1、Approved by NQTSB on 1999-03-10 Enforcement Date: 2000-01-01 National Standard of the Peoples Republic of China Measurement Methods of Net Power for Automotive Engines GB/T 17692-1999 1. SCOPE This standard stipulates the measurement methods of net power for automotive engines. This standard applies
2、 to representation of curve as a function of engine speed of the power at full load indicated by the manufacturer for internal combustion engines intended for the propulsion of motor vehicles of categories M and N. This standard applies to reciprocating piston engines (positive-ignition or compressi
3、on-ignition) or rotary piston engines (positive-ignition or compression-ignition), but excluding free piston engines. 2. REFERENCE The following standards contain provisions, which, through reference in this text, constitute provisions of this standard. At time of publication the editions indicated
4、were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. SH 0041-1993 Automotive Unleaded Gasoline 3. DEFINITIONS For the purposes of this s
5、tandard: 3.1 Approval of an engine means the approval of an engine type with regard to its net power measured in accordance with the procedure specified Annex C of this standard; 3.2 Engine type means a category of an engine for installation in a motor vehicle which does not differ in such essential
6、 characteristics as those defined in Annex A to this standard; 3.3 Net Power means the power obtained on a test bench at the end of the crankshaft or its equivalent at the corresponding engine speed with the auxiliaries listed in Table 1 of Annex C to this standard, and determined under reference at
7、mospheric conditions. 4. TYPE APPROVAL If the power of the engine submitted for approval pursuant to this standard has been measured according to the specifications of paragraph 5 below, approval of the engine type shall be granted. GB/T 17692-1999 5. SPECIFICATIONS AND TESTS 5.1 General The compone
8、nts liable to affect the power of the engine shall be so designed, constructed and assembled as to enable the engine in normal use, despite the vibration to which it may be subjected, to comply with the provisions of this standard. 5.2 Description of tests 5.2.1 The net power test shall consist of a
9、 run at full throttle for positive-ignition engines and at fixed full-load fuel injection pump setting for diesel engines, the engine being equipped as specified in Table 1 of Annex C to this standard. 5.2.2 Measurements shall be taken at a sufficient number (more than 8) of engine speeds to define
10、correctly the power curve between the lowest and the highest engine speeds recommended by the manufacturer. This range of speeds must include the speeds of revolution at which the engine produces its maximum power and its maximum torque. 5.2.3 The fuel used shall be one available on the market. In a
11、ny case of dispute, the fuel shall be one of the reference fuels defined by Annex E to this standard. 5.2.4 Measurements shall be carried out according to the provision of Annex C to this standard. 5.2.5 The test report shall contain the results and all the calculations required to find the net powe
12、r, as listed in the Appendix CA to Annex C to this standard together with the characteristics of the engine listed in Annex A to this standard. 5.3 Interpretation of results The net power indicated by the manufacturer for the type of engine shall be accepted if it does not differ by more than +2% fo
13、r maximum power and more than +4% at the other measurement points on the curve with a tolerance of + 1.5% for engine speed, from the values measured by the technical service on the engine submitted for testing. 6. CONFORMITY OF PRODUCTION 6.1 For verifying whether the engine products conform to the
14、approved engine type , conformity production checks shall be carried out according to Annex D to this standard. GB/T 17692-1999 ANNEX A (Annex to this standard) ESSENTIAL CHARACTERISTICS OF THE ENGINE AND INFORMATION CONCERNING THE CONDUCT OF TESTS 1/ Al. Description of engine . Al.1.Make . A1.2. Ty
15、pe . A1.3.Working principle: positive-ignition/ compression-ignition/ four-stroke/ two-stroke3/ A1.4. Bore .mm Al.5. Stroke . mm A 1.6. Number and layout of cylinders and firing order . A1.7. Cylinder capacity .cm3A1.8. Compression ratio 2/ . A1.9. Drawings of combustion chamber and piston crown . A
16、1.10. Minimum cross-sectional area of inlet and outlet ports . Al.11.Cooling system: liquid/air cooling 3/ . Al.11.1. Characteristics of liquid-cooling system Nature of liquid . Circulating pump: yes/no 3/ Characteristics of make(s) and type(s) of the pump . Drive ratio . Thermostat: setting. Radiat
17、or: drawing(s) or make(s) and type(s) . Relief valve: pressure setting: . Fan: characteristics or make(s) and type(s) . Fan drive system: . drive ratio: . Fan cowl: . A 1.11.2. Characteristics of air-cooling system Blower: characteristics or make(s) and type(s).drive ratio: . Air ducting (standard p
18、roduction): . Temperature regulating system: yes/no 3/Brief description . GB/T 17692-1999 A 1.11.3. Temperature permitted by the manufacture Al.11.3.1 Liquid cooling: Maximum temperature at engine outlet . Al.11.3.2 Air cooling: . Reference point Maximum temperature at reference point . A 1.11.3.3 M
19、aximum charge air temperature at reference point . Al. 11.3.4 Fuel temperature: min. . max. . Al.11.3.5 Lubricant temperature: min. . max. . A 1.12 Supercharger: yes/no 3/Description of the system . A 1.13 Intake system Intake manifold: . Description . Air filter:. Make . Type . Intake silencer: .Ma
20、ke . Type . A2. Additional anti-pollution devices (if any, and if not covered by another heading) Description and diagrams . A3. Air intake and fuel feed A3.1 Description and diagrams of inlet pipes and their accessories (dash-pot, heating device, additional air intakes, etc.) A3.2 Fuel feed A3.2.1
21、By carburetor(s) 3/ .Number . A3.2.1.1 Make . A3.2.1.2 Type . A3.2.1.3 Adjustments 2/ A3.2.1.3.1 Jets . A3.2.1.3.2 Venturis . Or A3.2.1.3.3 Float-chamber level A3.2.1.3.4 Mass of float A3.2.1.3.5 Float needle Curve of fuel delivery plotted against air flow, and settings required to keep to the curve
22、 2/3/ A3.2.1.4 Manual/automatic choke 3/ . Closure setting 2 / . A3.2.1.5 Feed pump Pressure 2/ . or characteristics diagram 2/ . A3.2.2. By fuel injection 3/system description . Working principle: Intake manifold/direct injection . injection prechamber/swirl chamber 3/ . A3.2.2.1 Fuel pump . A3.2.2
23、.1.1 Make . GB/T 17692-1999 A3.2.2.1.2 Type . A3.2.2.1.3 Delivery: mm3 per stroke at a pump speed of rpm 3/2/ . or, alternatively, a characteristic diagram 3 / 2 / . calibration procedure: test bench/engine 3/ . A3.2.2.1.4 Injection timing . A3.2.2.1.5 Injection curve . A3.2.2.2 Injector nozzle . A3
24、.2.2.3 Governor . A3.2.2.3.1 Make . A3.2.2.3.2 Type . A3.2.2.3.3 Cut-off point under load min- . A3.2.2.3.4 Maximum speed without load min . A3.2.2.3.5 Idle speed . A3.2.2.4 Cold start device . A3.2.2.4.1 Make . A3.2.2.4.2 Type . A3.2.2.4.3 System description . A3.2.2.5 Starting aid . A3.2.2.5.1 Mak
25、e . A3.2.2.5.2 Type . A3.2.2.5.3 System description . A4. Valve timing or equivalent data A4.1 Maximum lift of valves, angles of opening and closing, or timing details of alternative distribution systems, in relation to top dead centre A4.2 Reference and/or setting ranges 3/ . A5. Ignition A5.1 Igni
26、tion system type . A5.1.1 Make . A5.1.2 Type . A5. ! .3 Ignition advance curve .2/ . GB/T 17692-1999 A5.1.4 Ignition timing 2/ . A5.1.5 Contact-point gap 2/and dwell-angle 2/3/ . A6. Exhaust system Description and diagrams . A7. Lubrication system A7.1 Description of system A7.1 1 Position of lubric
27、ant reservoir . A7.1.2 Feed system(pump, injection into intake, mixing with fuel, etc.) A7.2 Lubricating pump 3/ A7.2.1 Make . A7.2.2 type . A7.3 Mixture with fuel 3/ A7.3.1 Percentage A7.4 Oil cooler: yes/no_3/ A7.4.1 Drawing(s) or make(s) and type(s) . A8. Electrical equipment Generator/alternator
28、: 3/characteristics or make(s) and type(s) A9. Other auxiliaries fitted on the engine (Enumeration and brief description if necessary) . A10. Additional information on test conditions A10.1 Sparking plugs Al0.1.1 Make . Al0.1.2 Type . A10.1.3 Spark-gap setting . A10.2 Ignition coil Al0.2.1 Make . A1
29、0.2.2 Type . A10.3 Ignition condenser Al0.3.1 Make . A10.3.2 Type . GB/T 17692-1999 A10.4 Radio interference suppression equipment Al0.4.1 Make . A10.4.2 Type . A11. Engine performance (declared by manufacturer) A11.l Idle rpm 2 / . min- lA11.2 RPM at maximum power 2/ .min-1A11.3 Maximum power-kW (a
30、ccording to paragraph 5.3 of this standard) A11.4 RPM at maximum torque 2/ . min-1A11.5 Maximum torque 2/ . N.m. Notes: 1/ In the case ofnon-conventi0nal engines and systems, particulars equivalent to those referred to here shall be supplied by the manufacturer. 2/ Specify the tolerance. 3/ Strike o
31、ut what does not apply. GB/T 17692-1999 ANNEX B (Annex to this standard) TEST RESULTS REPORT B 1. Trade name or mark of engine: . B2. Engine type: . B3. Manufacturers name and address: . B4. If applicable, name and address of manufacturers representative: . B5. Engine submitted for approval on: . B6. Testing institute responsible for conducting approval tests: . B7. Date of report issued by that institute: . B8. Number of report issued by that institute: . B9. Declared figures B 10 Maximum net power: . kW, at .
