Tenneco Inc announced that it has become a global diesel emission control system integration supplier to Caterpillar Inc., the world's leading manufacturer of construction and mining equipment, and diesel engines. In this role, Tenneco will work with Caterpillar to develop and produce diesel engine aftertreatment systems for Caterpillar engines. These aftertreatment systems, along with Caterpillar’s leading engine emissions reduction technology, will be used globally to meet stricter diesel emissions regulations that phase in beginning early in the next decade.