This standard specifies the test requirements for marine propulsion engines or propulsion devices for yachts with a hull length of not more than 24m and other small boats with similar propulsion equipment, in addition to the requirements of GB/T 6072.1, to determine their power by measuring a point or power curve. This standard also provides methods for proving and verifying the calibrated (rated) power announced by the manufacturer. GB/T 11700-2003 Determination and calibration of power of marine propulsion engines and propulsion devices for small boats GB/T11700-2003 standard download decompression password: www.bzxz.net

ICS 47.080
National Standard of the People's Republic of China
GB/T 11700---2003/IS0 8665:1994 Small craft
Marine propulsion engines and propulsion systems
Power determination and calibration
Small craft-Marine propulsion engines and systems-Power neasurements and declarations(ISO 8665:1994,IDT)
Published on September 29, 2003
National Quality Supervision, Inspection and Quarantine Administration of the People's Republic of China
Implemented on April 1, 2004
GB/T 11700---2003/1IS0 8665: 1994 Foreword
This standard is equivalent to ISO8665:1994 Small craft (English version).
This standard replaces GB/T117001989 "Determination and calibration of power of small craft"
Marine propulsion engines and propulsion devices
Determination and reporting of power of ship propulsion engines and their devices (CB/T 3888--1999). Considering that GB/T 1170Q-:1989 is a reference to ISO8665:1988, this standard is equivalent to ISO8665:1994. Except for the international standards whose versions have been updated, the degree of adoption is also different. For ease of use, this standard has been revised as follows: a) "This international standard" is changed to "this standard" b) The decimal point is replaced by "" as a decimal point; d) The foreword of the international standard is deleted: 3 Definitions should be changed to "3 Terms and definitions"; e) The introduction of "Normative references" has been modified according to GB/T 11700-2000. This standard is proposed by China Shipbuilding Industry Corporation. This standard is under the jurisdiction of the 708th Institute of China Shipbuilding Industry. The drafting unit of this standard is: China Shipbuilding Industry 708th Institute. The main drafters of this standard are: Lin Dehui and Li Zhensheng. The previous versions of the standards replaced by this standard are: --- GB/T 11700-1989, CB/T 3888-1999. 1 Standard GB/T 11700-2003/IS0 8665: 1994 Determination and calibration of power of marine propulsion engines and propulsion devices for small boats
This standard specifies the test requirements for marine propulsion engines or propulsion devices for yachts with a hull length not exceeding 24 m and other small boats using similar propulsion equipment, in addition to the requirements of GB/T6072.1, to determine their power by measuring a point or power curve. This standard also provides methods for proving and verifying the calibrated (rated) power announced by the manufacturer. 2 Normative references
The clauses in the following documents become clauses of this standard through reference in this standard. For dated referenced documents, all amendments (excluding errata) or revisions accompanying them are not applicable to this standard. However, the parties who have reached an agreement based on this standard shall study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions shall apply to this standard. G3/T6072.1-2000 Performance of reciprocating internal combustion engines Part 1 Standard benchmark conditions , Calibration and test methods for power, fuel consumption and oil consumption (idt ISO3046-1: 1995) IS0) 3046-3: 1989 Performance of reciprocating internal combustion engines Part 3: Test measurements ISO3675: 1993 Laboratory determination of density or relative density of crude oil and liquid petroleum products Petroleum densimeter method 1 ISO5163: 1990 Determination of explosion characteristics of gasoline and aviation fuels Gasoline engine method IS05164: 1990
Gasoline batch fuel explosion characteristics determination research method paint ISO5165: 1992 Determination of ignition properties of diesel engine fuels Cetane number method ISO8217: 1987 Petroleum products Fuel (F grade) Marine fuel specifications 3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
declared engine speed
declared engine speed
declared crankshaft speeda) (for spark-ignition engines without speed governor) the average speed of the wide range of speeds recommended by the manufacturer for propeller selection at full throttle.
b) (for engines with speed governor) the adjusted speed selected by the manufacturer 3.2
declared powerdeclared power
For a given engine or propulsion unit, the effective braking power determined and corrected in accordance with GB/I6072.1 at its final output shaft when all auxiliary devices affecting its power output are installed. 3.2.1
declared propeler shaft powerFor engines sold with complete propulsion unit, it refers to the power at the propeller shaft; for engines sold with reduction and/or reverse gear, it refers to the power at the coupling connected to the propeller shaft. 3.2.2
Declared crankshaft powerGB/T 11700--2003/IS0 8665:1994For engines sold without reduction or reverse gear, outboard drive or sail drive, it refers to the power at the engine output shaft. 4Declaration
The document provided by the manufacturer shall state the declared power as defined in 3.2. In the case of declared crankshaft power (3.2.2), the power shall be stated with an explanation. The effective power can only be obtained by subtracting the device losses. 5Test preparation
5. 1 Engine or propulsion unit
5.1.1The test engine or propulsion unit shall be a representative sample of the products produced by the manufacturer. It shall be tested according to the manufacturer's recommendations and shall be equipped with an exhaust system. All auxiliary devices installed shall be listed and explained. 5.1.2 If the engine is tested in a horizontal state, the carburetor wedge can be removed or added to keep the carburetor at the normal operating angle.
5.1.3 If the exhaust system is not submitted as a complete set, the back pressure of the engine at the rated speed should be within ±0.75 kPa of the maximum exhaust back pressure that can reach the rated power specified by the manufacturer. If the exhaust system is submitted as a complete set, the test laboratory exhaust system should keep the exhaust pressure at the outlet of the device within ±0.75 kPa of the test bench pressure gauge reading.
Note: The calibration of the maximum allowable back pressure shall be in accordance with the requirements of GB/T6072.1-2G00. 5.1.4 If the engine air inlet is connected to the test laboratory air system, the air provided to the engine by the system should be within ±0.75 kPa of the test bench pressure gauge reading.
5.1.5 For liquid-cooled engines, except for engines equipped with charge air coolers, the cooling water overflow should be maintained at 298K ± 5K (25% ℃ 5℃), and the cooling water temperature at the seawater inlet should be maintained at 298K ± 5K (25 ℃ 15℃). The cooling water pressure should not exceed 50kPa. If the cooling water outlet temperature range is specified, it should be within the range specified by the manufacturer. 5.1.6 The fuel temperature at the diesel engine fuel injection pump inlet should be maintained at 313K ± 3K (40℃ ± 3℃). Note: These requirements are only applicable to diesel engines running on medium or heavy fuel oil. 5.2 Fuel and lubricating oil
5.2.1 The fuel used should comply with the manufacturer's technical specifications. 5.2.2 For spark ignition engines, record the octane number determined by ISC) 5163 (gasoline engine method) and ISO 5164 (research method), and the density determined by ISO 3675.
5.2.3 For diesel (compression ignition) engines, record the cetane number determined in accordance with ISO5165, the density determined in accordance with ISO3675 and the lower heating value. ISO F-DMX (see ISO 8217) fuel or equivalent fuel suitable for the engine may be used. 5.2.4 The lubricating oil used shall comply with the manufacturer's specifications. Record the type, grade and viscosity of the lubricating oil (if applicable). 6 Test conditions
6. 1 Operating conditions
The test conditions shall be kept as close as possible to the standard reference conditions (see 3.2) to minimize the calibration factor. Before the test, the components shall be adjusted in accordance with the manufacturer's instructions. During the test, no changes or adjustments shall be made except those specified in the test procedure. 6.2 Generators and hydraulic devices
Generators or alternators, hydraulic devices and similar devices intended for intermittent loads shall only be operated under no-load conditions. 6.3 Engine stability
Data shall not be read until the engine has reached a stable condition where the engine has remained within the permissible deviation specified in 4.2 of ISO 3146-3:1989 for at least 2 min.
6.4 Engine speed
When running or reading, the engine speed shall not deviate from the rated speed by more than 2 1% or 2 10 r/min, whichever is greater. 6.5 Fluid levels
All fluid levels shall be within the limits specified by the manufacturer. 6.6 Wet exhaust capacity
The wet exhaust device shall operate under a water flow hood as required for normal operation. 7 Data measurement
7.1 Accuracy
The determination and accuracy of the test shall be in accordance with ISO 3046-3. 7.2 Air temperature
GB/T 11700--2003/ISO 8665.1994 The intake air (ambient air) temperature of the virtual engine should be measured to obtain the overall average temperature. The temperature should be measured in the engine manhole airflow or within 150 mm of the air filter, muffler or flame arrester intake. 7.3 Coolant temperature
The cooling medium temperature should be measured within 150 mm of the seawater intake. The water jacket overflow of liquid-cooled engines and the temperature of air-cooled engines should be measured at the points specified by the manufacturer. 7.4 Lubricating oil temperature
The lubricating oil temperature should be measured at the points specified by the manufacturer. 7.5 Readings
The dynamometer load, engine speed, ambient atmospheric pressure, wet bulb and dry bulb readings, and fuel consumption (if required) should be observed at regular intervals and should be the average of at least two stable values. The variation of these stable values ​​should not exceed the allowable deviation specified in 4.2 of ISO3046-3:198. However, for engine speed, the deviation should not exceed ±1% or ±10 r/min, whichever is greater. When measuring engine speed and fuel consumption, the time interval between each measurement should not be less than 305. 7.6 Recording of results
The power test data listed in 7.6.1 and 7.6.2 should be recorded. The data in 7.6.3 is optional. 7.6.1 The following data should be recorded simultaneously within 1 minute: a) engine speed:
torque or spool load;
intake air temperature and pressure at the location specified in 7.2; d)
fuel temperature [for diesel (compression ignition) engines only]: e) www.bzxz.net
ambient temperature!
atmospheric pressure of the test bench;
humidity.
The following data should also be recorded:
Test rate Exhaust system pressure (see 5.1.3); b)
Lubricating oil temperature (see 7.4):
Cooling water temperature at seawater inlet and engine outlet (see 6.1.5 and 7.3): d) Cooling water pressure (see 5..5):
Oil supply per injection cycle For diesel (compression ignition) engines, and if the engine has no acceptance test: f) Exhaust back pressure (see 5.1.3).
7.6.3 When applicable or for safe operation, the following optional data should be recorded: a)
lubricating oil pressure
b) intake air temperature and pressure in the intake manifold; exhaust temperature:
d) ignition or injection time:
GB/T11700-—2003/ISO B665.1994e) fuel supply pressure at the outlet of the fuel supply pump: f) fuel consumption per unit time.
8 Data report
B.1 Power and speed calibration
The single calibrated power value should be accompanied by the engine calibrated speed. Another method can be used to express power and engine speed in a power curve. The calibration shall indicate whether this power is the propeller shaft power (3.2.1) or the crankshaft power (3.2.2).
8.2 Engine speed range and rated power
It is recommended to select the engine speed range at full throttle as defined in 3.1:) so that the maximum power within this range exceeds the rated power by no more than 6%. If the maximum power exceeds the rated power by 6%, both powers shall be indicated. 9 Manufacturing tolerances
At the rated engine speed, the power measured for any single marine propulsion engine or propulsion unit shall not deviate from the rated value by more than the following values:
a) ±5% for engines or propulsion units with speed governors and rated power greater than 100 kW, or h) ±10% or ±0.45 kW for other engines and propulsion units, whichever is greater.) within the engine speed range at full throttle as defined in the Regulations, so that the maximum power within this range exceeds the rated power by not more than 6%. If the maximum power exceeds the rated power by 6%, both powers shall be marked. 9 Manufacturing tolerances
At the rated engine speed, the power measured for any single marine propulsion engine or propulsion unit shall not deviate from the rated value by more than the following values:
a) for engines or propulsion units with speed governors and rated power greater than 100 kW, ± 5%, or h) for other engines and propulsion units, ± 10% or ± 0.45 kW, whichever is greater.) within the engine speed range at full throttle as defined in the Regulations, so that the maximum power within this range exceeds the rated power by not more than 6%. If the maximum power exceeds the rated power by 6%, both powers shall be marked. 9 Manufacturing tolerances
At the rated engine speed, the power measured for any single marine propulsion engine or propulsion unit shall not deviate from the rated value by more than the following values:
a) for engines or propulsion units with speed governors and rated power greater than 100 kW, ± 5%, or h) for other engines and propulsion units, ± 10% or ± 0.45 kW, whichever is greater.
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