Road2

Vehicle:

General

Vehicle weight:		lbs
Drag area:
Crosswind drag penalty:
Wiper drag penalty:		%
Max regulated speed:		mph
# of front wheels:
# of rear wheels:
Parasitic losses:		W

Pack (misc)

Min operating voltage:		V
Max operating voltage:		V
Max pack current:		A
Heat transfer rate:		J/°C
Heat capacity:		J/°C
Drivetrain heat percent:		%
Min pack temperature:		°F
Pack heater power:		W
Pack heater COP:		W
Max pack temperature:		°F
Pack cooling power:		W
Pack cooling COP:		W

Wheels

Front:

Rear:

Rolling coefficient:

front

rear

Tire pressure:

psi front

psi rear

Load rating:

lbs front

lbs rear

Coeff of static friction:

front

rear

Weight at front:

Accel skid:
%

Rest skid:
%

Decel skid:
%

Wheels driven:

Whether the front wheels are driven by the motor.

Whether the rear wheels are driven by the motor.

Accessories

Heating power:

ΔT=-75°F
W

ΔT=-50°F
W

ΔT=-25°F
W

Cooling power:

ΔT=15°F
W

ΔT=30°F
W

ΔT=45°F
W

Stereo:

Quiet: W

Loud: W

Headlights:

Low beams: W

High beams: W

Interior lights:

Solar panel rating:

Wipers (full power):

Drivetrain

The simulator needs to know how much current the drivetrain (inverter + motor) is going to try to draw under various conditions (combinations of torque, voltage, and RPM). Fill out as many "torque,RPM,voltage,efficiency" entries as you can. The simulator will interpolate between whatever points you enter. Use negative torques and currents to indicate regen. Watch your units; torque is newton-meters, not foot pounds. You should have at least 20 entries, and optimally, around 100 covering all possible conditions. Group your voltages in layers – i.e., have a number of entries for 100V, 125V, 150V, etc rather than 100, 101V, 102V, 103V, 104V, etc.

A simple efficiency stat can't fully describe the current the motor draws under various conditions. For example, a motor at 0 RPM but high torque may still be pulling a relevant amount of power. This allows you to account for those power draws. Fill them out like above, in the form torque,rpm,voltage,power

Transmission

Fill out as many "speed,RPM" entries as you see fit. Speeds are in miles per hour. Fill them out in order. This is designed to (roughly) let vehicles with a transmission be simulated. Wherever there would (roughly) be a shifting of gears, place your points close together, such as "49.999999,4000" and "50.0,2000". If your vehicle only has a fixed drive ratio, you only need two entries: "0,0" and the RPM at any other speed (the rest will be interpolated).

Losses

A portion of the energy a vehicle is wasted to the gearbox, bearings, etc. The amount wasted depends on the current operating conditions. Fill out "rpm,vehicle-torque,drag-torque" entries covering the whole range of possible drivetrain conditions. Both torque and drag-torque are in newton-meters. Be sure to include negative torques. Drag should always be positive.

Voltage

The voltage a battery pack provides varies with temperature and with how much charge is left. Fill out as many "wear,temperature,kwh remaining,voltage" entries as you can. Temperatures are in Fahrenheit. For wear, 0.0 is new and 1.0 is the nominal end-of-life (typically 80% range); include excessive wear cases. Remaining kwh is amount remaining in the pack, not the amount that the vehicle can actually use (that is limited by the cutoff voltage). Group by wear. The simulator will interpolate between your datapoints.

Efficiency

Some battery chemistries, such as lead-acid, suffer a significant drop in efficiency with increasing current, causing you to get less range out of a pack when you use it quickly. Fill out as many "wear,amps,temperature,efficiency" entries for the battery pack as you can. Efficiencies are in percentage form (0-100) and everything else is like above – for example, "86.0,1.0,90.0,93.0" means at 86 amps, nominal end of life, and 90°F, it's 93% efficient. Be sure to include efficiencies for negative amps (storage efficiency). Group by wear. The simulator will interpolate between your datapoints.

Road2™
©2009 Celadon Applications

About:
Road2™ is a program that simulates the travel of an electric vehicle of your choosing along a route of your choosing so that you may determine how far you can make it on a charge. It provides feedback in the form of a wide variety of graphs, a color-coded trace of your path, and a charge gauge that shows your charge level at different points (blue-green is nearly full, red is nearly dead, and black means you ran out of charge). Potential charging locations are displayed along the route, along with information about them and comment fields.

Usage:
To choose a route, type it in the box in the lower left hand corner and hit "Find Route". You can drag the endpoints of your route to different locations if you so choose. Before you calculate, you can customize your driving conditions and driving style in the "Conditions" tab. When you're ready, click "Calculate" and watch it run.

For inquiries (support, technical, commercial, etc), email inquiries@celadonapps.com.

Waypoint data credit: Geonames.org

Initial charge:		%
Payload weight:		lbs
Road quality:
Target city speed relative to speed limit:
Target highway speed relative to speed limit:
Desired speed:		mph
Aggressiveness:
Front tire inflation pressure:		psi
Rear tire inflation pressure:		psi
Battery pack wear:
Fudge factor:

Climate control target:		°F
Climate control leeway:		°F
Windshield wiper speed:		%

Outdoor temperature:		°F
Initial air pressure:		mb
Solar illumination:		W/m^2
Wind speed:		mph
Wind direction:		°