Currently reading: Lotus reveals eco engine
1.2-litre three-cylinder unit will be fitted to Jaguar XJ concept
Autocar
News
2 mins read
7 September 2009

Lotus has revealed a ground-breaking 1.2-litre range extender engine.

The unit, which is similar to that found in the Chevrolet Volt, produces 47bhp and will be fitted to a Jaguar XJ as part of a project to create an exectutive saloon with less than 120g/km emissions.

The 56kg three-cylinder petrol engine is attached to an electricity generator and powers both the car’s electric motor and charges a battery pack.

The engine is an all-new design from Lotus and features an aluminium monoblock construction integrating the cylinder block, cylinder head and exhaust manifold in one casting. This reduces weight, assembly costs and engine size, while improving emissions and durability.

Both alcohol-based fuels and petrol can be used. The unit has been designed by Lotus Engineering, the company’s consultancy-division, and will be sold to other manufacturers.

However, a spokesman for the car maker said it was a “possibility” it could appear in a Lotus.

“A lot of Lotus Engineering technology is for other manufacturers but Lotus looks at the best technology with regards to using it in its cars," he said.

Initially the Lotus range extender has been developed for a Jaguar, as part of the “Limo-Green” project funded by Lotus Engineering, Jaguar, MIRA and Caparo.

Jaguar told Autocar this technology could find its way into its road cars.

“This is the sort of technology we are looking towards,” said a spokesman.

An XJ mule will be ready by the end of the year to test the new Lotus range extender. The range extender will be on display at the Frankfurt motor show next week.

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beachland2 8 September 2009

Re: Lotus reveals eco engine

Symanski wrote:
This would be how you'd get round the emissions problem because you no longer have to consider a wide operating range, but rather quite a narrow one.

its the narrow operating range that makes diesel not so practical, at its most efficient operating range for economy its running cool and emits lots of pollutants. they could tune it to be less polluting but it would use more energy.

Greg1 8 September 2009

Re: Lotus reveals eco engine

miecio wrote:
Really? None of Japanese or Korean manufacturers currently use engines with DI, a few years before Mitsubishi and Toyota have tried, but they both failed. Renault hasn't any DI engine (same story as with Mitsubishi), the only one petrol engine across the PSA range with DI is 1.6 THP, which has been designed by BMW. Fiat has just one (1.8 DI Turbo), Ford hasn't till now (1.6 Ecoboost which in fact is still under development). Only BMW, VW and Mercedes have a wide range of petrol DI engines

Lexus IS350 is DI and I suspect some other models are too.

Here's the kicker though for the so-called avant garde makes such as BMW, Lexus, etc.; Both Cadillac (CTS) and Ford (Taurus SHO) run DI engines with class leading power that are able to run on lower octane fuel (87RON). All Euro/Jap engines require at least 91 RON or premium unleaded.

jackjflash 8 September 2009

Re: Lotus reveals eco engine

miecio wrote:
Really? None of Japanese or Korean manufacturers currently use engines with DI, a few years before Mitsubishi and Toyota have tried, but they both failed. Renault hasn't any DI engine (same story as with Mitsubishi), the only one petrol engine across the PSA range with DI is 1.6 THP, which has been designed by BMW. Fiat has just one (1.8 DI Turbo),

Look at Symanski’s Wikipedia link above, Mazda, GM, and others all use direct injection. Now that the emphasis on fuel efficiency has taken center stage getting more horsepower out of smaller engines just about requires the use of direct injection, like I said it is becoming the norm.

miecio wrote:
Ford hasn't till now (1.6 Ecoboost which in fact is still under development). Only BMW, VW and Mercedes have a wide range of petrol DI engines.

This Ford has direct injection now.