Ford 2009 Escape Hybrid Owner's Manual page 8

Introduction
If the vehicle is left inoperative for over 31 days, it may be necessary to
jumpstart the vehicle. For more information, refer to Jump starting
your (Low voltage [underhood] battery only) in the Roadside
Emergencies chapter and also refer to Low and high voltage battery —
storage in the Maintenance and Specifications chapter.
Engine: The engine speed in your hybrid is not directly tied to your
vehicle speed. Your vehicle's engine and transmission are designed to
deliver the power you need at the most efficient engine speed. During
heavy accelerations, your hybrid may reach high engine speeds (up to
6000 RPM). This is characteristic of the Atkinson cycle engine
technology helping to maximize your hybrid's fuel economy.
In prolonged mountainous driving, you may see the engine tachometer
changing without your input. This is intentional and maintains the
battery charge level. You may also notice during extended downhill
driving that your engine continues to run instead of shutting off.
During this "engine braking", the engine stays on, but it's not using any
fuel. You may also hear a slight whine or whistle when operating your
vehicle. This is the normal operation of the electric generator in the
hybrid system.
During certain events (such as vehicle servicing) your low voltage
(underhood) battery may become disconnected or disabled. When this
occurs, and after reconnecting the low voltage (underhood) battery and
driving the vehicle, the engine may continue to operate for 3-5 seconds
after the key is turned to the off position. This is a normal condition, as
the vehicle's computers are relearning the operating characteristics of
your particular engine in order to operate it at maximum efficiency.
Braking: Your hybrid is equipped with standard hydraulic braking and
regenerative braking. Regenerative braking is performed by your
transmission and it captures brake energy and stores it in your high
voltage battery.
Driving to optimize fuel economy
Your fuel economy should improve throughout your hybrid's break-in
period. As with any vehicle, fuel economy can be significantly impacted
by your driving habits and accessory usage. For best results, keep in
mind these tips:
Tire Inflation: Keep tires properly inflated and only use recommended
size.
Climate Control: Your hybrid is equipped with an "ECON" button that
offers a more fuel efficient operation of your automatic temperature
control system.
8
2009 Escape Hybrid (ehv)
Owners Guide, 2nd Printing
USA (fus)