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Deterioration Determination Device for Automatic Transmission Oil

A technology for automatic transmission oil and automatic transmission, which is applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as complex structure, and achieve the effect of good precision and cost reduction.

Active Publication Date: 2018-12-18
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In this way, in the technology described in Patent Document 1, since the determination of automatic Deterioration of the transmission oil, so the structure becomes complicated

Method used

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  • Deterioration Determination Device for Automatic Transmission Oil
  • Deterioration Determination Device for Automatic Transmission Oil
  • Deterioration Determination Device for Automatic Transmission Oil

Examples

Experimental program
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Embodiment approach

[0032] figure 1 It is a schematic diagram generally showing an automatic transmission oil deterioration determination device according to an embodiment of the present invention.

[0033] exist figure 1 Reference numeral 10 denotes an automatic transmission (hereinafter, simply referred to as "transmission"). The transmission 10 is mounted on a vehicle (not shown), and a drive source, more specifically, an internal combustion engine (hereinafter referred to as an "engine" figure 1 (not shown) output is transmitted to the left and right drive wheels (not shown) after being shifted.

[0034] As shown in the figure, the transmission 10 includes an input shaft (rotation shaft) 12, a DR (driving) pulley shaft (rotation shaft) 14, a DN (driven) pulley shaft (rotation shaft) 16, and an idler shaft 18 arranged in parallel to each other. An output of the engine is input from an input shaft 12 via a torque converter 20 having a lock-up clutch 20a.

[0035] A continuously variable tra...

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Abstract

The present invention provides a device for determining deterioration of automatic transmission oil having a simple structure and accurately determining the deterioration of automatic transmission oil used for operation and lubrication of an automatic transmission rotatably supported on a device. inside the transmission case. In the degradation determination device of automatic transmission fluid (ATF) used for the operation and lubrication of the automatic transmission rotatably supported in the transmission case, the oil temperature of the automatic transmission oil is detected (S12), and the detected temperature is calculated. The rate of rise of the oil temperature (S12), based on the running state of the vehicle, calculates the estimated threshold for the decrease in the antifoaming performance of the automatic transmission oil (S14), and when it is determined that the prescribed condition is satisfied (S10), the calculated The oil temperature increase rate is compared with the threshold value, and when the calculated oil temperature increase rate exceeds the threshold value, it is determined that the automatic transmission oil has deteriorated, and the user is prompted to replace it (S16, S18).

Description

technical field [0001] The present invention relates to a degradation judging device for automatic transmission oil. Background technique [0002] As a technique for determining deterioration of automatic transmission fluid (Automatic Transmission Fluid, transmission fluid), for example, the technique described in Patent Document 1 is known. [0003] In the technology described in Patent Document 1, it is configured to monitor the According to the method of use of the vehicle, the severity of the use state of the automatic transmission oil of the transmission mounted on the vehicle is determined based on the estimated value of oil deterioration calculated based on the obtained plurality of deterioration factors, and the level of the automatic transmission oil is determined according to the degree. Change the timing and notify. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2011-214932 [0005] In this way, in the technology described in Patent Document 1, since...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H57/04G01N33/30F16H61/12
CPCF16H57/0405G01N33/30G01N33/2888G01N25/20
Inventor 山下徹
Owner HONDA MOTOR CO LTD