1、BRITISH STANDARD BS 5510:1991 ISO 3965:1990 Methods for Determination of maximum speeds of agricultural wheeled tractorsBS5510:1991 This British Standard, having been prepared under the directionof the Agricultural Machinery and Implements Standards Policy Committee,waspublished underthe authorityof
2、 the Standards Boardand comes into effect on 31May1991 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference AGE/6 Draft for comment 87/77838 DC ISBN 0 580 19531 7 Committees responsible for this British Standard The preparation of this British Standard wa
3、s entrusted by the Agricultural Machinery and Implements Standards Policy Committee (AGE/-) to Technical Committee AGE/6, upon which the following bodies were represented: AFRC Institute of Engineering Research Agricultural and Allied Workers National Trade Group Agricultural Engineers Association B
4、ritish Agricultural and Garden Machinery Association Ltd. County Surveyors Society Department of Trade and Industry (Vehicle Division) Forestry Commission Health and Safety Executive Home Timber Merchants Association of Scotland Local Authority Organizations Ministry of Agriculture, Fisheries and Fo
5、od National Farmers Union Society of Motor Manufacturers and Traders Limited Amendments issued since publication Amd. No. Date CommentsBS5510:1991 BSI 11-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative references 1 3 Maximum design speed calc
6、ulation 1 4 Maximum travel speed measurement 1 Annex A (normative) Specimen test report Maximum travel speed measurement 2 Publication(s) referred to Inside back coverBS5510:1991 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Agricultural Machiner
7、y and Implements Standards Policy Committee. It is identical with ISO3965:1990“Agricultural wheeled tractors Maximum speeds Method of determination” prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, of the International Organization for Standardization (
8、ISO). It is a revision of BS5510:1977intended to harmonize methods for the determination of maximum speeds of agricultural wheeled tractors with those of the current International Standard. It supersedes BS 5510:1977, which is withdrawn. A British Standard does not purport to include all the necessa
9、ry provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Standard ISO 789-1:1981 BS 6347 Performan
10、ce assessment of agricultural tractors Part 1:1983 Methods for determination of available power (Identical) ISO 4251-1:1988 BS AU 50 Tyres and wheels Part 1: Section 4 Agricultural tractor and machine tyres Subsection 4.1:1989 Specification for designations and dimensions for existing (inch) series
11、tyres (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment
12、 table on the inside front cover.BS5510:1991 BSI 11-1999 1 1 Scope This International Standard specifies a method for calculating the maximum design speed and a method for measuring the maximum travel speed of agricultural wheeled tractors. 2 Normative references The following standards contain prov
13、isions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the p
14、ossibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 789-1:1981, Agricultural tractors Test procedures Part 1: Power tests. ISO 4251-1:1988, Tyres and rims (existing series) for agr
15、icultural tractors and machines Part 1: Tyre designation and dimensions. 3 Maximum design speed calculation Calculate the maximum design speed from parameters as specified by the manufacturer, i.e. the rated engine rotational frequency (rated engine speed) (“rated” is defined in ISO 789-1); the tran
16、smission gear ratio for the highest (fastest) forward gear; the dynamic radius index, calculated in accordance with ISO 4251-1, of the maximum size drive wheel tyres recommended by the tractor manufacturer for road use. 4 Maximum travel speed measurement 4.1 Test requirements 4.1.1 Tractor 4.1.1.1 T
17、he fuel specified in the operation manual shall be used. 4.1.1.2 The settings for the carburettor and ignition and/or the fuel injection pump the engine power and the no-load engine rotational frequency shall be as specified by the manufacturer. 4.1.1.3 Front-wheel drive or any additional (power) dr
18、iving axle shall only be engaged when recommended by the manufacturer for road use. 4.1.1.4 The tyres shall be of the same stated size as those used to calculate maximum design speed (clause 3). The tyres shall be new and inflated to the pressure indicated by the tractor manufacturer for road use. 4
19、.1.1.5 The tractor shall be in working order, with full fuel tanks, radiators and with an operator, but without removable ballast weights, special equipment or loads. 4.1.2 Test roadway 4.1.2.1 The roadway shall be straight and allow the maximum speed to be maintained for a minimum test distance of1
20、00m. 4.1.2.2 The surface shall be dry, smooth concrete, or similar finish, swept clean. 4.1.2.3 The surface shall not have more than1,5% slope in the direction of travel and not more than1,5% slope at right-angles to the direction of travel. 4.1.2.4 The approaches to the test roadway shall be of suf
21、ficient length, smoothness and uniformity of slope to ensure a uniform travel speed of the tractor immediately prior to the test measurement. 4.1.3 Ambient conditions The tests shall be made in dry, calm weather with a wind velocity not exceeding5m/s. 4.2 Test procedure 4.2.1 Immediately prior to th
22、e test, the tractor shall be run for a period sufficient to ensure that the engine, transmission oils and coolant are at normal working temperatures. These temperatures shall be maintained during the test. 4.2.2 Drive the tractor over the test roadway with the throttle fully open in the forward gear
23、 producing maximum tractor speed. 4.2.3 Measure the maximum travel speed over a distance of at least100m first in one direction on the test roadway and then in the opposite direction. The time interval for a point on the machine to traverse100m shall be recorded. 4.2.4 Determine the maximum travel s
24、peed as the mean of the results of the two successive test drives in opposite directions. 4.3 Test report The test report shall be in accordance with the specimen test report presented in Annex A.BS5510:1991 2 BSI 11-1999 Annex A (normative) Specimen test report Maximum travel speed measurement The
25、test report (see 4.3) shall contain the following information: a) reference to this International Standard; b) type of tractor and drive type (two-wheel drive or four-wheel drive with the front-wheel drive engaged or disengaged); c) make of tractor; d) the number or identification of the tractor; e)
26、 rated engine rotational frequencies (rated engine speeds), in revolutions per minute (r/min); f) type of transmission; g) mass of the tractor as tested, in kilograms; h) tyre size: rear axle, front axle; i) tyre pressure, in kilopascals, and rolling radius of tyres used in the test; j) confirmation
27、 of the test track being dry; k) type of test track, i.e. concrete, asphalt, etc.; l) longitudinal gradient of test track: i.e. level or up to1,5% slope; m) slope at right-angles of test track; n) tractor gear at which test was conducted; o) weather conditions, including wind velocity in metres per
28、second and direction across the test roadway; p) tractor speed measurements, in accordance with the table: q) test speed, v of the tractor in kilometres per hour, determined according to the equation: The value of speed, v, shall be rounded to the second decimal digit for individual measurements and
29、 to the first decimal digit for the average value. Test No. Direction of travel (e.g. left to right, right to left) Time interval t Tractor speed a s km/h 1 2 t 1 t 2 v 1 v 2 a where l is the test length, in metres (100 m minimum, see4.2.3). v 36l , t - = v v 1 v 2 + 2 - =BS5510:1991 BSI 11-1999 Pub
30、lication(s) referred to See national foreword.BS 5510:1991 ISO 3965:1990 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international le
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