US 12,215,647 B1
Method and system for controlling diesel engine emissions by fuel blending
Daniel W. Sonnek, Lake Crystal, MN (US)
Assigned to Clear Torque, LLC, Lake Crystal, MN (US)
Filed by Clear Torque, LLC, Lake Crystal, MN (US)
Filed on Jun. 25, 2024, as Appl. No. 18/753,500.
Int. Cl. F02D 41/30 (2006.01); F02D 41/14 (2006.01)
CPC F02D 41/30 (2013.01) [F02D 41/1439 (2013.01); F02D 2250/36 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system for controlling nitrogen oxide (NOx) production in an engine, the system comprising:
a first control module connected to a first fuel pump that is configured to route diesel from a first fuel tank into an engine cylinder;
a second control module connected to a second fuel pump that is configured to route ethanol from a second fuel tank into the engine cylinder producing a mixture comprising the diesel and ethanol in the engine cylinder; and
an exhaust system comprising a first NOx sensor positioned at an outlet of the engine cylinder, a diesel exhaust fluid (DEF) pump positioned downstream of the first NOx sensor, and a second NOx sensor positioned downstream of the DEF pump;
wherein the ethanol has a concentration in a range from about 140 proof to about 190 proof; and
when the system is operating, the mixture combusts in the engine cylinder to produce exhaust gas comprising NOx, and the exhaust gas routes from the engine cylinder through the exhaust system, wherein the DEF pump provides a vaporized DEF stream to the exhaust gas.