At the Mondial de l'Automobile here, PSA Peugeot Citroen and Delphi Automotive Systems (NYSE: DPH - news) announced they have signed an innovation agreement to apply non-thermal plasma exhaust aftertreatment (NTP) to future Peugeot Citroen vehicles. The agreement commits PSA Peugeot Citroen and Delphi to developments of technology for future vehicle applications.