Accessory gear train of BSG hybrid power engine

Abstract

An accessory gear train of a BSG hybrid power engine comprises a V-ribbed belt, a BSG motor, a two-way tensioner, a first idle wheel, a water pump, an air conditioner compressor, a crankshaft and a second idle wheel, the two-way tensioner is arranged on the BSG motor, a motor belt wheel is arranged on the BSG motor, and a water pump belt wheel is arranged on the water pump; an air conditioner compressor belt wheel is arranged on the air conditioner compressor, a crankshaft belt wheel is arranged on the crankshaft, and the V-ribbed belt sequentially bypasses the motor belt wheel, the first idlewheel, the water pump belt wheel, the air conditioner compressor belt wheel, the crankshaft belt wheel and the second idle wheel to form a closed-loop belt; and the first idle wheel is arranged at the inner side of the V-ribbed belt. According to the accessory gear train, by increasing the wrap angle of tensioning wheels, the problem that because the compensation capacity of the tensioning wheelsfor the length change of the belt is not high, the initial design tension of the belt is too high is solved, and meanwhile the problem that abnormal sounds are generated during starting of the belt wheel due to insufficient wrap angle of the two-way tensioner is solved.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to an accessory wheel train of a BSG hybrid electric engine. Background technique [0002] The 48V P0 system is a type of BSG (Belt Driven Starter Generator) system. Due to its excellent energy-saving effect, it has become a major research direction for major car companies to save fuel and reduce emissions in the next few years. However, many existing engines did not consider the layout of the BSG wheel train in the early design and development of the wheel train, and the operating conditions of the BSG wheel train are worse than the traditional ones, and the space requirements for the front end are also greater. In the case of changing the original parts of the engine, there is less space for the arrangement of the wheel train. [0003] The existing 48V BSG gear train is divided into single-layer gear train design and double-layer gear train design. The single-lay...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the layout space of the existing single-layer BSG wheel train, the control of the wrap angle of the two-way tensioner is generally small, and the wrap angle of the tensioner wheel is generally around 60°-70°. The capacity is not high, resulting in high initial design tension of the belt, which is not good for the life of the gear train bearings and belt, and is also not conducive to reducing the friction work of the gear train.

At the same time, under extreme working conditions of BSG such as low temperature environment and 48V battery power shortage, when the engine needs a 12V starter to start, the two-way tensioner may hit the limit stop due to the small wrap angle and produce abnormal noise

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