US 11,835,016 B2
Supplemental fuel system for compression-ignition engine
Matt Matsukawa, Layton, UT (US)
Assigned to American CNG, LLC, Layton, UT (US)
Filed by American CNG, LLC, Layton, UT (US)
Filed on Aug. 31, 2022, as Appl. No. 17/899,918.
Claims priority of provisional application 63/324,306, filed on Mar. 28, 2022.
Claims priority of provisional application 63/324,420, filed on Mar. 28, 2022.
Claims priority of provisional application 63/324,231, filed on Mar. 28, 2022.
Claims priority of provisional application 63/324,224, filed on Mar. 28, 2022.
Claims priority of provisional application 63/324,447, filed on Mar. 28, 2022.
Claims priority of provisional application 63/324,411, filed on Mar. 28, 2022.
Claims priority of provisional application 63/324,230, filed on Mar. 28, 2022.
Claims priority of provisional application 62/497,357, filed on Sep. 1, 2021.
Prior Publication US 2023/0068444 A1, Mar. 2, 2023
Int. Cl. F02M 21/04 (2006.01); F02M 21/02 (2006.01); F02D 41/00 (2006.01); F02D 41/30 (2006.01); F02D 41/36 (2006.01); F02D 19/06 (2006.01); F02M 35/10 (2006.01); B60Q 9/00 (2006.01); F02D 19/02 (2006.01); F02B 3/06 (2006.01)
CPC F02M 21/047 (2013.01) [B60Q 9/00 (2013.01); F02D 19/023 (2013.01); F02D 19/0605 (2013.01); F02D 19/0607 (2013.01); F02D 19/0642 (2013.01); F02D 19/0665 (2013.01); F02D 19/0673 (2013.01); F02D 19/0678 (2013.01); F02D 19/0681 (2013.01); F02D 41/0027 (2013.01); F02D 41/3035 (2013.01); F02D 41/36 (2013.01); F02M 21/026 (2013.01); F02M 21/0221 (2013.01); F02M 21/0239 (2013.01); F02M 21/0242 (2013.01); F02M 21/0278 (2013.01); F02M 21/0296 (2013.01); F02M 35/10157 (2013.01); F02M 35/10216 (2013.01); F02B 3/06 (2013.01); F02D 2200/021 (2013.01); F02D 2200/503 (2013.01); F02D 2200/60 (2013.01); F02M 21/0215 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A supplemental fuel system for a machine having a compression-ignition engine, the supplemental fuel system comprising:
a supplemental fuel tank configured to store a supplemental fuel, the supplemental fuel configured to supplement a primary fuel used by the compression-ignition engine;
an electronic lock off valve configured to be positioned between the supplemental fuel tank and an air supply system for the compression-ignition engine;
a temperature sensor configured to acquire temperature data regarding a temperature of exhaust gas output by the compression-ignition engine;
a voltage sensor configured to acquire voltage data from a power supply of the machine indicative of a voltage of the power supply, the power supply configured to receive power from an alternator driven by the compression-ignition engine; and
a controller configured to:
monitor the voltage of the power supply based on the voltage data acquired by the voltage sensor;
compare the voltage to a voltage threshold;
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 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;
monitor the temperature of the exhaust gas based on the temperature data acquired by the 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.