Sounds strange when gearboxes axles and diff systems are waaay more expensive than hydraulic drivelines are

Even riding lawn mowers have been using this for decades :)

It's the most simple transmission and can probably the most efficient one out there, which is why it makes sense to use it on combine harvesters & such.

My only questions (for drag racing purposes) are how much hp these could handle? What wears down/breaks? Does the fluid get too hot? How do the cylinder walls wear under heavy load? How much pressure can the seals hold? Can it be made lightweight enough to compete with geared transmissions

Wait what? That's not how it works. It's a variable piston pump connected to a fixed displacement piston motor in this video.

Hi Preston, thank you for your nice comment. I really appreciate that you take your time and let me know that it helped you. Comments like yours makes me keep going.

Please add audio to this video clip we are not able to hear voice

Thank you for your visit and nice comment.

Simpsons videos please

Simpsons video please

Thank you for visiting my channel and your comment. As far as friction goes, in nature there are frictions everywhere. Every operation one way or another has a friction.

I don't know. However, it is used in farm machines.

I think that Hydrostatic transmission are not as efficient as geared transmissions. Also they may require more maintenance. Someone more experienced in this subject may give us better answer I hope.

interesting....thanks!

mixanthony

cost!

efficiency decreases with speed

As the other guy said, at higher RPM the efficiency decreases. So, it's great for combine harvesters & alike, but not great for bikes if you care about top speed. In a normal belt CVT, you don't have that much of a loss at higher RPM + it's way more simple in practise.

There has been uses of Teflon { = poly te tra fluor ethylene } coted even in hydraulic systems and Otto two stroke cycle engines but these all went to way-side due to the costs and up keep of these parts. But Teflon is the only way to use water as a hydraulic fluid in such a system. but the water must be kept ultra clean at all times, this means lots of maintenance cycles which would raise the operating cost to own such as these. So designers just stick with the tried and trusted methods. Look at American Motors Corp {AMC}, Chrysler, and even GM all these car makers got into having many lots maintenance cycles during the warranties They All went broke but AMC got bought by Chrysler who got helped by US government and GM reorganise too, with help of the US government. Both are now making cars and trucks that fewer maintenance cycle during warranty. So if it will cost the user to much time and/or money, the user will stop buying your products. Also do not get the oil companies upset at you. They just might change the rating method on you without telling you, without enough time to retool you product to use the new stuff. IE: Chrysler Lean burn carburetors ran very poorly for a little while back in the nearly the middle 1970's. The fuel called gasoline octane rating when from middle of the Lean to Riches Richness Curve to the middle of the middle to full Richness to middle richness at the same octane value plus a small amount. If you want to do the math here it is in full as per FAA approved classes full Rich mixture is 100 Octane and full Lean mixture which is 70 Octane, making the half way point being 85 Octane rating 100-70 =30 30/2 == 15 then 70 Octane plus 15 equals 85 Octane dead middle of the full Octane rating curve. But if take the middle mean rich curve that is about 87.4 Octane M.R.C. or less when mean rich is the above 85 Octane is the middle of the first curve while the second curve is around 87 Octane that is say 92.5 Octane full rich and 85 = 175/2 = 87.5 well that the number over simplified there is compression rate here which gets canceled out in the algy-math but is to say the percents by volume ratio for real gasoline was 7.625% oxygen to fuel and oxygen is 1/5 air aprox! for full lean mix and very close to 1.3686% Air to one part fuel for a full max mix while mean rich is 1/2 way from middle to 1/2 full rich to middle richness of 85 Octane. And then offset the this by the required 10% Ethanol by 10% of 88.5 time 90% {0.9} you will finally get the new mean mean richness 79.875 Octane middle of middle of that you get 84.46875 Octane IE: 87 Octane there about close enough for government work. Now Many may have go through hoops to get their, Please believe that most just cancel out when expand to full Algebra mathematics to do this until you are in to such or that you want to be there internet courses to back to speed or even teach you the full workings of math all of it right here on the internet. I say go for it. and then see that my have over simplified it. or may have errored which possible, I am only human but go proof it your self.

Infinitely variable and has basically nothing to break.

It could transfer more force. The liquid transfer the force along the axis. It's good for heavy load or long-distance, i.e drilling.

Hello hidraulikaval foglalkozol?

Robert Ienei erdőkkel foglalkozom. és van ilyen meghajtású gépem, de a hidrohajtás egy kalap szart se ér.ha javíttatni akarod bosch-rexroth hoz véletlen se kerüljön mert egy vagyont kérnek el, és továbbra se fog rendesen működni semmi. múlt év augusztus óta szarakodok velük, de semmit se ér.

would the new tranny be a torque converter auto or a proper non-synchro manual with a clutch?

10babiscar proper non-synchro with a manual clutch. works a lot better instantly. no more oil spills, no need to rev the engine before it starts to roll, vastly decreased fuel consumption ever since. far better than this kindof junk.

You cant be the efficiency of a mechanical clutch and gears. I have a heavy vehicle licence but i imagine it would be a bit tricky driving a nonsynchro off road and at low speed, so good luck :)