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BSI 22/30392403 DC 2022

$24.66

BS ISO 16750-3. Road vehicles. Environmental conditions and testing for electrical and electronic equipment – Part 3. Mechanical loads

Published By Publication Date Number of Pages
BSI 2022 126
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PDF Catalog

PDF Pages PDF Title
9 Foreword
11 1 Scope
2 Normative references
12 3 Terms and definitions
4 Tests and requirements
4.1 Vibration
4.1.1 Testing conditions during the vibration test
4.1.1.1 General
13 4.1.1.2 Overlaid temperature cycles during vibration testing
4.1.1.2.1 General
14 4.1.1.2.2 Temperature profile for small and lightweight components not mounted on the combustion engine
16 4.1.1.2.3 Temperature profile for large and heavy components not mounted on the combustion engine
18 4.1.1.2.4 Temperature profile for components mounted on the combustion engine
19 4.1.2 Test Ia – Passenger car, combustion engine, small and lightweight DUT
4.1.2.1 Purpose
20 4.1.2.2 Test
4.1.2.2.1 General
4.1.2.2.2 Sinusoidal vibration
21 4.1.2.2.3 Random vibration
22 4.1.2.3 Requirement
4.1.3 Test II — Passenger car, gearbox attached to a combustion engine, small and lightweight DUT
4.1.3.1 Purpose
23 4.1.3.2 Test
4.1.3.2.1 General
4.1.3.2.2 Sinusoidal vibration
24 4.1.3.2.3 Random vibration
25 4.1.3.3 Requirement
4.1.4 Test VI — Commercial vehicle, combustion engine and gearbox, small and lightweight DUT
4.1.4.1 Purpose
4.1.4.2 Test
4.1.4.2.1 General
4.1.4.2.2 Sinusoidal vibration
26 4.1.4.2.3 Random vibration
28 4.1.4.3 Requirement
4.1.5 Test XIII — Passenger car, hybrid-electric powertrain, combustion engine and gearbox, large and heavy DUT
4.1.5.1 Purpose
29 4.1.5.2 Test
4.1.5.2.1 General
4.1.5.2.2 Sine-on-random vibration
4.1.5.2.2.1 General
4.1.5.2.2.2 Sinusoidal vibration part
30 4.1.5.2.2.3 Random vibration part
31 4.1.5.2.3 Random vibration
32 4.1.5.3 Requirements
4.1.6 Test XV — Passenger car, driving electric motor
4.1.6.1 Purpose
33 4.1.6.2 Test
4.1.6.2.1 General
4.1.6.2.2 Random vibration
34 4.1.6.3 Requirements
35 4.1.7 Test XX — Commercial vehicle, driving electric motor
4.1.7.1 Purpose
4.1.7.2 Test
4.1.7.2.1 General
4.1.7.2.2 Random vibration
36 4.1.7.3 Requirements
37 4.1.8 Test IV — Passenger car, sprung masses (vehicle body), small and lightweight DUT
4.1.8.1 Purpose
4.1.8.2 Test
38 4.1.8.3 Requirement
4.1.9 Test VII — Commercial vehicle, sprung mass (vehicle body), small and lightweight DUT
4.1.9.1 Purpose
4.1.9.2 Test
39 4.1.9.3 Requirement
40 4.1.10 Test XIV — Hybrid-electric/fully-electric passenger car, sprung mass (vehicle body), large and heavy DUT
4.1.10.1 Purpose
4.1.10.2 Test
4.1.10.2.1 General
4.1.10.2.2 Random vibration
41 4.1.10.3 Requirements
42 4.1.11 Test XVI — Hybrid-electric/fully-electric commercial vehicle, sprung mass (vehicle body), large and heavy DUT
4.1.11.1 Purpose
4.1.11.2 Test
4.1.11.2.1 General
4.1.11.2.2 Random vibration
43 4.1.11.3 Requirements
4.1.12 Test V — Passenger car, unsprung mass (wheel, wheel suspension), small and lightweight DUT
4.1.12.1 Purpose
4.1.12.2 Test
44 4.1.12.3 Requirement
45 4.1.13 Test IX — Commercial vehicle, unsprung mass, small and lightweight DUT
4.1.13.1 Purpose
4.1.13.2 Test
46 4.1.13.3 Requirement
4.1.14 Test VIII — Commercial vehicle, decoupled cab
4.1.14.1 Purpose
4.1.14.2 Test
48 4.1.14.3 Requirement
4.1.15 Test III — Passenger car, flexible plenum chamber
4.1.15.1 Purpose
4.1.15.2 Test
49 4.1.15.3 Requirement
4.1.16 Test XI — Passenger car, solid intake manifold
4.1.16.1 Purpose
4.1.16.2 Test
4.1.16.2.1 General
4.1.16.2.2 Sinusoidal vibration
50 4.1.16.2.3 Random vibration
51 4.1.16.3 Requirement
4.1.17 Test Ib – Rotating machines
4.1.17.1 Purpose
52 4.1.17.2 Test
4.1.17.2.1 General
53 4.1.17.2.2 Sinusoidal vibration
54 4.1.17.2.3 Random vibration
55 4.1.17.3 Requirement
4.1.18 Test XII — Passenger car, exhaust pipe
4.1.18.1 Purpose
4.1.18.2 Test conditions
4.1.18.2.1 Test conditions XIIa: valid for small and lightweight sensors with natural frequencies > 1000 Hz
56 4.1.18.2.2 Test conditions for XIIb: valid for modules, mounted before the decoupling element
4.1.18.2.3 Test conditions for XIIc: valid for modules, mounted behind the decoupling element
57 4.1.18.2.3.1 Test – General, for XIIc
4.1.18.2.3.2 Sinusoidal vibration for XIIc
4.1.18.2.3.3 Random vibration for XIIc
58 4.1.18.3 Requirement
59 4.1.19 Test X — Passenger car, components on fuel rail (gasoline engine with GDI-system)
4.1.19.1 Purpose
4.1.19.2 Test
4.1.19.2.1 General
4.1.19.2.2 Sinusoidal vibration
60 4.1.19.2.3 Random vibration
61 4.1.19.3 Requirement
4.2 Mechanical shock
4.2.1 Shock I — Test for devices in or on doors and flaps on passenger cars
4.2.1.1 Purpose
4.2.1.2 Test
62 4.2.1.3 Requirement
4.2.2 Shock II — Test for devices on rigid points on the body and on the frame
4.2.2.1 Purpose
4.2.2.2 Test
4.2.2.3 Requirements
4.2.3 Shock III — Test for devices in or on the gearbox
4.2.3.1 Purpose
63 4.2.3.2 Test
4.2.3.3 Requirements
4.3 Free fall
4.3.1 Purpose
64 4.3.2 Test
4.3.2.1 Free fall with guidance of DUT
4.3.2.2 Free fall without guidance of DUT
65 4.3.3 Selection of drop height
4.3.4 Requirements
4.4 Surface strength/scratch and abrasion resistance
4.4.1 Purpose
66 4.4.2 Test Method
4.4.3 Requirements
4.5 Gravel bombardment
4.5.1 Purpose
4.5.2 Test method
4.5.3 Requirements
67 5 Code letters for mechanical loads
69 6 Documentation
70 Annex A (informative) Guidelines for the development of test profiles for vibration tests
A.1 Scope
A.2 General
73 A.3 Average control method
75 A.4 Method for determining the vibration profile and test duration on/in powertrain
76 A.4.1 General aspects regarding test duration
A.4.2 Test duration, example for ICE without any electric propulsion
79 A.4.3 Test duration, example for PHEVs
81 A.4.4 Verification of load in combustion engine speed distribution
A.4.4.1 Procedure
82 A.4.4.1.1 Measurement of acceleration levels with a combustion engine speed increase on the chassis dynamometer
A.4.4.1.2 Determination of the load distribution from the measured time history (cycle counting method)
83 A.4.4.1.3 Analysis of the number of cycles in the classed acceleration levels and combustion engine speeds
84 A.4.4.1.4 Verification of the dominant load from the high combustion engine speed range
85 A.4.5 Sources for vibration in an SoR profile for powertrain-mounting
86 A.5 Method for determining the vibration profile and test duration for DUT mounted on the body
A.5.1 General
A.5.1.1 Enveloping vibration profile
A.5.1.2 Test duration
87 A.5.2 Verification of the shortened test duration using fatigue calculation
A.5.2.1 General
A.5.2.2 Procedure
88 A.5.2.3 Test parameters for random vibration
A.5.2.4 Acceleration distributions of random vibration test and vehicle driving
90 A.5.2.5 Comparative verification between random test and driving stress
A.5.2.6 Calculation of the fatigue limits
93 A.6 Test duration for a sinusoidal test not governed by an engine speed distribution
94 A.7 Test duration with an infinite-life approach for car-body-mounted DUTs
96 A.8 The explanation for Basquin model
97 A.8.1 General
A.8.2 Outline
A.8.3 Calculation example
100 A.9 Vibration test profiles developed in ISO 19453
A.9.1 Background
A.9.2 Vibration profiles for Test XIII (Passenger car, hybrid-electric powertrain, large and heavy DUT)
A.9.2.1 Sine on random vibration test
104 A.9.2.2 Random vibration test
106 A.9.3 Vibration profiles for Test XIV (Hybrid-electric/fully electric passenger car, sprung mass (vehicle body), large and heavy DUT)
108 A.9.4 Vibration profiles for Test XV (Passenger car, driving electric motor)
109 Figure A.19 — PSD of acceleration versus frequency
110 Table A.20 — Values for PSD and frequency
111 Annex B (informative) Recommended mechanical requirements for equipment depending on the mounting location
113 Annex C (informative) Guidelines for shaker testing of starter motors, alternators and similar DUTs
C.1 Test setup for Alternators and Integrated Starter Generators
114 C.2 Test setup for starter motors
115 C.3 Vibration test profile validation process for dynamically coupled, engine mounted components
120 Annex D (informative) Guidelines for free fall testing
D.1 Best practice example for choice of DUT orientation
121 D.2 Further information on the drop height
D.3 Characteristics of the impact surface
123 Annex E (informative) 3D vibration testing for automotive components
E.1 Motivation
E.2 Profile derivation for random vibration tests
124 E.3 Difference in uniaxial and multiaxial fatigue for body parts under realistic random excitation
126 Bibliography
BSI 22/30392403 DC 2022
$24.66