Patent ID: 8171824
Filing Date: 2012-05-08
Classification: B60K,B60W,B60Y,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 when said transmission is in a power-transmission-state for a forward driving of said vehicle or for a reverse driving of said vehicle; a changeover mechanism which is capable of changing a connection state 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, a clutch mechanism, disposed between said output shaft of said internal combustion engine and said input shaft of said transmission, and being capable of changing a state-of-connecting between said output shaft of said internal combustion engine and said input shaft of said transmission from a shut-off-state to break said power transmission path between said output shaft of said internal combustion engine and said input shaft of said transmission to a connection-state to provide said power transmission path between said output shaft of said internal combustion engine and said input shaft of said transmission, or vice versa; a shift operation member operated by a driver of said vehicle to control a state of said transmission; and control means for controlling said transmission and said clutch mechanism based on a driving condition of said vehicle and a condition of said shift operation member, and for controlling said changeover mechanism base on said driving condition of said vehicle: and wherein, said control means is configured so as to change said state-of-connecting of said clutch mechanism from said connection-state to said shut-off-state and so as to change said connection state of said changeover mechanism from a state other than said non-connection state to said non-connection state, upon changing of said condition of said shift operation member from a condition for said forward driving or for said reverse driving to a condition in which a both-neutral-state is required, said both-neutral-state being a state in which neither said power transmission path between said output shaft of said internal combustion engine and said output shaft of said transmission, nor said power transmission path between said output shaft of said electric motor and said output shaft of said transmission is provided, in a period in which (1) said condition of said shift operation member is in said condition for said forward driving or for said reverse driving, (2) said state-of-connecting of said clutch mechanism is in said connection-state, (3) said transmission is in said power-transmission-state, and (4) said connection state of said changeover mechanism is in said state other than said non-connection state.