USUI CO., LTD. Product Lineup

USIT-SP is the world's first fuel injection pipe adopted for common rail fuel injection systems that are effective in reducing diesel engine exhaust emissions. Since then, to support the advancement of diesel engine technology, Usui International Industry Co., Ltd. has utilized its unique plastic processing technology, heat treatment technology, and inner surface smoothing technology to consistently achieve the world's highest level of pressure resistance. At the same time, we have developed cleaning technology that reduces foreign substances inside the pipe, achieving an extremely high level of cleanliness. 【Features】 ○ Highly regarded and installed in more than half of the common rail diesel engines produced worldwide. ○ To respond to the strengthening of future exhaust gas regulations, the current fuel injection pressure of around 200 MPa is expected to increase further. ○ Development of fuel injection pipes compatible with common rail injection systems exceeding 250 MPa has been completed. For more details, please contact us or download the catalog.

• Piping Materials

To improve the efficiency of gasoline engines, the technology for gasoline direct injection systems is expanding. Meanwhile, a variety of fuels, such as ethanol-blended fuels, are becoming available. The high-pressure fuel piping for gasoline direct injection engines from Usui International Industry Co., Ltd. is made of stainless steel designed for high-pressure gasoline fuel, which requires high airtightness. By applying the technology of fuel injection pipes that have received high praise for diesel engines, we ensure high reliability. 【Features】 - Supports further high pressure - Steel piping with Fenikel treatment for fuel corrosion resistance is also available For more details, please contact us or download the catalog.

• Piping Materials

The application of returnless systems is expanding as a measure to reduce fuel vapor emissions in gasoline engines. Consequently, fuel pressure pulsations are increasing, making a pulsation damper necessary. UFRID can effectively dampen fuel pressure pulsations within the rail itself, preventing unpleasant cabin noise induced by fuel pressure pulsations without the need for a pulsation damper. By making the rigidity of the rail smaller than the bulk modulus of the fuel, it effectively absorbs the energy of the pulsations generated during fuel injection while ensuring the strength required for the rail. 【Features】 ○ Eliminates the need for a pulsation damper by adopting UFRID ○ Contributes to reducing system cost and weight For more details, please contact us or download the catalog.

• Other machine elements

Brefin tubes are widely used as piping for oil cooling, such as power steering oil and engine oil. Brefin tubes are manufactured by continuously winding fins in a spiral shape around the pipe and brazing them in a furnace. 【Features】 - Excellent cooling performance due to the increased surface area of the fins. - Utilizing accumulated know-how as a pipe specialist manufacturer, we support the selection of materials, surface treatments, and heat transfer calculations to provide optimal specifications for various applications. For more details, please contact us or download the catalog.

• Piping Materials

UL-FLEX TUBE is a flexible tube that excels in flexibility and can absorb relative displacement between installations. Its unique ByPitch method allows for great freedom in piping design, enabling quick responses to prototypes and design changes. With its high flexibility, UL-FLEX TUBE is effective in locations where displacement occurs due to thermal deformation during installation or operation, such as in connection piping used in engines. Bellows processing can be done at the desired positions and in the desired quantities. 【Features】 - Effective in locations where displacement occurs due to thermal deformation during installation or operation, such as in connection piping used in engines. - Bellows processing can be done at the desired positions and in the desired quantities. For more details, please contact us or download the catalog.

• tube

To respond to the strengthening of exhaust gas regulations for diesel vehicles, the fuel injection pressure is being increased. As the fuel injection pressure rises, the temperature of the diesel fuel also increases, raising concerns that it may damage fuel system components in some cases. To prevent damage to these fuel system components caused by the rise in diesel fuel temperature, it is necessary to cool the fuel. In response, our company has developed a diesel fuel cooler. This fuel cooler is designed to withstand the harsh environment under the vehicle, featuring high corrosion resistance and chip resistance. Furthermore, despite its simple brazeless structure made of aluminum pipes, fins, and brackets, it demonstrates very high fuel cooling performance. 【Features】 - High corrosion resistance and chip resistance to endure the harsh environment under the vehicle - Demonstrates very high fuel cooling performance For more details, please contact us or download the catalog.

• Cooling system

Usui International Industries Co., Ltd. successfully pioneered the use of plastic for automotive engine cooling fans in 1963 and began production. Since then, we have developed various blade shapes considering aerodynamic characteristics and adopted wing cross-sectional shapes through years of experience and unique technological capabilities, providing high airflow, low noise, and high-efficiency plastic cooling fans. Our plastic cooling fans are used in a wide range of industries, including automotive, construction machinery, and agricultural machinery. 【Features】 ○ With increasingly stringent exhaust gas regulations on the horizon, the cooling performance requirements for engines are becoming ever higher. ○ We are working on the development of even higher airflow and higher efficiency plastic cooling fans. For more details, please contact us or download the catalog.

• fan

The fan drive is a fluid clutch that controls the cooling fan for engine cooling at the appropriate rotational speed. A bimetallic element responds to the air temperature after passing through the radiator, adjusting the amount of silicone oil inside the fan drive to control the fan speed appropriately. It maintains the heat balance of the engine cooling system at all times, improving fuel efficiency and reducing fan noise. 【Features】 - By combining with a plastic cooling fan, cooling characteristics are improved, achieving excellent reliability. - The fan drive is available in a series tailored to the cooling performance of engines ranging from small to large classes, always providing the optimal combination of specifications. For more details, please contact us or download the catalog.

• clutch

The ECFD (Externally Controlled Fan Drive) uses an electromagnet instead of a bimetal to control the fan speed by inputting an electrical signal from an external source, as opposed to the conventional fan drive that relies on a bimetal responding to the air temperature after passing through the radiator. It incorporates information such as engine coolant temperature, engine speed, and fan speed into the ECU, calculates the ideal fan speed for the engine, and converts that information into an electrical signal to control the ECFD. 【Features】 - Always enables optimal fan speed control for engine cooling. - Improves fuel efficiency, enhances engine combustion efficiency, and reduces fan noise. - Offers a lineup of ECFDs ranging from small to large sizes. For more details, please contact us or download the catalog.

• Fan motor

The push rod of Usui International Industry Co., Ltd. is a hollow type product with an upper end (cup end) and a lower end (ball end) that are projection welded to both ends of a pipe. It allows for weight reduction compared to solid (integral) products, and it is also suitable for engines with internal lubrication mechanisms since it can be processed with holes in the upper and lower ends. By standardizing the components of the pipe, upper end, and lower end, we have achieved low prices and short delivery times. 【Features】 ○ Widely used in various engines for automobiles, agricultural machinery, construction machinery, ships, etc. ○ A large number of shipments to overseas markets including North America, Europe, and Asia, as well as domestically. For more details, please contact us or download the catalog.

• Other machine elements

Magnetic couplings are clutches that utilize the hysteresis phenomenon of magnets by placing permanent magnets and hysteresis materials facing each other with a slight gap in between. They have a torque constant transmission characteristic and can generate the same transmission torque semi-permanently by using permanent magnets. 【Features】 - There are 8 basic types depending on the size of the magnets, and by adjusting the gap between the magnets, the transmission torque can be varied, allowing for use with various specification torques. - Currently, they are used in various equipment such as railway facilities, semiconductor equipment, and pipe manufacturing equipment. For more details, please contact us or download the catalog.

• clutch
• Coupling