Two wheels machine kind
In two wheels of BMWs, it is features that there are a lot of examples of adopting a mechanism different from the other two wheels. Especially, there are a lot of one to adopt two horizontal opposing cylinder engine and either a dry single board clutch and shaft drive or this.
* Length is put and two horizontal opposing cylinder engine.
It was adopted for "R32" first in 1923. The length putting layout to which the cylinder projects right and left is taken, and a basic layout to the drive shaft is alive and well as it is in R series today through the clutch and the transmission.
* Shaft drive
All cars that exclude the F&G series are the shaft drive models in BMWs though being equipped only by partially two wheel car in a Japanese car because the tail lift when starting is disliked. It is an advantage that it is almost maintenance free compared with the chain drive, and there is no power loss by sliding of the chain.
* Dry single board clutch
This method that the engine clutch and the changing the speed machine can be thinned more than a general multiplate wet clutch to queue up in length in the putting the length of the engine layout is adopted. (The multiplate wet clutch is adopted it is necessary to reduce the diameter to thickness in the K series of an engine horizontal putting instead of being able to do room. )
It is ardent to the adoption of the new departure, and adopts the following technologies for a car
on the market one after another in advance of another manufacturer in recent years.
* Pararebarriasaspention
Suspension developed to suppress tail lift when starting becoming problem in shaft drive being adopted first with R100GS in 1987. Naming is done by the synthesis of "Parallel" and "Lever".
Middle..winding..point..have..swing..arm ..arm..compose..link mechanics..rear wheel..actually..long..swing..arm..maint ain..tracks..draw..vertical motion.
* Tererebarfrontosaspention
It the first adopts it with R1100RS put on the market in 1993. Naming is done by the synthesis of "Telescopic" and "Lever".
Handling changes by the two-wheeled vehicle in a general telescopic fork reception desk suspension so that the caster angle may change along with the stroke, too. Moreover, the steer stability becomes small as the caster angle after it sinks greatly at the sudden deceleration and the buffer stroke is insufficient stands. Under such a condition, extremely dangerous phenomena such as the steering wheel's the front wheel's splashing when a strong pushing up is received from the road and swinging are generated. It is a thing developed to avoid this.
There is an evaluation of transferring it from the little movement of the front wheel forward when the suspension shrinks while excelled in the control stability compared with a telescopic expression by one step in a super-high-speed buffer ability, too. Moreover, it is difficult on the structure to enlarge the stroke.
By the way, it is BMWs to have adopted the telescopic expression reception desk suspension for the two-wheeled vehicle of mass-producing on the market first in the world. (R12,1935)
R series(two horizontal opposing cylinder engine)
R is taking of the initial of Rad (wheel and bicycle). The camshaft is on the side of the cylinder, and the valve can be classified there into drive and high cam OHV by a short push rod. The ground amount of the cylinder is higher than that of old R series.
