CN-122016341-A - Method for facilitating calibration performance of range extender system

CN122016341ACN 122016341 ACN122016341 ACN 122016341ACN-122016341-A

Abstract

The invention relates to the technical field of range extenders for vehicles, discloses a method for facilitating the calibration performance of a range extender system, and aims to solve the problems of low calibration efficiency and insufficient conversion efficiency of fuel and electric energy of the existing range extender system. The method comprises the steps of butting a high-voltage loop of a range-extending system with an energy feedback type power cabinet to achieve real-time monitoring of calibrated electric energy recovery and power generation parameters, introducing a high-precision combustion analyzer to optimize the combustion state and working condition stability of an engine cylinder, adopting a two-dimensional meshing management strategy of throttle opening and rotating speed, dividing continuous sampling points in a full range to cover the full working condition, regulating the rotating speed and the throttle opening to complete calibration of all working condition points, recording core data, drawing a performance MAP graph, screening an optimal working curve, solidifying to a Generator Controller (GCU), and regulating and controlling by the GCU and an electronic injection controller in a combined mode. The invention obviously improves the fuel economy and the electric energy conversion efficiency of the range extender, shortens the calibration period and ensures the running stability and the robustness of the system.

Inventors

LI FEI
WU GENSHU
SUN ZHENHUI
XU ZIHAN

Assignees

重庆宗申发动机制造有限公司

Dates

Publication Date: 20260512
Application Date: 20260228

Claims (9)

1. A method for facilitating calibration of range extender system, comprising the steps of: S1, electrically connecting a high-voltage loop of a range extender system with a high-voltage loop of a power cabinet, and directly feeding back electric energy generated in the whole performance and economical calibration process of the range extender to the power cabinet; S2, a combustion analyzer is integrated into an engine detection loop, and the standard quantity of the range-extending system is adjusted according to the monitoring parameters of the combustion analyzer until the performance, the oil consumption and the engine stability of each working point of the engine are adjusted to the optimal state; S3, the GCU realizes the regulation and control of the running state of the range-extending system through an upper computer, and an electronic injection controller is responsible for controlling the electronic injection system; S4, the GCU adjusts the running rotating speed of the range-extending system through the upper computer, and the electronic injection controller synchronously adjusts the opening of the throttle valve through the upper computer so as to perform calibration and optimization work on all working condition points; S5, selecting an optimal working curve of the range-extending system by analyzing a performance MAP graph of the range-extending system, and adapting the selected working curve into the GCU, wherein the range-extending system can be operated in the working curve through joint regulation and control of the GCU and the electronic injection controller, so that the working efficiency of the range-extending system is optimized; s6, retesting and verifying the selected working curve through the CAN tool, and verifying whether the data meet the design requirements.
2. The method for facilitating the calibration of a range extender system according to claim 1, wherein in the step S1, the range extender system adopts a bench integrated installation and integral calibration strategy, and the system introduces an energy feedback type power cabinet.
3. The method for facilitating the calibration of the range extender system according to claim 2, wherein in the step S2, the range extender system introduces a high-precision combustion analyzer to monitor and diagnose the combustion process in the engine cylinder in real time.
4. The method for facilitating calibration performance of a range extender system according to claim 3, wherein in the step S3, the range extender system calibration data adopts a two-dimensional gridding management strategy based on throttle opening and engine speed.
5. The method for facilitating the calibration performance of the range extender system according to claim 4, wherein in the step S4, the range extender system performs full-condition calibration and iterative optimization on the system economy based on the multidimensional mapping relation between the throttle opening and the engine speed, and a high-efficiency operation database is constructed by screening and recording the operating point with the optimal fuel economy and is solidified into the generator controller.
6. The method for facilitating calibration of a range extender system according to claim 5, wherein in the step S4, the recorded weight data such as the weight data of the range extender system including temperature, oil consumption and power generation is analyzed to determine whether an abnormal phenomenon and data exist.
7. The method for facilitating the calibration of a range extender system according to claim 6, wherein in the step S5, after the complete calibration of the range extender system is completed, the selection of the optimal working curve is strictly limited to the most efficient operation interval of the system, and meanwhile, the boundary of the selected curve is precisely defined and checked.
8. The method for facilitating the calibration performance of the range extender system according to claim 7, wherein S6, the instruction interaction between the GCU and the electronic injection controller is simulated by using a CAN tool, the optimal working point of the range extender system CAN be subjected to closed loop verification, the oil consumption performance and the power generation performance are quantitatively evaluated, whether the working point selected by the GCU meets the calibration and design requirements or not is verified, and if the working point does not meet the calibration and design requirements, the S3-S6 is repeated.
9. The method for facilitating calibration of the range extender system according to claim 8, wherein in the step S6, the CAN tool is utilized to simulate the whole vehicle operation command, the combined control closed loop of the GCU and the electronic injection controller is constructed, and the power performance, the fuel economy and the like of the range extender system are comprehensively tested by recovering the operation condition of the whole vehicle.

Description

Method for facilitating calibration performance of range extender system Technical Field The invention relates to the technical field of range extenders for vehicles, in particular to a method for facilitating calibration performance of a range extender system. Background The range extender is used as a core energy supplementing unit of the range-extending electric automobile, the core working mechanism is that the engine drives the generator to generate electricity, electric energy is directly supplied to the driving motor or charges the power battery, and the engine does not directly participate in driving of the automobile, so that the service life anxiety, the long-distance travel charging difficulty, the battery capacity attenuation and other industry pain points of the pure electric automobile are effectively relieved while the pure electric automobile is kept, and the applicable scene and the service life mileage of the whole automobile are greatly expanded. Under the background that the new energy automobile market is rapidly expanded and the charging infrastructure is not completely popularized yet, the performance quality of the range extender directly determines the energy consumption level, the power response and the user experience of the whole automobile, the calibration work of the range extender system is used as a key link for optimizing the performance of the range extender system, and the efficiency and the accuracy of the range extender system have decisive influence on the energy conversion efficiency, the fuel economy and the running stability of the range extender A power generation efficiency optimization method for a range extender system of a range extender electric vehicle in China patent literature relates to the technical field of range extender calibration. The power generation efficiency optimization method of the range extender system of the range extender electric automobile comprises the following steps of S1, completing the calibration of an engine and a generator, S2, testing the economy of the range extender system on a range extender rack or a whole automobile, S3, installing and referencing a combustion analyzer to adjust calibration control parameters so as to improve the combustion stability of an engine working area, S4, repeating the steps S2 and S3, recording and comparing various technical indexes of the engine until meeting the design development target of the range extender or the optimization effect reaches the limit, S5, sorting the test results before and after optimizing the calibration data and forming corresponding reports, and outputting the optimized calibration data. The prior art has the following defects that when Cheng Qiyun is increased, the range extender generates power according to a calibrated working point and operates at an optimal working point, but the prior art indirectly causes the insufficient conversion efficiency of fuel and electric energy due to low calibration efficiency and incomplete working condition coverage. Disclosure of Invention The invention provides a method for facilitating calibration performance of a range extender system, which aims to solve the technical problem of how to improve the conversion efficiency between the fuel and the electric energy of the range extender, and is characterized by comprising the following steps: S1, electrically connecting a high-voltage loop of a range extender system with a high-voltage loop of a power cabinet, and directly feeding back electric energy generated in the whole performance and economical calibration process of the range extender to the power cabinet; S2, a combustion analyzer is integrated into an engine detection loop, and the standard quantity of the range-extending system is adjusted according to the monitoring parameters of the combustion analyzer until the performance, the oil consumption and the engine stability of each working point of the engine are adjusted to the optimal state; S3, the GCU realizes the regulation and control of the running state of the range-extending system through an upper computer, and an electronic injection controller is responsible for controlling the electronic injection system; S4, the GCU adjusts the running rotating speed of the range-extending system through the upper computer, and the electronic injection controller synchronously adjusts the opening of the throttle valve through the upper computer so as to perform calibration and optimization work on all working condition points; S5, selecting an optimal working curve of the range-extending system by analyzing a performance MAP graph of the range-extending system, and adapting the selected working curve into the GCU, wherein the range-extending system can be operated in the working curve through joint regulation and control of the GCU and the electronic injection controller, so that the working efficiency of the range-extending system is optimized; s6, retesting and verifying the select