Fuel Injection Solution for Spark-Ignition Heavy Fuel Piston Engines
Time：
2026-01-09
——Based on Gas-Assisted Atomization Direct Injection Technology
The gas-assisted atomization injector, utilizing the physical structure of a Laval nozzle, offers excellent low-temperature and low-pressure atomization characteristics, making it suitable for atomizing and injecting high-viscosity heavy fuels (such as kerosene, diesel, etc.).
The Gas-Assisted Atomization Direct Injection System (AADI), applied to spark-ignition heavy fuel piston engines, is compatible with multiple fuel types, particularly heavy fuels (such as kerosene, diesel, etc.). It delivers superior power performance, fuel economy, low-temperature cold-start capability, and high operational reliability. Due to the unique fuel properties and ignition methods of the engine, the gas-assisted atomization injector is required to provide exceptional atomization performance (SMD < 15 μm) and highly precise fuel metering functionality.
—— Gas-Assisted Atomization Mechanism of In-Cylinder Direct Injection Technology
The Laval nozzle structure was proposed by a Swedish engineer in 1890. It accelerates fluid media from subsonic to supersonic states and is applied in rocket thruster nozzle design.
The gas-assisted direct injection system (AADI) atomizing nozzle is a two-phase flow atomizing nozzle designed based on the principle of the Laval structure. It utilizes the gas phase to propel the liquid phase medium at supersonic speed, achieving ultra-fine atomization.
—— Solution Based on Gas-Assisted Atomization Direct Injection Technology
The working principle of the AADI technology applied to the fuel supply system of heavy fuel piston engines is illustrated in the diagram below.
The fuel pressure source and air pressure source, after passing through respective pressure regulators, enter the fuel nozzle and air nozzle. The ECU controls the injection pulse width and timing sequence to achieve precise, timed, and quantified fuel delivery.
—— Product Series Based on Gas-Assisted Atomization Direct Injection Technology
We offer customized product services to meet flexible customer requirements regarding structural design, electrical parameters, functionality, and performance.
—— Application Scenarios of Gas-Assisted Atomization Direct Injection Technology
When compressed gas passes through a Laval nozzle structure, it generates a supersonic airflow. During this process, an appropriate amount of fuel is mixed with the gas. Under the supersonic airflow conditions, the fuel accelerates and is atomized into extremely fine particles, making it suitable for atomizing and injecting high-viscosity fuels.
The viscosity and flash points of common engine fuels generally follow this trend: diesel > kerosene > gasoline. Lower viscosity facilitates better atomization, while a higher flash point enhances safety.
To ensure both safety and excellent atomization characteristics for fuel applications—particularly in scenarios requiring unified fuel supply for military vehicles, naval vessels, and individual portable power systems—the AADI system stands out as the optimal solution. It is ideally suited for application in two-stroke engines.
High-Flow Modified Vehicle Applications
Typical Case: A domestically developed high-flow specialized nozzle for vehicle modification, applied in various global civilian personal vehicle upgrades and professional racing modifications.
Application in Electronic Fuel Injection Motorcycles
Typical Case: It meets the requirements for electronic fuel injection (EFI) motorcycle engines ranging from 50cc to 1000cc under China IV emission standards. Developed for harsh environments and operating conditions, it effectively resists clogging.
Contact Information
Address: 4th Floor, North Building, No. 1 Factory, Zhengxin Science and Technology Park, No. 2 Gao Hua Road, Nanning City
