自動車用動力伝達系の摩擦損失に関する研究 : 第1報, 損失測定法とその適応範囲

抄録

Recently, in attempts to improve the automobile fuel economy, various measures such as improvement of engine thermal efficiency and a decrease in vehicle weight have been undertaken. It is necessary to improve the efficiency by not only using lower viscosity gear oil, but also by making clear the power loss in automotive drive train. This paper proposes a method for measuring the power loss in automotive drive train which is based on the temperature rise of the lubricant due to the friction in the drive train. The applicable limit of this method is made clear. Namely, in the case that the lubricant temperature and difference in temperature between the lubricant and the wall increase as time increases, the power loss can be used to calculate the difference in the rate of lubricant temperature both with and without an element. Applying this method to an automotive axle, the effect of input torque, speed and lubricant temperature on gear loss was made clear.