Patent ID: 8388496
Filing Date: 2013-03-05
Classification: B60K,B60L,B60W,F16H,Y02T,Y10T

Abstract:
1. A vehicular power transmission control apparatus applied to a vehicle comprising an internal combustion engine and an electric motor as power sources, comprising: a transmission including an input shaft to provide a power transmission path between said input shaft of said transmission and an output shaft of said internal combustion engine, and an output shaft to provide a power transmission path between said output shaft of said transmission and drive wheels of said vehicle, wherein said transmission is capable of adjusting a transmission reduction ratio which is a ratio of a rotational speed of said input shaft of said transmission to a rotational speed of said output shaft of said transmission; a changeover mechanism which is capable of changing a connection state of an output shaft of said electric motor to any one from alternatives comprising two or more of an input-side-connection state, an output-side-connection state, and a non-connection state as an essential state, said input-side-connection state being a state in which a power transmission path is provided between said output shaft of said electric motor and said input shall of said transmission, said output-side-connection state being a state in which a power transmission path is provided between said output shaft of said electric motor and said drive wheels without involving said transmission, and said non-connection state being a state in which neither a power transmission path between said output shaft of said electric motor and said input shaft of said transmission, nor a power transmission path between said output shaft of said electric motor and said output shaft of said transmission is provided; state-representing-amount obtaining means for obtaining, as a state-representing-amount or as state-representing-amounts, one or more of a temperature of a battery which supplies an electric energy to said electric motor, a temperature of said electric motor, and a battery remaining level indicative of an amount of an energy stored and remained in said battery; and control means for selecting a target connection state of said output shaft of said electric motor from said connection states which said changeover means can realize, based on said obtained state-representing-amount or said state-representing-amounts and a parameter indicative of a running condition of said vehicle other than said state-representing-amount or said state-representing-amounts, in such a manner that an amount of time that said non-connection state is selected varies, and for controlling said changeover means in such a manner that an actual connection state of said output shaft of said electric motor coincides with said connection state selected as said target connection state.