Standard No.:	GB/T 37322-2026
English Name:	Evaluation of gasoline cleanliness—Simulation test method for intake valve deposit (IVD) on gasoline engine
Chinese Name:	汽油清净性评价 汽油机进气阀沉积物模拟试验法
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR, SAC
Issued on:	2026-03-31
Implemented on:	2026-10-1
Status:	to be valid
Superseding:	GB/T 37322-2019 Test method for evaluating gasoline cleanliness-Simulation test of intake valve deposit(IVD)of gasoline engine
Target Language:	English
File Format:	PDF
Word Count:	10500 words
Translation Price(USD):	315.0
Delivery:	via email in 1~5 business day

GB/T 37322-2026 Evaluation of gasoline cleanliness—Simulation test method for intake valve deposit (IVD) on gasoline engine English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS National Standard of the People's Republic of China ‌GB/T 37322-2026 Evaluation of gasoline cleanliness - Simulation test method for intake valve deposit (IVD) on gasoline engine 汽油清净性评价 汽油机进气阀沉积物模拟试验法 Issue date: 2026-03-31 Implementation date: 2026-10-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword Introduction 1 Scope 2 Normative References 3 Terms and Definitions 4 Method Summary 5 Test Conditions 6 Apparatus 7 Reagents and Materials 8 Preparation 9 Test Procedure 10 Calculation 11 Precision 12 Test Report Gasoline cleanliness evaluation — Simulated test method for intake valve deposits of gasoline engines WARNING — This document may involve hazardous materials, equipment and operations, but does not claim to address all possible safety concerns. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions specified by relevant national regulations. 1 Scope This document describes a simulated test method for intake valve deposits using a port fuel injection gasoline engine, to evaluate the tendency of intake valve deposit formation in gasoline engines. This document applies to the evaluation of the cleanliness of motor gasoline and motor gasoline detergent. 2 Normative References The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 503 Motor gasoline — Determination of octane number — Motor method GB/T 1884 Crude petroleum and liquid petroleum products — Laboratory determination of density — Hydrometer method GB/T 1885 Petroleum measurement tables GB/T 4756 Petroleum liquids — Manual sampling GB/T 5487 Motor gasoline — Determination of octane number — Research method GB/T 6536 Determination of distillation characteristics of petroleum products GB/T 8017 Determination of vapour pressure of petroleum products — Reid method GB/T 8019 Determination of gum content of fuels — Jet evaporation method GB/T 11132 Liquid petroleum products — Determination of hydrocarbon types — Fluorescent indicator adsorption method GB 17930 Motor gasoline GB/T 19230.6 Test method for evaluating the effectiveness of gasoline detergent — Part 6: Engine dynamometer test method for evaluating the tendency of gasoline detergent to cause intake valve and combustion chamber deposits of gasoline engines (M111 method) GB 19592 Motor gasoline detergent GB/T 28768 Determination of hydrocarbon types and oxygenates in motor gasoline — Multidimensional gas chromatography GB/T 30519 Determination of hydrocarbon types and benzene content in light petroleum distillates and products — Multidimensional gas chromatography NB/SH/T 0663 Determination of alcohols and ethers content in gasoline — Gas chromatography SH/T 0604 Crude petroleum and petroleum products — Determination of density — Oscillating Utube method SH/T 0720 Determination of oxygenates in gasoline — Gas chromatography with oxygen selective flame ionization detection SH/T 0794 Determination of vapour pressure of petroleum products — Micro method 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 intake valve deposit All substances deposited on the surface of the intake valve. NOTE: Includes substances generated from fuel, lubricating oil and additives, as well as substances drawn in from external sources. 3.2 calibration reference detergent A gasoline detergent that is added to a reference base fuel in a specified amount to produce a given mass of deposit. NOTE: Used for calibrating the dosage of deposit accelerant. 3.3 deposit accelerant A substance that, under conditions of high temperature and oxygen, promotes the rapid formation of deposits on metal surfaces similar to those on intake valves after longterm engine operation. 4 Method Summary Under specified test conditions, a measured quantity of test sample is mixed with air through a nozzle and sprayed onto a heated deposit collector to simulate the formation of intake valve deposits in a gasoline engine. After soaking separately in reference base fuel and petroleum ether, the mass of insoluble deposits produced is weighed and photographed. 5 Test Conditions Ambient temperature: 20 °C to 25 °C; relative humidity: not greater than 70%. 6 Apparatus 6.1 Gasoline engine intake valve deposit simulator: technical requirements shall comply with Annex A. 6.2 Analytical balance: with a scale division of 0.1 mg. 6.3 Desiccator: containing desiccant. 6.4 Oven: capable of controlling temperature from 20 °C to 200 °C, with an accuracy of ±2 °C. 6.5 Microsyringe: 1000 μL. 6.6 Graduated cylinder: 500 mL. 6.7 Tweezers: made of wood. 6.8 Gloves: made of antistatic material. 6.9 Sample container: 500 mL, brown glass bottle. 6.10 Digital camera: resolution not less than 16 megapixels. 7 Reagents and Materials 7.1 Reagents 7.1.1 Cleaning solvent: prepared from nheptane and xylene in a volume ratio of 2:1. 7.1.2 Petroleum ether: boiling range 60 °C to 90 °C, analytical grade. 7.1.3 Anhydrous ethanol: purity not less than 99.5%. 7.2 Materials 7.2.1 Scouring pad: 240 mesh to 280 mesh. 7.2.2 Waterproof abrasive paper: 62 μm. 7.2.3 Deposit accelerant: main component dicyclopentadiene, with a mass fraction of not less than 90%. 7.2.4 Calibration reference detergent: shall comply with the requirements of GB 19592. 7.2.5 Reference base fuel: shall comply with the technical index requirements of Table B.1 in Annex B, as well as the other technical index requirements of Grade 95 motor gasoline of Stage VI in GB 17930; shall not contain gasoline detergent; after the addition of a calibrated amount of deposit accelerant, the measured simulated intake valve deposit mass shall be between 7 mg and 9 mg. 7.2.6 Cleaning agent: commercially available detergent. 7.2.7 Paper stick: made of rolled filter paper, 1.5 mm in diameter. 8 Preparation