Document ID: chunk:federal_register_of_legislation:F2012C00535:front:0:p5
Version: federal_register_of_legislation:F2012C00535
Segment Type: other
Provision Reference: 
Character Range: 14763–17712

in which a modified vehicle type is approved on the basis of an earlier approved vehicle type, by comparison of structure, potential energy and residual space criteria.

       2.9. "Articulated vehicle" means a vehicle which consists of two or more rigid sections which articulate to one another, the passenger compartments of each section intercommunicate so that passengers can move freely between them; the rigid sections are permanently connected so that they can only be separated by an operation involving facilities which are normally only found in a workshop.

       2.10. "Passenger compartment(s)" means the space(s) intended for passengers' use excluding any space occupied by fixed appliances such as bars, kitchenettes or toilets.

       2.11. "Driver's compartment" means the space intended for the driver's exclusive use and containing the driver's seat, the steering wheel, controls, instruments and other devices necessary for driving the vehicle.

       2.12. "Occupant restraint" means any device which connects a passenger, driver or crew member to his seat, during a rollover.

       2.13. "Vertical longitudinal central plane" (VLCP) means the vertical plane which passes through the mid-points of the front axle track and the rear axle track.

       2.14. "Residual space" means a space to be preserved in the passengers', crew and driver's compartment(s) to provide better survival possibility for passengers, driver and crew in case of a rollover accident.

       2.15. "Unladen kerb mass" (Mk) means the mass of the vehicle in running order, unoccupied and unladen but with the addition of 75 kg for the mass of the driver, the mass of fuel corresponding to 90 per cent of the capacity of the fuel tank specified by the manufacturer, and the masses of coolant, lubricant, tools and spare wheel, if any.

       2.16. "Total occupant mass" (Mm) means the combined mass of any passengers, crew who occupy seats fitted with occupant restraints.

       2.17. "Total effective vehicle mass" (Mt) means the unladen kerb mass of the vehicle (Mk) combined with the portion (k = 0.5), of the total occupant mass (Mm), considered to be rigidly attached to the vehicle.

       2.18. "Individual occupant mass" (Mmi) means the mass of an individual occupant.  The value of this mass is 68 kg.

       2.19. "Reference energy" (ER) means the potential energy of the vehicle type to be approved,  measured in relation to the horizontal lower level of the ditch, at the starting, unstable position of the rollover process.

       2.20. "Rollover test on a complete vehicle" means a test on a complete, full-scale vehicle to prove the required strength of the superstructure.

       2.21. "Tilting bench" means a technical device, an arrangement of tilting platform, ditch and concrete ground surface, used in the rollover testing of a complete vehicle or body sections.
       2.22. "Tilting platform" means a rigid plane which