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Xiangyang Yingpai Ronghua Bearing Co., Ltd.
Address:No.288 Zuanshi Road Xiangyang Hubei China
Tel:86-710-3381844
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Needle Roller Bearings NTN developed a new engine technology that can significantly reduce the frict
NTN (NTN) for automotive engine crankshaft and camshaft support portion developed compared with the original plain bearings , dramatically reducing the friction torque of the " low-friction needle roller bearings ." Compared with sliding bearings, the starting torque is reduced to approximately 90% , while the rotational torque decreases by about 50 %. Accordingly, if the bearing is used for both the crankshaft and camshaft, it is estimated at about 10.15 mode fuel efficiency of vehicles can be increased by 3 %. Further, since the pump flow can be reduced and the load of the starter , it is possible to achieve miniaturization and Accessories weight.
In recent years , environmental considerations , in the field of automobile engine , is gradually reduced by the viscosity of the oil , reducing friction to improve fuel efficiency , and the shaft support portion in order to reduce the friction of various types requires the use of rolling bearings. However , the crank shaft and the crank arm and the camshaft includes a cam bearing larger in diameter than the other parts, is difficult to install a common axial bearing body , thereby greatly reducing the need for a cross-sectional structure. Therefore , most of the crank shaft using a split sliding bearings , camshafts are made of aluminum alloy sliding bearing and shaft structure directly .
Needle bearing portion for supporting the crankshaft in a dual structure of the partitioned cage and the outer ring , the outer ring is divided using a newly developed method to achieve high accuracy , the sectional shape and a thickness of 2mm only . In addition , the engine uses a special cage design improves the resistance to burning and strength.
On the other hand , for the camshaft bearing supporting part in the split -type structure with a double tiles of the outer ring ( called the Half Shell) and single- split type resin material cage. By using stamping tiles into outer , outer ring can be reduced to a minimum thickness of 0.6mm, saving space.
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