Help improve fuel/electricity efficiency for various modes of transportation: ICE HEV, PHEV, and EV
● Reduce rolling friction by optimizing the number of rollers
● Reduce friction by an average of 20% throughout the entire speed range, thereby improving fuel/power consumption throughout the entire vehicle speed range
● The new roller quantity optimization technology is also applicable to existing models of low friction tapered roller bearings
Domax Corporation has developed the 7th generation low friction tapered roller bearings. This product can reduce friction by an average of 20% throughout the entire speed range, thereby improving fuel/electricity consumption and helping to increase vehicle range. Domax's goal is to achieve an annual sales revenue of 15 billion yen for this product (including existing models) by 2030.
1. Background
Conical roller bearings are commonly used in low speed and high load situations on the tire side. Therefore, reducing the friction of roller bearings helps to improve the efficiency of power transmission systems.
one WLTC: The globally unified light vehicle test cycle, an internationally recognized fuel economy measurement method, was adopted by the Japanese Ministry of Land, Infrastructure, Transport in 2017. Under the previous method of determining fuel economy values (JC08 cycle), the average fuel consumption was measured over the entire range of low to high speeds. But in the WLTC cycle, measurements are taken at various speeds such as in cities, suburbs, and highways.
1) Optimize the number of rollers, reduce rolling friction, and reduce friction by an average of 20% throughout the entire speed range
2) This new specification can be produced using existing equipment, Domax plans to immediately provide it to customers in order to quickly push it to the market.
3) Domax will also apply new roller quantity optimization techniques to existing models of low friction tapered roller bearings.
1) Pay attention to service life and optimize the number of rollers in tapered roller bearings
Conical roller bearings have strong anti pollution ability and longer service life. Domax has confirmed through new testing that the actual service life of tapered roller bearings is even longer than the calculated service life.
2) Solve and optimize the number of rollers related issues
Domax has years of professional knowledge in special crown technology and cages suitable for thin lubrication conditions to solve problems such as excessive surface pressure and stuck roller ends, and uses this expertise to optimize the number of rollers.