Study on the potential of injection strategies to suppress knock combustion in direct-injection hydrogen engines under high compression ratio

• Revealed the knocking characteristics of a direct-injection hydrogen engines under high compression ratios. • The study reveals the impact of injection strategies on mixture formation in cylinders. • At an injection pressure of 6 MPa, the Knock Intensity is minimized. • The knock intensity does not change monotonically with variations in injection timings. Knock limits the compression ratio increase of hydrogen engines, and overcoming the limitations of knock combustion under high compression ratios is crucial for the application of hydrogen engines. This study investigates the impact of high compression ratios interfaced with injection strategies on knock in direct-injection hydrogen engines through…

• NN
  National Natural Science Foundation of China

  Award: 52366007
• SA
  Science and Technology Major Project of Guangxi

  Awards: AA23062090, AA23062012