DAWN customers are using the CAN bus for hybrid electric vehicle (HEV) testing for virtually all hybrid vehicles including the Toyota Prius, Camry, Honda Civic, Ford Escape and various hybrid trucks. Hybrid testing includes plug-in hybrids (PHEVs), hydraulic hybrids, and hydrogen hybrid vehicles.

Since HEVs incorporate new technology and have a need for greater in-vehicle network capabilities, they have been the leaders in utilizing the CAN bus. HEM Data uses a Prius as one of our test vehicles for the development of DAWN.

Below are representative data that you can acquire with the CAN bus on hybrids. Many users of DAWN are testing hybrid vehicles including the Department of Energy (NREL + INL), US Army, State of Vermont, and Cork Institute of Technology.

Notice how the motor torque (green) mirrors the regen braking (yellow).
Generator speed (dark red) is generally proportional to engine RPM (red).

Important hybrid parameters include:

• State of Charge
• Motor and Generator Speed
• Motor and Generator Torque
• Regenerative Brake Torque
• Vehicle Speed
• Target and Actual Engine Speed
• Power Resource
• Current and Voltage

DAWN provides several display option for hybrid data including the ability to overplot up to 64 parameters to see how they inter-relate with up to 10 Y-axes to show various ranges. Up to 100 plots could be on one Display page and you have the option to configure 8 Display Pages.

You can also mix plots with other types of displays such as meters and indicators.