Soot and Spin: Two Plug-in Paradoxes
Plugs and Cars
OCTOBER 27, 2007
Paradox 1 - Soot: There's an apparent emissions paradox with plug-in hybrids (PHEV): Driving longer distances on battery power means more cold starts as the internal combustion engine (ICE) stops and starts up again after the batteries deplete. This catch-22 - you need the polluting engine running to keep the emissions mitigation running - has regulators including the California Air Resources Board (ARB) frowning upon PHEV conversions.