A method for optimizing the semi-clutch tip-out working condition of a manual transmission vehicle

A half-clutch, gear-shifting technology, applied to components with teeth, transmission control, belts/chains/gears, etc., can solve problems such as speed drop, reduce impact, optimize driving conditions, and optimize results. Effect

Active Publication Date: 2021-11-23
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] If the method of torque filtering is used for control, that is, to let the torque drop as slowly as possible to achieve smooth synchronization, but it will bring other drivability problems, such as the problem that the speed drops very slowly after the accelerator is released.

Method used

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  • A method for optimizing the semi-clutch tip-out working condition of a manual transmission vehicle
  • A method for optimizing the semi-clutch tip-out working condition of a manual transmission vehicle
  • A method for optimizing the semi-clutch tip-out working condition of a manual transmission vehicle

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] The optimization method provided in this embodiment is a control method aimed at reducing the shock during the synchronization process of the flywheels at both ends of the clutch under the half-clutch tip-out working condition, thereby optimizing the drivability.

[0039] In this embodiment, first of all, it is necessary to confirm whether the vehicle has entered the semi-clutch tip-out working condition. The confirmation method is: estimate the speed of the output end of the clutch flywheel, that is, the speed of the gearbox input shaft ngearbox-input ,Calculated as follows:

[0040]

[0041] where: n gearbox-input - the speed of the gearbox input shaft;

[0042] no flywheel-out ——rotational speed of output end of clutch flywheel;

[0043] V—vehicle speed;

[0044] Ratio - the total transmission ratio of the transmissio...

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Abstract

The invention relates to the technical field of automobile control, in particular to a method for optimizing the half-clutch tip-out working condition of a manual transmission vehicle. Identify whether the vehicle has entered the half-clutch tip-out condition, and when the vehicle enters the half-clutch tip-out condition, control the engine speed from the maximum n c Fast decay to set speed n thrshn , and then control the engine speed from the set speed n thrshn Smooth decay to synchronous speed n e ; The synchronous speed n e The speed of the engine when the flywheels at both ends of the clutch are smoothly synchronized. Compared with the existing way of controlling the impact simply through torque filtering, the present invention can realize the smooth synchronization of the clutch when the engine speed is close to the speed of the input shaft of the gearbox, and reduce the impact, and the control method is simple. The optimization effect is good and has great promotion value.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a method for optimizing the half-clutch tip-out working condition of a manual transmission vehicle. Background technique [0002] In manual transmission models, the power of the engine is output to the wheels through the clutch and gearbox to drive the vehicle. When the clutch is fully engaged, the clutch can be regarded as a rigid connection, and the rotation speeds of the engine crankshaft and the gearbox input shaft are kept consistent at all times. [0003] The process of synchronizing the two end faces of the clutch is called the half-clutch working condition. After starting or shifting gears, drivers often perform acceleration and deceleration operations under half-clutch. In the half-clutch working condition, the flywheel at the input end of the clutch and the flywheel at the output end of the clutch rotate in the same direction, but at the same time, there is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/04F16H61/02
CPCF16H61/0204F16H61/04
Inventor 陈永全刘仁龙陈孔武喻骏
Owner DONGFENG MOTOR CORP HUBEI
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