BSG system and vehicle

Abstract

The invention provides a BSG system and a vehicle. The BSG system comprises a BSG wheel train, a sensing device, a drive device and a controller. The BSG wheel train comprises a BSG motor, a first adjusting wheel, an idle wheel, a water pump, a crankshaft damping belt pulley, an air conditioner and a second adjusting wheel, wherein the BSG motor, the first adjusting wheel, the idle wheel, the water pump, the crankshaft damping belt pulley, the air conditioner and the second adjusting wheel are sequentially in transmission through a belt. The sensing device is used for obtaining the rotation speeds of the first adjusting wheel and the second adjusting wheel and the heavy load pressures of the first adjusting wheel and the second adjusting wheel. The drive device is used for adjusting the positions of the first adjusting wheel and the second adjusting wheel in the BSG wheel train according to drive signals sent by the controller. The controller is used for generating the drive signals according to the rotation speeds of the first adjusting wheel and the second adjusting wheel, the heavy load pressures of the first adjusting wheel and the second adjusting wheel and a selected workingcondition mode. The BSG system can improve the work reliability of the wheel train, comprehensively diagnose the fault of a belt system and adjust the belt system to eliminate the fault.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a belt drive starter and generator (Belt Driven Starter and Generator, BSG) system and a vehicle. Background technique [0002] The micro-hybrid system with BSG has been widely used in mainstream automobiles. The BSG hybrid system is a modification of the generator of a traditional engine. Since the starter / generator must be driven by a belt, there are many problems to overcome when the engine starts. Large resistance torque, so the belt drive system of this device has high requirements on the tensioning device. [0003] In the related art, the engine accessory belt transmission system has the following problems: [0004] 1. The engine tensioning belt drive of a traditional car is composed of a single spring arm, but the tensioning of the single arm will cause excessive slack and over-tightening of the belt in the BSG system; [0005] 2. The traditional BSG accessory belt t...

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Problems solved by technology

[0004] 1. The engine tensioning belt drive of a traditional car is composed of a single spring arm, but the tensioning of the single arm will cause excessive slack and over-tightening of the belt in the BSG system;

[0005] 2. The traditional BSG accessory belt transmission system uses an automatic tensioner to maintain the tension of the belt, and an idler wheel is used at the position of the tensioner to ensure sufficient wrap angle, and a large force is applied to the tensioner. This will greatly reduce the service life of the tensioner and the belt; installing the tensioner on the loose side of the belt will also leave hidden dangers for excessive vibration and noise of the accessory gear train and belt deviation;

[0006] 3. The traditional BSG accessory belt transmission cannot adjust the tension force in real time according to the 4 working modes of the BSG motor, resulting in too small tension force causing slippage between the belt and the pulley, low transmission efficiency, and increasing the lateral direction of the belt Vibration greatly increases the vibration and noise level of the entire accessory system; if the tension is too large, the belt is stretched too tightly, which reduces the service life of the belt, increases the radial load of the bearing, aggravates the wear of the bearing, and reduces the service life;

[0007] 4. For the hydraulic tensioner with automatic locking function, it is difficult to match the gear train system, the manufacturing cost is high, and the problems of low reliability (leakage) have become the disadvantages of this type of tensioner

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