CONTROL APPARATUS FOR A HYBRID VEHICLE DRIVE SYSTEM

• US 20150321656A1
• Filed: 04/20/2015
• Published: 11/12/2015
• Est. Priority Date: 05/07/2014
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: KATO, Shingo, NISHIKAWA, Yukinobu, MORITA, Yoshinori
• Granted Patent: US 9,434,370 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/115 with planetary gears
• CPC Class Codes: B60W 10/18 including control of braking systems
• CPC Class Codes: B60W 10/182 including control of parking brakes
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 30/18027 Drive off, accelerating from standstill
• CPC Class Codes: B60W 30/19 Improvement of gear change, e.g. by synchronisation or smoothing gear shift
• CPC Class Codes: F16H 63/483 Circuits for controlling engagement of parking locks or brakes
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/93 Conjoint control of different elements

Abstract

Control apparatus for hybrid vehicle drive system including: first differential mechanism provided with a rotary element connected to engine and rotary element connected to a first electric motor; a second differential mechanism provided with a rotary element connected to second electric motor and a rotary element connected to output rotary member; first clutch configured to selectively connect rotary element of first differential mechanism connected to engine or first electric motor, to rotary element of second differential mechanism connected to output rotary member; manually operated shifting device; and parking lock mechanism provided with parking lock gear fixed directly or indirectly to output rotary member and rotary motion which is prevented when shifting device is placed in parking position, control apparatus including parking lock control portion configured to release parking lock gear for permitting rotary motion of parking lock gear while first clutch is placed in its engaged state.

Claims

1. A control apparatus for a hybrid vehicle drive system including:

a first differential mechanism provided with a rotary element connected to an engine and a rotary element connected to a first electric motor;

a second differential mechanism provided with a rotary element connected to a second electric motor and a rotary element connected to an output rotary member;

a first clutch configured to selectively connect the rotary element of said first differential mechanism connected to said engine or said first electric motor, to a rotary element of said second differential mechanism connected to said output rotary member;

a manually operated shifting device; and

a parking lock mechanism provided with a parking lock gear which is fixed directly or indirectly to the output rotary member and a rotary motion of which is prevented when the shifting device is placed in a parking position, said control apparatus comprising;

a parking lock control portion configured to release said parking lock gear for permitting the rotary motion of the parking lock gear while said first clutch is placed in its engaged state.

2. The control apparatus according to claim 1, wherein the hybrid vehicle drive system further includes a second clutch which is placed in its engaged state to hold constant a ratio of an output speed of said first differential mechanism to a speed of a rotary motion received by the first differential mechanism from said engine,

and wherein said parking lock control portion releases said parking lock gear for permitting the rotary motion of the parking lock gear while said second clutch is placed in its engaged state.

3. The control apparatus according to claim 1, wherein said hybrid vehicle drive system further includes a brake configured to selectively connect a rotary element of said first differential mechanism connected to said first electric motor or a rotary element of said second differential mechanism connected to said output rotary member to a stationary member,

and wherein said parking lock control portion releases said parking lock gear for permitting the rotary motion of the parking lock gear while said brake is placed in its engaged state.