CONTROL APPARATUS FOR DYNAMIC POWER TRANSMISSION APPARATUS

• US 20170008510A1
• Filed: 07/08/2016
• Published: 01/12/2017
• Est. Priority Date: 07/10/2015
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Hiasa, Yasuhiro, Imai, Keita, IMAMURA, Tatsuya, Tabata, Atsushi, Okuda, Koichi, Matsubara, Tooru, Kitahata, Takeshi
• Granted Patent: US 10,066,718 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60K 17/02 characterised by arrangement, location, or kind of clutch
• CPC Class Codes: B60K 28/165 acting on elements of the vehicle drive train other than the propulsion unit and brakes, e.g. transmission, clutch, differential acting on brakes B60T8/17
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 15/10 for automatic control superimposed on human control to limit the acceleration of the vehicle, e.g. to prevent excessive motor current electric devices for safety purposes B60L3/00
• CPC Class Codes: B60L 15/2054 by controlling transmissions or clutches
• CPC Class Codes: B60L 2260/14 of transmissions
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/25 by controlling the electric load
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2300/82 Torque vectoring
• CPC Class Codes: F16H 2200/2007 with two sets of orbital gears
• CPC Class Codes: F16H 2200/2038 with three engaging means
• CPC Class Codes: F16H 3/728 with means to change ratio in the mechanical gearing
• CPC Class Codes: F16H 37/0833 with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths F16H3/72 takes precedence
• CPC Class Codes: F16H 61/48 hydrodynamic
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility

Abstract

A control apparatus for a dynamic power transmission apparatus is provided. The dynamic power transmission apparatus includes a differential mechanism, an electric generator, an electric motor, and a fluid coupling. The electric motor is disposed at a position apart from a transmission path along which a dynamic power of an engine is transmitted to a driving wheel. The fluid coupling is disposed between the electric motor and the transmission path. The control apparatus includes an electronic controller configured to restrict a charge of an electric storage apparatus with an electric power generated by the electric generator, depending on a state of the electric storage apparatus, and control the fluid coupling to differentially rotate and to drive the electric motor by the electric power such that a dynamic power loss is generated in the fluid coupling, when restricting the charge of the electric storage apparatus.

Claims

1. A control apparatus for a dynamic power transmission apparatus, the dynamic power transmission apparatus including a differential mechanism, an electric generator, an electric motor, and a fluid coupling, the differential mechanism divides dynamic power output by an engine to a driving wheel and the electric generator, the electric generator generates electric power such that the electric motor is driven by the electric power and torque of the electric motor is output to the driving wheel and to charge an electric storage apparatus with some of the electric power, the electric motor being disposed at a position apart from a transmission path along which the dynamic power of the engine is transmitted to the driving wheel through the differential mechanism, the fluid coupling being disposed between the electric motor and the transmission path, the control apparatus comprising:

an electronic controller configured to restrict the charge of the electric storage apparatus with the electric power generated by the electric generator, depending on a state of the electric storage apparatus, and the electronic controller is configured to control the fluid coupling to differentially rotate and to drive the electric motor by the electric power such that a dynamic power loss is generated in the fluid coupling, when restricting the charge of the electric storage apparatus.

2. The control apparatus according to claim 1, wherein the electronic controller is configured to control the torque of the electric motor such that a power, which is of power output by the engine and with which the electric storage apparatus is incapable of being charged, is equal to a power of the dynamic power loss by differential rotation of the fluid coupling.

3. The control apparatus according to claim 1, wherein the electronic controller is configured to control the torque of the electric motor such that a sum of a torque to be transmitted to the driving wheel through the transmission path and a torque to be transmitted to the transmission path through the fluid coupling is maximized, when the engine outputs a predetermined power.

4. The control apparatus according to claim 1, wherein the differential mechanism includes a first rotation element, a second rotation element, and a third rotation element, the differential mechanism performs a differential action with the first rotation element, the second rotation element, and the third rotation element, the first rotation element to receive a torque of the engine, the second rotation element being linked with the electric generator, the third rotation element to output a torque to the driving wheel, and the fluid coupling adds the torque from the electric motor to the torque output from the third rotation element.