i-DTEC – Honda’s Next-Generation Clean Diesel Engine

Honda’s development program for its next-generation diesel engine, which uses world-first technology to reduce emissions to a level equal to that of a petrol engine, continues apace. The first phase of the program – compliance with the forthcoming Euro 5 legislation – has already reached fruition, and an example of the new engine i-DTEC which makes its first appearance in next year’s Accord range, is being shown at the Frankfurt Motor Show. Using a combination of the latest injection technology, more efficient exhaust gas recirculation and a diesel particulate filter, the 2.2 liter i-DTEC engine comfortably exceeds the Euro 5 requirements. This achievement has not been at the expense of engine performance, however, and both power and torque levels have been increased and fuel economy improved compared to the current 140 PS unit.

Euro 5 compliance is required for all new type approvals from September 2009 and for all new cars from January 2011. Under the requirements, emissions of particulates from diesel-engined cars are reduced by 80 per cent compared to Euro 4 (down from 25 to 5 mg/km), while NOx levels are cut from 250 to 180 mg/km.