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Shift range control device

A technology of control devices and gears, applied in the direction of transmission control, elements with teeth, belts/chains/gears, etc., can solve problems such as motor locking or accidental handling

Active Publication Date: 2020-11-24
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Incidentally, when one motor is driven by multiple systems, if an abnormality occurs in a part of the multiple systems, such as due to the disturbance of the normal system by the abnormal system, This condition may result in the motor being locked or accidentally handled

Method used

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Examples

Experimental program
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Effect test

no. 1 example

[0030] The gear shift control device of the present invention will be described below with reference to the drawings. In the plurality of embodiments described below, substantially the same components are denoted by the same reference numerals to omit repeated descriptions. in Figure 1 to 11 The first embodiment is shown in. Such as figure 1 with 2 As shown, the shift-by-wire system 1 includes a motor 10, a gear-shifting gear switching mechanism 20, a parking lock mechanism 30, a gear-shifting control device 40, and the like.

[0031] The electric motor 10 is rotated by electric power supplied from a battery mounted on a vehicle (not shown), and is used as a power source of the shift position switching mechanism 20. The motor 10 of this embodiment is a direct current (DC) brushless motor, but may also be a switched reluctance motor or the like.

[0032] Such as figure 2 As shown, encoders 131 and 132, which are motor rotation angle sensors, detect the rotation position of the r...

no. 2 example

[0086] The second embodiment example Figure 12 to 14 Shown. In this embodiment, the encoder abnormality diagnosis processing is different from the above-mentioned embodiment, and the differences are mainly described below. based on Picture 12 The flowchart of this embodiment describes the encoder abnormality diagnosis processing. The processing of S351 to S354 is similar to Figure 8 S301 to S304 in the process. When it is determined in S354 that the abnormal state is a temporary abnormality (S354: Yes), the process proceeds to S355.

[0087] In S355, the first control unit 51 determines whether the decisive abnormality determination standby time T4 has elapsed since the abnormal state became the temporary abnormality. The decisive abnormality determination standby time T4 is set, so that the decisive abnormality determination is performed after the gear shifting is completed. In addition, instead of determining the waiting time T4 based on a decisive abnormality, it is also...

no. 3 example

[0095] The third embodiment example Figure 15 to 19 Shown. In the first and second embodiments, the encoder abnormality has been described as an abnormality affecting the driving of another system. In this embodiment, the abnormality in which the switching elements 411 to 416 and 421 to 426 cannot be interrupted (hereinafter referred to as "element-on abnormality") is described as an abnormality that affects the driving of another system. The processing of this embodiment can be executed in parallel with the processing involving encoder abnormalities in the first embodiment or the second embodiment. The drive mode selection process and the energization control process are the same as the above-mentioned embodiment.

[0096] Figure 15 Starting from the top row, the energization command, component voltage, and phase current are shown respectively, with a common horizontal time axis, respectively for U-phase, V-phase and W-phase. Such as Figure 15 As shown, when the power-on c...

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Abstract

A shift range control device that switches a shift range by controlling driving of a motor (10) includes a plurality of control units (51, 52) and a plurality of motor drivers (41, 42). The pluralityof control units (51, 52) respectively have an energization control unit (513, 523)for controlling energization to the motor (10) and an abnormality monitor unit (516, 526) for performing abnormalitymonitoring. The energization control unit (513, 523) turns off energization of the own system in a state of temporary abnormality before determining a decisive abnormality when abnormality affecting the other system is detected in the own system while driving the motor by the plurality of systems, and the abnormality monitor unit determines whether a state of abnormality is the temporary abnormality or the decisive abnormality after turning off energization of the own system.

Description

Technical field [0001] The present invention generally relates to a gear shift control device. Background technique [0002] The prior art includes a gear shift control device, which switches gears by controlling the driving of a motor. For example, in Patent Document 1, when the drive of the motor is controlled by one of two microcomputers and an abnormality occurs in the microcomputer for motor drive control, the microcomputer is switched from one to the other, for example, from One microcomputer used for motor drive control is switched to another microcomputer to continue drive control. [0003] (Patent Document 1) JP 2018-40462 A [0004] By the way, when a motor is driven by multiple systems, if an abnormality occurs in a part of the multiple systems, for example, due to the interference of the abnormal system to the normal system, this situation may cause the motor to be locked or handled unexpectedly. Summary of the invention [0005] The object of the present invention is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/02F16H61/12F16H61/32
CPCF16H61/0204F16H61/12F16H61/32F16H2061/005F16H2061/1284F16H2061/1208F16H2061/326
Inventor 坂口浩二中山诚二山田纯宫野遥
Owner DENSO CORP
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