Patent ID: 9031726
Filing Date: 2015-05-12
Classification: B60K,B60W,Y02T,Y10S

Abstract:
1. A method for operating a pre-lubrication system for an internal combustion engine (ICE) of a hybrid electrical vehicle after vehicle start up, wherein the hybrid electrical vehicle comprises an electric engine (EE) and the ICE, wherein the EE is turned on at vehicle start up and the ICE is turned on at vehicle start up or after a period of time after vehicle start up at least when the driver requests, or is presumed to request, torque equal to or higher than a predetermined torque threshold, wherein the ICE is used together with the EE or instead of the EE, and wherein the pre-lubrication system comprises an engine control function for controlling the ICE, monitoring the torque requested by the driver and storing information regarding when the driver requests torque equal to or higher than the predetermined torque threshold as torque/time information data set, the method comprising the following operations, controlled and initiated by the engine control function: after vehicle start up and EE start up, controlling the stored torque/time information data set; based on selected data from the stored torque/time information data set, estimating when the driver will request the predetermined torque threshold, being an estimated time of ICE torque delivery; based on the estimated time of ICE torque delivery, initiating a cranking operation of the engine in order to build up oil pressure in the ICE and filling an engine oil circuit with oil, wherein the cranking operation in order to build up oil pressure in the ICE and filling an engine oil circuit with oil is initiated and completed before the estimated time of ICE torque delivery; and monitoring of when the driver requests at least the predetermined torque threshold, being an actual time of ICE torque delivery, and storing the actual time of ICE torque delivery together with the torque/time information data set.