PARIS -- PSA/Peugeot-Citroen SA says it must overcome technical difficulties before it can offer a fuel-saving stop-start system on its popular diesel cars.
So PSA will introduce its proprietary Stop & Start system - a Valeo-made starter-alternator combined with a PSA-designed automated manual transmission - only on gasoline-powered cars. It says the technology can save up to 15 percent fuel in congested traffic.
The system will be on small cars, starting with a Citroen 1.4-liter C3 limited edition in November, followed by the smaller Citroen C2 and sister-brand Peugeot's future 107 small minivan.
A stop-start system cuts off the engine automatically when the car slows to a standstill and restarts it immediately when the driver takes his foot off the brake pedal.
The problem for diesels is a long time lag before the engine restarts.
"There are difficulties in adapting stop-start to diesel, but we shall overcome them," PSA CEO Jean-Martin Folz said.
Fitting diesel cars with a stop-start system would help PSA, whose traditional strength is in diesel vehicles.
In the first seven months of this year PSA sold 900,000 vehicles with diesel engines, or 59 percent of its sales.