Clean Diesel Technologies Inc. announced that platinum group metals industry veteran and current member of the Board of Directors, Charles R. Engles, Ph.D., has been appointed Chairman of CDTi's Board of Directors, effective September 29, 2014. Dr. Engles, age 66, was appointed upon the resignation of longtime Chairman Alexander "Hap" Ellis III, who resigned to focus more time on the venture capital firm of which he is a partner.