BS 6384-1983 Methods for determination of braking performance of agricultural and forestry vehicles《农业和林业车辆制动性能的测定方法》.pdf

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1、BRITISH STANDARD BS 6384:1983 ISO 5697:1982 Methods for Determination of braking performance of agricultural and forestry vehicles ISO title: Agricultural and forestry vehicles Determination of braking performance UDC 630*37 + 631.372:629.11-592BS6384:1983 This British Standard, having been prepared

2、 under the directionof the Agricultural Machinery and Implements Standards Committee, was published under the authority ofthe Board of BSI and comes intoeffect on 29July1983 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference AGE/6 Draft for comment 81/7

3、4284 DC ISBN 0 580 13337 0 Committees responsible for this British Standard This British Standard was published under the direction of the Agricultural Machinery and Implements Standards Committee AGE/-. Its preparation was entrusted to Technical Committee AGE/6 upon which the following bodies were

4、represented: Agricultural Engineers Association British Agricultural and Garden Machinery Association Ltd. County Surveyors Society Department of Industry (Mechanical Engineering) Forestry Commission Health and Safety Executive Home Timber Merchants Association of Scotland Ministry of Agriculture, F

5、isheries and Food National Farmers Union National Institute of Agricultural Engineering National Union of Agricultural and Allied Workers Society of Motor Manufacturers and Traders Limited Coopted member Amendments issued since publication Amd. No. Date of issue CommentsBS6384:1983 BSI 10-1999 i Con

6、tents Page Committees responsible Inside front cover National foreword ii 1 Scope and field of application 1 2 Reference 1 Section 1. General 3 Definitions 2 4 General requirements 3 Section 2. Determination of service brakes performance 5 Introduction 5 6 Method based on measured declaration 5 7 Me

7、thod based on measured stopping distance 8 Section 3. Determination of parking brakes performance 8 Method of test 12 Annex A Specimen test report for agricultural tractors and self-propelled agricultural vehicles 13 Annex B Specimen test report for trailed vehicles 15 Table Requirements for measuri

8、ng accuracy 4 Publication referred to Inside back coverBS6384:1983 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Agricultural Machinery and Implements Standards Committee. It is identical with ISO5697“Agricultural and forestry vehicles Determinat

9、ion of braking performance”, which was developed by Technical Committee ISO/TC23, Tractors and machinery for agriculture and forestry, and was published in1982 by the International Organization for Standardization (ISO). Terminology and conventions. The text of the InternationalStandard has been app

10、roved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used as a decimal marker. In British Standards it is current

11、practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British S

12、tandards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-reference International Standard Corresponding British Standard ISO 3965:1977 BS 5510:1977 Methods for determination of maximum travel speed of

13、agricultural wheeled tractors (Identical) Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to16, 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 indica

14、ted in the amendment table on the inside front cover.BS6384:1983 BSI 10-1999 1 1 Scope and field of application This International Standard specifies methods of measuring the performance of service brakes, based on measured deceleration and on measured stopping distance, and of parking brakes of agr

15、icultural and forestry vehicles. It is applicable to: a) tractors and self-propelled vehicles having a maximum design speed exceeding6km/h; b) trailed agricultural vehicles designed for use at speeds exceeding6km/h, comprising agricultural trailers, towed agricultural machines and implements. 2 Refe

16、rence ISO 3965, Agricultural wheeled tractors. Determination of maximum travel speed. BS6384:1983 2 BSI 10-1999 Section 1. General 3 Definitions For the purpose of this InternationalStandard, the following definitions apply. 3.1 agricultural tractor a self-propelled wheeled or track-laying vehicle,

17、more particularly designed to pull, push, carry and operate implements including trailers used for agricultural work (including forestry work). It may be provided with a detachable loading platform 3.2 self-propelled agricultural vehicle any vehicle, other than a tractor, having its own means of pro

18、pulsion, which is used in agriculture or forestry and which according to its design and the devices fixed to the vehicle is suitable and intended for doing the work such vehicles may be equipped to pull implements and trailers. Additionally, there may be means for receiving the implements and device

19、s required for doing work as well as for intermediate storing of materials which are produced and/or needed during the work 3.3 agricultural trailer a transport vehicle used in agriculture or forestry and which, according to its design, is suitable and intended for coupling to an agricultural tracto

20、r or to a self-propelled agricultural vehicle the term “agricultural trailer” includes agricultural semitrailers, only part of the mass of which is supported by the axle or axles 3.4 agricultural machine or implement a trailed vehicle used in agriculture or forestry and which, according to its desig

21、n and the devices fixed to the vehicle, is suitable and intended for doing the work additionally, there may be means for receiving the implements and devices required for doing work as well as for intermediate storing of materials which are produced and/or needed during the work 3.5 unladen mass mas

22、s of the unladen vehicle 3.6 unladen vehicle a vehicle in running order, complete with fuel, coolant and lubricant (where appropriate) and carrying a driver (if applicable) of75kg but not attendants, optional accessories or load 3.7 laden vehicle unless otherwise stated, a vehicle so laden as to att

23、ain its maximum mass 3.8 maximum axle load the technically permissible axle load for each axle stated by the manufacturer. (The sum of the maximum axle loads may be higher than the technically permissible maximum mass of the vehicle) 3.9 maximum mass the technically permissible maximum mass of the v

24、ehicle stated by the manufacturer. (This may be higher than the maximum mass authorized by a national administration) 3.10 braking device A combination of parts, the function of which is to reduce the speed of a moving vehicle or to bring it to a halt or to keep it stationary if already halted. The

25、braking device consists of the braking device control, the braking device transmission and the brakes themselves. 3.10.1 braking device control the part of the braking device actuated directly by the driver to supply to the braking device transmission the energy required for operating the brakes 3.1

26、0.2 braking device transmission the combination of components connecting the braking device control and the brakes the transmission may be mechanical, hydraulic, pneumatic, electrical or mixed. If the braking power is derived from, or assisted by, a source of energy independent of, but controlled by

27、, the driver, the reserve of energy in the device is regarded as part of the transmission 3.10.3 brake the element of the braking device in which the forces opposed to the motion or tendency to motion are produced 3.11 service braking device a device, the function of which is to reduce the speed of

28、a moving vehicle or to bring it to a haltBS6384:1983 BSI 10-1999 3 3.12 parking braking device assembly of parts by means of which the vehicle can be maintained at rest even on a slope and in the absence of the driver 3.13 retarder a device, the function of which is either to assist the service brak

29、ing device or to reduce the speed but not to stop the vehicle 3.14 over-run (inertia) braking device a braking device in which the energy needed to produce the braking force is generated by movement of the towed vehicle towards the towing vehicle 3.15 spring brake a braking device in which the energ

30、y required for braking is supplied by one or more springs acting as an energy accumulator 3.16 brake control input force the sum of all forces applied by the operator to the braking device control(s), measured at the point of load application, in a line from the point of application through the oper

31、ators hip joint for foot pedal controls, or through the arm to shoulder joint for hand operated controls 3.17 stopping distance the distance travelled by a vehicle between the point at which the first movement of the braking device control is made, and the point at which the vehicle comes to a halt

32、3.18 mean deceleration the average deceleration calculated from initial speed and stopping distance as defined by the formula where 3.19 measured deceleration the mean of the sustained deceleration recorded, for example, on a decelerometer 3.20 release pressure the pressure required, within the tran

33、smission system of a fluid or pneumatic released spring brake, to release the brakes fully 3.21 release force the force required, on the control of a mechanically released spring brake, to release the brakes fully 3.22 maximum design speed see ISO3965 4 General requirements The following general req

34、uirements shall be observed when performing the methods of test specified in this InternationalStandard. 4.1 A towing vehicle shall be fitted with components intended by the manufacturer for the operation of the towed vehicle braking devices if the latter affect the braking performance of the towing

35、 vehicle. 4.2 The vehicles condition, as regards mass, shall be as specified for each type of test and shall be recorded in the test report. 4.3 The test track or test site shall have a dry, clean concrete, bituminous or equivalent surface, affording good adhesion. 4.4 The test shall be performed wh

36、en the wind velocity is below10m/s. 4.5 The ambient temperature shall be within the range 10 Cto+35 C and shall be recorded. 4.6 The braked axle(s) shall be equipped with the largest diameter tyres specified by the vehicle manufacturer. The tyres shall be inflated to the pressure(s) specified by the

37、 vehicle manufacturer. 4.7 Prior to the start of a series of tests, the brakes shall have been fully bedded in (burnished) and adjusted in accordance with the manufacturers instructions. Thereafter, the brakes shall not be further manually adjusted during the same series of tests. At the start of ea

38、ch test, the brakes shall be cold. A brake is deemed to be cold if one of the following conditions is met: a) the temperature measured on the disc or on the outside of the drum is below100 C; b) in the case of totally enclosed brakes, including oil-immersed brakes, the temperature measured on the ou

39、tside of the housing is below50 C, or within the manufacturers specifications; c) the brakes have not been actuated in the previous1h. a is the average deceleration, in metres per second squared; v is the initial speed, in metres per second; s is the stopping distance, in metres.BS6384:1983 4 BSI 10

40、-1999 4.8 The performance of service braking devices shall be measured without locking of the wheels until the vehicle has come to a halt. 4.9 The requirements for measuring accuracy, given in the table, shall be observed when conducting tests. Table Requirements for measuring accuracy Measurement T

41、olerance,% Travel speed 3 Vehicle mass 3 Deceleration 3 Stopping distance 1 Brake control input force 5 Tyre inflation pressure 5 Brake system fluid (gas) pressures 5BS6384:1983 BSI 10-1999 5 Section 2. Determination of service brakes performance 5 Introduction This section specifies methods of meas

42、uring service brake performance based on measured deceleration (clause6) or measured stopping distance (clause7). In both cases, if more than one type of test is required, they shall be carried out in the following order: a) cold performance test type0 (see6.1.2, 6.2.2, 7.1.2 and7.2.2); b) fade test

43、 type1 (see6.1.3, 6.2.3, 7.1.3 and7.2.3); c) recovery test type3 (optional) (see6.1.4, 6.2.4, 7.1.4 and7.2.4); d) fade test type2 (where appropriate) (see6.1.5, 6.2.5, 7.1.5 and7.2.5); NOTEThis test applies only to vehicles having a maximum design speed exceeding35km/h and a maximum mass exceeding12

44、000kg. e) recovery test type3 (optional) (see6.1.6, 6.2.6, 7.1.6 and7.2.6). 6 Method based on measured deceleration 6.1 Procedure for agricultural tractors and self-propelled agricultural vehicles 6.1.1 General The temperature of the vehicle transmission and final drive shall be as indicated by the

45、manufacturer for transport. 6.1.2 Cold performance test Type0 6.1.2.1 Test conditions The test surface shall not have a longitudinal slope exceeding1%, nor a side slope exceeding3%. During the braking test, an unbraked axle, if capable of being declutched, shall not be connected with a braked axle.

46、In the case of a laden vehicle, the unbraked axle shall be loaded to its maximum axle load. For wheeled vehicles, the braked axle(s) wheels shall be fitted with the largest diameter tyres intended by the manufacturer for that vehicle type. For a vehicle braking on all wheels, the front axle shall be

47、 laden to its technically permissible maximum axle load. NOTEFor self-propelled agricultural vehicles, the masses and the axle loads shall be those specified by the manufacturer for transport. 6.1.2.2 Procedure With the laden vehicle travelling at its stabilized maximum design speed, or50km/h % if t

48、he design speed is more than50km/h, declutch the engine from the driven axles or, if that is not possible, move the engine speed control to the minimum engine speed position. NOTEAuxiliary retarder, variable ratio drive, or other auxiliary braking devices shall not be used in the brake tests unless

49、they are simultaneously actuated by the braking device control, or unless such retardation is automatic with normal braking procedure. A description and the use of such devices shall be noted in the test report. Immediately apply a constant force to the braking device control until the vehicle comes to a halt and measure the deceleration. Repeat the procedure for a series of different forces applied to the braking device control up to the maximum force which can be applied without locking of the wheels, or up to a maximum in