Why HHVs?

HHVs are used for one major reason and that is to increase fuel economy. Increasing fuel economy reduces emissions and lowers the money spent on fuel. Hydraulic hybrid technology has many uses in many different fields. HHVs have been applied to urban delivery trucks, refuse haulers, SUVs, family cars and even military vehicles. The efficiency of the regenerative braking system makes ideal vehicles where stop-and-go traffic is common. These vehicles also normally have a frequent engine off mode which automatically shuts the car off when stopped for a long period of time and when you press the gas the car automatically turns back on and gets going. In general HHVs are important because they are simple, clean, efficient, and cost effective. HHV production is simple since the system can be produced with technology and a manufacturing base that is already available in the United States. Finally HHVs are cost effective because they are inexpensive to manufacture, they have less brake maintenance and have increased fuel efficiency which results in saving thousands of dollars.
 * Series HHVs are very efficient with the ability to increase fuel efficiency from 60 to over 100 percent.
 * These vehicles have a proven reduction of 40 percent in emissions so they are much cleaner than normal internal combustion vehicles.

Comparison of Gas Electirc Vehicles to HHVs
Click the link above to learn the difference between gas electric vehicles and hydraulic hybrid vehicles.

References/Sources
graph and other info

HHV EPA

