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Each component of an engine has different operating environments and performance requirements. In the same way, bearings are also required to have many features, including vibration-resistance, high-speed rotation, high-temperature resistance and high-environmental resistance. JTEKT provides a wide variety of bearings developed leveraging technologies accumulated hand-in-hand with advancements in the automotive industry.
In recent years, a demand has emerged to respond to global needs, including extremely cold regions, and achieve better fuel efficiency, weight and size reduction assuming use in the ultra-low temperature of minus 40 degrees Celsius.
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Used as a mechanism to transmit the camshaft motion to the intake/exhaust valve.
The fatigue strength of the transfer surface is improved through special surface treatment to minimize damage to counterpart components.
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Used in the variable valve mechanism for realizing efficient suction and exhaust flows.
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The balance shaft used in a poor lubrication environment is supported with a small amount of torque in order to improve the reliability of balance shaft movement.
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The idler pulley is used for layout of auxiliary machine belts and tension adjustment.
It can adapt to road conditions and severe weather conditions, and offers the features of high-speed rotation, high heat-resistance and water resistance.
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These bearings require high sealing performance due to being used inside water pumps.
A highly reliable air tight seal is adopted, which substantially improves sealing performance and achieving a long service life.
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A long service life in high-temperature, high-speed rotation environments is demanded of bearings used in alternators.
Grease with improved vibration resistance was developed and adopted to realize a long service life.
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While the belts of auxiliary machines are susceptible to slip and flutter due to variation in the engine speed, an alternator pulley with a built-in one-way clutch can suppress belt flutter.
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Used in the part supporting rotation of the compressor pulley of the air conditioner.
Offers water resistance under severe water splashes and low-torque performance.
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The bearings in the compression mechanism of compressors are submerged in refrigerant. As such, the bearings need to operate in diluted lubrication. JTEKT, however, has developed highly durable, low-torque bearings capable of operating in diluted lubrication as a result of improvements to design specifications.
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Bearings adopting an ultra-long-life ceramic ball bearing with excellent ultra high-speed, high-temperature and resistance to foreign matter. With ceramic balls and a heat-resistant raceway and retainer, both high-temperature resistance and high-speed characteristics are realized.
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Various oil seals are used in the engine and peripheral components to assist smooth bearing operation.
