Patent ID: 8874289
Filing Date: 2014-10-28
Classification: B60K,B60W,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 adjusts 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 changes a connection state of an output shaft of said electric motor to any one from two or more of an input-side-connection state, an output-side-connection state, and a non-connection state, required driving torque obtaining means for obtaining a required driving torque which is a driving torque required by a driver of said vehicle, based on an operation of an acceleration operating member by said driver; determining means for determining whether or not a changeover condition of said connection state of said output shaft of said electric motor is satisfied; and control means for controlling, based on at least said required driving torque, a torque of said output shaft of said internal combustion engine and a torque of said output shaft of said electric motor in such a manner that a sum of an internal-combustion-engine-side-output-torque and an electric-motor-side-output-torque becomes equal to said required driving torque, said internal-combustion-engine-side-output-torque being a torque which is transmitted to said output shaft of said transmission and which is owing to a torque of said output shaft of said internal combustion engine, and said electric-motor-side-output-torque is a torque which is transmitted to said output shaft of said transmission and which is owing to said torque of said output shaft of said electric motor, and for controlling said change over mechanism when and after said changeover condition is satisfied, wherein, said control means, when and after said changeover condition is satisfied, adjusts said torque of said output shaft of said internal combustion engine and said torque of said output shaft of said electric motor in such a manner that said sum of said internal-combustion-engine-side-output-torque and said electric-motor-side-output-torque becomes equal to said required driving torque over a changeover adjusting period which is a period in which said torque of said output shaft of said internal combustion engine and said torque of said output shaft of said electric motor are adjusted with respect to a changeover operation of said connection state of said output shaft of said electric motor, and in such a manner that a period in which said torque of said output shaft of said electric motor continues to be zero or a value close to zero is included within said changeover adjusting period, and so as to control said changeover mechanism in such a manner that said changeover operation is performed in said changeover adjusting period, wherein said control means adjusts said torque of said output shaft of said internal combustion engine and said torque of said output shaft of said electric motor, in a case in which said connection state of said output shaft of said electric motor is in one of said input-side-connection state and said output-side-connection state, and when and after said changeover condition of the electric-motor-connection-state for changing from said one of said input-side-connection state and said output-side-connection state to the other one of said input-side-connection state and said output-side-connection state is satisfied, in such a manner that said changeover adjusting period is composed of a first period, a second period, and a third period, so as to control said changeover mechanism in such a manner that said changeover operation starts, at a changing time from said first period to said second period, or at a time close to said changing time from said first period to said second period, and ends at a changing time from said second period to said third period, or at a time close to said changing time from said second period to said third period.