A steady-state control method for the power domain of in-wheel hydraulic hybrid vehicles

Abstract

The invention provides a steady-state control method for the power domain of the hub hydraulic hybrid vehicle, which is the basis for ensuring the reasonable control of the vehicle power domain in the long-term steady-state working condition. It is divided into two parts. One is to establish a reasonable mode arbitration Rules, determine the driving mode of the vehicle, solve the required power according to the driver's intention, and then control the traditional engine and hydraulic drive system to ensure that the vehicle's synthetic torque reasonably follows the driver's intention, and recharge the accumulator through braking energy recovery The second is to solve the power shift rule and economic shift rule in different modes, and then plan the target gear when the vehicle is driving according to the vehicle speed and pedal opening. In summary, the wheel hub hydraulic pressure can be obtained The overall control variables of hybrid electric vehicles are engine torque, hydraulic pump displacement, accumulator drain valve opening and AMT target gear. key to sex.

Description

technical field [0001] The invention relates to the field of hybrid vehicle control, in particular to a steady-state control method oriented to the power domain of hub hydraulic hybrid vehicles. Background technique [0002] Commercial vehicles often encounter low-adhesion road conditions such as mountainous roads, soft country roads, and icy and snowy roads during their work. Although traditional all-wheel drive vehicles improve the passability on low-adhesion roads, the parasitic power deteriorates the vehicle economy. , while the in-wheel hydraulic hybrid power system can realize timely all-wheel drive, which can not only significantly improve the vehicle's low-adhesion road passability; Hydraulic auxiliary braking can improve braking safety. In addition, compared with the hybrid system, it has the advantages of high power density, small mass and volume, and low overall cost. For the in-wheel hydraulic hybrid vehicle, due to its complex structure, the front wheel hydraul...

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Problems solved by technology

[0004] In order to solve the shortcomings of the existing technology, the present invention designs a steady-state control method for the power domain of the hub hydraulic hybrid vehicle based on the hub hydraulic hybrid vehicle, which can realize multi-objective and efficient control of each sub-controller in the vehicle power domain. Integration can break through the control boundary of each sub-executive component, and improve the shortcomings of traditional distributed control communication, such as low communication efficiency, poor data transmission accuracy, and redundant wiring harness and controller functions. At the same time, the centralized power domain control architecture is also a comprehensive multi-dimensional performance Control optimization provides an advantageous platform foundation, which can give full play to the redundant drive characteristics of in-wheel hydraulic hybrid power, realize stable control in the power domain, improve the overall quality of hybrid power vehicles, and meet users' needs for smooth shifting, driving economy and vehicle dynamics. Taking into account the needs

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