The new patent of suzuki of a small twin-cylinder engine with variable valve timing has the objective of achieving a more compact mechanics and, in addition, reducing wear. Essentially, it follows the same principle as VVA motors. yamaha.
Variable valve timing systems have been a slow starter in the motorcycle world, but their popularity has grown exponentially in recent years. Brands like bmw and KTM have embraced this technology, thus defying the incipient rumors about the decline of the internal combustion engine. Furthermore, the constant improvement year after year shows that this type of engine still has a lot to offer.
Now it seems that suzuki joins this trend with a new small-capacity VVT twin-cylinder engine, as suggested by patent applications showing its design.
It is important to mention that suzuki already has experience in variable valve timing systems in motorcycles. The most recent design of the GSX-R1000 of the company, introduced in 2017, uses a fully mechanical cam timing system. This system relies on centrifugal force to alter valve timing as engine revolutions increase.
This technology was initially designed to comply with MotoGP rules that prohibit the use of electronic and hydraulic VVT. Of course, this system has proven itself both on the track and on the road.
In addition, other patents have been seen that suggest that suzuki is exploring a more conventional hydraulic cam timing system for future versions of the Hayabusa. Technology very similar to that which has already been adopted by factories such as Ducati.
But conventional VVT systems only alter valve timing, while more advanced ones also modify valve lift and duration by switching between different cam profiles. This cutting-edge technology has been implemented in high-end models from brands such as bmw and KTM.
At the lower end of the market, we have also seen variable timing and lift systems, such as Yamaha's VVA system used on models such as the MT-125 and the YZF-R125. This type of technology, designed for SOHC engines, uses two-part rocker arms to operate the intake valves, and it is precisely this design that Suzuki is working on for its new small-capacity parallel 2-cylinder.
This is Suzuki's twin-cylinder engine with variable valve timing
The concept has already been tested in production. The single camshaft has three lobes for each cylinder, one exhaust and two different intake. The intake lobes have different elevation and duration profiles. The VVT system is based on a two-part intake valve rocker arm, controlled by a metal pin that is activated by oil pressure, thus allowing switching between cam lobes as needed.
This patent demonstrates the commitment of suzuki with the development of variable valve timing and lift systems, especially in the context of its 248cc parallel twin engine. Although the basic engine design remains the same, the addition of the variable valve system represents a significant evolution.
This same engine design is also found in 298 cc models manufactured by the Chinese company associated with suzuki, Haojue. However, these models are not available in Europe due to strict emissions regulations.
