Tension Adjustment Device for Adaptive Engine Front End Accessory Wheel Train

Abstract

The invention discloses a tension adjusting device for a self-adaptive engine front end accessory gear train. The tension adjusting device comprises the engine front end accessory gear train and a belt tension control system. The belt tension control system comprises a piezoelectric sensor, an angle encoder, a comparator, a controller and an actuator. When the rotation speed of a crankshaft of an engine is zero, a tensioning wheel is in the preset position where the belt tension is smaller all the time; when the engine is started, the rotation speed of the crankshaft is gradually increased from zero, and the controller immediately controls the actuator to act, so that the tensioning wheel moves to the preset position where the belt tension is larger; and after the rotation speed of the crankshaft is stable, a tension value obtained by the piezoelectric sensor is compared with a preset tension value through the comparator, then the controller controls the actuator to act to adjust the position of the tensioning wheel so that the tension can be kept in a constant state. According to the tension adjusting device, the rotation speed of the crankshaft of the engine and the dynamic tension applied to the ribbed belt can be measured in real time, and the position of the tensioning wheel can be adjusted actively, so that the purpose that the tension of the belt is adjusted according to the running state of the self-adaptive engine is achieved.

Description

technical field [0001] The invention belongs to the field of automobile engineering, and in particular relates to a tension adjustment device for a belt transmission system, in particular to a tension adjustment device for a front-end attachment wheel train of an engine. Background technique [0002] Since the late 1970s, more and more engine manufacturers have used a single V-belt (also known as a belt) to simultaneously drive many front-ends including oil pumps, power steering pumps, air-conditioning compressors, water pumps, generators, etc. Accessory equipment. In order to ensure the reliable and high-efficiency operation of this transmission mode, the tension of the belt must be kept stable. However, after the belt has been working for a period of time, it will elongate due to aging and wear, which will reduce the tension of the belt, cause the belt to vibrate violently or even slip, which will seriously affect the performance of the belt to transmit motion. [0003] ...

AI Technical Summary

Problems solved by technology

This method is time-consuming and labor-intensive, requires high professionalism, and cannot guarantee that the tensioner can adapt to the change of the belt length and provide a suitable tension force with as little change as possible during the entire life cycle of the tensioner.

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