Title: Research progress of diesel-methanol dual fuel injector

Authors: Du Huang; Yazhou Li; Lei Shi; Jiayong Zhou; Dong Li; Shuang Hu; Yong Zhou; Xuedong Wu; Xiaohu Zhou; Chaonan Xiao; Xuqing Li; Chao Qu; Sheng Jiang Deng; Tao Yang; Yu Zhen Hu

Addresses: Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, China ' Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, Shanghai, China; Chongqing Hongjiang Machinery Co., Ltd., 404 Tanhua Road, Yongchuan, Chongqing, China ' Shanghai Jiaotong University, 800 Dongchuan RD. Minhang District, Shanghai, China ' Chongqing Key Laboratory of Marine Green Engine Fuel System, Chongqing Hongjiang Machinery Co., Ltd., China ' Chongqing Key Laboratory of Marine Green Engine Fuel System, Chongqing Hongjiang Machinery Co., Ltd., China ' Chongqing Hongjiang Machinery Co., Ltd., 404 Tanhua Road, Yongchuan, Chongqing, China ' Chongqing Hongjiang Machinery Co., Ltd., 404 Tanhua Road, Yongchuan, Chongqing, China ' Chongqing Hongjiang Machinery Co., Ltd., 404 Tanhua Road, Yongchuan, Chongqing, China ' Chongqing Hongjiang Machinery Co., Ltd., 404 Tanhua Road, Yongchuan, Chongqing, China ' Chongqing Key Laboratory of Marine Green Engine Fuel System, Chongqing Hongjiang Machinery Co., Ltd., China ' Chongqing Hongjiang Machinery Co., Ltd., 404 Tanhua Road, Yongchuan, Chongqing, China ' Chongqing Key Laboratory of Marine Green Engine Fuel System, Chongqing Hongjiang Machinery Co., Ltd., China ' Chongqing Hongjiang Machinery Co., Ltd., 404 Tanhua Road, Yongchuan, Chongqing, China ' Chongqing Hongjiang Machinery Co., Ltd., 404 Tanhua Road, Yongchuan, Chongqing, China ' Chongqing Hongjiang Machinery Co., Ltd., 404 Tanhua Road, Yongchuan, Chongqing, China

Abstract: Currently, methanol is globally recognised as a reliable alternative energy for achieving low/zero carbon emissions in marine engines. Marine engine manufacturers are developing diesel-methanol dual-fuel injectors, whose performance critically impacts engine power, efficiency, and emissions. This paper reviews structural and performance advancements in such injectors, highlighting their evolution from hydraulic-pressurised to electronically controlled systems. Studies demonstrate that excessive injection pressure compromises engine performance, while improper injection angles increase emissions due to uneven fuel distribution. Optimisation methods like genetic algorithms and neural networks have been employed to address these challenges. Though methanol application in marine engines remains nascent, unresolved technical issues, particularly concerning material compatibility are being targeted. Future advancements in methanol-resistant materials and gasified multiphase injection technology (e.g., in injector SAC chambers) are expected to expand dual-fuel injector applications from marine engines to broader internal combustion fields.

Keywords: research progress; diesel-methanol; dual fuel injector; design and optimisation.

DOI: 10.1504/IJHM.2025.148508

International Journal of Hydromechatronics, 2025 Vol.8 No.3, pp.343 - 357

Received: 31 Aug 2024
Accepted: 17 Dec 2024
Published online: 09 Sep 2025 *

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