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bwilson4web · 01-24-2010, 02:08 PM

Hi,

I've never found more than an 11% improvement in mileage using a reproducible Pulse and Glide (PnG), cruise control based procedure. This technique is based upon using the cruise control, resume speed function, to give a consistent acceleration. Glide is handled by shifting into "N". Sad to say, PnG is usually described with imprecise, manual processes without high-resolution engineering data.

I've found and ordered instrumentation to gather engineering data:

This unit has a high resolution, 320 Hz, sampling interval and built-in, rechargeable battery. They also have a more affordable unit.

This unit has a sampling rate of 160 Hz and uses a removable battery. This is the unit I'll "loan" to those interested in sharing engineering data about vehicle handling. For example, mileage runs could use these to document the driving profile. Combined with a GPS log, complete ephemeris data would be available for post event analysis. Together, these will finally give us engineering units.

Bob Wilson

01-24-2010, 02:08 PM	#1 (permalink)
bwilson4web Engineering first Join Date: Mar 2009 Location: Huntsville, AL Posts: 843 17 i3-REx - '14 BMW i3-REx Last 3: 45.67 mpg (US) Blue Bob's - '19 Tesla Std Rng Plus Thanks: 94 Thanked 248 Times in 157 Posts	Engineering units for Pulse and Glide Hi, I've never found more than an 11% improvement in mileage using a reproducible Pulse and Glide (PnG), cruise control based procedure. This technique is based upon using the cruise control, resume speed function, to give a consistent acceleration. Glide is handled by shifting into "N". Sad to say, PnG is usually described with imprecise, manual processes without high-resolution engineering data. I've found and ordered instrumentation to gather engineering data: This unit has a high resolution, 320 Hz, sampling interval and built-in, rechargeable battery. They also have a more affordable unit. This unit has a sampling rate of 160 Hz and uses a removable battery. This is the unit I'll "loan" to those interested in sharing engineering data about vehicle handling. For example, mileage runs could use these to document the driving profile. Combined with a GPS log, complete ephemeris data would be available for post event analysis. Together, these will finally give us engineering units. Bob Wilson __________________ 2019 Tesla Model 3 Std. Range Plus - 215 mi EV 2017 BMW i3-REx - 106 mi EV, 88 mi mid-grade Retired engineer, Huntsville, AL