Standard No.:	GB 14622-2026
English Name:	Limits and measurement methods for emissions from motorcycles (CHINA V)
Chinese Name:	摩托车污染物排放限值及测量方法 （中国第五阶段）
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2026-02-27
Implemented on:	2029-1-1
Status:	valid
Superseding:	GB 14622-2016 Limits and Measurement Methods for Motorcycle Pollutant Discharge (China stage IV) GB 18176-2016 Limits and measurement methods for emissions of pollutants from mopeds(CHINA IV)
Target Language:	English
File Format:	PDF
Word Count:	89500 words
Translation Price(USD):	3000.0
Delivery:	via email in 1~5 business day

ICS 13. 040. 50 CCS Z 64 National Standard of the People’s Republic of China GB 14622-2026 Replaces GB 14622-2016, GB 18176-2016 Limits and measurement methods for emissions from motorcycles (CHINA V) 摩托车污染物排放限值及测量方法 (中国第五阶段) (English translation) Issue date: 2026-02-12 Implementation date: 2029-01-01 Issued by the Ministry of Ecology and Environment of the People's Republic of China the State Administration for Market Regulation of the People's Republic of China Limits and measurement methods for emissions from motorcycles (CHINA V) 1 Scope of application This standard specifies the emission limits and measurement methods for exhaust emissions and evaporative emissions from motorcycles and mopeds fitted with spark-ignition engines, as well as the requirements for crankcase emissions, the durability requirements for pollution control devices, and the technical requirements and measurement methods for on-board diagnostic (OBD) systems. This standard specifies the emission limits and measurement methods for exhaust emissions from motorcycles and mopeds fitted with compression-ignition engines, as well as the durability requirements for pollution control devices and the technical requirements and measurement methods for on-board diagnostic (OBD) systems. This standard specifies the requirements and methods for type test of motorcycles and mopeds (hereinafter referred to as vehicles), as well as the inspection and judgment methods for production conformity, in-service conformity and end-of-line inspection. This standard applies to motorcycles and mopeds fitted with spark-ignition or compression-ignition engines, and also applies to hybrid electric motorcycles and hybrid electric mopeds. 2 Normative references The following documents, or the provisions thereof, are referred to in this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies. For other documents that are abolished, revised or revised by new documents, the new ones shall apply to this standard. GB 3847-2018 Limits and measurement methods for emissions from diesel vehicles under free acceleration and lugdown cycle GB 15365 Symbols for controls, indicators and tell-tales for motorcycles and mopeds GB 18285-2018 Limits and measurement methods for emissions from gasoline vehicles under two-speed idle conditions and short driving mode conditions GB/T 13554 High efficiency particulate air filter GB/T 15089 Classification of power-driven vehicles and trailers GB/T 19001 Quality management systems - Requirements GB/T 39851.3 Road vehicles - Diagnostic communication over Controller Area Network (DoCAN) - Part 3 : Requirements for emissions-related systems GB/T 40822 Road vehicles - Unified diagnostic services GB/T 41590.4 Road vehicles - Diagnostic communication over K-Line (DoK-Line) - Part 4 : Requirements for emission-related systems GB/T 42193 Road vehicles - Communication between vehicle and external equipment for emissions-related diagnostics GB/T 43258.2 Road vehicles—Diagnostic communication over Internet Protocol(DoIP) - Part 2:Transport protocol and network layer services GB/T 46741 Diagnostic connector of motorcycles and mopeds HJ 1350 Technical specification for vehicle environmental information disclosure QC/T 1003 Determination of precious metal in metal support catalytic converter for motorcycles 3 Terms and definitions For the purposes of this standard, the following terms and definitions apply: 3.1 vehicle of category L₁, L₂, L₃, L₄ and L₅ vehicle of category L₁, L₂, L₃, L₄ and L₅ meeting GB/T 15089 3.2 motorcycle vehicle of category L₃, L₄ and L₅ meeting GB/T 15089 3.3 moped vehicle of category L₁ and L₂ meeting GB/T 15089 3.4 vehicle of category I including vehicle of category L₁ and L₂ 3.5 vehicle of category II including vehicle of category L3 and L4 except for those L5 vehicles belonging to category III 3.6 vehicle of category III motorcycle equipped with two rear wheels symmetrically arranged with respect to the front wheel, designed and manufactured to carry cargo or no more than two passengers (excluding the driver), and having a maximum design speed lower than 70 km/h, belonging to category L₅ 3.7 type test final test carried out on a newly trial-produced vehicle model after its design is completed, in order to verify whether the vehicle meets the technical requirements of this standard 3.8 hybrid electric motorcycle and moped (HEM) vehicle that is able to obtain power from at least the following two types of on-board energy storage devices: - consumable fuel; - rechargeable energy storage device. 3.9 bi-fuel vehicle vehicle that can run on either gasoline or a gaseous fuel, but not both simultaneously 3.10 mono-fuel gas vehicle vehicle that can run on only one type of gaseous fuel (LPG or NG), or a vehicle that can run on one type of gaseous fuel (LPG or NG) and gasoline, provided that gasoline is used only for emergency purposes or for engine starting, and the fuel tank capacity does not exceed 1 L 3.11 reference mass kerb mass of the vehicle plus 75 kg 3.12 equivalent inertia mass equivalent to the translational and rotational inertia of the vehicle during driving, simulated by an inertia simulator on a chassis dynamometer 3.13 exhaust emissions gaseous pollutants and particulate matters emitted from the vehicle through its exhaust pipe 3.14 gaseous pollutants including gaseous emissions such as carbon monoxide (CO), nitrogen oxides [NOx, NOx expressed as equivalent nitrogen dioxide (NO₂)], and hydrocarbons (HC, e.g. total hydrocarbons (THC), non‑methane hydrocarbons (NMHC)] The hydrocarbon composition is assumed to have the following carbon‑hydrogen ratio: - gasoline: C₁H1.85; - diesel: C₁H1.86; - LPG: C₁H₂.525; - NG: CH₄. 3.15 non-methane hydrocarbons (NMHC) total hydrocarbon (THC) compounds other than methane (CH₄) 3.16 total hydrocarbons (THC) all volatile compounds that can be measured by a flame ionization detector (FID) 3.17 particulate matter (PM) solid components collected using a specified filter paper in the diluted exhaust gas at a maximum temperature of 52 °C, according to the test method described in Annex C 3.18 evaporative emissions hydrocarbon vapours lost from the fuel (petrol) system other than exhaust emissions from the vehicle, including: a) Diurnal loss: Hydrocarbons (expressed as C₁H₂.₃₃ equivalent) emitted due to temperature changes in the fuel tank b) Hot soak loss: Hydrocarbons (expressed as C₁H₂.₂₀ equivalent) emitted from the fuel (petrol) system when the vehicle is parked after a period of operation. 3.19 crankcase emissions gaseous pollutants discharged into the atmosphere from openings in the engine crankcase ventilation system or lubrication system 3.20 cold start device device that temporarily enriches the air/fuel mixture to facilitate engine starting 3.21 starting aid device device that assists engine starting without enriching the air/fuel mixture, such as glow plugs, altering injection or ignition timing, etc. 3.22 engine displacement for reciprocating piston engines, the total swept volume of the engine cylinders; for rotary engines, twice the total swept volume of the engine cylinders 3.23 maximum speed maximum speed at which the vehicle can run stably after the acceleration process is completed (i.e., the speed no longer increases) with the transmission in the highest gear and the throttle fully opened 3.24 pollution control devices emission control system, referring to the devices and associated control programs on the vehicle that control or limit pollutant emissions, as well as on‑board emission diagnosis and monitoring Including, but not limited to three‑way catalyst (TWC), diesel oxidation catalyst (DOC), particulate matter trap (e.g., DPF, GPF, etc.), activated carbon canister, LPG/NG fuel injection unit, on‑board diagnostic system (OBD), electronic control unit (ECU) software and hardware, sensors, actuators, etc. 3.25 onboard diagnostic system (OBD) system capable of identifying the area of a malfunction and storing this information in the ECU memory in the form of malfunction codes 3.26 malfunction indicator light (MIL) indicator light that notifies the vehicle driver when an emission‑related component or the OBD itself experiences a malfunction 3.27 misfire phenomenon in which combustion does not occur in a cylinder of the engine due to ignition failure, over‑lean mixture, insufficient compression pressure, or any other cause 3.28 defeat device device that, by measuring, sensing, or responding to operating parameters such as vehicle speed, engine speed, transmission gear, temperature, altitude, intake manifold vacuum, etc., (1) activates, adjusts, delays, or stops the operation of a component or the function of the emission control system, thereby reducing the effectiveness of the emission control system under normal vehicle use conditions; or (2) identifies test conditions and activates, adjusts, or enhances the operation of a component or the function of the emission control system 3.29 fuel Type of fuel normally used by the engine: - petrol - LPG - NG - petrol and LPG - petrol and NG - diesel Liquid fuel refers to petrol or diesel, and gas fuel refers to LPG or NG. 3.30 diluted gases uniform mixture obtained by diluting the vehicle's exhaust with air 3.31 operating mode at normal idling speed or at high idling speed operating mode at normal idling speed refers to the state where the engine operates stably at the lowest speed without load, i.e., the engine is running normally, the transmission is in neutral, the throttle control is at the minimum position, the choke is fully open, and the engine speed complies with the technical documentations of the manufacturer operating mode at high idling speed refers to the state where the engine is running normally, the transmission is in neutral, the choke is fully open, and the engine speed is stably controlled by adjusting the throttle control to the high idle speed (not less than 2000 r/min) specified in the manufacturer's technical documentation. If the technical documentation does not specify such a speed, the high idle speed shall be controlled at 2500 r/min ± 250 r/min For vehicles with automatic transmission, the drive wheels shall be in a free state. 3.32 useful life durability mileage or time limit specified in this standard that a vehicle shall achieve under normal operating conditions, whichever comes first

Contents Foreword II 1 Scope of application 2 Normative references 3 Terms and definitions 4 Pollution control requirements 5 Type test requirements 6 Type test extension 7 Production conformity 8 In-service conformity 9 End-of-line inspection 10 Implementation of the standard Annex A (Normative) Type test vehicle parameters Annex B (Informative) Requirements for content of type test report Annex C (Normative) Exhaust emission test after cold start at ambient temperature (Type I test) Annex D (Normative) Two-speed idle test or free acceleration smoke test (Type II test) Annex E (Normative) Crankcase emission test (Type III test) Annex F (Normative) Evaporative emission test (Type IV test) Annex G (Normative) Durability test of pollution control devices (Type V test) Annex H (Normative) On-board diagnostic (OBD) system Annex I (Normative) Greenhouse gas emission test Annex J (Normative) Emission control requirements and measurement methods for hybrid electric vehicles Annex K (Normative) Technical requirements for reference fuels Annex L (Normative) Production conformity assurance requirements Annex M (Normative) In-service conformity ……………………………………………………………………… Annex N (Normative) Requirements for extension of type test