I guess i *presumed* the cvt went into neutral everytime you let off the throttle. The versa i drove (different software obviously) didn't feel like it engine braked at all.
I also thought the transmission would be capable of 1mph and utilize some kind of clutch for efficiency
Last edited by MightyMirageMpg; 01-18-2017 at 01:08 AM. Reason: proper wording
I know what you mean about engine braking. Our Fusion does this. I think it doesn't do deceleration fuel cut-off - another thing I learned from this forum.
View my fuel log 2015 Mirage ES 1.2 automatic: 40.4 mpg (US) ... 17.2 km/L ... 5.8 L/100 km ... 48.5 mpg (Imp)
A typical CVT lets go of the belt at idle and must engage (grab) it again to start moving. During engagement the belt slips against the sheaves. This slipping causes wear. In a typical CVT with a rubbber composite belt that's easy to change when worn this is an acceptable feature. In automotive CVT's the belt is woven steel. Slippage in this system will cause excessive heat and wear to the point of failure very quickly. to circumvent this the belt is always kept in proper tension in full contact with the sheaves so a torque converter is required to handle the slippage required for idling in gear and progressive engagement (slippage) to get moving again. Without this the CVT is not feasible in automotive applications.
The neutral idle logic technically put the trans in neutral relieving engine load for economy at idle while relieving stress on the torque converter. The latter is necessary as the torque converter is very small for weight savings and can overheat quickly. As stated previously and in the owner's manual, it's a good idea to shift into neutral for prolonged stops at idle.
Last edited by IchabodCrane; 01-18-2017 at 01:42 AM.
Will weld for beer.
View my fuel log 2014 Mirage SE 1.2 automatic: 45.3 mpg (US) ... 19.3 km/L ... 5.2 L/100 km ... 54.5 mpg (Imp)
DAF used to have a CVT with rubber belts in the seventies/eighties for its cars. But I think he meant mopeds, snowmobiles and the like.
I have not found anything in the owners manual that indicates that it recommends shifting to neutral at prolonged stops. Idle logic makes that redundant, so I do not see why it is needed. I will have another look.