US 12,258,895 B1
Safety compliant catalyst heating aftertreatment system
Abhishek Khunte, Maharashtra (IN); William D. Meyer, Columbus, IN (US); Marvin Karugarama, Indianapolis, IN (US); and Kyle Robert Fath, Greenwood, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Filed by Cummins Inc., Columbus, IN (US)
Filed on Dec. 12, 2023, as Appl. No. 18/536,379.
Int. Cl. F01N 3/20 (2006.01)
CPC F01N 3/2013 (2013.01) 22 Claims
OG exemplary drawing
 
1. A prime mover system comprising:
an engine;
an aftertreatment system configured to treat exhaust of the engine;
an electrical power source;
a heater configured to selectably heat the aftertreatment system; and
an electronic control system comprising a first electronic control unit configured to selectably drive the heater using power from the electrical power source, and a second electronic control unit configured to selectably enable and disable operation of the first electronic control unit to drive the heater in response to a feedback received from the first electronic control unit, the second electronic control unit being configured to meet predetermined functional safety requirements, the first electronic control unit being configured not to meet the predetermined functional safety requirements,
wherein the second electronic control unit is configured to selectably enable and disable operation of the first electronic control unit using a first signal sent via a first datalink from a microcontroller of the second electronic control unit to a microcontroller of the first electronic control unit, and a second signal sent via a second datalink from the microcontroller of the second electronic control to interlock circuitry configured to disable a driver of the first electronic control unit.