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Classifying high-temperature protection method for speed changer

A technology for high temperature protection and transmission, applied in transmission parts, elements with teeth, belts/chains/gears, etc., can solve the problems of limiting transmission, single means of high temperature protection of transmission, unable to maximize the function of transmission, etc. To achieve the effect of preventing safety accidents

Active Publication Date: 2014-04-02
ZHEJIANG GEELY HOLDING (GROUP) CO LTD +1
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AI Technical Summary

Problems solved by technology

[0003] In the prior art, the high temperature protection means for the transmission is relatively simple
Usually, the performance of the transmission is completely limited after the transmission fluid reaches a certain temperature, so that it is impossible to take different measures when the transmission is at different temperatures according to the characteristics of the transmission itself, so the function of the transmission cannot be maximized

Method used

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  • Classifying high-temperature protection method for speed changer
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  • Classifying high-temperature protection method for speed changer

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Embodiment Construction

[0070] figure 1 It is a flow chart of a transmission hierarchical high temperature protection method according to an embodiment of the present invention. It should be understood that the transmission here and below is an automatic transmission with M forward gears for motor vehicles, and when its output shaft drives the vehicle forward, the transmission works in one of the M forward gears. block, wherein M is an integer greater than or equal to 2, and m is an integer equal to 1, 2, ..., M.

[0071] The step-by-step high temperature protection method of the transmission of the present invention may generally include step 101 and step 102 . Step 101 is: detecting the oil temperature of the transmission to obtain an oil temperature signal, and sending the oil temperature signal to a control unit of the transmission. Step 102 is: according to the oil temperature signal, the control unit controls the transmission to be in the basic operation mode or an n-th protection level among...

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Abstract

The invention provides a classifying high-temperature protection method for a speed changer. The method comprises the steps of A, detecting the temperature of oil liquid of the speed changer to obtain an oil temperature signal and sending the oil temperature signal to a speed changer control unit; step B, controlling the speed changer to be at the basic operation mode or the nth protection class in N protection classes according to the oil temperature signal. Under the basic operation mode and each protection class, the speed changer is configured to respectively adopt the corresponding basic gear shifting mode, the partial protection gear shifting mode which is subjected to gear shifting earlier or later relative to the basic gear shifting mode and a full protection gear shifting mode or a disenabling mode. Furthermore, under each protection class, an engine, a torque converter of the speed changer and a fan are also specially controlled. Due to such design, different protection measures can be adopted by setting different protection classes according to different oil temperatures, so the oil temperature of the speed changer can be controlled under the premise of furthest ensuring vehicle performances, and safety accidents are prevented.

Description

technical field [0001] The invention relates to a stepwise high temperature protection method of a transmission. Background technique [0002] The oil in the transmission will become thinner as its temperature rises, which will affect the cooling effect, and when the temperature of the oil in the transmission is too high, the normal oil pressure cannot be guaranteed, which will affect the performance of the transmission and the whole vehicle, seriously Fortunately, it will cause damage to parts. Therefore, when the transmission oil temperature is too high, corresponding protective measures are required to slow down or even prevent the temperature from rising. [0003] In the prior art, the high temperature protection means for the transmission is relatively simple. Usually, the performance of the transmission is completely limited after the transmission fluid reaches a certain temperature. In this way, different measures cannot be taken when the transmission is at differen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H57/04F16H63/40F16H59/08
CPCB60W10/06B60W10/10F16H57/0413F16H59/72F16H2059/0221
Inventor 何麒瑜金吉刚杨安志吴成明冯擎峰
Owner ZHEJIANG GEELY HOLDING (GROUP) CO LTD
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