Quote:
Originally Posted by redpoint5
I'm not understanding yet. Cummins makes the motors, not the particulate filters or the urea injectors, or the wheel sensors, or any of the other sensors that inform a vehicle that it's on a dyno or open road. How are they responsible for any of that? They don't even make the fuel pumps that feed the fuel to the motor. Bosch makes those.
Culpability would fall on whoever programs the ECU to operate differently depending on dyno vs normal operation.
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When we buy an engine from Cummins for one of our vehicles it is purchased as a turnkey package. That package includes everything from the intake including the aftertreatment, fuel pump, and ECM mapping. There are years of testing and development that we pay them many, many millions of dollars to do for us. Cummins certifies the engine as a complete package and we can make no modifications to it.
The fuel pump comes installed on the engine. Bosch is a subcontractor to Cummins
EDIT: Again, 14,000 lb GVW is a key defining line. The rules are different above and below that rating. You are describing how things work under 14,000 lbs.