The new 1.6-liter diesel engine to be offered in the US in the 2018 Equinox (earlier post) is similar to Opel’s 1.6L CDTi Whisper Diesel (earlier post) in Europe, and is derived from a common Italian-German-American medium diesel engine design, according to GM. The first application of the 1.6L CDTi was unveiled in 2013 at the Geneva Motor Show in the Zafira Tourer. (Earlier post.)
Maximum power for the Equinox engine is estimated at 136 hp (101 kW), with 320 N·m torque. The engine has a bore x stroke of 79.7 mm x 80.1 mm and a compression ratio of 16.0:1. Fuel pressure is 2000 bar (29,000 psi).
Built with an aluminum block and head, the engine features a new combustion system (with variable swirl) and is also equipped with a variable displacement oil pump and ECU-controlled piston cooling jets.
A variable-vane turbocharger enables the engine to deliver more power with lower exhaust emissions and no decrease in overall fuel efficiency.
NOx emissions are controlled via a Selective Catalyst Reduction (SCR) after-treatment system that uses urea-based Diesel (Emission) Exhaust Fluid (DEF). Electrically heated lines feed the DEF to the emission system to ensure adequate delivery in cold weather.
The 1.6L for the Equinox also includes GM’s latest diesel particulate filter system. An advanced ceramic-type (silicon carbide) exhaust gas filter is installed behind the oxidizing catalyst in the exhaust system, characterized by hundreds of small, porous tubes blocked at one end. This forces the exhaust gas through the walls of the tubes, trapping particulate matter, which is periodically burned off by the heat of the exhaust.