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GB/T 17692-1999 PDF in English


GB/T 17692-1999 (GB/T17692-1999, GBT 17692-1999, GBT17692-1999)
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GB/T 17692-1999: PDF in English (GBT 17692-1999)

GB/T 17692-1999
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.060.01
T 10
Measurement Methods of Net Power for Automotive
Engines
ISSUED ON: MARCH 10, 1999
IMPLEMENTED ON: JANUARY 1, 2000
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 References ... 4 
3 Definition ... 4 
4 Type Certification ... 5 
5 Technical Specification and Test ... 5 
6 Production Conformity ... 6 
Appendix A (Normative) Main Features of Engine and Data Related to Test ... 7 
Appendix B (Normative) Report of the Test Result ... 13 
Appendix C (Normative) Measurement Methods of Net Power for Engines ... 14 
Appendix D (Normative) Production Conformity Inspection ... 26 
Appendix E (Normative) Technical Requirements for the Reference Fuels ... 27 
Appendix F (Informative) Reference ... 30 
Appendix A
(Normative)
Main Features of Engine and Data Related to Test 1)
A1 Engine specification
A1.1 Brand: ______
A1.2 Model: ______
A1.3 Working principle: spark ignition/compression ignition type/four-stroke/two-stroke 2)
1.4 Cylinder diameter ______mm
1.5 Stroke ______mm
A1.6 Number and arrangement of cylinders and order of ignition: ______
1.7 Displacement ______cm3
A1.8 Compression ratio 3)______
A1.9 Combustion chamber and piston top diagram:
A1.10 Minimum cross sectional area of intake/exhaust duct ______
A1.11 Cooling system: fluid/air cooling 2)
A1.11.1 Characteristics of liquid cooling system
Liquid property ______ circulating pump: with/without 2)
Characteristic, brand and model of circulating pump ______
Transmission ratio: ______
Thermostat: the setting value ______
Radiator: drawing or brand and model ______
Decompression valve: pressure setting value ______
1) In case of non-conventional type engine and system, the manufacturer shall provide with the data equivalent to requirements. 
2) Eliminate the non-applicable one by scratching out. 
3) Tolerance shall be specified.
Fan: characteristic or brand and model ______
Fan transmission system ______ Transmission ratio______
Fan shroud______
A1.11.2 Characteristics of air cooling system
Blower: characteristic or brand and model ______ transmission ratio ______
Wind scooper(standard): ______
Temperature control system: with/without 2) Brief description______
A1.11.3 Temperature specified by the manufacturer
A1.11.3.1 Liquid cooling: the maximum temperature at the outlet of engine coolant ______
A1.11.3.2 Air cooling: reference point ______
Maximum temperature of reference point ______
A1.11.3.3 Highest intake temperature at outlet of air intake intercooler ______
A1.11.3.4 Fuel temperature: at lowest ______ highest ______
A1.11.3.5 Lubricant temperature: at lowest ______ highest ______
A1.12 Supercharger: with/without 2) system description______
A1.13 Air intake system
Intake manifold: explanation ______
Air filter: brand ______ model ______
Inlet silencer: brand ______ model ______
A2 Additional purification equipment (if any and not included in other items)
Explanation and diagram _____
A3 Air intake and oil supply
A3.1 Description and diagram of inlet system and accessories (deceleration buffer, heating
device, auxiliary air inlet, etc.) ______
A3.2 Oil supply
A3.2.1 Carburetor
A3.2.2.3.2 Model ______
A3.2.2.3.3 Loaded fuel cut-off point speed ______r/min
A3.2.2.3.4 No-load maximum speed ______r/min
A3.2.2.3.5 Idling speed ______r/min
A3.2.2.4 Cold starting device
A3.2.2.4.1 Brand______
A3.2.2.4.2 Model______
A3.2.2.4.3 System description______
A3.2.2.5 Auxiliary starting device
A3.2.2.5.1 Brand______
A3.2.2.5.2 Model______
A3.2.2.5.3 System description______
A4 Valve timing or equivalent data
A4.1 The maximum lift of gas valve, switching angle based on upper dead point, or detail
valve timing of variable air distribution system______
A4.2 Reference point and/or range of set value 2)
A5 Ignition
A5.1 Igniting system
A5.1.1 Brand______
A5.1.2 Model______
A5.1.3 Ignition advance curve 3)______
A5.1.4 Ignition timing 3)______
A5.1.5 Contact clearance 3)______And dwell angle 2)3)______
A6 Exhaust system
Explanation and diagram ______
A7 Lubrication system
A7.1 System description
A7.1.1 Position of lubrication tank: ______
A7.1.2 Supply system (pump/injection to inlet system/mixing with fuel, etc.)______
A7.2 Lubricating oil pump 2)
A7.2.1 Brand______
A7.2.2 Model______
A7.3 Mixed with fuel oil 2)
A7.3.1 Percentage ratio ______
A7.4 Engine oil cooler: with/without 2)
A7.4.1 Figure or Brand and Model______
A8 Electrical equipment:
Dc generator/alternator 2): ______Brand and Model or Characteristic ______
A9 Engine-mounted other accessories
(inventory, if necessary give a brief description) ______
A10 Additional data related to test condition
A10.1 Spark plug
A10.1.1 Brand______
A10.1.2 Model______
A10.1.3 Set value of spark plug gap ______
A10.2 Ignition coil
A10.2.1 Brand______
A10.2.2 Model______
A10.3 Firing capacitor
A10.3.1 Brand______
A10.3.2 Model______
Appendix B
(Normative)
Report of the Test Result
B1 Engine tradename or trademark: ______
B2 Engine model: ______
B3 Name and address of manufacturer: ______
B4 Name and address of manufacturer's agency(if any): ______
B5 Date for engine submitted to certificate: ______
B6 Inspection organization responsible for certification test: ______
B7 Date of report issued by inspection organization: ______
B8 Report No. issued by inspection organization: ______
B9 Data declared by manufacturer
B10 Maximum net power: ______kW, ______r/min
B11 Maximum net torque: ______Nꞏm, ______r/min
B12 Basic characteristics of engine type:
Stroke number: four-stroke or two-stroke 1)
Number and arrangement of cylinders: ______
Displacement: ______cm3
Fuel supply: carburetor/indirect injection/direct injection 1)
Supercharging device: with/without 1)
Exhaust purification equipment: with/without 1)
B13 These saved files during certification may be obtained as required.
1) Eliminate the non-applicable one by scratching out. 
Appendix C
(Normative)
Measurement Methods of Net Power for Engines
C1 This Appendix is applicable to measure the curve of engine net power relative to engine
speed in full-load working condition.
C2 Test condition
C2.1 The engine shall be burnished in accordance with the specification recommended by
manufacturer.
C2.2 In the event that the power is only measured on the engine with gearbox, the
efficiency of gearbox shall be included.
C2.3 Auxiliaries
C2.3.1 Auxiliaries required for installation
During the test, auxiliaries (as shown in Table C1) required for the intended functions of
engine operation shall be installed in engine and at the same position as that for actual use as
much as possible.
C2.3.2 Auxiliaries required for removal
Several automobile accessories only required for vehicle running are possibly installed at
engine, during the test they shall be demounted. Partial examples are illustrated in the
following:
Air compressor for brake;
Power-steering compression pump;
Suspension compressor;
Air conditioning system
Where these accessories cannot be dismantled, the absorbed power in no-load state shall be
measured and added into the measured engine power.
C2.3.3 Starting auxiliaries of compression ignition engine
With the auxiliaries for starting compression ignition engine, the following two conditions
shall be considered:
C3.2 Air intake (ambient air) temperature of engine shall be measured within 0.15m from
upstream of air filter entrance. In case of no air filter, it shall be measured within 0.15m from
air inflow bellmouth. Thermometer or thermocouple shall be directly placed at air flow and
isolated from radiant heat and back-spraying fuel oil. It shall be measured at more than
enough positions so that representative average intake air temperature can be obtained.
C.3.3 Data may be measured only after torque, rotation speed and temperature keeps stable
for 1min.
C3.4 During operation or reading period, difference between engine speed and selected
speed shall not exceed ±1% or ± 10r/min, and larger value is taken.
C3.5 Simultaneously read data of torque, fuel consumption and intake air temperature and
the average of two-time continuous stable value shall be taken while difference between
two-time measured values of torque shall be less than 2%.
C3.6 The temperature of coolant at engine outlet shall meet the requirements of value
specified by the manufacturer. It, in case of not being specified by manufacturer, shall be 353
K±5K.
For air cooled engines, the temperature of the point designated by the manufacturer shall be
kept within the range of (+0/-20K) maximum temperature designated by the manufacturer
under the standard condition.
C3.7 Fuel temperature shall be measured at oil inlet of carburetor or fuel injection system or
representative position as stated by the manufacturer and shall be within the range of the
specified limit of engine manufacturer.
C3.8 Engine oil temperature measured at outlet of oil pan or oil cooler (if equipped with)
shall be within the range of the specified limit of manufacturer.
C3.9 Where necessary, auxiliary regulating system may be adopted to keep temperature
specified by C3.6, C3.7 and C3.8 within the limited range.
C4 Measuring accuracy
C4.1 Torque: ±1% actually measured value.
Torque measurement system of dynamometer shall be subjected to dynamic calibration to
eliminate the influence of friction resistance. Where torque is within 50% full measuring
range of dynamometer, its accuracy may be ±2% actually measured torque.
C4.2 Engine speed: ±0.5% measured rotate speed.
C4.3 Fuel consumption: ±1% actually measured consumption.
C4.4 Fuel temperature: ±2K.
C4.5 Engine intake temperature: ±2K.
C4.6 Atmospheric pressure: ±100Pa.
C4.7 Pressure of intake pipe: ±50Pa.
C4.8 Pressure of exhaust pipe: ±200Pa.
C5 Power correction coefficient
C5.1 Definition
Power correction coefficient α is adopted for obtaining power of engine under standard
atmospheric condition specified by C5.2.
PO=α×P
Where,
PO - the correction power (i.e. power under standard atmospheric condition);
α - the correction coefficient (αa or αd);
P - the measured power (test power).
C5.2 Standard atmospheric condition
C5.2.1 Temperature (To): 298K (25°C)
C5.2.2 Dry air pressure (pSO): 99kPa
It is obtained based on total atmospheric pressure of 100kPa and vapor differential pressure of
1kPa.
C5.3 Test atmospheric conditions
Atmospheric conditions during the test shall be within the following range:
C5.3.1 Temperature (T)
Spark-ignition engine: 288 K≤T≤308 K
Diesel engine: 283 K≤T≤313 K
C5.3.2 Air pressure (ps)
80 kPa≤ps≤110 kPa
conditions (temperature and pressure) shall be explained accurately in the test report.
Attachment CA
Test Result for Determination of Engine Net Power
This Table shall be completed by laboratory where the test is conducted.
CA1 Test conditions
CA1.1 Pressure measured under the maximum power:
CA1.1.1 Total atmospheric pressure: ______Pa
CA1.1.2 Differential pressure of vapor: ______Pa
CA1.1.3 Exhaust pressure: ______Pa
CA1.2 Temperature measured under the maximum power:
CA1.2.1 Intake air temperature ______K
CA1.2.2 Temperature at outlet of engine intercooler ______K
CA1.2.3 Coolant temperature
CA1.2.3.1 Temperature at outlet of engine coolant______K 1)
CA1.2.3.2 Temperature at datum point(during air cooling)______K1)
CA1.2.4 Temperature of lubricating oil______K(measuring point designated)
CA1.2.5 Temperature of fuel oil:
CA1.2.5.1 Temperature at inlet of carburetor /fuel injection system______K1)
CA1.2.5.2 Temperature in measuring device of fuel consumption ______K
CA1.3 Characteristic of dynamometer:
CA1.3.1 Brand: ______Model: ______
CA1.3.2 Machine model: ______
CA2 Fuel
CA2.1 Spark-ignition liquid fuel engine
CA2.1.1 Brand: ______
CA2.1.2 Specification: ______
CA2.1.3 Antiknock additive (lead etc.)
CA2.1.3.1 Category: ______
CA2.1.3.2 Content: ______mg/L
CA2.1.4 Octane value RON (determined according to GB/T 5487)______
CA2.1.4.1 Density: ______g/cm3(under 288K)
CA2.1.4.2 Low calorific value: ______kJ/kg
CA2.2 Spark-ignition gaseous propellant engine
CA2.2.1 Brand: ______
CA2.2.2 Specification: ______
CA2.2.3 Storage pressure: ______kPa
CA2.2.4 Working pressure: ______kPa
CA2.2.5 Low calorific value: ______kJ/kg
CA2.3 Compression-ignition-type gaseous propellant engine
CA2.3.1 Fuel supply system: ______
CA2.3.2 Specification of fuel gas used: ______
CA2.3.3 Fuel oil/gas ratio: ______
CA2.3.4 Low calorific value: ______kJ/kg
CA2.4 Compression-ignition-type liquid fuel engine
CA2.4.1 Brand: ______
CA2.4.2 Specification of fuel used: ______
CA2.4.3 Cetane value(determined according to GB/T 2410)______
CA2.4.4 Density: ______g/cm3(Under288 K)
Appendix D
(Normative)
Production Conformity Inspection
D1 Basic requirements
The requirements of this Appendix shall be consistent with test so as to inspect production
conformity according to Chapter 6.
D2 Test
Test method and measuring apparatus shall meet the requirements of Appendix C.
D3 Sampling
One engine shall be selected and provided that test is judged to be inconsistent with the
requirements of this Standard according to D5.1, two machines shall be re-tested.
D4 Determination criteria
During the test for production conformity verification, net power shall be determined
respectively under corresponding engine speed of the maximum power and maximum torque
during type certification, and allowable tolerance is ±5%. The difference between measured
net power and certificated value shall be no greater than ±5%.
D5 Result assessment
D5.1 Provided that measured net power of engine according to D2 fully meets the
requirements of D4, it is deemed that production meets the requirements of this Standard.
D5.2 In case of inconsistency with D4, another two engines shall be tested in the same way.
D5.3 Provided that the net power(s) of second and/or the third engine in D5.2 fail(s) to meet
the requirements of D4, then, it is deemed that the production fails to meet the requirements
of this Standard.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.