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Toyota Prius Ethanol Hybrid

Fuel company St1 recently did tour of Sweden meeting local politicians to discuss possibile locations for their ethanol production facilities. The tourwas done in an experimental vehicle that only emits 45g CO2/kmon E85, and thereby meets the requirements of the Eco Super-car" classification. 


Lobbying for locally produced ethanol
, St1 has met national politicians and ministry officials in Stockholm to let them know about their intention to produce ethanol for cars at local facilities across the country. The ethanol tour was a natural extension of their work since, the celulose raw materials are found locally.


The government aims to have it's vehicle fleet fossil fuel free by 2030. Some think it will be difficult to reach that goal, but St1say it can happen sooner. One of St1´s messages to the politicians is the importance of reintroducing ethanol, E85 in the first place, as the main biofuel. It is the only biofuel that can be distributed across the whole country today. With St1´s patented production method, Etanolix, ethanol can be produced from waste from the food industry at small facilities next to food manufacturers.

The end product, RE85, is equvilent to normal ethanol fuel. What differs is the production method. RE85 is already being produced and marketed in Finland. It is 100 percent ethical, not to be confused with ethanol made from raw materials from agricultural land that could be used for food production. 

Toyota Prius becomes ethanol hybrid

To demonstrate the environmental benefits that are possible with existing techniques, St1 and BSR have redesigned and built an experimental Prius. It's been converted to an ethanol hybrid that can run on just E85, it can also be charged directly via mains electricity. Besides the ethanol conversion, the car is equipped with lightweight wheels and eco tires. The car is also lowered 30mm to reducedrag and reduce fuel consumption.

The performance of the car is measured by its emitted fossil CO2 per kilometer. The definition of an eco vehicle allows CO2 emissions of 120g/km maximum. A factoy Toyota Prius emits 89g CO2/km. Once converted to E85, the emissions are reduced to a low 45g CO2/km. And if the car is run on RE85, the emissions are cut by half to 22g CO2/km. When you compare this with the  requirements for a eco super-car of 50g CO2/km, it is easy to see the potential of the concept.

Ethanol conversion

  • BSR software optimised for E70 - E85
  • Factory engine power output is retained
  • The software compensates for the lower energy of ethanol over petrol, it also compensates for the non-linear increase of the fuel consumption in different driving situations.

    Battery charging
  • Intelligent battery charging system installed for increased durability (from Primepower).
  • Sensors control the charge, regulating battery temperature
  • Battery can be pluged in at home so that the car always starts fully charged. For shorter trips, up to 2 km, the engine isn´t started at all.

    Other equipment
  • Lightweight wheels: DOTZ Roadster 7 x 17" (from OCL Brorsson).
  • 30mm lowering springs for reduced air resistance and fuel consumption (from H&R).
  • Eco tires from Michelin.

    Emissions
  • Factory Toyota Prius petrol: 89g CO2/km
  • St1 BSR Prius E85: 45g CO2/km
  • St1 BSR Prius RE85: 22g CO2/km

    BSR´s commitment to the environment

    BSR has a strong commitment to the environment holding several records in ethanol conversions. We can add converting an ethanol hybrid - a first in Sweden - to the list of exclusive projects. Click here to read more about BSR´s extensive work with ethanol conversions.

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