During the prototype process with the 2002 Chevy truck from Denver International Airport, our engineering team made some major modifications to our hydraulic hybrid system design. These revisions are significant and we are working to patent the following innovations:
1. Power Transfer Module. Our PTM replaces the vehicle’s torque converter. Since it replaces an existing part, no modifications are required for the drivetrain (such as driveshaft changes, transmission change-outs, etc.) which significantly reduces the cost and increases vehicle efficiency since the torque converter is a major source of inefficiency in stop-and-go driving.
2. Dual Tank System. HHS has designed a two-in-one system with proprietary valves that reduces connections and hoses by surrounding a carbon fiber high pressure accumulator with an aluminum low pressure reservoir. The design reduces connections and hoses, a significant benefit when dealing with 5,000 PSI. Standard steel accumulators weigh over 500 pounds, the carbon fiber tank weighs in under 150 pounds, another way to increase system efficiency. No one else has a certified carbon fiber accumulator and Eaton has signed an NDA to explore using ours in their system.
3. Controls System. The HHS controls system is proprietary and is unique because we are tying into the On-Board Diagnostics of the vehicle to which the system is applied which allows us to achieve ten percent better fuel mileage improvements when used in conjunction with our PTM.
4. Hydraulic System. The hydraulic system is uniquely configured to utilize a standard and proven variable displacement pump in conjunction with a specially-designed valve manifold and uniquely configured high and low pressure tank system.