
Waste pumps


This is a guest post by John Bell.
In March of 2004 I took a job as a hydraulic pump design engineer at a private company in Auburn Hills, Michigan. The company had a contract with the EPA (NVFEL) in Ann Arbor to design and build prototype hydraulic pumps to be used in hybrid UPS delivery trucks. The project was the brainchild of Charles Gray, who had been with the EPA since its inception, and who retired in 2012. I was happy to further my career and to be involved in this interesting project, to help design a drive train that would use hydraulic pumps and accumulators to capture braking energy and then reuse that energy to accelerate the vehicle again. I believed in the project for the first six months, and then I saw the light. Turns out it was just another wasteful government boondoggle.