- actual external diameter
means the external diameter of a disc measured by the Technical Service prior to the test;
- actual test mass
means the mass measured by the Technical Service prior to the test;
- brake factor
means the input to output amplification ratio of the brake.
- brake input threshold torque
means the input torque necessary to produce a measurable brake torque;
- cab
means the operator enclosure which surrounds the operator by means of a physical barrier and prevents the free passage of external air into the area of the operator.’
- declared brake input threshold torque
means the brake input threshold torque declared by the manufacturer and which is representative for the brake;
- declared external diameter
means the external diameter of a disc declared by the manufacturer which is representative external diameter for the disc;
- effective length of the cam shaft
means the distance from the centre line of the S-cam to the centre line of the operating lever;
- energy source
means a device that provides the energy required to actuate the brakes, either directly or indirectly through an energy storage device;
- energy storage device
means a device that stores the energy provided by the energy source to apply or release the brakes.’
- External surface
means the outside of the vehicle including wheels, tracks, doors, bumpers, bonnet, access means, tanks, mudguards, exhaust system.
- identical
means parts having identical geometric and mechanical characteristics and the materials used for the components of the vehicles;
- Laden vehicle
means a vehicle loaded at its technically permissible maximum laden mass;’
- net power
means the engine power obtained on a test bench at the end of the crankshaft or its equivalent at the corresponding engine speed with the auxiliaries, listed in Table 1 of Annex 4 to UNECE Regulation No 120, 01 series of amendments, determined under reference atmospheric conditions.
- nominal external diameter
means the external diameter which the manufacturer specifies for the disc on which the relevant test is carried out by the Technical Service;
- nominal test mass
means the mass of a disc or drum which the manufacturer specifies for the disc or drum, respectively, with which the relevant test is carried out by the Technical Service;
- pollutant exhaust emissions after-treatment system
means the passage of exhaust gases through a device or system whose purpose is to chemically or physically alter the emitted pollutants prior to their release to the atmosphere, including catalysts, particulate traps or any other component, system or separate technical unit for the reduction or treatment of the engine gaseous and particulate matter exhaust pollutant emissions;’
- pollution control device
means a component, system or separate technical unit which is part of the pollutant exhaust emissions after-treatment system;
- Radius of curvature
means the radius of the arc of a circle which comes closest to the rounded form of the component under consideration.
- reference axle
means an axle for which there is a test report;
- reference brake
means a brake for which there is a test report;
- replacement pollution control device
means a component, system or separate technical unit intended to replace, partially or fully, a pollutant exhaust emissions after-treatment system on a vehicle type-approved in accordance with Regulation (EU) No 167/2013 and this Regulation;’
- subject towed vehicle
means a towed vehicle representative of the towed vehicle type for which type-approval is sought;
- Track belt
means a continuous flexible rubber like belt, reinforced internally to enable the tractive forces.’
- Track chain
means a continuous metallic chain which engages with the track driver and where each link is with a transversal metallic track shoe, the latter optionally padded with a rubber strip for road surface protection.
- Track driver
means the sprocket or cage wheel in the track undercarriage that transmit torque from the vehicle drive system to the track belt or track chain.
- Track idler
means sprockets or pulleys in the track undercarriage that do not transmit torque to the track belt or track chain, their main function being the tensioning of the track chain or track belt;
- Track rollers
means the cylinders in the track undercarriage that transmit the mass of the vehicle and track undercarriage to the ground via the track belt or track chain.
- Track undercarriage
means a system comprising at least two of the following items: track rollers, track idler and track driver, with a continuous track chain or track belt running around them.
- Tracks normally fitted
means the type or types of track provided by the manufacturer on the vehicle type in question and specified in the information document the template of which is set out in Article 2 of Implementing Regulation (EU) 2015/504;’
- transmission
means the combination of components comprised between the control device and the brake, excluding the control lines, supply lines and supplementary lines between tractors and towed vehicles, and linking them functionally through mechanical, hydraulic, pneumatic or electric means or through the use of a combination of those means;
- Tyres normally fitted
means the type or types of tyre provided by the manufacturer on the vehicle type in question and specified in the information document the template of which is set out in Article 2 of Commission Implementing Regulation (EU) 2015/504;
- Virtual terminals
means electronic on-board information systems with display screens that provide an operator with visual information on the performance of the vehicle and its systems, and that allow the operator to monitor and control various functions via a touch screen or keypad.