City And Highway Traffic Scenarios

Stopped

• The engine will be off unless it needs to be on for reasons other than tractive power (Max A/C, vacuum, catalyst temp, heat, purge, low SOC)

Launching

• At low speed or low power demand, the launch mode will be electric, unless the engine needs to be on for other reasons.
• At moderate speed or high desired power, the engine will come on.

Entering highway or Passing

• At high acceleration demand, the engine power will be boosted with battery power through the traction motor to provide quick V-6 like response.

Cruising

• At light load, the system may operate in parallel, positive split or negative split mode depending on the battery charge.
• At heavy load (due to high speeds, weight, towing or grade), the system will be limited to engine only performance (no battery support).
• Limited regenerative braking will be used.

Exiting Highway

• Provides an opportunity for regenerative braking.

Braking

• At high speed, the engine torque is ramped down, the traction motor regenerates to a limit and the foundation brakes are applied as necessary (at the traction motor or battery regen limits).
• At moderate and low speed, the engine will be turned off.