Key Players Covered Some of the major companies that are present in reciprocating power-generating engine market are Yanmar, Wartsila, DEUTZ AG, Mitsubishi, Rolls-Royce, Siemens, Escorts Group, MAN Energy Solutions, Ashok Leyland, John Deere, Kohler Power, Caterpillar, Kawasaki Heavy Industries, JCB Inc., Briggs Stratton, Cummins and Kirloskar Oil Engines Limited.