H2 Injection System for Heavy-duty Applications

The article delves into the development of hydrogen (H2) injection systems for heavy-duty engines, focusing on their application in mobile construction machinery and heavy trucks. It explores the advantages of H2 combustion engines over fuel cells, including the reuse of existing engine components and production facilities, and the lack of complex cooling packages. The article discusses three main H2 injection concepts: Port Fuel Injection (PFI), Low Pressure Direct Injection (LPDI), and High Pressure Direct Injection (HPDI), with a particular focus on LPDI systems. It highlights the challenges and solutions for achieving precise injection pressure modulation and dynamic pressure control, essential for meeting the transient requirements of heavy-duty applications. The article also presents test results demonstrating the low leakage rates and stable injection rates of the developed H2 LPDI injector. Overall, the article emphasizes the potential of H2 internal combustion engines as a viable solution for achieving CO2 neutrality in heavy-duty applications.