JB/T 12652-2016Diesel engines - Performance test methods for intake ports (English PDF)

National Standard of the People's Republic of China

ICS

27.020

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

Contents

• 1 Scope
• 2 Normative references
• 3 Terms and definitions
• 4 Test device
• 5 Test methods
• 5.1 Test conditions
• 5.2 Test steps
• 6 Calculation methods
• 6.1 General
• 6.2 Flow coefficient
• 6.3 Mean flow coefficient
• 6.4 Swirl number
• 6.5 Intake flow factor
• 6.6 Swirl ratio at the end of the intake
• 6.7 Conversion relation between the torque of the swirl momentum meter and the rotational speed of the vane of the anemometer
• 7 Test report
• Annex A (normative) Test conditions
• Annex B (normative) Test record forms
• Annex C (normative) Diagram of the inner diameter of the intake valve seat ring
• Annex D (informative) Test report
• D.1 Main contents of the test report
• D.2 Format of the test report
• Figure 1 Diagram of the steady flow test device with vane anemometer
• Figure 2 Diagram of the steady flow test device with swirl momentum meter
• Figure C.1 Diagram of the inner diameter of the intake valve seat ring
• Table A.1 Measuring ranges and accuracies of the instruments
• Table B.1 Record form of the test parameters
• Table B.2 Table of the simulated cylinder pressure values
• Table B.3 Record form of the test data
• Table B.4 Record form of the test data
• Table D.1 Table of the test results