Hybrid power loader energy recovery and recycling system and control strategy thereof

Abstract

The invention provides a hybrid power loader energy recovery and recycling system and a control strategy thereof. According to the system, the output end of an engine is connected with a steering oilpump and a working oil pump through a normally engaged gear, and is also connected with a first clutch and a transfer case through the normally engaged gear; the transfer case is connected with a front transmission shaft and a front drive axle through the first output end of a torque coupler, and is connected with a second clutch and a variable hydraulic pump / motor through the second output end ofthe torque coupler; one end of the variable hydraulic pump / motor is connected with a low-pressure oil tank, and the other end of the variable hydraulic pump / motor is sequentially connected with an energy control valve group and a high-pressure energy accumulator; and one ends of the steering oil pump and the working oil pump are connected with the low-pressure oil tank, and the other ends of thesteering oil pump and the working oil pump are connected with the energy control valve group. According to the system, the recovery of the potential energy of a movable arm and the braking energy canbe realized through an energy control valve group system, and the steering oil pump and the working oil pump actively charges the energy when a loader runs at a low load and the engine works at an idle speed. The system and the control strategy thereof have the advantages of high energy recovery and utilization rate, high system efficiency and sensitive response of the energy control valve group.

Description

Technical field [0001] The invention relates to the field of hydraulic hybrid power, in particular to an energy recovery and reuse system of a hybrid power loader and its control strategy. Background technique [0002] Loaders are the main mechanical equipment for modern engineering construction and military engineering construction, and occupy an important position in the national economy and modernization construction. Its working environment is relatively harsh, the load changes greatly, and the engine power cannot be fully utilized. In this way, its fuel utilization rate and comprehensive work performance are improved, making it more efficient, energy-saving, durable and comfortable at work. important. [0003] Due to its excellent automatic adaptability, passability, service life and operating comfort, hydraulic mechanical loaders occupy an absolute dominant position in the current loader market. However, the hydraulic transmission system of the hydraulic mechanical loader h...

AI Technical Summary

Problems solved by technology

However, the hydraulic transmission system of the hydraulic mechanical loader has low efficiency, poor economy, complicated structure and high manufacturing cost.

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