Land Rover Freelander 2 TD4 e, 2009
The new Land Rover Freelander 2 TD4_e is Land Rover's most fuel-efficient vehicle to date. Featuring a new intelligent Stop/Start system, it is the first production vehicle to incorporate technologies from the company's programme of sustainable engineering initiatives, collectively named 'e_TERRAIN TECHNOLOGIES'.
On the standard EU4 cycle, the CO2 emissions of the Land Rover Freelander 2 TD4_e are reduced by 8 per cent, compared with the outgoing manual diesel Land Rover Freelander 2. Moreover, in additional tests, Land Rover engineers have measured fuel savings approaching 20 per cent in heavy urban traffic.
The 8 per cent improvement equates to a CO2 emissions reduction of 15 g/km compared with the standard Freelander 2 TD4 manual (from 194 g/km to 179 g/km). In terms of fuel efficiency, consumption is reduced from 7.5 l/100 km to 6.8 l/100 km, a saving of 0.7 litres of fuel every 100 km (62 miles).
These gains, coupled with the added benefits of the gearshift indicator light, software developments and efficiencies from low-rolling-resistance tyres, make the Land Rover Freelander 2 TD4_e the most fuel-efficient production Land Rover ever built.
Phil Popham, Land Rover's managing director, said: "The Stop/Start Freelander 2 is the first production vehicle to benefit from the massive £700 million investment in sustainable technologies by Jaguar and Land Rover. From mid-2009, the Stop/Start feature will be included as standard on all Land Rover Freelander 2 TD4 manual models, with no associated increase in list prices."
Land Rover's new Stop/Start system improves fuel efficiency in urban and stop-start driving. The vehicle automatically shuts down the engine in appropriate conditions, resulting in zero tailpipe emissions and saving fuel that would otherwise be used idling the engine when stationary. When the driver is ready to move off, the engine instantly re-starts.
Sophisticated controls ensure that the Stop/Start system does not compromise the needs of either the driver or the vehicle. For the engine to shut down, the vehicle must be stationary, the gearbox in neutral and the clutch pedal raised. To re-start, the driver simply depresses the clutch and the enhanced starter motor engages the engine, ready for when first gear is selected.
The Stop-Start system is automatically activated each time the ignition is turned on, although there is a switch on the fascia to disable the system, if the driver so desires.
Added fuel economy benefits
Along with the intelligent Stop/Start system, the Land Rover Freelander 2 TD4_e includes a series of additional enhancements that help to deliver fuel economy and CO2 benefits.
A new gearshift indicator light in the instrument pack advises the driver when to change gear if a higher gear will allow the vehicle to operate more fuel-efficiently. This is calculated by the Land Rover Freelander 2 TD4_e's fully mapped engine.
Software developments to the driveline systems on the Land Rover Freelander 2 TD4_e generate CO2 benefits without reducing Land Rover's renowned capability.
Land Rover engineers are also collaborating with tyre suppliers to drive improvements to fuel economy through reduced rolling losses. Tyre characteristics including rolling resistance are optimised for the entire range of available tyre sizes on Freelander 2 models.
Refined Stop/Start operation
Land Rover engineers have invested considerable effort in safeguarding levels of engine refinement. To reduce the engine shake associated with some diesel engines when stopping, the Land Rover Freelander 2 TD4_e features controlled throttle closing and ramps down fuel in a smooth fashion, while the alternator is also turned off during the shut-down procedure, reducing load on the engine. A software feature change and revised engine calibration further aid smooth shut-off, while engine shake on start-up is reduced by the Freelander 2's optimised engine-mounting strategy and inherent tuning.
Uncompromised durability
The increased frequency of stop-start cycles over the lifetime of the Land Rover Freelander 2 TD4_e will lead to increased use of the vehicle's affected components, so enhanced durability of these components was a priority for the Freelander 2's engineering team. They developed a new heavy-duty starter motor, a new ring gear, a new dual mass flywheel friction control plate and an absorption glass mat battery. These new features ensure that the Land Rover Freelander 2 TD4_e delivers characteristic Land Rover all-terrain performance and that the system's operation is always rapid and reliable.
Enhanced starter motor
The more frequent stop and start activity means that demands on the starter motor are forecast to increase up to threefold during the lifetime of the Land Rover Freelander 2 TD4_e. To accommodate the durability demands on the vehicle's 2 kW starter motor, a number of changes have been made.
The grease seals have been enhanced significantly and new hard-wearing copper contact material has been sourced and specified across the TD4_e range to enhance wear resistance within the starter solenoid.
New ring gear
An all-new ring gear is specified for all TD4_e models to cope with the increased frequency of starts. The ring gear is attached to the engine flywheel and comes into contact with the starter motor each time the engine is started. The new ring gear is manufactured from a harder grade of steel and contains over 25 per cent more carbon to improve durability.
Dual mass flywheel friction plate
Diesel-powered Freelanders with manual gearboxes have always featured a dual mass flywheel to ensure engine refinement at start, stop and low speeds. A new Polyetheretherketone friction control plate has been developed for the Land Rover Freelander TD4_e. This is able to withstand seven times the pressure of the outgoing plate, to ensure greater levels of refinement under even greater start and stop demands.
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