Control device for vehicular power transmitting apparatus
First Claim
1. A control device for a vehicular power transmitting apparatus, whereinthe vehicular power transmitting apparatus comprises (i) an electrically controlled differential portion including a differential mechanism, composed of a plurality of rotary elements, whose differential state is controlled upon controlling an operating state of a differential-action controlling electric motor connected to one of the plurality of rotary elements in a power transmissive state, and (ii) a differential-state switching device configured to selectively switch the differential mechanism into a non-differential state for disenabling a rotation of a certain rotary element among the plurality of rotary elements or causing a whole of the plurality of rotary elements to move in a unitary rotation and a differential state for permitting the plurality of rotary elements to rotate relative to each other to initiate a differential action;
- andthe control device is configured to alter a differential-mechanism switching condition for determining whether to switch the differential mechanism to the non-differential state or the differential state depending on a kind of fuel used in an internal-combustion engine connected to the vehicular power transmitting apparatus in the power transmissive state,wherein the differential-state switching device switches the differential mechanism to the non-differential state, using an engagement of a mechanical coupling device, by disenabling the rotation of the certain rotary element among the plurality of rotary elements or causing the whole of the plurality of rotary elements to move in the unitary rotation.
1 Assignment
0 Petitions
Accused Products
Abstract
A control device is disclosed which can obtain increased fuel economy performance depending on a kind of fuel in a vehicle having an internal combustion engine and an electric motor when the kind of fuel supplied to the internal combustion engine is altered. A determining vehicle speed (V1) and determining output torque (T1), representing a boundary value with which a step-variable control region and a continuously variable control region of a shifting mechanism (10) are demarcated, are altered such that the higher the mixing ratio of ethanol, the lower will be the determining vehicle speed (V1) and determining output torque (T1). Therefore, the determination is made whether to operate a first electric motor (M1) depending on the mixing ratio of ethanol, making it possible to obtain increased fuel economy performance in line with the mixing ratio of ethanol.
-
Citations
23 Claims
-
1. A control device for a vehicular power transmitting apparatus, wherein
the vehicular power transmitting apparatus comprises (i) an electrically controlled differential portion including a differential mechanism, composed of a plurality of rotary elements, whose differential state is controlled upon controlling an operating state of a differential-action controlling electric motor connected to one of the plurality of rotary elements in a power transmissive state, and (ii) a differential-state switching device configured to selectively switch the differential mechanism into a non-differential state for disenabling a rotation of a certain rotary element among the plurality of rotary elements or causing a whole of the plurality of rotary elements to move in a unitary rotation and a differential state for permitting the plurality of rotary elements to rotate relative to each other to initiate a differential action; - and
the control device is configured to alter a differential-mechanism switching condition for determining whether to switch the differential mechanism to the non-differential state or the differential state depending on a kind of fuel used in an internal-combustion engine connected to the vehicular power transmitting apparatus in the power transmissive state, wherein the differential-state switching device switches the differential mechanism to the non-differential state, using an engagement of a mechanical coupling device, by disenabling the rotation of the certain rotary element among the plurality of rotary elements or causing the whole of the plurality of rotary elements to move in the unitary rotation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- and
-
15. A control device for a vehicular power transmitting apparatus wherein
the vehicular power transmitting apparatus comprises at least one running-drive motor connected to or connectable to drive wheels in a power transmissive state and is configured to allow a running state of a vehicle to be selectively switched into a motor-drive mode, in which only the running-drive motor is used as a drive-force source to cause the vehicle to run with an internal-combustion engine placed in a halted state, and a normal running mode in which the vehicle is caused to run with the internal-combustion engine placed in an operating state; - and
the control device is configured to alter a running-state switching condition for determining whether to switch the running state of the vehicle to the motor-drive mode or the normal running mode depending on a kind of fuel used in the internal-combustion engine, wherein a boundary line between a motor-drive mode region for executing the motor-drive mode and a normal running mode region for executing the normal running mode is altered depending on the kind of fuel used in the internal-combustion engine. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
- and
Specification