Hello and the hydraulic car project

[Bicycle Bob]

From the beginning on that audio, it sounds as if he has a replacement for a swash plate hydraulic motor, and is trying to promote it with weak arguments. I am not well versed in industrial power applications. I would hope that electric elevators are regenerative - I don't remember any giant heat sinks in the elevator rooms at school. . .

[theunchosen]

I'm fairly certain elevators are indeed regenerative. Their braking system is all electric. They typically have 2 rails with 2 large electric motors hooked to lines that run to a slider conduit. Another version I've seen in some New York high speed lifts were using the counterweight with high powered magnets attached and dragged it up through a column of copper wires. It avoids any extra frictional devices(motors).

Of course you still lose some because the wires get hot and travel a long way to the top of the system again. . .

[bbraden]

This is being discussed over here:

http://ecomodder.com/forum/showthrea...ted-10330.html

[aerohead]

I would encourage you strongly to look into the mechanical efficiency of modern pumps and hydraulic motors.
With the engine running in it's sweet-spot it might see 32% efficiency ( really good!),but you might lose all that benefit converting it's power to hydraulic pressure and transferring that power through the hydraulic motor.
You might break even,you might come out on the short end of the stick.

[DonR]

THIS CAR TRAVELS 75 MILES ON A SINGLE GALLON OF GASOLINE!


Is this the article?

[dwtaylorpdx]

I have worked in elevator shafts a lot.

Elevator tech is decades old, and most elevators
dump the braking energy into large ceramic load
banks and dump the heat to the air... It takes
an act of god to change elevator control systems.
I wanted to put an electric eye in the shaft to display
then the elevator was at the floor, could not
get approval and it was not going to touch the
elevator in any way...


Dave

[user removed]

Originally Posted by DonR

THIS CAR TRAVELS 75 MILES ON A SINGLE GALLON OF GASOLINE!


Is this the article?

I think this article makes it fairly obvious that hydraulics can be used in a small lightweight vehicle.

30 years ago it was possible with off the shelf components.

Sure it would not be the best for crash worthiness, but that does not detract form the significance of the accomplishment.

It is especially important to understand that the addition of an accumulator was the key to the mileage improvement. Without the surge absorption and application capabilities of the accumulator there was no real improvement.

regards
Mech

[Ruckus]

I am building a hydraulic hybrid as you describe. I found mention of the Mechanix Illustrated article in the Carman patents. I purchased an old copy and posted it online.

Post #36
http://www.hydraulicinnovations.com/...read.php?t=331

He got a verified 38 mpg CITY from a carbureted 6cyl Ford Maverick.
The stock car got 16mpg. So there is proof. He more than doubled the mileage.

The keys are:
1. regenerative braking (hydraulics REALLY beats electrics here)
2. Turn the motor off when not needed (like a prius)
3. run the motor at it's most efficient rpm and load (90%) again, like a prius.

I also show the Mother Earth News schematics of the Ernie Parker car.

Much later in the thread there is some EPA info on a hydraulic hybrid Excursion that doubled it's gas mileage while gaining accelleration and passing performance.

Do not believe those who say hydraulics are inefficient and only for large trucks. Not true. All of industry has relied on hydraulics for over 50 years. There is a reason. Many/most hydraulics are well over 90% efficient these days.

Saying hydraulics are inefficient is like saying electric cars will never work because you had a lead sled with an aircraft starter motor and the thing never worked right. bad design and wrong components = bad design and wrong components.

keep doing research. Read my thread. You are onto something

Cheers