Specifications

Results for the Electric Mobility Category (hydrogen fuel cell, solar, ‘Plug-In’-
electricity) will be expressed in kilometres per kilowatt hour (km/kWh).
Fuel Cell vehicles will use a flow meter to measure the H2 consumed. The
result will be calculated using the NCV of H2 listed below
The results of Solar and ‘Battery-Only’ vehicles will be determined by using
joulemeters which are supplier by the Organisers.
The results for hybrid vehicles will be expressed based on the primary energy
used.
No additives, catalysts, water injection, or fuel treatment devices are allowed.
Internal Combustion Fuel NCV by
mass (kJ/kg)
Shell FuelSave Unleaded 95 (Europe and Asia)
Shell Regular 87 (US) Petrol / Gasoline
42,900
Shell FuelSave Diesel (Europe)
Shell Diesel (Asia and US)
42,600
Fatty Acid Methyl Ester 37,700
Gas to Liquid 44,000
Ethanol E100 26,900
Hydrogen 119,930
Article 69: Authorised Fuels
• Only the fuels listed in Article 68, as provided to the participants by the
Organisers during the event, are authorised for use during practice and
competition.
• Supplies adequate for practice and competition will be available by the
officials in charge of measuring fuel consumption.
• No additives may be added to the fuel. Only the power derived from the
combustion of the fuel in the presence of air alone within the engine system
may be used for forward propulsion. No other material that could serve as
engine fuel may be used at any time during the event.
• Any participant handling fuel must wear safety glasses and chemically
resistant gloves.
• Weather conditions will vary throughout the event and solar competitors
need to take this effect into account during the competition.
Article 70: Engine Lubricants
The Organisers will provide the engine oils for use by the competitors.
Article 71: On-Board Electrical Energy
• For safety reasons, the maximum voltage on board of any vehicle must
not exceed 48 Volts (this includes on-board batteries, external
batteries, super capacitors, fuel cell stack, etc).
• Only one battery per vehicle is allowed.
A ‘battery’ is defined as a source of electrical energy, which has
exactly two connectors and comes as a single unit. This single unit
may contain more than one sub-unit.
Shell Eco-marathon ® Official Rules 2011 – Chapter 1
23
• This on-board battery must operate all safety devices (e.g. horn, hydrogen
sensor) for the duration of the competition may also operate the starter
motor, the ignition, the instrumentation and electronic management
systems. All other additional sources of electricity are forbidden.