Originally Posted By: cowhorse01
Originally Posted By: A_Harman
When I was a development engineer at Cummins, I used to run hot box tests at rated power for hundreds of hours on engines with 230F coolant temperatures, which drove the oil temperatures to 280F on conventional 15w40. We never worried about the durability. All that my management wanted to know was the exact date that the test would be completed.
Like Dave said, I love credible info. Was that job pretty incredible?
Oh yes, I worked on a couple of advanced development projects in the time I was there, and learned a lot. The Tech Center had 88 test cells, and many of the test cells were running automated endurance test cycles, so there would be engines running rated power (or more) on a round-the-clock basis. Techs assigned to monitor endurance tests would have responsibility for monitoring and maintenance of up to 4 test cells.
The test I always got a kick watching was thermal cycling of the 50-liter KV16. When the fueling was turned on, the torque indicator counted up in thousands of foot-pounds until the engine was running 6000 ft*lbs at 2100 rpm. That was a nice, round 2400 HP, and the engine did that for months on end with only normal maintenance.
Originally Posted By: A_Harman
When I was a development engineer at Cummins, I used to run hot box tests at rated power for hundreds of hours on engines with 230F coolant temperatures, which drove the oil temperatures to 280F on conventional 15w40. We never worried about the durability. All that my management wanted to know was the exact date that the test would be completed.
Like Dave said, I love credible info. Was that job pretty incredible?
Oh yes, I worked on a couple of advanced development projects in the time I was there, and learned a lot. The Tech Center had 88 test cells, and many of the test cells were running automated endurance test cycles, so there would be engines running rated power (or more) on a round-the-clock basis. Techs assigned to monitor endurance tests would have responsibility for monitoring and maintenance of up to 4 test cells.
The test I always got a kick watching was thermal cycling of the 50-liter KV16. When the fueling was turned on, the torque indicator counted up in thousands of foot-pounds until the engine was running 6000 ft*lbs at 2100 rpm. That was a nice, round 2400 HP, and the engine did that for months on end with only normal maintenance.
