Standard No.:	QC/T 301-2014
English Name:	Technical requirements and test methods for motor vehicles power cylinder
Chinese Name:	汽车转向助力缸技术要求和试验方法
Chinese Classification:	T23    Steering and operation systems
Professional Classification:	QC    Professional Standard - Automobile
ICS Classification:	43.040.50 43.040.50    Transmissions, suspensions 43.040.50
Issued by:	Ministry of Industry and Information Technology
Issued on:	2014-05-06
Implemented on:	2014-10-1
Status:	valid
Superseding:	QC/T 302-1999 Bench test method for automobile power steering cylinder QC/T 301-1999 Specifications for power steering cylinder of automobile
Language:	English
File Format:	PDF
Word Count:	3500 words
Price(USD):	105.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the technical requirements and test methods for motor vehicles power cylinder. This standard is applicable to independent power cylinders in hydraulic power steering devices of motor vehicles. 2 Normative references The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 5179 Motor vehicle - Steering system - Terms and definitions GB/T 17446 Fluid power systems and components - Vocabulary QC/T 484 Automobiles - Paint coating QC/T 572 Rules for cleanliness of automobile - Determination method 3 Terms and definitions For the purposes of this standard, the terms and definitions given in GB/T 5179 and GB/T 17446 and the following apply. 3.1 maximum operating pressure pmax maximum pressure borne by the power cylinder during operation, in MPa 3.2 minimum breakaway pressure minimum pressure required for the start of power cylinder, in MPa 3.3 maximum stroke displacement distance of power cylinder piston from one limit position to another limit position 3.4 load efficiency ratio of actual output force to theoretical output force 3.5 minimum compression length minimum length between the connecting centers at both ends of the power cylinder 4 Technical requirements 4.1 General requirements The design drawings or technical documents of products shall be indicated with:

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Technical requirements 5 Test methods