How a Fiat TWIN AIR 3 cylinder engine works!

Furthermore, by taking the concept of downsizing to the extreme and masterfully tuning the basic mechanics, the new family delivering from 65 to 105 HP emits 30% less CO2 than an engine of equal performance.

Significantly the new TwinAir 85 HP two-cylinder engine will complement the many technological solutions already adopted by the Fiat 500 to contain consumption and emissions as demonstrated by the recent expansion of the engine range, now featuring a second-generation 1.3 MultiJet delivering power of up to 95 HP.

With 8 injections per cycle, the 1.3 MultiJet II improves low rpm torque delivery by up to 38% and cuts CO2 emissions by 6%.

Again with a focus on environmental protection, the Fiat 500 (saloon and cabrio) is available with Start&Stop, the system which temporarily stops the engine and starts it again when the car is stationary with the engine idling: this reduces urban cycle average consumption by up to 12%.

The principles of the Fiat 500 range are also implemented in eco:Drive, innovative software for analysing driving behaviour and helping motorists optimise consumptions and emissions by using the USB port of the Blue&Me system.

In short, the Fiat 500 perfectly expresses the commitment of Fiat in the field of environmental protection and encourages users to adopt a more responsible, eco-friendly use of the car. It is no coincidence that, for the third year in a row, Fiat is the most environmentally-friendly of the top-selling 10 car brands in Europe, with an average CO2 emission level of 127.8 g/km, compared to the market average of 145.8 g/km (analyses carried out by the independent institution Jato Dynamics).

A fundamental boost to obtaining this result was certainly given by the extraordinary growth of methane, the most eco-friendly and cost-effective fuel available on the market today.

A forward-thinking direction chosen over ten years ago, that has made Fiat the undisputed European leader in factory-fitted methane systems (OEM), as demonstrated by nearly 400,000 units sold to date in the Natural Power range, which includes 14 bi-fuel (methane/petrol) models cars and commercial vehicles - for responding to all mobility needs.


TwinAir 85 HP, world preview


This is a brand-new concept on the worldwide auto scene and confirms the leadership of the Fiat Group in this field.

Using next-generation technology, the new engine implements the revolutionary MultiAir system combined with special fluid dynamics optimised for maximum fuel efficiency. Furthermore, by taking the concept of downsizing to the extreme and masterfully tuning the basic mechanics, the new family – delivering from 65 to 105 HP – emits 30% less CO2 than an engine of equal performance.

On sale from next September, the 500 will be the first Fiat model to adopt this, which will be the progenitor of a new family of engines: a 85 HP (900 cc) turbo two-cylinder with the lowest CO2 emission for a petrol engine (92 g/km with a Dualogic robotised gearbox and 95 g/km with manual gearbox) without skimping on performance or driving pleasure.

This is thanks to the small-sized turbine which, combined with dedicated valve management strategies, minimises transient response times and, at the same time, keeps maximum power levels high. In this way, despite its small size, the engine ensures excellent performance and an appreciable reduction in fuel consumption: compared with a 1.2 8v, the new 85 HP turbo has 23% more power and a 30% better performance index.

In fact, the performance of the two-cylinder is not only equivalent to a 1.4 16v, but consumption is a remarkable 30% lower.
Equipped in this way, the Fiat 500 reaches a top speed of 173 km/h and accelerates from 0 to 100 km/h in only 11 seconds.

This remarkable performance corresponds to a significant reduction of fuel consumption and emissions: 4.1 l/100 km and 95 g/km respectively on the urban cycle (with manual gearbox), that becomes 4.0 l/100 km and 92 g/km with a Dualogic robotised gearbox. Furthermore, the Fiat 500 with TwinAir 85 HP is provided with an ECO button – positioned on the dashboard – for further cutting fuel consumption in cities and guaranteeing very eco-friendly running.

Two driving modes can be selected: Normal and ECO.

In the first mode, the ECO function is off and the engine delivers the maximum available torque (145 Nm), guaranteeing prompt, brilliant response and a "sportier" driving feel.

Steering assistance is also specifically calibrated for Normal mode. No indication appears on the dashboard in this mode (City is not selected). Consequently, this configuration is recommended for maximum response and full enjoyment of all available torque.
In ECO mode, instead, the emphasis is on "eco-friendly" engine running: torque delivery is cut off to 100 Nm at 1750 rpm to minimise consumption and promote a driving style more suitable for city traffic.

The steering wheel is lighter (CITY mode is automatically selected). The driver only needs to press the specific button on the dashboard to activate the ECO function.

The lettering ECO will appear on the panel (the letter “E” will appear on the panel if the car has a Dualogic robotised gearbox). Furthermore, the Dualogic shifting strategy also switches to ECO mode to further optimise fuel consumption.

Furthermore, compared with a medium-sized four-cylinder of equal performance, the new engine is significantly shorter (-23%) and lighter (-10%), opening the way to further developments, such as methane fuel supply or hybrid technology combinations, again on the theme of greater eco-friendliness.

In particular, a methane version of the TwinAir will be available soon providing a further CO2 emission reduction, by adopting a pair of special injectors in addition to the petrol injectors on the intake manifold ducts. Improving on these fuel saving results using internal combustion engines will be difficult and alternative technologies will need to be developed






Author: AL
Source: Autolatest