Papers by Keyword: Wheel Loader

Abstract: The article presents a digital model for selecting the optimal transport type for hauling dimension stone blocks in quarry operations. The model integrates fuel consumption, transportation cost, block geometry, and pollutant emissions, providing a combined techno-economic and environmental assessment of transportation scenarios. Developed in Google Colab with Python, it ensures flexibility and is linked to Google Sheets for real-time data input without additional software. Key parameters include transport type, road gradient, traction coefficients, equipment productivity, seasonality, fuel use, and emissions of CO₂, NOₓ, SO₂, and PM.The model was tested on production data from the Southern section of the Mezhyrichchia quarry using a CAT 980H wheel loader and a KrAZ-65055 dump truck. Results show that optimized transportation scenarios can cut fuel consumption by up to 31% and reduce costs per 1 m³ by 26%. At the same time, emissions per 1 m³ of commercial stone blocks can be lowered by up to 30% through appropriate equipment selection and reduced idle trips. The model can serve as a decision-support tool in real-time quarry operations, helping minimize fuel overuse and ecological risks. Adapted for small-scale enterprises, it can also be implemented as a mobile application.

Abstract: A method to establish duty cycle was proposed based on wheel loader operating characteristics and features. Firstly, wheel loader operating characteristics, energy consumption and power distribution rules were summarized theoretically. Wheel loader energy consumption rules were explored through operating test. The features were extracted from testing data which can represent wheel loader operating rules. Finally, the duty cycle was composed according to the rules features arose in the actual operating test. The duty cycle will provide support for data files for hybrid wheel loader power system matching, computer simulation and dynamic analysis. Furthermore, the duty cycle will be helpful for traditional wheel loader dynamic matching, simulation analysis and numerical optimization.

Abstract: The wheel loader will release a lot of energy in the process of reducing the speed and braking. In the paper it introduced the types and features of the loader hydraulic hybrid system, analyzed configuration, energy saving scheme and working state of the loader parallel hydraulic hybrid system. The results show that the parallel hydraulic hybrid system is applied to the loader, not only it can efficiently recovery braking energy, but also it can improve the dynamic performance of the loader, so the engine can work in the optimal fuel economy area, improve fuel economy.

Abstract: Steer-By-Wire system connects and controls components in steer system to replace the traditional mechanical or hydraulic connection. The connection between the steering wheel and steered wheel is no more than mechanical or hydraulic. Their kinematics relation is controlled by software, therefore the parameters such as the transmission ratio and road feel can be modified in wide range which has great advantages. This paper introduces the structure and principle of wheel loader Steer-By-Wire system, explains the main advantages and key technologies of Steer-By-Wire system.

Abstract: The characteristics of traditional load sensitive system and the control system of electric hydraulic flow matching are introduced comparatively. In order to improve the energy saving and the overall control performance of wheel loader, Electro-hydraulic flow matching control system is adopted. In the meantime, the machine-liquid walking institution in the traditional sense is changed into full hydraulic pressure drive institution by using the module modeling way, which omits the "double" system including the hydraulic torque converter and the transmission constitute, simplifies the chassis structure and improves the flexibility of the machine. Simulation model of the wheel loader of full hydraulic pressure drive is established by the software named AMEsim, which provides reference for the designs and applications of the matching control system of electric hydraulic flow applied to the full hydraulic pressure drive wheel loader.

Abstract: The field test results show that existing double-pump confluence hydraulic system with constant displacement pump of wheel loader could only save some energy while the load pressure is rather high (>15Mpa in the tests). However, the load pressure is usually low, especially when the wheel Loader is working on bulldozing operation or just steering and running. Thus, an optimized double-pump confluence hydraulic system was designed by adding a proportional valve and adjust operation rule, so that the output oil of steering pump flow into tank by the proportional valve while the load pressure is low and the relative position of joystick is not large (<72%), and in this way the throttle losses is reduced. Simulation results indicate that the optimized confluence hydraulic system could save 26.2% throttle losses while the wheel Loader is working on bulldozing operation.

Abstract: The tested wheel loader machinery noise was 110dB and driver position was 108dB, more than Chinese earth-moving machinery standard. Engine noise is the main noise, so thirty-five test points were arranged around the cab and engine to analyze and find the main noise points. The frequency spectrogram show that the main frequency band for the engine and exterior cab are 120Hz and 216Hz, and the interior cab noise was caused by the vibration of the power train passed through the frame result in resonance. Analyzed and calculated the main frequency concludes that the main noise resources are engine exhaust noise and cooling fan noise. To decrease the noise, proper damping materials were affixed to the engine hood and interior cab, the metal pieces were tightened and the cooling fan and shock absorber were replaced with new ones that match the main noise frequency.

Abstract: The development and characteristics of Steer-By-Wire is introduced and the design of Steer-By-Wire in articulated wheel loader is fully discussed in this paper. The whole system takes advantage of proportional decompression valve to control the motion of preferential flow amplifier valve, and further to achieve steering by controlling steering cylinder. Whats more, this paper has also elaborated on a design of new-type steering angle detection devices of vehicle frame, which aims at more accurate corner detection and is also a breakthrough in steering system of wheel loader.

Abstract: Based on the rigid-flexible coupling virtual prototyping technology, the entities model of wheel loaders structural system was established by using Pro/E, then it was imported into the ADAMS environment and constraints were added to create a rigid model, and the corresponding rigid body was replaced by the model neutral file generated by ANSYS, thereby the rigid-flexible coupling virtual prototype was established. The speed and acceleration curve of bucket in a work cycle, the dynamic stress of link and the rear frame was achieved, and the dynamic characteristics of the bucket was analyzed. This paper can provide a reference for similar models of rigid-flexible coupling dynamics simulation.

Abstract: Based on the CAE analysis. The dual variable gear shaft of the transmission for domestic ZL50 wheel loader was redesigned and the processing technology was optimized. The problem of the hardness of the spline which connects the dual variable gear shaft and the working hydraulic pump can not meet the requirements after heat treatment caused by unreasonable design was solved. The problem of the low geometric tolerance and early wear of the spline were solved. After practical application, the market feedback shows that the failure rate, service life and reliability greatly of new designed shaft were enhanced