Highway MPH/RPM's

On my commute home today I'll run a scatter plot in Torque of Vehicle Speed (x-axis) and Engine RMP (y-axis), then post up the chart later tonight if I have time.

EDIT:Here's the scatter. Unfortunately the highway was a mess so I took side streets home. Lots of noise in there.


Torque scattered plot by bendertj, on Flickr

 

vestigial.....good one.

 

"I'll run a scatter plot in Torque (android app), of Vehicle Speed (x-axis) and Engine RPM (y-axis),"

Hope this helps someone avoid the cognitive dissonance of trying to figure out what "torque of vehicle speed" means.

 

I had a torque of speed on a character I used to play in Dungeons and Dragons. Oh wait that was a Torc.

 

Yeah. Right. A spatter chart...er .. I mean a clatter cart....after 7 years in high school
you'd think I'd have done that already.

Nice, Corwyn. That'll do nicely.

 

Corwyn-
I appreciate the help avoiding any cognitive dissonance.
Whew! Sure was close though.

With no time refernce, I'm guessing for example it shows 35 mph was attained many times with many different rpms each time.
This tells me that there were moments when 35 was attained on level ground with a certain rpm, 35 was attained ascending at a different rpm, and 35 was attained descending at yet another rpm.
That would explain the sensitivity to level ground related to rpm.
The gear ratio is infinite (within certain params ) the speed changes thru rpm.
Am I close?

 

has been,
have you got a SGII yet? If not, may I recommend Torque instead? It is a lot cheaper and more versatile. Only downside is that it's not constantly stuck to your dash every time you get in the car.

 

markabele-
Have not decided on a device yet.
Appreciate the advice.
Understand the reason.
That is an app for Android I think.
I do not have a smart phone.

First of all the people I know to buy a PC and maintain current issues/hardware/software for many-many years.
My first PC cost $3500, that was about ...oh...well whatever.
Believe me, I get it.....but.....
I do not have a smart phone.

 

You might consider doing a total energy study:

• ICE rpm and MG1 torque -> gives the engine power
• Traction volt and current -> gives traction battery power
• GPS velocity and altitude -> gives potential and kinetic energy

With this data, you can calculate the vehicle drag, both aerodynamic and rolling. Add to this roll-down testing and you'll have a second set of metrics and you're well on the way to a Prius dynamic model.

Bob Wilson