Peugeot 707

CONTENTS

1) Peugeot 707
1.1 Explanation of the chosen name

2) Concept design elements
2.1 Conception starting points and guides
2.2 Platform
2.3 Design
2.3.1 Outer design
2.3.1.1 Bodywork
2.3.1.2 Windows and visibility
2.3.1.3 Rims
2.3.1.4 Bottom
2.3.1.5 Doors
2.3.2 Interior design

3) Techincal solutions and details
3.1 Dimensions
3.2 Vehicle mass
3.3 Road handling and driving capabilities
3.3.1 Platform
3.3.2 Brakes
3.3.3 Difusor
3.3.4 Flat bottom of the car
3.3.5 Steering wheel
3.4 Drivetrain
3.4.1 Brief introduction
3.4.2 Alternative fuel/energy sources
3.4.3 Engines
3.4.4 Drivetrain combinations
3.4.4.1 Engine combinations
3.4.4.2 Gearboxes
3.4.4.3 Propulsion and energy sources positioning
3.5 Aerodynamics

4) Connection with contest theme (P.L.E.A.S.E.)
4.1 Pleasurable (to drive)
4.2 Lively
4.3 Efficient
4.4 Accessible
4.5 Simple
4.6 Ecological

5) Connection with Peugeot heritage and values and final words
5.1 Heritage and values awareness of the Peugeot brand
5.2 Target market

 

 

 

1) Peugeot 707

1.1 Explanation of the chosen name

Peugeot heritage and one of major instant brand recognition elements is model naming using x0x numbers scheme (where x stands for any nuber from 1 to 9). If someone is talking (and not just about cars) and mentions, for example, 307, 406 or 407, first association is Peugeot, and almost everyone knows instantly that the word is about Peugeot car model.
Respecting this naming convention, this concept is named 707. Why exactly 70x series? There are several reasons: first of all, series 10x, 20x, 30x, 40x, 60x and 80x are already occupied by existing Peugeot models available on market - that leaves as free options 50x, 70x and 90x series (not mentioning four digit combinations such as 1007); Peugeot already presented concept car sporting 90x name series (907), and 50x series are still connected with 50x Peugeot saloon limousines in peoples mind (504) - that kind of brand awareness is something that should be kept and maintained; that leaves us with 70x series, and, most of all - this car looks and feels like 707! If this concept is ever to be built or mass produced and survey about name for it takes place within market research, I'm pretty sure that exactly 707 would be most frequent answer. Furthermore, 70x series stands fresh, and since Peugeot at this moment still lacks hybrid propulsion mass production model, 707 comes in as perfect name for the first hybrid model.
Seven as last of three digits is chosen for actual Peugeot models are x07 generation, and 707 combination sounds great.

 

 

2) Concept design elements

2.1 Conception starting points and guides

Starting points for this concept were and are:
a) complying with contest requests (P.L.E.A.S.E.),
b) cohesion with Peugeot tradition and values,
c) idea to create fully functional car (that can in short time go to production)
d) usage of already existing Peugeot parts and systems such as already developed car platforms, engines, gearboxes, etc. where possible in order to keep developing costs as low as possible without affecting quality in any aspect
e) creating car that will provide great level of road handling and driving characteristics, and, ultimately, a car that lures smile on drivers face.

2.2 Platform

Peugeot 707 concept is based on 307 SW platform with wheelbase measuring 2708mm; 307 SW is chosen in front of regular 307 (2608mm wheelbase) for simple reason that extra 10cm of wheelbase comes in very handy for greater space and comfort available to passengers in this four-seater (especially keeping in mind larger wheels than usual used on this concept), while maintaining not too large dimensions for achieving great driving capabilities of the car. The 307SW platform is chosen also in favour of 407 platform simply because 307 platform with some modifications is enouh for 707, wheelbase is very good and I guess requires lower costs than 407 platform; 607 platform is too large and simply not for this type of car.
So, 307SW platform was the first physical milestone in creating this concept, dictating dimensions and other parameters as well.

2.3 Design

2.3.1 Outer design

2.3.1.1 Bodywork
Outer design represents elegant agresiveness at front an very fluid profile line; I insisted on as short as possible overhangs for keeping center of the vehicle mass as close as possible to the center of car and center of the wheelbase as well (concerning lenght and width), and as low as possible (concerning height of the vechile), and for keeping visual compactness of car.
Car maintains same line stretching from start point of front hood till the very last point of lenght at the end of car – looks very compact and solid. Backdraw of this solution, combined with quite short front overhang, is that there is no enough space for fitting large displacement internal-combustion engines under the front hood. Nevertheless, any engine up to around 2 litres of displacement capacity should fit in without problems, and more than that is not even needed, as will be explained in chapter 3.

Front air intake grill is quite large – reason is visual effect in first place – since the dimensions are such, there is plenty of air available to the engine, passengers space and for cooling purposes (brakes for example).
Front lights look very dynamic and agressive well within limits of good taste, simultaneously respecting Peugeot visual appearance charateristic for all Peugeot models.

Concerning rear end design, two elements needs explanation:
a) first, the diffusor – besides improving stability, holds another functional aspect - this kind of car's rear shape could cause in some circumstances forming unwanted air bubbles dragging behind car and thus unnecessary increasing air resistance causing increased fuel consumption and degrading car performance and handling – this is elegantly solved using unobtrusive diffusor, which, in my humble opinion, also significantly increases attractiveness of the car;
b) second, rear end of body is quite high positioned, and as such can obstruct good drivers vision when driving backwards – the solution is very elegant and comes as key ingredient of the outer design – back door (trunk door) as part of rear end is made of the same glass material as all other windows on car – the glass that is completely transparent for driver and other passengers loking from inside of the car towards outside, and completely non transparent for people outside of the car.

2.3.1.2 Windows and visibility
(Note: also see ad b) above)
Regarding windows, (as can be seen on pictures), there is no classical tin roof – entire roof, front end driver glass and rear glass are made of one single glass piece – the necessary reinforcements are placed inside (non visible from the outside) and are done very discreetly, so they do not obstruct view from passengers cabin in all directions, including sky.

2.3.1.3 Rims
Two guiding ideas were present while creating rims – visual aesthetics and funcionality, as for the entire car as well. Funcional aspect of the rims shaped like propeller is 'blades' positioning at such rotation angle that, when the wheels are spinning, rim propells hot air away from disc brakes towards outside (portion of air is guided from front intake air grill to brakes, cools them down and then the spinning rim heated cooling air pushes away).
Additional significant benefit is gained from this – as the heated air rushes through rims towards outside, it pushes portion of surrouding air around the sides of the car and thus reduces air resistance.
Cooling aspect is more important for front brakes than the rear ones for they are under much more pressure and, additionaly, electric engines are mounted in rear wheels, so, when the car is braking, these engines are taking great deal in braking funcionalty of the rear wheels.
Rear wheels/tyres measure a bit larger diameter than the front ones for two reasons – first, better handling of massive torque delivered to the rear tyres, and, second, visual appearance.

2.3.1.4 Bottom
Perfectly flat bottom of the car (starting from the very first point of car's bottom) is here for good reason – achieveing Venturi effect, which will be explained in chapter 3 also.
Distance from car bottom to the ground is 10 cm, which seems to me like good compromise between everyday usability and driving capabilities, but that can be easily adjusted, increased or decreased if necessary (using hydraulics).

2.3.1.5 Doors
Front doors are to be opened in classical manner by swinging towards front, while the quite short back doors are to be opened by swinging in opposite direction – toward back: this combination provides easy and elegant way of entering the Peugeot 707 passenger cabine.

2.3.2 Interior design

As already said, one of the starting ideas was usage of already existing Peugeot parts and systems; since the 407/407 coupe models interior fully fulfills requirements of 707, I suggest using 407 coupe interior (evermore, interior width is very similar, so there shouldn't be any problems).
The major differences are: seats, which should be thinner thus providing more space for passengers, also a bit shorter wheelbase, which is compensated by shifting of front end of inner cabine towards front, and finally, system of doors opening (back doors opens by swinging in backwards direction).
Various colour combinations of the interior are possible, my first pick would be black plastic parts and Palimbro or Cerbere leather (out of existing combinations), enriched with brushed aluminium or chrome elements.
Passengers should enjoy full view and sight freedom thanks to fully transparent glass roof, with possibility of shading passengers cabine if the sun is too bright or too hot.
Trunk space is not very deep, since drivetrain parts are to be placed beneath it, but it provides very decent lenght and width, wich is more important for usual trunk usage, such as storing traveling bags and groceries.
Spare tyre is discarded, for every cubic centimeter is needed, so smart tyres which allow you to drive even after suffering possible puncture are to be used.

 

 

3) Techincal solutions and details

3.1 Dimensions

Dimensions are as following:
Wheelbase: 2708 mm
Lenght: 4132 mm
Height: 1423 mm
Width (at the widest parts of car body above the center of the wheels/above axels): 1860 mm
Front overhang: 653 mm
Rear overhang: 771 mm

3.2 Vehicle mass

Total vehicle mass, without driver and with empty fuel tanks, including batteries and generators for both electro motors, should be kept below 1400 kg by all means or equal that 1.4 tons mark; +-10kg doesnt make any life important differnce, but when we are talking about kilograms and cars, the less, the merrier; if area of 1200 to some 1250 kg could be achieved without too high costs or safety issues it would be perfect.

3.3 Road handling and driving capabilities

3.3.1 Platform

Peugeot 707 is built on 307SW platform with wheelbase measuring 2708 mm in lenght; however, 707 is wider than 307, so that modification along some other ones should be done. The proportions in terms of relation between width, wheelbase lenght, overall vehicle lenght and vehicle height and quite equal mass distribution on axels are great basis for building up 707 as a car with great dynamic and driving qualities.

3.3.2 Brakes

Same brakes that 407/407 coupe uses can be used on 707 too; however, braking jaws on front discs would be positioned on the inner end of discs (closer to the centre of the vehicle) – may not seem important, but it should even further improve weight distribution and front discs cooling. Also, rear braking jaws are to be positioned in opposite rotation, closer to the vehicle center, too.

3.3.3 Diffusor

Already explained in the outer design section (2.3.1).

3.3.4 Flat bottom of the car

The idea is to achieve Venturi effect under the car in motion – principle is simple – bottom of the car needs to be perfectly flat, so the air that goes beneath car moves faster than the surrounding air thus creating lower pressure field under the car – between the car and the road – resulting with 'sticking' car to the road and by that tremendeously improving in first place stability at high speeds, and also improving handling. The higher velocity of 707, the stronger force of effect. This is used on some racing cars.
This can be achieved in very simple manner – by placing one or more flat plates under the car and securing them using screws or some other way that allows removing and again installing plates with ease. Optimal number of plates that seems to me is four – there is always a possibility that driver hits some obstacle with bottom of the car and breaks a plate – if there are more than one plate, only the broken piece can be replaced, so the expense is lower.
Plates should be made of some rather lightweight material and do not require any special strenght – they shouldn't suffer large stress forces.
Problem that emerges with this solution is high temperatues of exhaust gases, and thus entire exhaust pipe an muffler – this problem can be dealt with in two ways – first, portion of air from air intake grill is transferred between plates and regular bottom of the car, with opening for that air at the rear of the car (dimensions of rear opening - some 10-20 mm high and wide almost as a car), creating air flow in that area, removing hot air away (behind the car); second, mounting heatspreaders across exhaust pipe connected with plates made of metal, aluminium for example, so air beneath car takes cooling part, and entire plates act as a big heatspreader; combination of this two solutions is possible too. Part of solution is that too that exhaust pipe could be done in quadrangular cross section shape, with bottom in plane leveled with plates, so the air beneath would be partially in direct contact with exhaust pipe.
If exhaust gases temperatures should not present any problem even without some sort of cooling, even better.

3.3.5 Steering wheel

An imperative for steering wheel in Peugeot 707 is as large as possible information feedback from road to the driver – it should be very direct (if possible, less than two turns from end left position to the end right position), sensitive, full of information for driver and shouldn't be (too)soft – steering wheel needs to make you feel entire car, to the last little part of it.
Hydraulic servo is much more desireable than any form of electro servo, regardeless that hydraulic is more expensive.

3.4 Drivetrain

3.4.1 Brief introduction

One of the driving joy key ingredients and by far most environment affecting part of every car – engine in the first place, and than the rest of the drivetrain. I won't take here into consideration fuel cells and hydrogen solutions as energy source since they are quite far at this moment from possible implementation into mass production; as best available solution for environment-friendly fun package I see hybrid technology combining perfected internal-combustion engines and electro motors.

3.4.2 Alternative fuel/energy sources

First of all, I have to mention natural gas – far more cleaner fuel among other advantages (compared to gasoline) which drives petrol engines seamlessly even reducing stress on engines up to 30% and extending their expected lifetime. The availability of gas is very good, you can buy it and fuel up your tank probably in every city by now. The only backdraw is slightly reduced engine power, but compared to numerous advantages on the other side, that fault doesn't hold significant weight on it's side.
Second, biodiesel – this type of fuel for diesel type engines won't be considered here. Reasons – low availability on fuel stations and environmental issues involved with production of the fuel. Also, alcohol won't be considered as possible fuel for petrol engines.
And finally, electric energy – the cleanest and most efficient energy source currently available for mass usage to human civilization in general.

3.4.3 Engines

PSA Group already presented hybrid concepts, using combination of HDI turbodiesel internal-combustion engine and electro motors which is great, though my first pick would be one other combination – petrol engine using natural gas as fuel and (two) electro motors. Reasons?
Here they are: main two advantages of (turbo)diesel engine over petrol engine of the similar displacement are greater torque and higher efficiency at low load; that especially comes up in city-driving (higher efficiency results with significantly lower fuel consumption) and at overtaking without shifting gears downward (higher torque, also available at lower rpm's). On the other hand, comparable displacement petrol engine without any turbo or compressor aid revolutes significantly higher, typically almost 50% more revolutions per minute which is great if you want to drive sporty, moreover, petrol engines are lighter, cheaper and easier to maintain, as well as they require significantly less expenses to maintain during lifetime of the engine.
And now, we have electro motors. PSA presented electro motors capable of providing 15kW (20.4 bhp) and more important, 400Nm of torque. Therefore, two of this electro motors, each driving one rear wheel, provides 40bhp and massive amount of 800Nm of torque. That impressive figure combined with, for example, 147Nm provided from Peugeot 1.6 litres petrol engine (110 bhp), sums up to 947Nm of torque; 2.0 Peugeot petrol engine gives round 200Nm of torque – so, if Peugeot 707, or any other Peugeot, as engine combination uses Peugeot petrol engine and two of these existing PSA electro motors, that combination gives some 950 to 1000 Nm of torque. Anyone need more? Not likely, unless yo're driving truck or rally car. In this situation, extra 68 to 120 Nm provided by HDI engines doesn't seem very important. Furthermore, electro engines provide great torque right from start of rpm's – perfect aid to petrol engines. Also, entire city driving routes could be done simply by using only electro motors as propelling force of your Peugeot car – no pollution, no noise – perfect. Go out of the urban area, and petrol engine shows all it's bhp and rpm glory backed up with mostly welcomed 40bhp and unfailingly comfortable 800Nm; furthermore, petrol engine using natural gas produces significantly less pollution than diesel engine and uses cheaper fuel at cost of just some 10-15% drop in engines power – nothing that these two little fellows driving rear wheels can't retrieve; if you want extra excitement, simply by pushing button, or, if you run out of gas, automatically, internal-combustion petrol engine switches from gas to gasoline tank as fuel source.
Very appealing is posibility to charge batteries for electro engines using any conventional 110/220v wall outlet, so you could simply charge up your Peugeot batteries whenever and wherever you need to. Also, electric power generators by all means should be fitted in to use any braking or downhill motion to charge up batteries, and by doing so make use of that easily available extra energy that would be otherwise wasted.
Indeed, HDI and electro motors combination can also be used in great manner, as already PSA showed on functional prototypes, but petrol engine using natural gas or gasoline if needed and the same elctro motors combination just fits better together – this combination perfectly backs up each others weak spots and together provides synergy in full meaning of that word – with this combination you get ultimately environmentaly-friendly, fuel savy, already available and ready for mass production, non-expensive and easy to maintain, yet powerful and explosive in performance terms engines combination more than capable to generate smile on passengers faces. Especially on the driver's face.

3.4.4 Drivetrain combinations

3.4.4.1 Engine combinations (as I see it):

I) Peugeot petrol internal-combustion engine + 2 PSA electro motors:

a)Peugeot 1.6 litres 16 valve petrol engine (110bhp, 147Nm, max. power at 5800rpm, max. torque available at 4000rpm) driving front wheels + two PSA electro motors, each driving one rear wheel and providing 20bhp and 400Nm torque. All together, 150bhp and 947Nm torque.

b) Peugeot 2.0 litres 16 valve (141bhp at 6000rpm, 200Nm at 4000rpm) driving front wheels + two PSA electro motors, each driving one rear wheel and providing 20bhp and 400Nm torque. All together, 181bhp and 1000Nm torque,
or,
Peugeot 1.6 turbo petrol engine (150bhp) + two PSA electro motors.

c) Eventually, if can be fitted under the front hood, alternative to the b) option:
Peugeot 2.2 litres 16 valve (163bhp at 5875rpm, 220Nm at 4150rpm) driving front wheels + two PSA electro motors, each driving one rear wheel and providing 20bhp and 400Nm torque. All together, 193bhp and 1020Nm torque,
or,
strenghtened 1.6 turbo enine providing some 160-170bhp.

Note: I lack information whether some of this engines cannot use gas as fuel source (1.6 turbo perhaps), if that is the case, such engine should be discarded from 707 hybrid. Also, 1.4 engine could be fitted in starting basis propulsion combination.

II) Peugeot HDI turbodiesel internal-combustion engine + 2 PSA electro motors:

a) 1.6 HDI (110bhp at 4000rpm, 260Nm at 1750rpm) driving front wheels + two PSA electro motors, each driving one rear wheel and providing 20bhp and 400Nm torque. All together, 150bhp and 1060Nm torque.

b) 2.0 HDI (136bhp at 4000rpm, 340Nm at 2000rpm) driving front wheels + two PSA electro motors, each driving one rear wheel and providing 20bhp and 400Nm torque. All together, 176bhp and 1140Nm torque.

c) If can be fitted: 2.2 HDI (170bhp at 4000rpm, 370Nm at 1500rpm) driving front wheels + two PSA electro motors, each driving one rear wheel and providing 20bhp and 400Nm torque. All together, 210bhp and 1170Nm torque.

3.4.4.2 Gearboxes

Existing Peugeot gearboxes matching selected engines are to be used. I personally preffer manual gearboxes in general. Automatic gearboxes should leave option for driver to change gears manually at will, wheter using buttons, levers or gearing stick; four-speed gearboxes should be discarded.

3.4.4.3 Propulsion and energy sources positioning

Internal-combustion engines should be fitted under the front hood (just like it is common for all Peugeot models), along with belonging gearbox matching particular engine. At rear, each electric engine is mounted in one rear wheel and drives that wheel. Also, fuel tanks, batteries and generators are to be placed around rear end of the car, below trunk. This configuration of weight allows similar weight distribution over both axels. There is enough space below trunk area for placing all this.
HDI using propulsion combinations require only one fuel tank. Petrol engines should require two tanks - one for gasoline and one for gas. I cannot say exact volumes of the tanks with available informations, but some 50-60 litres one tank for HDI or two around 30 litres for petrol engines could be fitted.

3.5 Aerodynamics

Profile shape of the car reminiscenceing water drop shape should be aerodynamics-friendly, also aided by diffusor, perfectly flat bottom and rims aerodynamics funcionality (as previously explained in rims explanation section).
I can only guess figures related with aerodynamics, and my estimation is that the drag coefficient would be probably somewhere around 0.26.

 

 

4) Connection with contest theme (P.L.E.A.S.E.)

4.1 Pleasurable (to drive)

This vehicle is definitely pleasurable to drive. It is in it's very essence.

4.2 Lively

Liveliness is definitely one of the key characteristics of this concept – it is designed to make you feel excited, lively and yearning for driving it, just by watching it.

4.3 Efficient

Related request with the following ones – and Peugeot 707 fulfills them all – 707 is extremley efficient in terms of very fuel/energy saving and economical usage yet powerful, ease of use whether for everyday use, long trips or just fun driving, low air resistance, low maintaining costs, low or even no noise at all generating in urban areas, and so on.

4.4 Accessible

Entrance to passengers cabine with four full comfort seats is very easy and accessible, trunk space is also very easily accesible and useful. Entire interior is shaped and carried out ergonomically and functionally.

4.5 Simple

This concept is by all means simple to use in any manner, abide in, drive, and maintain.

4.6 Ecological

Environment-friendly awareness is one more key characteristic of this concept – and this especially applies do drivetrain – engines and used energy sources at most (especially natural gas and even more electric power) – this concept is even capable of driving using just electro motors without generating any pollution at all!

 

 

5) Connection with Peugeot heritage and values and final words

5.1 Heritage and values awareness of the Peugeot brand

During developing ideas for concept and by time building concept itself, I informed myself with Peugeot brand history, values it represents, visions of future and wished goals to be achieved (using useful website www.peugeot.com among other sources combined with previous knowledge about Peugeot).
Unfortunately, I wasn't able to find official Peugeot mission and vision, but, in my humble opinion, 707 is definitely a Peugeot, comprising all merits that make Peugeot just Peugeot.

5.2 Target market

As finishing marketing student, I wanted to touch also and market area topic, at least briefly; even more, this topic is tightly connected with the previous one.
Let's assume that 707 is considered to go to production. Surely, market research should be carried out before going into actual production, but as I see it without research, backed up with some related theoretical knowledge and available informations, 707 not just fits semlessly within market share that already presents Peugeot customers or those who wish to become one of them, but even more, it appeals to extend that market share base.

First, 707 audits extremely ecological aware market niche, which at this moment occupies only Toyota Prius - 707 is by far more attractive and appealing alternative. It is about time for Peugeot to present hybrid production model, the sooner the better, since Toyota already took the costs of educating and preparing the market, and other competitors are still absent from this area; 707 is a perfect candidate for such task.
Second, 707 audits younger people who consider buying new car, a car that offers joy, environment-friendliness, comfort, low costs of maintaining, usability, and, above all, a car tat gives both aesthetics and driving spectacle, a car that allures positive emotions and satisfaction.