Engine Control Systems Limited is now CDTi (formerly Clean Diesel Technologies, Inc.) Engine Control Systems Limited is now CDTi a leader in developing and manufacturing technologies that reduce emissions from on- and off-road engine applications. We are a leading global developer and manufacturer of light-duty gasoline, heavy-duty diesel and alternative fuel emissions control systems and products. Diesel oxidation catalyst and diesel particulate filter products from CDTi have been proven under the most severe conditions, including underground and open pit mining, tunneling, cargo handling, industrial and stationary power generation applications, urban transit, school bus and other on- and off-road fleets. As part of CDTi, we will continue to provide leadership in emissions control and catalyst technology globally deploying advanced technologies that reduce harmful emissions from diesel, gasoline, natural gas, bio-fuel and other combustibles. With operations in several countries, CDTi provides unique perspective on global solutions for emissions reduction. Backed with regulatory approvals from countries around the world, we provide a suite of products that are cost-effective, sustainable and proven successful in both OEM and aftermarket applications.