Coast to Decelerate

As a driver, you often need to apply your brakes to bring your vehicle to a complete stop. However, by anticipating traffic slowdowns as early as possible, you can decrease your speed, conserve fuel and save money by simply taking your foot off the accelerator.

Today, most vehicles are equipped with fuel-injection systems that automatically shut off the flow of fuel to the engine when the accelerator is fully released. In this mode, the decelerating vehicle can be thought of as coasting and using no fuel. When the engine speed drops to idle, the injection system restarts the flow of fuel to ensure that the engine doesn’t stall.

 

Coasting to decelerate also reduces wear and tear on your tires and brakes, which in turn reduces your maintenance, repair, and servicing costs.

 

Transcript

[Info4yourLife theme music]

[Quick cuts gas pump, exhaust from vehicle, worn tires or person changing tires]

[Cars on road]

Narrator:

"Rising gas prices, greenhouse gas emissions, wear and tear on your vehicle – whatever your reason for wanting to drive more efficiently there are simple changes you can make that will benefit both your wallet and the environment."

[Car on road close up of foot coming off the gas pedal]

Narrator:

"Coasting to decelerate is an easy technique that will help to reduce your fuel use as well as the wear and tear on your vehicle’s tires and brakes, resulting in lower maintenance costs and fuel consumption."

[Car driving – coming up to red light/stop sign]

[Close-up of foot coming off gas pedal]

[Images of fuel injection system?]

Narrator:

"Removing your foot from the accelerator as early as possible and allowing the vehicle to decelerate by coasting, rather than braking, is a good fuel-saving technique.

Most modern vehicles are equipped with fuel injection systems that cut off the flow of fuel to the engine within a rpm range when the accelerator is released.

In other words, when you take your foot off the gas, you are getting a free ride since no fuel is being delivered to the engine cylinders."

[Split screen – aerial view of animated street grid – 2 cars each a different colour, turns into video]

Narrator:

"To demonstrate the grey car will use hard breaking and the blue car will coast to decelerate."

[Split screen of two different cars driving along the same path – one uses hard breaking and the other coasts to decelerate]

[Fuel consumption gauge to demonstrate savings]

Narrator:

"A fuel consumption gauge connected to the blue car shows that when the driver releases her foot from the gas and coasts to decelerate, the LHK or litres per 100 km and the LPH, or litres per hour, both drop to zero. The grey car continues using gas during this time as the driver leaves her foot on the gas until breaking is necessary."

[B-roll cars on road]

Narrator:

"If all drivers in Canada practiced fuel efficient driving we could prevent 6 million tonnes of carbon dioxide from entering the atmosphere, save 2.6 billion litres of fuel and approximately $2.6 billion in fuel costs."

[Super Graphic:
For more fuel efficient driving tips visit
www.vehicles.nrcan.gc.ca]