Intake and exhaust control motor bearings
Seiko car for the intake and exhaust throttle control motor and EGR (Exhaust Gas Re-circulation System) motor , developed a low torque grease sealed bearings . Generally, in order to reduce the torque , the running average is performed when the motor assembly is rotated in order to reduce the initial resistance of grease to reduce the viscosity of the base oil component . However, the problem with this approach is : not only the running rotation time consuming, but also reduces the viscosity of the base oil , when used at high temperatures will shorten the life . Therefore, the company by adding nano- particles in the grease to reduce grease resistance. Thus , compared with the original , not only to stabilize the torque quickly , even at high temperatures and can maintain a longer life.
Is added to the grease ceramic particles , " whereby the base oil as a component connected together like a chain , so that the performance of grease stronger ." The specific name of the substance and the particle size were not disclosed . Since in the previous grease can enter into the convey weak shear surface, the greater the amount of the grease adhering to the balls and the raceway surface . Newly developed grease entering the conveying surface must have a strong shearing force , and therefore the amount of deposition of the grease ball and the raceway surface of the right .
This will stabilize the initial torque in a short time , the 70% reduction in run- rotation time than before . Further , a constant torque of 30% less than before ( 100 ℃, the use ) . But also achieved with the same or higher before sintering grease life.
