Standard No.:	JT/T 1178.2-2019
English Name:	Safety specification for commercial vehicle for cargos transportation—Part 2: Towing vehicle and trailer
Chinese Name:	营运货车安全技术条件 第2部分：牵引车辆与挂车
Chinese Classification:	T43    Truck
Professional Classification:	JT    Professional Standard - Transport
ICS Classification:	43.080.10 43.080.10    Trucks and trailers 43.080.10
Issued by:	Ministry of Transport
Issued on:	2019-03-15
Implemented on:	2019-7-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	13500 words
Price(USD):	330.0
Delivery:	via email in 1 business day

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. JT/T 1178 consists of two parts under the general title Safety specification for commercial vehicle for cargos transportation: ——Part 1: Goods vehicle; ——Part 2: Towing vehicle and trailer. This part is Part 2 of JT/T 1178. This part is developed in accordance with the rules given in GB/T 1.1-2009. This part was proposed by the Department of Transport Services of the Ministry of Transport. This part is under the jurisdiction of the National Technical Committee on Road Transport of Standardization Administration of China (SAC/TC 521). Safety specification for commercial vehicle for cargos transportation Part 2: Towing vehicle and trailer 1 Scope This part of JT/T 1178 specifies the safety technical requirements and test methods for the complete vehicle, brake system, safety protection, mechanical connection, pneumatic and electrical connection, load arrangement identification and fastening point, alarm and prompt for towing vehicle and trailer. This part is applicable to N2 and N3 towing vehicles, and O3 and O4 trailers and their combination. 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 1589 Limits of dimensions, axle load and masses for motor vehicles, trailers and combination vehicles GB/T 3730.1 Motor vehicles and trailers—Types—Terms and definitions GB/T 3730.2 Road vehicle - Masses - Vocabulary and codes GB 4094 Symbols for controls, indicators and tell-tales of motor vehicles GB/T 4606 Road vehicles—50 semi-trailer fifth wheel coupling pin—Basic and mounting/interchangeability dimensions GB/T 4781 Commercial road vehicles—50mm drawbar eye—Interchangeability GB 4785 Prescription for installation of the external lighting and light-signalling devices for motor vehicles and their trailers GB/T 5053.1-2006 Road vehicles—Connectors for the electrical connection of towing and towed vehicles—7-pole connector type 24 N (normal) for vehicles with 24 V nominal supply voltage GB/T 5922 Motor vehicles and towed vehicles—Pressure test connection for compressed-air pneumatic braking equipment GB/T 6323-2014 Controllability and Stability Test Procedure for Automobile GB 7258-2017 Technical specifications for safety of power-driven vehicles operating on roads GB 11567 Motor vehicles and trailers-lateral and rear underrun protection requirements GB/T 12534 Motor vehicles—General rules of road test method GB 12676 Technical requirements and testing methods for commercial vehicle and trailer braking systems GB/T 13594 Antilock braking performance and test procedure for motor vehicles and their trailers GB/T 13880 Road vehicles—Fifth wheels—Interchangeability GB/T 13881 Pneumatic braking connections between motor vehicles and towed vehicles GB/T 14172 Static roll stability test method for motor vehicles GB 15084 Motor vehicles—Devices for indirect vision—Requirements of performance and installation GB/T 15087 Road vehicles—Drawbar couplings and eyes for hinged drawbars—Strength tests GB/T 15088 Road vehicles—Fifth wheel kingpins —Strength test GB/T 15089 Classification of power-driven vehicles and trailers GB/T 17619 Limits and methods of testing for immunity of electrical/electronic sub-assemblies in vehicles to electromagnetic radiation GB/T 18655 Vehicles boats and internal combustion engines - Radio disturbance characteristics—Limits and methods of measurement for the protection of on-board receivers GB 19239 Mounting requirements of special equipment for gas vehicle GB/T 20069 Road vehicle—Fifth wheel couplings strength tests GB/T 20716.1 Road vehicles—Connectors for the electrical connection of towing and towed vehicles—Part 1: Connectors for braking systems and running gears of vehicles with 24V nominal supply voltage GB/T 20717 Road vehicles—Connectors for the electrical connection of towing and towed vehicles—15-pole connector for vehicles with 24V nominal supply voltage GB/T 22309 Road vehicles—Brake linings—Shear test procedure for disc break pad and drum brake shoe assemblies GB/T 22311 Road vehicles—Brake linings—Compressive strain test method GB/T 25088 Road vehicles—Connectors for the electrical connection of towing and towed vehicles—7-pole connector type 24S (supplementary) for vehicles with 24 V nominal supply voltage GB/T 25979 Road vehicles—Heavy commercial vehicle combinations and articulated buses—Lateral stability test methods GB 25990 Rear-marking plates for vehicles and their trailers GB 26149 Performance requirements and test methods of tire pressure monitoring system for passenger cars GB 26511 Front underrun protective requirements for commercial vehicle GB/T 26774 Technical specification for car carriers GB/T 26777 Semitrailer landing gears GB 29753 Safety requirements and test methods for refrigerating van for transporting food and biological products on road GB/T 31083 Technical requirements of tie-down used in passenger car for road transportation GB/T 31879 Road vehicles—General technical requirements for fifth wheel GB/T 32692 Performance test methods for endurance braking systems of commercial vehicles GB/T 32860 Road vehicles—Interchangeability of drawbar couplings GB/T 32861 Road vehicles—Location of electrical and pneumatic connections between towing vehicles and trailers GB/T 33577 Intelligent transportation systems—Forward vehicle collision warning systems—Performance requirements and test procedures GB/T 35782-2017 Specification for swap trailer transport of road vehicles GB/T 36883-2018 Technical specification of LNG vehicle JT/T 230 Rubber belt of electrostatic conductivity JT/T 389 Specification for van trailers JT/T 475 Trailer axle JT/T 719 Limits and measurement methods of fuel consumption for commercial vehicle for cargos transportation JT/T 794 GNSS system for operating vehicles—Technical specification for vehicle terminals JT/T 882-2014 Technical requirements of cargo loading-unloading and securement for swap trailer transport JT/T 883 Commercial vehicle driving dangerous warning system——Technical requirements and test procedures JT/T 884 Commercial vehicle anti-rolling stability test method—Steady circle test JT/T 1046 Explosion suppression safety technique requirements for road transportation vehicle fuel tank and liquid fuel transportation tank JT/T 1094-2016 Safety specifications for commercial bus JT/T 1178.1-2018 Safety specification for commercial vehicle for cargos transportation –Part 1: Goods vehicle JT/T 1242-2019 Performance requirements and test procedures for advanced emergency braking system of commercial vehicle QC/T 200 Performance requirements and test methods of reservoir for air brake equipment of automobile and trailer QC/T 480 Criterion thresholds and evaluation of controllability and stability for automobiles ISO 12357-1 Commercial toad vehicles—Drawbar couplings and eyes for rigid drawbars—Part 1:Strength tests for general cargo centre-axle trailers 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 3730.1, GB/T 3730.2, GB 4094, GB/T 6323, GB/T 15089, GB/T 26774 and JT/T 1178.1 as well as the following apply. 3.1 towing vehicle vehicles used for towing trailers including semi-trailer towing vehicle and towing trucks. 3.2 towing truck trucks with special devices for towing draw bar trailer and centre-axle trailer. Note: It is derived from JT/T 719-2016, 3.2. 3.3 centre-axle trailer trailers where the towing device cannot move vertically (relative to the trailer) and the axle of the trailer is located close to the center of gravity of the trailer (in the case of uniform load). The vertical static load acting on the towing truck shall not exceed 10% or 10,000 N (whichever is smaller) of the maximum design total mass of the trailer. Note: It is derived from GB/T 3730.1-2001, 2.2.3. 3.4 draw bar trailer full trailer trailers with at least two shafts, one of which is rotatable and connected with a towing truck through a draw bar moving in an angular direction; the draw bar can move vertically and is connected to the vehicle without bearing any vertical force. Note: It is derived from GB/T 3730.1-2001, 2.2.1. 3.5 articulated vehicle semi-trailer vehicle combination combination of semi-trailer towing vehicle and semitrailer. Note: It is derived from GB 7258-2017, 3.4.3. 3.6 centre axle trailer combination combination of towing truck and centre-axle trailer. Note: It is derived from GB 7258-2017, 3.4.2.2. 3.7 draw bar trailer combination combination of towing truck and draw bar trailer. Note: It is derived from GB 7258-2017, 3.4.2.1. 3.8 tire pressure monitoring system TPMS the system consisting of tire pressure monitoring module, receiver module and display module, installed on the vehicle for monitoring tire pressure, temperature, etc. in real time, and displaying and alarming with visual and auditory signals. Note: It is derived from GB 26149-2017, 3.1. 4 Complete vehicle 4.1 The specific power of the towing vehicle and trailer in a combination state (except battery electric vehicle) shall meet the requirements of Table 1. Table 1 Specific power limits Maximum allowable total mass G (kg) G≤18,000 18,000

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Complete vehicle 5 Brake system 6 Safety protection 7 Mechanical connection 8 Pneumatic and electrical connection 9 Load arrangement identification and lashing point 10 Alarm and prompt 11 Transition period for standard implementation Annex A (Informative) Examples of information nameplates for vehicle interchangeability Annex B (Normative) Technical requirements and test methods for tire pressure monitoring system (TPMS) Annex C (Normative) Test method for strength of draw bar coupling mounting bracket and draw bar eye rigid connecting rod of centre axle trailer combination Annex D (Informative) Drawing and example of load arrangement identification curve Bibliography