Sentences with phrase «rpm cam profile»
The i - VTEC indicator illuminates when the VTEC system shifts from low to high - rpm cam profiles, and the rev - limit indicator's array of six lights illuminate sequentially as engine speed rises.
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Most cars nowadays have some sort of variable cam that allows different profiles for low and high RPM.
In a nutshell (paraphrasing the Wikipedia article), you have two cam profiles, one designed for low - RPM operation and fuel efficiency, the second (taller cam) for performance.
So vtec's switch between two distinct cam profiles which is selected by the ecu depending on the RPM.
In basic form, the single cam lobe and follower / rocker arm of a conventional engine is replaced with a locking multi-part rocker arm and two cam profiles: one optimized for low - RPM stability and fuel efficiency, and the other designed to maximize high - RPM power output.
For low - rpm torque, the solenoid valve is opened near the end of the cam profile, leading to early intake valve closing.
The cam lobe profile selected for engine speeds below 3000 rpm has a duration of 214 degrees and lifts the valves 5.5 mm.
As engine rpm builds past 4800 rpm, the VTEC system transitions to a high - lift, long - duration intake cam profile for superior high - rpm engine power.
As engine rpm builds, VTEC transitions to a high - lift, long - duration cam profile for improved high - rpm engine output.
Above 5,800 rpm, the intake and exhaust valves are operated by high - lift, long - duration cam profiles, for maximum high rpm horsepower.
As engine rpm builds past 5,350 rpm, the i - VTEC system transitions to a high - lift, long - duration intake cam profile for superior high - rpm engine power.
As engine speed builds past 5,000 rpm, the VTEC system transitions to a high - lift, long - duration intake cam profile for superior high - rpm engine power.