Method for preventing impact generated when hydraulic torque converter is switched from open state to locked state
A technology of torque converter and torque converter is applied in the field of preventing the impact of the torque converter from opening to locking, which can solve the problems of gearbox failure, increased gearbox risk, and increased gearbox cost.
Active Publication Date: 2017-10-17
SHENGRUI TRANSMISSION
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Problems solved by technology
[0007] (1) The parts of the hydraulic torque converter increase, and the risk of gearbox failure increases. The failure of the belleville spring will lead to the scrapping of the hydraulic torque converter, and even the failure of the entire gearbox through lubricating oil;
[0008] (2) The cost of the gearbox increases
Method used
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Embodiment Construction
[0021] Such as figure 1 As shown, a method to prevent torque converter from opening to lock-up shock, automatic transmission in coasting condition, torque converter increases engine torque before lock-up, torque converter lock-up clutch response The block command oil pressure starts to build up the oil pressure, and the engine speed increases with the increase of the engine torque. Cooperating with the block command oil pressure of the hydraulic torque converter, the engine speed increases under the action of the increased engine torque. When the absolute value of the difference between the rotational speeds of the input shafts of the tank is less than N, the lockup clutch completes the lockup of the torque converter, and the torque converter enters into a locked state. N is a scalable value.
[0022] preferred, such as figure 1 As shown, torque is increased in the engine at time T1 while the lockup clutch begins to build oil pressure in response to the lockup command oil ...
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The invention discloses a method for preventing impact generated when a hydraulic torque converter is switched from an open state to a locked state. The torque of an engine is increased before the hydraulic torque converter is locked under the sliding working condition of an automobile gearbox, a lockup clutch of the hydraulic torque converter responds to a locking command oil pressure to start to establish an oil pressure, the rotation speed of the engine is increased along with increase of the torque of the engine and is matched with the locking command oil pressure of the hydraulic torque converter so that the rotation speed of the engine can be increased by increasing the torque of the engine, when the absolute value of the difference between the rotation speed of the engine and the rotation speed of an input shaft of the gearbox is smaller than N, the lockup clutch completes locking of the hydraulic torque converter, and the hydraulic torque converter enters the locked state. The rotation speed of the engine is stably increased through the torque increase of the engine, and control over the locking command oil pressure of the hydraulic torque converter is also used, so that the impact generated when the hydraulic torque converter is switched from the open state to the locked state is eliminated.
Description
technical field [0001] The invention relates to a method for preventing shock from being opened to locked in a hydraulic torque converter. Background technique [0002] In order to save fuel, the automatic transmission with a torque converter needs to reverse the engine in order to save fuel, so as to prevent the engine speed from falling and triggering oil cut recovery. [0003] If the torque converter is on during coasting, the engine speed will gradually transition to near the target idle speed, which will cause the engine to reach the fuel cut-off speed or trigger the fuel cut-off recovery speed without fuel cut-off. At this time, the hydraulic torque converter needs to react to the engine through locking, and the engine rotates in reverse, so that the engine speed is always kept above the oil cut recovery speed, so as to ensure the maximum oil cut interval. [0004] In the coasting condition of loose throttle, in the process of the torque converter from opening to lock...
Claims
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IPC IPC(8): F16H41/04F16H41/24
CPCF16H41/04F16H41/24
Inventor 许永信戴振坤刘强曹永郭太民侯可明
Owner SHENGRUI TRANSMISSION