A power transmission system of a hybrid forklift and its control method

Abstract

The invention discloses a power transmission system of a hybrid forklift and a control method thereof, including an engine assembly, a transmission system, a walking system, an operation system, a vehicle controller and a control system; the engine assembly includes a fuel engine assembly , an ISG motor assembly and a battery assembly, the ISG motor assembly drives the fuel engine assembly to start, and simultaneously drives the walking system and the operating system through the transmission system; the fuel engine assembly drives the ISG motor assembly to generate electricity and supplies power to the battery Assembly charging; the control system controls the clutches and brakes through the vehicle controller to switch between control modes. Beneficial effects: the present invention can make the fuel engine work in a high-efficiency area, and the ISG motor assembly assists the fuel engine to work under severe working conditions, thereby controlling the emission and fuel consumption of the fuel engine. When the fuel engine has surplus power, the ISG motor assembly acts as The generator charges the battery assembly.

Description

technical field [0001] The invention relates to a power transmission system of an engineering vehicle and a control method thereof, in particular to a power transmission system of a hybrid forklift and a control method thereof, and belongs to the technical field of engineering machinery. Background technique [0002] Construction vehicles are widely used in construction engineering, mechanical production, logistics and transportation, etc. According to the power source, electric and fuel oil are divided. Electric type construction machinery is superior to fuel oil in terms of manufacturing, use costs, environmental protection, and maintenance costs during use. engineering vehicle. At present, the electrification of engineering vehicles has become a new development trend, and it has a rapid development momentum recently. [0003] With the rapid development of the logistics industry in recent years, the forklift industry for fixed on-site operations and short-distance transpo...

AI Technical Summary

Problems solved by technology

[0004] The common working conditions of forklifts are long-term operation in low-to-medium load conditions, frequent short-term heavy loads or even overload conditions, so the working conditions of traditional fuel forklifts are very bad, and they cannot work in the high-efficiency area of ​​the engine for a long time, resulting in forklift pollutants Poor emissions and high fuel consumption

Pure electric forklifts are limited by energy storage devices, and have extremely poor adaptability in alpine regions. At the same time, high-efficiency energy storage devices are expensive, charge for a long time, and have poor continuous high-intensity work capabilities.

Hybrid forklifts not only have the advantages of strong working ability, high reliability and good adaptability of traditional forklifts, but also can maintain low emission pollution and reduce fuel consumption appropriately; however, the power distribution and energy management of the power system of hybrid forklifts have always been is the difficulty restricting its development

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