Mira Fabia H4V Hybride

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Er is ook al een concept Fabia Hybride auto, er komt geen productie exemplaar er zijn slechts 2 protypen gemaakt voor enkel alleen het testen.

De firma Mira heeft de Fabia-1 Combi ( vanwege de benodigde extra ruimte voor de electro motoren en accus's) gebruikt als basis voor hun Hybride concept.

persbericht ; MIRA

As a “plug-in hybrid” the vehicle can charge its batteries by running its engine or by plugging into the mains. Plug-in hybrids are at the vanguard of new vehicle design; yet MIRA has taken the idea one step further to make the concept far more practical and useful for motorists.


The MIRA Fabia H4V Hybride is based on the popular Skoda Fabia Combi (2007), instantly differentiating itself from the standard model by the unique H4V badge and aerodynamic modifications. The 50/50 hybrid derives power jointly from a 60Kw petrol engine at the front and two 35KW inboard motors powering the rear wheels though MIRA’s clever e-differential. Overall, the H4V differentiates itself from the standard model by returning 64mpg2, as measured on the EU drive cycle. Whilst general levels of performance, such as top speed and acceleration are similar to standard.

The car boasts a battery pack arranged into 3 portable cassettes, each capable of storing 30KW. These storage units could also power external devices, including a range of lifestyle accessory items. The very latest nano-particle technology has been applied to increase the energy density of the already ‘high-tech’ Lithium Ion Phosphate batteries. This ensures the energy pack is as lightweight and compact as possible, whilst delivering superior voltage stability over the charge range. The same Li-Ion Phosphate battery technology is evident in the separate low voltage circuit used to start the engine, insuring the car’s impeccable ‘lead free’ green credentials.

The battery pack in one of the key ingredients of a modern hybrid. With so much effort and expense being invested in the battery pack it makes sense to use it in as many places as possible, not just the car itself. The ultimate aim of the project team is to see the power pack transferred from the car into a range of other devices, which could include camping equipment for SUV variants, or redeployed to power electric jet skis or quad bikes.

Despite the impressively green credentials, headline grabbing hyper-economic mpg figures were never the aim for H4V - to do that the team would logically select a more frugal base vehicle. The selection of the base car is largely unimportant, as far as the technology is concerned; so long as the donor vehicle’s specification included modern features, such as a throttle by-wire system and some other basics, to avoid duplicating unnecessary workload. The project code of H4V, standing simply for ‘a’ Hybrid 4wd Vehicle re-enforces the generic nature of the upgrade.

A 39% improvement is beyond what most traditional hybridisation systems would normally deliver, so MIRA have retuned the engine and created a custom calibration that works in harmony with the electrically driven axel to deliver additional synergies beyond the simple fuel savings possible via ‘torque-neutral’ hybridisation schemes.

A regenerative braking system makes its debut on a MIRA hybrid. Derek explains why: “The viability of such systems requires careful analysis to ensure that the mass penalty is outweighed by the energy recovery potential. The technology has now matured to deliver a tangible economy benefit, not just a ‘feature’ for the marketers.”

The frugal powertrain is supported by a new aero pack, further reducing drag by 8% to achieve a Cd of just 0.299. Aerodynamics makes only a small contribution to EU drive cycle calculations, due to the cycle’s overall low speed character, so it’s often marginalised by those wishing to bias development towards attributes that make the most difference at low speed. Thankfully, MIRA’s approach goes some way to deliver a vehicle that lives up to consumer expectations on real roads.


bronnen Mira & www.germancarscene.com
 

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