V700 with hydrostatic front wheel drive
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
Created:
Updated:
Thanks to Loris Secolin and Charlie Mullendore of Antietam Classic Cycle for sending me this information.
Explanation of the hydrostatic front wheel drive system (Italian)
Walk around of the entire motorcycle (Italian)
Information from the auction site, translated from Italian to English by Loris.
Very good condition, no registration documents.
Manufacturer: Moto Guzzi
- Model: V7 - 2WD
- Displacement: 700
- Year of production:
- Condition: very good
- Registration docs: No documents
- Kilometers: 3261 km
- Frame number: 4978
- Engine number: 6044
- Country: Italia
Two wheel drive
Registered patent
V7 700 cc PA model ex Polizia
Bike is equipped with an oleodinamic transmission system.
It is possible to use rear traction, front traction or both together.
Tested by Motosprint magazine in (tester: Marco Masetti)
Project developed for civil authorities or offroad.
Hydrostatic mechanical hyraulic trascino device.
The aim of the project is to enhance the safety of the vecchie under extreme conditions and to allow it to be used on tricky terrains.
An innovative system that can perfectly match rear and front wheel rotation speeds just by a simple switch.
The standard fuel tank is used for the oil that feeds the transmission system and there is a fuel tank behind rider's seat.
Unique piece.
Bike is located in Modena, Italy
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Patent cover page, translated by Google.
Ministry of Craft Trade Industry
D.G.P.i. - Central Patent Office
Patent for Industrial Invention
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Photo courtesy of Catawiki Auction.
Road: topicality-test-surveys-tourism-technique-variety
An interesting patent
Integral revolution
Author: Marco Masetti
Two enthusiasts of S. Matteo Decima, Giovanni Gessi and Emilio Varricchio, have designed, designed and built a prototype four-wheel drive for motorcycles, patenting it. It is possible to move with the rear wheel drive, with the front wheel drive or with both.
Spresso motosprint presents a preview, very often worldwide, of the more or less recent innovations of the great Japanese companies; but we do not only deal with that, but with everything that happens in the world of motorcycles, at any level. In this case our interest has shifted to a revolutionary device that allows four-wheel drive on a motorcycle. This 2x2
transmission applied to motorcycles does not come from the science fiction centers research and development
of the Japanese companies, but from the work and genius of three people who, in addition to designing the device (and patent), have concretized their wonderful idea
creating a working prototype on which we had the opportunity to carry out even a brief dynamic test.
The scenario of the test was not that of a test circuit near Hamamatsu, but a quiet part of the Po valley, between Bologna and Ferrara: San Matteo Decima.
The marvelous idea - The idleness of being able to have a four-wheel drive on the bike has long since tickled the imagination of designers and we have already seen examples of traction on both wheels: the advantages of this system are evident above all on muddy, frozen ground or in case of steep slopes. The four-wheel drive on the bike is therefore a particularly interesting solution in off-road not necessarily competitive or at the top, but above all for "despecialized" uses such as off-road tourism and the supply of motorcycles to civil and military bodies; and it is not to be discarded even of large displacement type super tourer.
The patent holders are the engineer Giovanni Gessi (inventor of several devices and holder of patents especially in the field of oleodynamics) and Emilio Varricchio, construction and consultant builder.
Photo courtesy of Catawiki Auction.
Translated by Google.
In this photo the innovative prototype made by plaster casts and varicchio, which was applied on a Guzzi. The device has been mounted on the front wheel for the moment, but the intention is to move the hydraulic motor inside the hub. The motion to the wheel is transmitted through a tight loop of the chain, which is seen sprouting from the hub both in the two photos on the left and on the right. The transmission clutch is electromagnetically controlled, controlled by a button on the handlebar.
Photo courtesy of Catawiki Auction.
Translated by Google.
In the photo on the left the pulleys that transmit the energy from the crankshaft to the hydraulic pump. On the right, instead, is the pressure gauge that measures the oil pressure, allowing the device to function correctly. Below still an image of the hydraulic motor.
Photo courtesy of Catawiki Auction.
Page translated by Loris Secolin.
THE DEVICE: (IL DISPOSITIVO)
The prototype equipped with the 2wd is a Guzzi V7, choosen as a first step
, waiting for a more modern bike to continue the experimentation. The oleodynamic system is made up by a 7 liters oil tank, a variable flow oil pump, a radial pistons hydraulic motor which operates on the front wheel by means of a chain and a flow meter that allows the rider to keep the system under control.
The characteristic feature of the system is the electromagnetic connection of the transmission, driven by a switch located on the left handlebar. It is possible to ride the bike using rear traction, front traction or both together. When connected, front wheel syncronizes its speed with the rear wheel, no matter the engaged gear. Front wheel is equipped with an unidirectional bearing that allows the wheel to spin when the hydraulic motor is not engaged. In this condition, with the rear traction working alone, hydraulic motor is in standstill condition and the hydrostatic transmission is disengaged without power absorption from the engine.
RUNNING: (IN MOVIMENTO)
Just switch on the system and the front wheel will start to give traction (no need to be in stop conditions or pulling the clutch). This happens inside: variable flow oil pump couples with bike engine through the magnetic joint and the oil flows from the tank to the hydraulic motor that moves the front wheel. Bike behaviour is pretty good, expecially considering the weight on the front wheel (in the future the system will be located inside the bike). During gear changes, thanks to hydraulic coupling the motor, which delivers a fixed amount of power, continues to deliver it at every rpm of the rear wheel. System automatically disengages above 120KPH.
FRONT TRACTION: (TRAZIONE ANTERIORE)
Another feature of the system is that it's possible to choose only front wheel traction. In neutral, accelerating the engine at about 2000 RPM, bike runs at 45KPH. It is also possible to choose let's say third gear and ride the bike as if it had an automatic gearbox.
Photo courtesy of Catawiki Auction.