Stop and Start System Applies HEV Technology to Conventional Gasoline Engines
News about auto manufacturers and drivers alike being hounded by government regulations to reduce air pollution is nothing
![]() |
Stopping and starting an engine thirty times in a row consumes less fuel than letting the motor idle for the equivalent period of time. (Photo: Citroen) |
It is a well known fact that stopping and starting an engine thirty times in a row consumes less fuel than letting the motor idle
![]() |
French engineers at PSA Peugeot-Citroen decided that they'd do something about all the fuel that's wasted while idling. (Photo: Citroen) |
Now, with direct injection and variable displacement motors featuring active-cylinder shutoff to reduce fuel consumption at low loads, emissions have improved further, however these systems don't often deliver the reported fuel economy benefits due to traffic-clogged roadways. The amount of fuel consumed when waiting at red lights or while stuck in bumper to bumper rush hour is mind boggling, so much so that the French engineers at PSA Peugeot-Citroen decided that they'd do something about it.