"Central to Ford's brand DNA
is its leadership in vehicle dynamics and we set out to apply the
same criteria used for our passenger cars to the new Transit. We
want all Ford vehicles to be recognised for their fun to drive
capability."
John Reed, Vehicle Engineering Manager
The words ride and handling and
commercial vehicle are not ones you usually see in the same
sentence, but Ford engineers are confident that the new Transit will
herald a step change in how commercial vehicles will perform on the
road and be perceived by their operators.
From the beginning of the programme
it was realised that drivers wanted Transit to display vehicle
responses closer to those of passenger cars, whilst still retaining
its tough reputation and load carrying cabability.
The fact that the Ford Transit comes
in front and rear wheel drive, four wheelbase configurations and a
myriad of body styles added considerably to the complexity of the
programme.
Furthermore, developing the system
for a commercial vehicle is far more challenging than identical
technologies used on a passenger car as there is a far wider range
of load conditions, from an empty vehicle with just the driver on
board in an urban environment to a fully laden one at speed on the
motorway. These extremes and everything in between had to be taken
into account.
To achieve consistent dynamic
behaviour across the model range, the Transit team used a variety of
models that reflected the most extreme loading conditions in both
front and rear wheel drive configurations and all four wheelbase
lengths.
In addition, the team also saw the
development of the new Transit as an opportunity to introduce in
combination: disc brakes front and rear, ABS, Electronic Brake force
Distribution (EBD) and Roll Over Mitigation (ROM).
The basic suspension layout remains
unchanged from the outgoing model with MacPherson strut front
suspension and a Hotchkiss rear axle. Within that, though, there are
a number of detailed, but significant changes:
- High degree of commonality between
front-wheel and rear-wheel-drive suspension in terms of
configuration with common cross member, steering gear,
suspension arms, knuckle, hub, shock absorbers, spring and
suspension top mount. Only differences are springs, shock
absorbers and bushings tuned for different payloads and
configurations, e.g. buses
- Same pick up points retained but
reinforced. MacPherson strut top mounts moved up 30mm for
improved reinforcement in that area, resulting in reduced NVH,
better control and reduced friction
- Front anti-roll bar relocated to
the MacPherson struts, as on passenger cars, improves initial
steering response
- Minimising friction in the front
suspension and steering gear has resulted in sportier, more
responsive steering at high speed without increasing effort when
manoeuvring
- New, quicker steering ratio
(16.6:1) for most models improves feel and response. Short and
medium wheelbase chassis cab versions retain 19:1 ratio
- Rear springs mounted on wider
shackles and brackets and increased bush size significantly
improves lateral compliance
New Brakes
By using a CANbus system for the
first time with ABS, the Transit team were able to develop a suite
of electronically-controlled braking and dynamic systems that
significantly improve the Transit's safety envelope.
The new Transit now features
ventilated front discs (300mm on all rear-wheel-drive and two-tonne
models, 280mm on one-tonne/front-wheel-drive models) with post vents
for increased thermal capacity to reduce fading and graunch under
heavy braking. Solid discs are fitted at the rear.
New twin piston callipers are fitted
at the front, single piston callipers at the rear. All pads have
wear sensors. A 9 and 10-inch tandem booster system now increases
assist by 20 per cent. Tuned and optimised for pedal feel, customers
will feel the benefit of this most when the vehicle is fully laden.
The Transit handles superbly even without the extra safety systems
now fitted to it; the extra enhancements serve to make it even
better.
Anti-lock Brake Systems (ABS)
The increased braking efficiency is
further improved with ABS. Speed sensors on each wheel detect if it
is locking under braking and modulate brake pressure to prevent the
tyres from skidding and the driver losing control of the vehicle.
ABS also enhances braking on split surfaces, redistributing brake
torque to whichever wheel(s) has the optimum traction.
Electronic Brakeforce
Distribution (EBD)
Electronic Brakeforce Distribution
ensures the optimal braking force balance between the front and rear
wheels depending on driving conditions and load. If the rear wheels
slow quicker than the front under braking, this can cause a break in
traction and, in extreme instances, put the vehicle into a spin.
More braking force can be applied to
a laden vehicle as the additional weight at the rear improves grip,
but the same braking force applied to an empty vehicle could cause
the vehicle to skid or spin. Ford's new EBD system now automatically
senses the braking force and modulates it to compensate for vehicle
loading.
Brake Traction Control System
(BTCS)
BTCS continues to be available on
Transit as an option and is particularly useful on those vehicles
that encounter a wide range of slippery surfaces where traction
might be problematic – which is generally the case around
construction sites. Ford's BTCS-system comes into effect as soon as
wheel slip is detected, using the brake to slow the wheel until it
regains grip. It doesn't throttle back torque from the engine, but
transfers the torque to the wheel with the most grip.
The system only works at speeds up to
40km/h (25mph), and is particularly efficient when one wheel is on a
slippery surface, such as wet grass, and the other is on dry tarmac.
Electronic Stability
Programme (ESP) and Roll Over Mitigation (ROM) available
By combining traction control with
ESP, the Transit team has developed a sophisticated system that can
detect when the vehicle is deviating from the driver's chosen course
and automatically apply the correct amount of power and braking
adjustments to bring it back into line.
Sophisticated yaw sensors and
lightning fast electronic control systems sense the deviation and
react over a high-pressure brake pump system far quicker than any
human to prevent understeer or oversteer.
ESP constantly monitors input from
vehicle speed, steering input and wheel speed. As soon as a
variation from the norm is detected, ESP initiates the relevant
response:
- If the tyres begin to lose
sideways grip when cornering with a potential for under or
oversteer this is instantly detected by the Active Yaw Control (AYC)
sensor that immediately alerts the ESP system to activate brake
intervention and torque reduction to bring the vehicle back into
line. For instance: if the vehicle starts to understeer when
turning left, ESP will apply the left rear brake thus helping to
turn the vehicle into the bend. If the vehicle is oversteering
then ESP will brake the outer wheels to turn the vehicle back
into line
- Roll Over Mitigation (ROM) is
triggered if the Active Yaw Control sensor detects excessive
body roll or lean during tight steady state cornering; the ESP
system intervenes to counteract this by applying the brakes and
torque intervention
- During high speed lane changes,
the ESP system triggers the Roll Movement Intervention (RMI)
programme that uses rapid brake and torque intervention to
prevent the vehicle from toppling on its side
- Hydraulic Brake Assist (HBA) comes
into operation when a fast rate of brake pedal application is
detected, e.g. during an emergency stop, increasing the brake
pressure when insufficient effort is being applied by the
driver. Simultaneously the ABS is activated
- ESP can also automatically
increase brake pressure at any wheel beyond that initiated by
the driver whilst simultaneously limiting engine torque
One of the big challenges facing the
Transit team was to make all these electronic systems work
effectively irrespective of the vehicle's loading condition and
centre of gravity. To achieve this, a Load Adaptive Control (LAC)
was developed. The total load is estimated by calculating the amount
of engine torque required to accelerate the vehicle and is adapted
over a period of time
Full throttle intervention Traction
Control is standard with ESP and gives the driver all the benefits
of full Traction Control as is the case with Ford's passenger cars.
By offering these technologies and
honing the existing suspension settings and components, the new
Transit has matured into a commercial vehicle in which anyone –
from a full-time delivery or long-distance driver to a school
teacher taking pupils out for a day – will feel immediately at
home.
DRIVER COMFORT AND
CONVENIENCE
"The simple truth is that
customer expectations are rising, they want more in their van now
than five years ago. They expect the same comfort and equipment
levels as their car.
"Comfort is a key attribute for all drivers whether they're
long haul truckers who spend hours behind the wheel, delivery
drivers or artisan-owners where the van plays a dual role in their
professional and private lives.
"In the six years since the last Transit was launched, we've
spent a lot of time observing how vans are used and listening to
what customers want. We've distilled all that into this latest model
to make Transit the leader in terms of driver comfort and
convenience. The Professional Pack is just one example of
this."
Peter Fleet, Director Commercial Vehicles – Marketing
Sales and Service
The reality is that nowadays the van
is more than a tool. There's more of an emotional link between the
choice of van and the role it plays in people's lives.
One of the key aspects is the idea of
the van as a second home, where it plays a key role both in the
customer's business and private life. As the business develops these
owners often make trade-offs with their car. As a result the van has
developed a usage pattern that includes journeys traditionally done
by car – for example, taking the children to school, running
around at weekends etc. The vehicle effectively becomes part of the
family fleet.
This family aspect of van usage is
another reason why customers expect the same equipment and safety
levels as their cars. But, as well as that, during the working day
it is both a work place and also a place for the operator to relax
in when not working.
In addition, commercial fleets are
looking more to their drivers for recommendations and validation of
choice.
To ensure that the new Transit meets
customer needs, the design team spent time with operators observing
how they interacted with the vehicle and what type of storage
facilities and other equipment they wanted.
Storage Solutions
The cabin is much improved and now
offers class-leading storage solutions:
- Two large stowage bins in the top
surface of the instrument panel, the driver's with a 12 volt
power point
- A flip over working surface/picnic
table and A4 ring binder stowage
- A large glove box with hanging
rails for A4 files
- Car park/toll ticket holder
- Two two-litre bottle holders
- Two cup holders, a third is
available if the ashtray is deleted
Climate control
To provide maximum levels of comfort,
the new Transit offers several levels of heating and ventilation –
the standard heater system, a heater with recirculation and manual
air-conditioning system (which is also available with a programmable
fuel-fired heater).
The air-conditioning system cooling
performance has been uprated with a new, larger capacity compressor.
Repositioned air vents on the new instrument panel ensure more rapid
demisting of the front screen and side glass.
Trim and colour
There are now four trim options: flat
woven fabric, velour, all-vinyl and, for the first time, leather.
The instrument panel is now two-tone:
the upper surface is a practical dark colour that also helps to
minimise windscreen reflections and the lower area is lighter to
increase the feeling of spaciousness. Floor coverings offered
include lighter coloured carpets for a warmer ambience and rubber
mats depending on body style. In both cases there is a separate,
heavier layer of insulation to further reduce noise, vibration and
harshness.
Seating arrangements remain flexible
with two set-ups for the front seats, five options for the second
row and three variations for the third and subsequent rows.
The front seats themselves are
mounted on new pedestals to reduce the likelihood of collapse during
a crash, thus helping to limit injuries and the seat foams have been
redesigned to improve comfort, especially over long distances.
Steering Wheel
Two new steering wheels are available
on the new Transit. In addition to the standard steering wheel, a
leather-wrapped wheel featuring brushed aluminium spokes and cruise
control switches is available. The leather-wrapped wheel is standard
equipment when cruise control is specified.
Driver Aids
Installed on Transit for the first
time is the latest CANbus electrical architecture that allows fast
communication between the main electronic control modules and
information sharing between different electronic systems. The use of
this technology has allowed the Transit team to develop a range of
new driver-focused technologies, including:
- Cruise control available on the
Transit for the first time, controlled by steering wheel mounted
switches
- Rear parking aid available, using
ultrasonics to sound an alarm to the driver when reversing in
confined spaces
- Heated screens front and rear with
automatic switch off available
- Visibility Pack available;
includes rain sensing wipers with screen-wash drip, auto
headlights and auto rear wipe when in reverse gear
- New instrument cluster with an LCD
display between the speedometer and tachometer
- Built-in alarm clock
- Satellite navigation with
integrated traffic information available; directional arrows in
the centre LCD display and verbal instructions
- Hands-free and Bluetooth telephone
capability available, this also has voice commands for the
navigation and in-car entertainment volume and channel selection
- Tamper proof digital tachograph
with 365 days internal memory and 28 days on individual driver
cards
- Three levels of in-car
entertainment system including six-CD autochanger
Driver comfort
A comfortable driver is going to be
more efficient, relaxed and alert and less prone to making errors.
Ford's Transit team has gone to great lengths to ensure that the new
vehicle is comfortable to drive even in the most demanding
conditions.
The major advance has been a
significant reduction in noise, vibration and harshness (NVH).
Numerous solutions have been adopted to ensure that Transit driver
comfort is even more car-like:
- The new diesel engine range uses
latest common rail injection to reduce noise
- New petrol engine includes a
balancer shaft to improve smoothness
- New engine hydro mounts across the
range
- Foam filled cavities in body
structure reduce attenuation
- Stiffer structure for the
instrument panel
- Heavier sound proofing on the
floor
- Remote, high-mounted gear shifter
isolates inputs from the transmission
- Improved body gaps reduce wind
noise
Easy to Operate
One of the key requests that came
through to the Transit development team was to improve how the
vehicle felt to drive and operate, moving away from the traditional
and heavy "truck" feel to an easier, more car-like
character.
The engineering team achieved this by
applying the same development processes used in the development of
the acclaimed driving environment and dynamics for Ford's passenger
cars.
Careful attention, for example, was
paid to developing steering feel, so that it is evenly weighted and
linear during cornering or at speed on motorways, but doesn't
require excessive effort for low-speed urban driving. The same
criteria have been applied to pedal efforts with special attention
paid to throttle tip-in so the driver gets an immediate, linear
engine response when accelerating away.
Recognising that Transit is often
driven by people who aren't used to driving commercial vehicles on a
regular basis, for example when the vehicle is hired by someone
moving house, or as a mini-bus for an outing, the engineering team
made the clutch effort as predictable and progressive to use as
possible. A dual mass flywheel, as well as careful tuning of the
spring loadings and hydraulics, has helped in this process.
Driving effort is also reduced thanks
to the wide torque bands of the new engine range which ensure the
driver isn't constantly changing gear to maintain speed and
momentum.
For instance, the new 130PS/310Nm
Duratorq TDCi front-wheel-drive engine has 74 per cent of its torque
available at just 1250rpm and the rear-wheel-drive 140PS/375Nm
Duratorq TDCi has 70 per cent maximum torque at 1250rpm.
However, it wasn't just the driver's
interface with the steering, pedals and gear shifter that caught the
attention of the Transit development team. Many of the minor
controls within the cabin and the stalks operating indicators are
derived from cars in the Ford range and retain the same ergonomic
layout. This was done specifically to provide a car-like feel to the
overall Transit driving experience.