant]
KR 20000003102A · 2000 [cited by applicant]
KR 20040017643A · 2004 [cited by applicant]
KR 102389088B1 · 2022 [cited by applicant]
WO WO2006010809A1 · 2006 [cited by applicant]
WO WO2012017856A1 · 2012 [cited by applicant]
WO WO2014026778A1 · 2014 [cited by applicant]
PCT International Search Report and Written Opinion for International Application No. PCT/US22/42131 Mailing Date Jan. 27, 2023, 25 pages. [cited by applicant]