Volvo Hybrid KERS system

Volvo breakthrough boosts fuel efficiency 25 percent

The technology Volvo is testing for passenger cars has worked in race cars and now the group says it can make it affordable. Here is how they do it.

Volvo has been testing a mechanical hybrid system it claims will reduce fuel consumption by up to 25% for a given performance point. The performance benchmark that Volvo is using is a six-cylinder turbo engine. From that point, Volvo is then claiming it has a system in development that will use a four-cylinder turbo engine and a mechanical hybrid system that will meet the performance target, yet use 25% less fuel.

In essence, Volvo has adopted the base technology widely used already in prototype, supercars, and racing cars commonly referred to as a flywheel-kinetic energy recovery system, or KERS. KERS is a term that can apply to any system that recovers energy from a car during braking. What is unusual about Volvo’s new system is the flywheel. A flywheel is simply a spinning mass that can store energy simply through its rotational momentum. When the energy recovery is wanted for powering the car that rotational energy can be tapped via a mechanical (transmission) system. In the mechanical system the flywheel takes the role of the battery in a more conventional hybrid, battery storage system.


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This looks like exactly the same system that was tried and failed in Formula 1 and that Porsche is testing in GT.
It seems to be. Whenever someone uses "Carbon fiber" and affordable in the same paragraph I get a bit cynical.