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Shift range control device

A control device and gear technology, which is applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as reducing the accuracy of judgment, incorrect gear switching, and wrong judgment of gears, etc.

Active Publication Date: 2020-10-27
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the valley position knowledge is unreliable, incorrect gear switching and reduced rotational positioning accuracy of the rotating member occur at the time of gear switching, and also cause erroneous determination of the gear and lowered determination of the gear when determining the gear Accuracy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0032] The gear control device according to the first embodiment is applied to a shift-by-wire system of a vehicle. Such as figure 1 As shown, the shift-by-wire system 10 is a system that electrically controls the gear shifting mechanism 12 of an automatic transmission 11 .

[0033]

[0034] refer to figure 2 The range switching mechanism 12 is described. The range switching mechanism 12 includes a detent plate 16 and a detent spring 17 . The stop plate 16 changes the valve position of the gear switching valve 14 of the transmission hydraulic circuit depending on its rotational position. The range is switched according to the valve position of the range switching valve 14 . A plurality of recesses 21 to 24 corresponding to the respective gear positions are formed on the outer edge of the stopper plate 16 .

[0035] The stopper spring 17 is pressed to the stopper plate 16 by the pressing force of the stopper spring 17 . The locking portion 25 of the stopper spring 17 l...

no. 2 example

[0117] In the second embodiment, as Figure 11 As shown, the valley position learner 72 of the ECU 71 knows the partial valley positions of all the recesses 21 to 24 . The aforementioned “portion” means, for example, the recessed portion 21 and the recessed portion 23 . The valley position acquirer 72 acquires a specific pair of valley positions, that is, the P valley position and the N valley position.

[0118] The validity determiner 73 determines the validity of both the P valley position and the N valley position which are partial valley positions. More specifically, when the difference between the P valley position and the N valley position learned by the valley position acquirer 72 is within a predetermined normal range from ΔθPNL to ΔθPNH, the validity determiner 73 affirmatively determines the validity and validity of the P valley position. The validity of the N valley position, where the predetermined normal range of ΔθPNL to ΔθPNH is the design value of the rotatio...

no. 3 example

[0130] In the third embodiment, such as Figure 13 As shown, the valley position learner 82 of the ECU 81 knows the partial valley positions in all the recesses 21 to 24 . The “portion” mentioned above means, for example, the recessed portion 22 . The specific valley position learned by the valley position learner 82 is the R valley position.

[0131] The ECU 81 includes a peak point position learner 84 . The peak point position knower 84 knows, as the peak point position, the output shaft rotation angle θo when the locking portion 25 is positioned at the peak point between the two concave portions based on the detection value of the angle detector 61 . More specifically, when the output shaft rotation number No becomes equal to or greater than a predetermined value N2 during shift switching (see Figure 14 ), the peak point position acquirer 84 determines that the locking portion 25 has relatively moved to the peak point between the two recesses, and obtains the output sha...

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PUM

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Abstract

A shift range control device includes an angle detector (61), a valley position learner (62), and a validity determiner (63). The angle detector (61) detects a rotation angle of an output shaft (43) of a shift actuator (31). The valley position learner (62) learns the rotation angle of the output shaft (43) when a locker (25) is positioned at a valley bottom of a recess (21-24) as a valley position based on a detection angle of the angle detector. The validity determiner (63) determines validity of a learning value of the valley position learner (62).

Description

technical field [0001] The present disclosure generally relates to range control devices. Background technique [0002] A range switching mechanism of an automatic transmission has a rotating member and a locking member. When the rotary member rotates, the valve position of the range switching valve of the hydraulic circuit moves. The gear is switched according to the valve position of the gear switching valve. A plurality of recesses corresponding to each shift ranges are formed on the outer edge of the rotary member. The locking portion of the locking member locks the rotation of the rotating member by locking in one of the plurality of recesses at a certain rotational position. [0003] A shift actuator is coupled to the rotary member so as to be able to transmit rotation. The shift actuator is controlled by a gear control device. The gear control device grasps a current gear based on an output signal of a rotation angle sensor provided on an output shaft of a shift ...

Claims

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Application Information

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IPC IPC(8): F16H61/12F16H61/32
CPCF16H61/12F16H61/32F16H2061/326F16H2061/0087F16H63/3408F16H63/3433F16H2061/126F16H63/3466
Inventor 坂口浩二中山诚二山田纯宫野遥
Owner DENSO CORP
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