Upcoming Pulsar 250 VVA tech could be simpler than R15’s but the resultant output could be similar – a bump in power at a certain higher rpm…
More than a concrete confirmation, it is a belief that Bajaj is readying its 250cc Pulsars. Irrespective of the displacement, it is revealed that these will be the new-generation Pulsars. Launch, as we see it, could happen sometime this year – probably closer or ahead of the festive season.
Now, according to a latest speculation, the Pulsar 250 will come with Variable Valve Actuation or VVA. It is the same technology used on the very popular Yamaha R15.
Let us know more about VVA and its details…
Bajaj Doing a Karizma; Clearest Spy Pic of New Pulsar 250F
Variable Valve Actuation
It is often assumed that VVA helps to provide more initial and mid-range power to the bike. Well, that’s not really true. Normally, in an engine with a single camshaft, both intake and exhaust valves are opened and closed by this camshaft.
This single camshaft consists of two lobes one each for the intake and exhaust valves. For VVA to work, a supported engine process with another auxiliary lobe. This one is usually bigger than the primary lobes of the camshaft.
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It’s quite easy to guess that when after the bike touches a certain RPM limit, the lobe responsible for the intake valve will begin to exhaust.
This is where the auxiliary 3rd lobe will take over the duty of opening and closing the intake valve as it is more powerful. Being the powerful lobe, it can prolong the opening length of the intake valve.
This will, in turn, allow a substantial volume of the air-fuel mixture into the combustion chamber. All this leads to the generation of more power.
Bajaj Doing a Karizma; Clearest Spy Pic of New Pulsar 250F
The above situation happens only when the bike reaches a certain RPM in the higher range, of course. As we talked about R15, we can take its example. In Yamaha R15, the VVA activates at around 7400 RPM. This helps in power delivery while blazing through the tracks.
Similarly, if this report is true, the upcoming Pulsar 250F will have an RPM limit post which for more power generation, the VVA will engage.
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Do the rider gets to know when VVA is enabled in their bikes.? Yes, there is a VVA indicator on the R15, that notifies the rider. If the Pulsar 250F gets VVA, then it may also get such an indicator.
There is another side to this as well which is price. Fusing a new technology that caters to power, will definitely reflect on the price tag. However, what Bajaj could be working on could turn up to be a relatively simpler technology. But this is exciting…
Source: Zigwheels
