Jaguar debuts new 2.2-liter diesel with stop-start system in XF development mule
30 March 2011
Jaguar has unveiled a new 2.2-liter diesel engine, its most efficient yet. The engine is making its debut in the Jaguar XF development mule. Developing 190 PS (189 hp, 141 kW) and 332 lb-ft (450 N·m) of torque, the new engine is capable of returning 52.3 mpg (UK) (43.6 mpg US, 5.4 L/100km) on the combined cycle while emitting 149 g/km of CO2.
The new four-cylinder 16-valve common rail diesel engine displaces 2,179 cc and is installed in a north-south configuration for the first time. The new engine features a water-cooled turbocharger with low-friction pistons, new injectors and a new crankshaft. The new configuration allowed Jaguar engineers to add a new oil pan and new electronic systems affecting the crankshaft to allow the new intelligent Stop-Start system to operate more efficiently.
Intelligent Stop-Start aims to reduce the prolonged time spent in the shutdown and start-up phase usually experienced in such systems. The Jaguar system overcomes this partly through the inclusion of the new crankshaft sensor and fuel rail pressure holding system meaning the engine needs less time to restore drive through an innovative engine restart capability.
Jaguar says this is best demonstrated when approaching a busy roundabout—i.e., in situations where the driver briefly brings the vehicle to a stop only to move off again quickly. In conventional systems the engine needs to shutdown completely before restarting again. The Jaguar system is able to restart the engine while shifting down from as little as 400 rpm, meaning it does not need to come to a stop. Drive is therefore restored more efficiently.
The inclusion of the Stop-Start function is estimated to increase overall fuel efficiency between 5-7%.
Along with a new engine, the development vehicle debuts an advanced eight-speed ZF automatic gearbox, with the seventh and eight ratios effectively acting as overdrive gears. Accelerating to 62 mph takes 8.5 seconds; maximum speed is 140 mph (225 km/h).
Jaguar engineers put particular emphasis on sound deadening around the engine and bulkhead as well as active engine mounts to reduce vibration. The result is a 3dB reduction in cabin noise.
The new powertrain will feature in a future XF production car with specifications and an estimated on-sale date being announced at the New York Auto Show.
This is really good - a Jag XF with 52 mpg (Uk)!
And 0-60 in 8.5 seconds and 149 gms/km.
It should sell very well in Europe where may countries have a CO2 based tax system for cars.
The 3L 6 cylinder is nice, but you really don't need that amount of power (and cost).
For reference, the BMW 502d sells really well in Ireland.
It is by far the biggest setting model.
Posted by: mahonj | 02 April 2011 at 06:41 AM
That's good to hear that most of the auto motives are going diesel and now Jaguar is also one of them. I really admired the Jaguar and I must say Jaguar embodies elegance and class and is always keep on changing with the times from good to excellent. Jaguar XF Prices
Posted by: Account Deleted | 24 August 2011 at 04:42 AM