Strategies for Energy Savings with Use of Constant and Variable Oil Pump Systems

Automotive lubrication systems have been studied for long time, looking for improving its efficiency and reduce power consumption. On this context, the oil pump plays an important role, because most of the actual systems are made of constant flow pumps, with a relief valve to make a recirculation of the excess of flow, which is an important point of losses. On this paper we describe the actual pumping systems in terms of design and application and compare them with the new variable pumps.