Hydraulics Blog

Take the energy value of gasoline, multiply by .15 to get the effective propulsion energy and then multiply by 15 gallons to see how much useful energy you will get out of a tank of gas for the average automobile. Then see what size and pressure accumulator you will need to store the same amount of energy. I'm no hydraulic expert but I don't see this as a viable primary energy storage medium. To use this technology in a hybrid system, makes good sense. Garbage trucks and city buses are good examples of where diesel-hydraulic drive trains can shine.

proponents of hydraulic hybrids are not generally proposing using accumulators for

a primary power source only for recovering some of the energy to be used for

re -accelerating the vehicle.

Additionally the weight of the hydraulic fluids would not be anywhere near the

weight you suggest. Lines would be much smaller and the reservoir can be of minimal

size with proper cooling.

In the UPS hydraulic hybrid trucks, the accumulator and fluid weigh in excess of 1000 lbs, but can only store 1/3 the energy of a Prius battery pack, which weighs 88 lb. The fluid alone is a big part of that 1000 lbs, so I can't see the two systems ever being equal. For large heavy vehicles, moving at low speed and stopping and starting very frequently, (garbage truck, UPS truck to a lesser extent) then there might be an advantage to hydraulics (the motors are compact, high instantaneous power from regen brakes can be stored more effectively -- no Peukert's problems), although even in earthmoving equipment the trend has been toward diesel-electric hybrids. Electrics also have advantages in smoothness of control and quietness.

Good points. But I wouldn't want a quiet garbage truck. Otherwise, I wouldn't know they are coming and I would miss the pick up.

Dear Global Specs,

The technology made public by DaS Energy generates 2400 watts or 3.2 hp. per 1 litre of stroke volume each second. All parts shown schematics.

151hp. or 120,000 watts per second is 5 litre turbine generator 3000 rpm.

Is as yet unconsidered by the auto industry.

Question will 2400 watts per second heater maintain a +27c pool of water.

The cooled R-744 (Co2) micro bubbles rising in water heat takes out 1 litre of 15c heat per second. each second.

Now everytime we stop at the service station it's does feel like being hold uped for real. Too much. Unbeliavable. I saw this cartoon the other day where the pump are actually a bandit hold uping the driver with the fuel gun on his back and his arms up as a robbery in action, wooaauhh... I agree absolutly.

Hopeful they bring it back to $1.00 per Gallon like the good old days to 'TurboBoost' this economy back to business as usual. Imagine that. The other part of the scenario is that all end out to the consumers folks pokets anyway eventually but the pokets are also runing on empty since everything else went Kapouusshh..sky-hi like a rocket to the universe.

Great deal hopefuly this next week things keep on settle down to the 'bottom line' eventually reaching a happy ending after all. In the meantime just hanging in there.

Running on empty,

MC