The new V6 CRD engine was co-developed with VM Motori and Fiat Powertrain and in the Jeep application delivers 177kW of power at 4000rpm and 550Nïm peak torque between 1800 and 2800rpm. This is 10 per cent more power and eight per cent more torque than the MB engine it replaces. Replacing the Mercedes-Benz TDV6 of the same capacity that was previously used in the WH Grand Cherokee and Chrysler 300C, the new engine will be available accross the new WK range including Laredo, Limited and Overland models. The new engine will also appear in the next Chrysler 300C due here early next year.
VM Motori have manufactured diesel engines for Chrysler for many years and their 2.8L Turbo Diesels are currently used in the current KK Cherokee, JK Wrangler and Chrysler Grand Voyager models.
Putting out vastly improved power and torque, and a huge 19 per cent improvement in fuel consumption to just 10.3 L/100 km on the urban cycle and 7.2 L/100 km on the extra-urban cycle. For the combined cycle, the fuel economy is rated at 8.3 L/100 km. The new model engine will be very popular with buyers looking for the efficency and power of a diesel for towing and long distance touring in the Jeep Grand Cherokee
The engine is designed to run on EN590 ultra-low-sulfur diesel fuel.
For this engine, cast-iron exhaust manifolds are utilized. Additional emissions controls include a close-coupled diesel oxidation catalyst and standard diesel particulate filter. Euro 5 emissions are met through an exhaust-gas recirculation (EGR) system that includes an EGR valve with DC motor and a high-performance EGR cooler with bypass valve.
CO2 emissions are reduced to 270 g/km for the urban cycle and 188 g/km for the extra-urban cycle. Combined-cycle CO2 emissions are now 218 g/km.
These are the Euro ratings - Australian ratings are not yet published.
To achieve this efficiency the V6 uses Fiat’s MultiJet II common-rail fuel-injection technology with 1800-bar injection pressure and new injector nozzles that can inject up to eight times per cycle for more precise, efficient and quieter combustion. A single variable-geometry turbocharger is employed, as is intercooling and cooled exhaust gas recirculation, while an exhaust catalyst and diesel particulate filter are fitted in the exhaust system to further reduce emissions. This all-new compact and lightweight 60-degree ‘V’ engine uses a compacted graphite-iron cylinder block with alloy heads that comprise DOHC and four valves per cylinder. The rigid block features structural stiffening and a re-enforced cast oil pan to reduce noise and harshness from the combustion process. The forged-steel crankshaft is supported by four main bearing journals fitted with four-bolt caps incorporated into the bedplate to further improve rigidity and reduce noise.
Pricing is yet to be finalised but expect the diesel engine option to cost around the same as the Hemi V8, which costs $60,000 in Limited guise - the Laredo should be approximately $5000 more than the Laredo V6 petrol at $45,000. The new Diesel Grand Cherokee's should be arriving around June or July 2011.
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