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Control system for power transmission unit

A power transmission device and control system technology, applied in the field of control systems, can solve problems such as difficult to start the engine

Inactive Publication Date: 2016-08-24
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the hybrid drive system taught by Japanese Patent Laid-Open JP No. 2011-255889, if the switching mechanism is stuck in the neutral position for some reason, it is difficult to start the engine by the first motor

Method used

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  • Control system for power transmission unit
  • Control system for power transmission unit
  • Control system for power transmission unit

Examples

Experimental program
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Embodiment Construction

[0017] Referring now to the accompanying drawings in detail, Figure 4 A preferred example of a drive train of a hybrid vehicle is shown. Such as Figure 4 As shown, the prime mover of the hybrid vehicle includes an engine (ENG) 1, and two motor generators (MG1, MG2) 2,3. In a preferred example, the driving force generated by the engine 1 is selectively transmitted to the power transmission mechanism 5 , thereby transmitting the driving force to the drive wheels 4 .

[0018] The power transmission mechanism 5 includes: a transmission 6 adapted to switch its gear stage between at least a high-speed stage and a low-speed stage; and a power distribution device 7 that transfers power transmitted from the engine 1 via the transmission 6 Distributed to the first motor generator 2 side and the output side. For example, a gear transmission, a roller transmission, a belt transmission, etc. can be used as the transmission 6, and, in Figure 4 In the illustrated example, a single pin...

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PUM

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Abstract

A control system for a power transmission unit to start an engine by a motor even if one of the engagement elements cannot be engaged or disengaged. If a rotational speed of the engine cannot be raised to a predetermined speed during motoring even if sending out an initial command for disengaging one of the engagement elements while engaging other engagement element, the control system sends out an alternate command for engaging said one of the engagement elements while disengaging said other engagement element to bring the engine into an allowable condition to be started (steps S1 to S9).

Description

technical field [0001] The present invention relates to a control system for a power transmission device, and more particularly, to a control system for controlling a transmission having at least two engaging elements for switching gear stages, the transmission being connected to to the output shaft of the engine. Background technique [0002] An example of such a power transmission device is described in Japanese Patent Laid-Open JP No. 2011-255889. The hybrid drive system taught by Japanese Patent Laid-Open JP No. 2011-255889 includes a transmission adapted to switch a gear stage between a low speed stage (low gear) and a high speed stage (high gear), a switch for switching the gear stage mechanism, a power distribution mechanism for distributing the torque of the transmission to the first motor and the output shaft, and the second motor arranged on the output shaft. The electric power generated by the first motor is supplied to the second motor, and the torque of the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02N11/04F02N15/02F02N15/04B60L50/16
CPCF02N11/006F02N11/04F02N11/0814F02N15/003F02N15/022F02N15/046F16D48/06F16D2500/50227F16D2500/5114F16D2500/7041B60K6/365B60K6/387B60K6/445B60K2006/268B60K2006/381B60W10/02B60W10/06B60W10/08B60W20/00B60W20/40B60W20/50B60W50/029B60W2050/0295B60W2510/0638F02N11/00F16D21/00Y02T10/62F02N15/025F16H37/0833
Inventor 加藤春哉田川洋辅今村达也田端淳
Owner TOYOTA JIDOSHA KK