The main pollutants emitted by diesel engines are HC (odor), CO, PM (black smoke), and NOx. It causes a foul odor and irritates the eyes, mouth, nose, throat, and respiratory tract. It is also toxic and carcinogenic. CO affects the respiratory system, preventing oxygen absorption and causing headaches. High concentrations can be fatal. PM (black smoke) causes respiratory problems and is carcinogenic. NOx irritates the respiratory tract. Diesel engines can use oxidation catalytic converters (DOCs), direct-flow, maintenance-free diesel particulate filters (FTFs), and wall-flow diesel particulate filters (DPFs) to remove HC, CO, and particulate matter.

Ceramic DPF filters are currently the most commonly used on the market. When diesel engine exhaust passes through the DPF purification unit, particulate matter (PM) in the exhaust is intercepted and captured, thereby reducing the concentration of PM particles in the exhaust. However, after a period of use, the DPF filter element accumulates trapped soot particles, requiring regeneration of the DPF carrier.

Ceramic DPF is a deep-hole filtration technology that is easy to clog and difficult to backflush during use. It has a short maintenance cycle and can easily cause the engine to choke.

Based on years of experience and incorporating advanced international technologies, our company has independently developed and designed a self-reverse-blowing, high-temperature-resistant metal filter, also known as a metal DPF (high-temperature resistant). This metal DPF utilizes imported black smoke filter material, boasting high-temperature resistance, low backpressure, a long lifespan, reasonable cost, and a long maintenance-free cycle (maintenance every 6-12 months). Its advanced rapid regeneration principle allows the filter element to regenerate rapidly (less than 1 second per filter element), automatically collecting black smoke and instantly restoring the filter element to a low-resistance state. Currently, our company is the first to implement this technology, which has been widely adopted in engine aftertreatment systems and has received positive customer reviews. This solution addresses the challenges of DPFs, which are prone to clogging and difficult to reverse-blowing, and the risk of engine damage. It also addresses the rusting and short-term saturation and clogging of conventional metal filters, as well as the potential fire hazard.