genuser

I have a 2014 CRV with K24Z7 engine. I had owned an Accord and several Civics in the distant past that do not have VTC. So, I have been reading on how VTC works.

I also own a Nissan Juke that has it's own VTC. I know depending on the engine load, RPM etc the Juke VTC solenoid is energized on a on-off-on pulse duty cycle. So the cam angle is continuously variable.

My question is this: Is K-series VTC solenoid energized based on on-off-on pulse duty cycle, or does it stay continuously energized when the RPMs cross the threshold until the RPMs fall back again?

If there is online documentation on this specific aspect please provide a link. I read technical material and watched some videos, but this question was not answered.

Appreciate your help.

genuser

I saw this on autozone.com, says VTC solenoid is controlled by ON/OFF pulse duty cycle.

| Repair Guides | Engine Mechanical Components | Variable Camshaft Timing Oil Control Solenoid | AutoZone.com

Can a Honda Tech confirm?

GoodUsername

The VTC portion of i-VTEC is continuously variable, not necessarily in terms of degree of phasing but in time of operation. I know the VTEC solenoid engages the lifters on the secondary lobes of the cam at a given RPM and that it controls valve lift (This is that engagement period everyone talks about like its a nitrous shot or something) The VTC varies the timing of the intake cam by acting on the cam phaser and it does so continuously regardless of engine RPM. It sounds like we've confirmed that it is pulse width modulated but a map of voltage, rpm and degree of cam phase would complete this well.