GB 20074-2017External projections for motorcycles and mopeds (English PDF)

Foreword

All technical contents of this Standard are mandatory.

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard replaces GB 20074-2006 "External projections from motorcycles and mopeds". Compared with GB 20074-2006, the main technical changes in this Standard are as follows.

- modified the application scope of the standard;

- modified the normative references;

- deleted the definitions of 3.1~3.5, 3.7~3.9 in GB 20074-2006;

- added the definitions of "contact angle alpha, stem, plate, R point, group 1 parts, group 2 parts" (see 3.3~3.7 in this Standard);

- deleted the content of Clause 4 in GB 20074-2006;

- adjusted A.1 of Annex A in GB 20074-2006 as Clause 4 of this Standard and modified;

- adjusted A.2, A.4, A.5 of Annex A in GB 20074-2006 as 5.1 of this Standard; specified the requirements for external projections for two- wheeled motorcycle, and added technical requirements;

- modified the test procedures in A.3.2 of GB 20074-2006 (see A.3 Test procedures of this Standard);

- modified the content of A.3.1.2 of GB 20074-2006 (see A.2 Test conditions of this Standard);

- added "5.2 Technical requirements for external projections for tricycle" in this Standard;

- modified Figure A.1 (see Figure 1 of this Standard);

- refined the dimensional requirements for measuring instrument shown in Figure A.2 (see Figure A.1 of this Standard);

- adjusted A.2.4 of GB 20074-2006 as 5.2.1.2 of this Standard, and specified the technical requirements;

- added Figure 2 and Figure 4 in this Standard;

- deleted A.2.5 of GB 20074-2006;

1 Scope

This Standard specifies the classification criteria, general requirements, special requirements and classification test methods of external projections for motorcycles and mopeds.

This Standard is applicable to motorcycles and mopeds (hereinafter referred to as the motorcycle).

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB 11566, External projections for passenger car

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

5 Technical requirements

5.2.2.2 For the right tricycle that can clearly see the front forks, wheels, bumpers, fenders, shrouds, trunks and other components, the manufacturer can choose whether the tricycle meets the requirements of GB 11566 or 5.1. And the manufacturer shall explain in the corresponding technical documents.

5.2.2.3 For the right tricycle used for cargo carrying, when it is behind the rear cab bulkhead or it has no rear cab bulkhead, at all accessible edges at the rear of the transverse vertical plane passing 500 mm from R point in the rearmost seat, if the height of protrusion is not less than 1.5 mm, it shall be reversed.

5.2.2.4 In the consistency check, the number plate shall be dismantled. The space or plane for number plate installation shall meet the requirements.

6 Standard implementation

For newly certified vehicle models, it shall be implemented from the date of implementation of this Standard. For the vehicle models on production, it shall be implemented one year after the date of issuance and implementation of this Standard.