ISO 789-13:2018 農業用トラクター—テスト手順—パート13：用語, 語彙と標本のテストレポート | ページ 5

3.38.1.1

横断面

<車輪付きトラクターの場合> 後車軸の中心線を含む垂直面

3.38.1.2

横断面

<軌道敷設用トラクターの場合> 駆動スプロケット軸の中心線を含む垂直面

3.38.1.3

縦正中面

正中縦面

対称縦面

注記 1:二重車輪の中心面は、一方の車輪の内縁と他方の車輪の外縁から等距離にあり、直線 Δ は、この特定の場合、車輪の中心平面の交点である。デュアルホイールとアクスルピンの軸を通る垂直面。

注記 2: ISO 612:1978, 第 5 項から適応。

注記 3:縦正中面は、軌道敷設トラクターにも適用できる。

[出典:ISO 5700:2013, 3.8]

3.38.2

水平基準面

激しい接触が想定される地面レベル

3.1

agricultural tractor

self-propelled agricultural vehicle having at least two axles and wheels, or endless tracks, particularly designed to pull agricultural trailers and pull, push, carry and operate implements used for agricultural work (including forestry work), which may be provided with a detachable loading platform

Note 1 to entry: The agricultural vehicle has a maximum design speed of not less than 6 km/h and may be equipped with one or more seats.

[SOURCE:ISO 12934:2013, 3.1]

3.2

wheelbase

distance at ground level between two vertical planes passing through the centres of the front wheels and the rear wheels with tractor and wheels in the same straight ahead position

Note 1 to entry: See Figure 1.

3.3

track

tread

distance at ground level between two vertical planes passing through the centreline of ground contact of the tyres parallel to the median longitudinal plane of the tractor with the wheels in the straight ahead position

Note 1 to entry: In the case of dual wheels, it is the distance at ground level between two planes passing through the centreline of the dual wheels. In the case of track-laying tractors, it is the distance between the two vertical planes passing through the centreline of ground contact of the tracks.

3.4

tractor mass

mass of a tractor as submitted for test

3.5

ballasted mass

mass of the tractor with ballasting devices and without the driver mass while the tractor is in running order with tanks, circuits and radiator full, and any track equipment or additional front wheel drive components required for a normal use included; and in the case of tractors with pneumatic tyres, sometimes with liquid ballast in the tyres

[SOURCE:OECD Code 2: February 2017, 2.12]

3.6

unballasted mass

mass of the tractor in working order with tanks and radiators full, roll-over protective structure with cladding, and any track equipment or additional front-wheel drive components required for normal use

Note 1 to entry: Not included are the operator, optional ballast weights, additional wheel equipment, special equipment and loads.

[SOURCE:ISO 5700:2013, 3.2]

3.7

rated engine speed

engine speed specified by the tractor manufacturer for continuous operation at full load

3.8

maximum engine speed

engine speed at which the throttle control is at the maximum setting

3.9

engine power

power measured at the flywheel or the crankshaft

[SOURCE:OECD Code 2: February 2017, 2.2]

3.10

power take-off power

power measured at any shaft (with the tractor stationary) designed by the tractor manufacturer to be used as a power take-off

3.11

axle power

sum of the powers measured at all powered axles

3.12

power at the drawbar

power available at the drawbar which can be sustained for at least 20 s, or the time needed to cover a distance of at least 20 m, whichever is longer

3.13

maximum drawbar pull

mean maximum sustained pull the tractor can maintain at the drawbar over a given distance where the pull is being exerted horizontally and in the vertical plane containing the longitudinal axis of the tractor

[SOURCE:OECD Code 2: February 2017, 2.6]

3.14

maximum permissible torque

maximum torque specified by the manufacturer for the purpose of a test

3.15

external hydraulic service

source of hydraulic power, derived from the hydraulic system of the agricultural tractor (3.1) , available for use on an implement mounted on, coupled to or otherwise used in conjunction with it

[SOURCE:ISO 10448:1994, 3.1]

3.16

coupler pair

pair of female hydraulic couplers compatible with male couplers as specified in ISO 5675, mounted on agricultural tractors (3.1) and connected to the hydraulic system to allow flow from one coupler to the other

[SOURCE:ISO 10448:1994, 3.2]

3.17

available differential pressure

steady state difference of the hydraulic pressure between two male coupler parts on the implement side

[SOURCE:ISO 10448:1994, 3.3]

3.18

maximum pressure

maximum steady state hydraulic pressure at either male coupler connected to a coupler pair (3.16)

[SOURCE:ISO 10448:1994, 3.4]

3.19

maximum loop return pressure

maximum steady hydraulic pressure at the male coupler returning flow to a hydraulic system that can reverse the flow through that coupler

[SOURCE:ISO 10448:1994, 3.5]

3.20

maximum sump return pressure with coupler

maximum steady state hydraulic pressure at the male coupler returning flow directly to the reservoir

[SOURCE:ISO 10448:1994, 3.6 (1)]

3.21

maximum sump return pressure without coupler

maximum steady state hydraulic pressure at an M22 × 1,5 or M27 × 2 thread size port in accordance with ISO 6149-1, ISO 6149-2 or ISO 6149-3, returning flow directly to the reservoir

[SOURCE:ISO 10448:1994, 3.6 (2)]

3.22

rated maximum hydraulic pressure

maximum pressure as specified by the tractor manufacturer for continuous use

3.23

maximum hydraulic power

hydraulic power calculation based on the measured flow and available coupler outlet pressure (the pressure near the coupler where oil is exiting from the tractor)

Note 1 to entry: The calculation does not take into account return pressure losses.

3.24

maximum useable hydraulic power

maximum useable continuous hydraulic power

hydraulic power calculation based on the measured flow and available differential pressure (the pressure near the coupler where oil is exiting from the tractor minus the pressure near the coupler where oil is re-entering the tractor)

Note 1 to entry: The calculation takes into account the return pressure losses and defines the useable hydraulic power available.

3.25

peak pressure

maximum instantaneous hydraulic pressure at either male coupler connected to a coupler pair (3.16)

[SOURCE:ISO 10448:1994, 3.7]

3.26

dynamic radius index

effective radius corresponding to the distance travelled by the tractor in one rotation of the driving wheels (i.e. this distance divided by 2π), when the tractor is driven without drawbar load at a speed of approximately 3,5 km/h

3.27

non-mechanical drive system

system which has a non-mechanical coupling between the engine and the power take-off

Note 1 to entry: A fluid or electrical power transmission system is considered to be non-mechanical. A cooling component may be included.

3.28

deviation from rated PTO speed

rotational frequency per unit time (min⁻¹) of the PTO output shaft above or below the rated (standard) PTO rotational frequency of the system

3.29

safety element

air cleaner element fitted downstream of a primary, barrier-type element for the purpose of providing the engine with protection against dust in the event of either any type of primary element failure, or dust being present during the removal of the primary element for servicing

3.30

steering control effort

force applied to the steering control in order to steer the tractor

[SOURCE:ISO 10998:2008, 3.2.1]

3.31

turning radius

radius of the circular path described by the centre of tyre contact with the surface of the test site of the wheel describing the largest circle

3.32

turning diameter

diameter of the circular path described by the centre of tyre contact with the surface of the test site of the wheel describing the largest circle when the tractor is executing its sharpest practicable turn

Note 1 to entry: See Figure 2.

3.33

clearance diameter

diameter of the smallest circle which will enclose the outermost points of projection of the tractor and its equipment while executing its sharpest turn

3.34.1

specific fuel consumption

mass of fuel consumed per unit of work

Note 1 to entry: When consumption is measured by mass, to obtain hourly consumption by volume and the work performed per unit volume of fuel, a conversion of units of mass to units of volume shall be made using the fuel density value at 15 °C. When consumption is measured by volume, the mass of fuel per unit of work shall be calculated using the density corresponding to the fuel temperature at which the measurement was made. This figure shall then be used to obtain hourly consumption by volume and the work performed per unit volume of fuel, using the density value at 15 °C for conversion from units of mass to units of volume

[SOURCE:OECD Code 2: February 2017, 2.7.2]

3.34.2

specific energy

work per unit volume of fuel consumed

[SOURCE:OECD Code 2: February 2017, 2.7.3]

3.35

specific reagent consumption

mass of reagent consumed per unit of work

[SOURCE:OECD Code 2: February 2017, 2.8.1.1]

3.36

diesel particulate filter

DPF

system which traps particulate matter and either passively or actively converts the trapped particulate matter into carbon dioxide and ash

Note 1 to entry: The carbon dioxide is released to the atmosphere and the ash is stored within the DPF.

3.37

slip

percentage difference of theoretical maximum possible distance travelled and the actual distance travelled

3.39.1

horizontal fore-and-aft coordinate

horizontal distance of the centre of gravity from the traverse reference plane

3.39.2

vertical coordinate

vertical distance of the centre of gravity from the horizontal reference plane

3.39.3

lateral coordinate

horizontal distance of the centre of gravity from the median longitudinal plane of the tractor