ECFD™ is a fan drive with the rotation speed controlled via electrical signal externally fed to solenoid valve, while conventional Fan clutch is self-controlled using bi-metal sensing air temperature passing through the radiator. Several related data, such as temperature of engine cooling fluid, engine rotation speed, and cooling fan rotation speed are fed into ECU. ECU calculates desirable fan speed at each moment and transmits it as control signal to ECFD™ in electrical signal form so as to maintain fan rotation speed in desired condition.

Thereby, fan is operated with optimal speed for the engine under any operation statuses. This could lead a vehicle equipped with ECFD™ to increasing overall fuel economy, higher engine efficiency, decreasing fan noise, and more.

USUI is continuing ECFD™ development in order to commercialize all sizes to cover all engine sizes.

Fan clutch is a fluid clutch to adequately control rotation frequency of the fan for engine cooling.

Temperature-sensitive bi-metal, which detects air temperature passing through the radiator, controls working silicone oil volume in the drive so that fan rotation frequency is kept adequately in controlled manner. It works to maintain the heat balance of the engine cooling system within a range and helps increase fuel economy and decrease fan noise, as well.

The combination of our Plastic Cooling Fan with Fan clutch could offer improved cooling performance with higher reliability.
From light duty to heavy duty trucks, USUI had commercialized various sizes of fan drives according to required cooling capacities on various engine out-put. At any time, for almost all sizes of engines, the best combination of fan and fan drive can be provided within USUI standard items.

In 1963 USUI successfully developed the world's first plastic made fan for automobile engine cooling and has been manufacturing the Plastic Cooling Fan since then.

In order to provide a highly efficient plastic cooling fan with more airflow rate and less noise, we have developed a various type of blade configuration adopting airfoil profile and considering aerodynamic characteristic based on our years of experience and proprietary technology. USUI Plastic Cooling Fan has been used not only for automobile engines, but for almost all engines such as construction equipment, agricultural equipment, and general industrial equipment.

Apparently the increasing stringent diesel emission regulations might ask for the higher performance on engine cooling.

USUI is continuously developing higher efficient plastic cooling fans with higher airflow to meet the requirement.

BreFin TUBE™ is our product broadly used for hydraulic oil piping with coolability, such as power steering oil piping and engine oil piping.
The tube is manufactured “fin to be coiled on plain tube continuously in helical shape and then copper brazed the fin to the tube in brazing furnace”.
BreFin TUBE™ offers exceptional cooling performance, due to the extended surface provided by the fin. Further more, based on our accumulated know-how from extensive experiences as a tube specialist company, we will provide suggestions for your selection from various materials used and surface treatments applied according to your application and also assist with your heat transfer area calculations.

USUI Push Rod is a hollow bar type product, which consists of a short tube with an upper end (cup shaped) and a lower end (ball shape). On a tube end, an upper end is joined and on another end, a lower end is joined with projection weld.

Comparing with conventional “solid” bar type push rods, USUI Push Rod is inherently light. If required, both ends will have a through-hole by drilling. It is suitable for applying internal lubrication type engines.
Lower price with shorter delivery on the products had realized through standardization of all three components, i.e. pipes, upper ends, and lower ends.

USUI Push Rod has been adopted on engines for various fields such as automobiles, agricultural machines, construction machines, and marines. Many push rods are shipped from USUI not only to domestic market, but also to worldwide markets, North America, Europe, and Asia.

EGR(Exhaust Gas Recirculation) Tube returns a part of exhaust gas in the engine.

USUI EGR tube is a stainless tube which has an excellent heat resistance and corrosion resistance. Austenitic stainless steels and Ferritic stainless steels available. For the joint, we will meet customer requests such as brazed flange. Bellows process is also possible if needed.

OIL & WATER TUBE for Turbo charger is a pipe offering a flexible connection with high heat and high corrosion resistance as a supercharger in supporting low fuel consumption technology as well as high output of engine.

Technology of Gasoline Direct Injection system is expanding in order to improve efficiency of gasoline engine. Meanwhile, wide variety of fuels such as ethanol blended fuel is also gradually being distributed.

Our “High Pressure Fuel Tubes for Gasoline Direct Injection” is a stainless steel tube to be used for high pressure gasoline fuel that requires high leak tightness.

USUI also offers Fenikel®-steel tube which have further fuel corrosion resistance, in addition to having higher pressure capability.

AHI (After treatment Hydrocarbon Injection) Tube

AHI(After treatment Hydrocarbon Injection) tube is for diesel combustion burner systems.
To regenerate DPF for diesel engines, the exhaust temperature is raised by injecting fuel into the exhaust gas and igniting it, leading to the combustion of soot inside the DPF.

AHI tube is used in severe environments in which it is exposed to high temperatures; however, it's robust reliability is a result of utilizing stainless steel and the brazing technology that USUI has developed.

UL-FLEX™ is a flexible tube that has excellent flexibility and can flexibly absorb relative displacement between installations. Our unique ByPitch construction method provides a high degree of freedom in piping design, allowing us to respond to prototype production and construction changes in a short period of time.

The highly flexible UL-FLEX™ is effective in locations where displacement occurs due to thermal strain during installation or operation, such as connecting piping used in engines. It is possible to process as many bellows in the desired position as desired.

As an approach for reducing fuel evaporative emission, adopting fuel returnless system on gasoline engine vehicles are considerably increased. The system adopted will cause larger fuel pressure pulsation and therefore pulsation dampening should be required on the fuel rail.

As UFRID™ possesses effective self-dampening capability to the pulsation with rail's own self, unpleasant vehicle interior noise induced by the pulsation could be prevented without pulsation dampener. Due to giving much smaller volume elasticity on the rail than those of fuel, the rail absorbs pulsation energy generated at gasoline injection. Balance of stiffness (i.e. volume elasticity) and strength on the rail is optimized so that we can obtain both the required energy absorption performance and necessary mechanical strength on the rail.

When applying UFRID™ in your system, you should enjoy the reductions of system cost and weight because the pulsation dampener can be eliminated from the system.

USIT™-SP is the world's first tube which was adopted for common rail diesel fuel injection systems among several high-pressure injection tubes. The Common rail fuel injection system plays a very important role in diesel emission control today.

To support the constant advancement of diesel engine technology, USIT™-SP has the world's highest level withstanding pressure fully utilizing USUI proprietary technologies such as plasticity processing, heat treatments, and smoothing on inner surface. USIT™-SP has a very high level of cleanliness through skillfully applying cleaning techniques that were developed in-house to efficiently remove contaminants on tube surface.

USIT™-SP wins the high regards of auto-manufacturers, and is adopted on more than half of diesel engines in the world that are equipped with common rail.

To deal with stringent diesel emission regulations in the near future, operation pressure of common rail, which is around 200MPa injection pressure currently used, should obviously be increased further in next generation system.

As the leading maker of fuel injection tubes, USUI has already developed tubes to be used for 250MPa or more common rail system pressure.

Feature

Magnetic Coupling is a clutch applying hysteresis in magnet. In clutch, permanent magnets and hysteresis material are put together facing each other closely but not contacting. These clutches have a constant torque feature. And also the limit on transmitting torque is very stable through the service life, virtually un-limited life since permanent magnets are used.

8 basic types are available according to differences in magnet size to be mounted on.

The transmitting torque limit can be adjusted through adjusting the gap distance between magnets and hysteresis material. Thus USUI Magnetic Coupling can be adopted in a wide range of required transmitting force.

USUI Magnetic Coupling has been used successfully in many applications such as railroad facilities, semiconductor processing facilities, and pipe making facilities.

U-TIGHTSEAL™

U-TIGHTSEAL® is a metal gasket with a built-in elastic core (coil spring). Although it is made of metal, it exhibits properties similar to elastomer (rubber) due to its excellent compression and recovery properties.

The shape is a ring with a circular cross section, and the structure consists of a tightly wound elastic core in the center, which is covered with one or two layers of covering.
The outer coating is made of a familiar, ductile metal, and the inner coating, in the case of two layers, is made of a relatively hard metal.

This product is used in applications such as vacuum and ultra-high vacuum, accelerator facilities, nuclear power, space engineering, and valves, where the use of elastomer O-rings and gaskets is prohibited due to issues such as temperature, corrosion, pressure, radiation, gas release, and durability requirements. Can be used in restricted locations.

Heat Exchanger

Thanks to the best tube layout and proprietary baffles, which are equipped with press formed collars, the exchangers have higher heat exchanging performance and superior vibration durability.

Corrosion resistant materials are used for both sides, of exchangers, primary and secondary. Hence, the exchangers might be applied to various types of fluids. Due to fixed-tube-sheet construction, there is no floating part or seal portion such as o-ring. Hence the exchanger could have superior reliability and durability.

In order to allow the most economical selection, USUI had commercialized a series of standard items for respective needs, in heat transfer area: 0.1 m² to 11 m² and also in tube pass: 1 pass, 2 passes, and 4 passes. To fit with existing piping layout provided by user, 90 or 180 deg.-rotated design is available on shell side nozzle orientation.