CN-122009137-A - Power generation control method and device of range extender, engineering machinery vehicle and storage medium

CN122009137ACN 122009137 ACN122009137 ACN 122009137ACN-122009137-A

Abstract

The invention discloses a power generation control method and device of a range extender, an engineering mechanical vehicle and a storage medium. The range extender comprises a generator and an engine, and the power generation control method of the range extender comprises the steps of determining that the generator adopts rotational speed control when the range extender is in a working state, obtaining actual torque of the generator and setting an upper limit value of power generation torque of the generator, determining that the engine adopts torque control, determining actual torque of the engine according to the engine required torque of the engine, and correcting the engine required torque based on the actual torque of the generator and the actual torque of the engine. The invention ensures that the range extender continuously and stably generates electricity and provides uniform and reliable power for rotary tillage parts of the power take-off device, thereby ensuring the continuity and consistency of rotary tillage operation of the whole vehicle.

Inventors

ZHAN DONGHONG
SHI MEILI
LOU BINGMIN

Assignees

潍柴动力股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260414

Claims (10)

1. The power generation control method of the range extender is characterized in that the range extender hybrid power system comprises the range extender, the range extender comprises a generator and an engine, and the power generation control method of the range extender comprises the following steps: When the range extender is in a working state, determining that the generator adopts rotational speed control, acquiring actual torque of the generator and setting an upper limit value of the generated torque of the generator; Determining that the engine adopts torque control, and determining an actual engine torque according to an engine demand torque of the engine to correct the engine demand torque based on the actual generator torque and the actual engine torque.
2. The power generation control method of the range extender according to claim 1, wherein the range extender hybrid system further comprises a power take-off device connected with the power generator; before setting the upper limit value of the generated torque of the generator, the method further comprises: acquiring the required rotating speed of a generator and the electric power for the generator to take power; setting an upper limit value of the power generation torque of the generator, comprising: And setting an upper limit value of the generating torque of the generator according to the required rotating speed of the generator and the electric power.
3. The power generation control method of the range extender according to claim 2, wherein obtaining the required rotation speed of the generator includes: And determining the required rotating speed of the generator according to the required rotating speed of the power taking device, or looking up a table based on the required generating power to obtain the required rotating speed of the generator.
4. The power generation control method of the range extender according to claim 2, wherein the range extender hybrid system further comprises a driving motor and a power battery, the driving motor being connected with the power battery through a driving motor controller; acquiring electric power for power take-up of the generator, comprising: Acquiring a current discharge power limit value of the power battery, and determining the power consumption of the driving motor based on the throttle requirement; and determining the electric power used by the generator to take power according to the current discharge power limit value and the electric power.
5. The power generation control method of the range extender according to claim 1, wherein determining an engine actual torque from an engine demand torque of the engine includes: And determining the engine demand torque of the engine based on the power battery SOC value of the power battery, and determining the actual engine torque according to the engine demand torque of the engine.
6. The power generation control method of the range extender according to claim 1, characterized in that correcting the engine demand torque based on the generator actual torque and the engine actual torque includes: If the actual torque of the generator is positive, the engine demand torque is corrected according to the generator demand rotational speed and the generator actual rotational speed of the generator on the basis of the actual torque of the engine; And if the actual torque of the generator is a negative value, acquiring a charging torque limit value of the generator on the basis of the actual torque of the engine, and correcting the engine required torque according to the charging torque limit value.
7. The power generation control method of the range extender according to claim 6, wherein obtaining the charging torque limit value of the power generator includes: and determining the charging torque limit value of the generator according to the power generation torque upper limit value, the power battery charging power limit value and the driving motor required power.
8. A power generation control device of a range extender, characterized in that a range extender hybrid system includes a range extender, the range extender includes a generator and an engine, the power generation control device of the range extender includes: The torque value determining module is used for determining that the generator adopts rotational speed control when the range extender is in a working state, obtaining the actual torque of the generator and setting the upper limit value of the power generation torque of the generator; The power generation control module is used for executing the determination that the engine adopts torque control and determining the actual engine torque according to the engine required torque of the engine so as to correct the engine required torque based on the actual generator torque and the actual engine torque.
9. The engineering mechanical vehicle is characterized by comprising a range-extending hybrid power system, wherein the range-extending hybrid power system comprises a range extender, a power taking device, a driving motor and a power battery, the range extender comprises a generator and an engine, the generator is connected with the power battery through a generator controller, the power taking device is connected with the generator, and the driving motor is connected with the power battery through a driving motor controller; the construction machine vehicle further includes: at least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the power generation control method of the range extender of any one of claims 1 to 7.
10. A computer-readable storage medium storing computer instructions for causing a processor to execute the power generation control method of the range extender of any one of claims 1 to 7.

Description

Power generation control method and device of range extender, engineering machinery vehicle and storage medium Technical Field The invention relates to the technical field of engineering machinery vehicles, in particular to a power generation control method and device of a range extender, an engineering machinery vehicle and a storage medium. Background With the deep integration of agricultural mechanization and new energy technology, agricultural tractors are being used as core equipment for agricultural production, and are gradually upgraded towards the direction of mixed motion and intelligence so as to meet the requirements of working efficiency, fuel economy and environmental protection. The range extender hybrid power system has the core advantages of 'pure electric driving experience and flexible fuel energy supplementing', is increasingly applied to the field of agricultural tractors, charges a power battery or directly supplies a driving motor through a range extender (engine and generator), realizes power output of tractor driving and operation, effectively solves the problems of insufficient endurance and inconvenient energy supplementing of the traditional pure electric tractor, and simultaneously greatly reduces oil consumption and tail gas emission in the operation process compared with the traditional fuel oil tractor. In the core operation scene of the tractor, rotary tillage operation is a key process for guaranteeing farmland soil preparation quality, and the power taking mode of rotary tillage parts directly influences operation effect and system stability. In the existing part of the range-extending hybrid power system of the agricultural tractor, in order to simplify the power transmission structure and improve the energy utilization efficiency, the power taking of the rotary tillage part is directly derived from the range-extending hybrid power system, namely, the mechanical energy of the range extender is transmitted to the rotary tillage part through a power output shaft (PTO), and the rotary tillage knife roller is driven to rotate to complete the soil crushing and leveling operation. The power taking mode omits an additional independent driving device, reduces the manufacturing cost and the structural complexity of the whole vehicle, and has obvious application value in large-scale farmland operation. However, the rotary tillage working environment of the agricultural tractor is complex and changeable, and soil resistance is influenced by various factors such as soil texture, water content, cultivation depth, crop stubble amount and the like, and strong transient fluctuation is presented. In the actual operation process, when the rotary tillage component encounters obstacles such as hard soil blocks, broken stones, dense stubbles and the like, the soil resistance can be increased instantaneously, so that the force taking torque of the rotary tillage component is increased rapidly, and when the obstacles are cleared or enter a soft soil area, the soil resistance can be reduced rapidly, and the force taking torque is reduced rapidly. The transient change of the torque can directly act on the power output end of the range-extending hybrid power system, and the rotational speed stability of the range extender is a serious challenge. Disclosure of Invention The invention provides a power generation control method and device of a range extender, an engineering mechanical vehicle and a storage medium, and aims to solve the problems that when an existing agricultural tractor range-extending hybrid power system is adapted to rotary tillage operation, the transient fluctuation of a power taking torque is large, the rotating speed stability of the range extender is poor, the operation quality and the reliability of the range-extending hybrid power system are affected and the like. According to an aspect of the present invention, there is provided a power generation control method of a range extender, a range extender including a range extender, the range extender including a generator and an engine, the power generation control method of the range extender including: when the range extender is in a working state, determining that the generator adopts rotational speed control, and acquiring the actual torque of the generator and setting the upper limit value of the generated torque of the generator; the engine is determined to employ torque control, and an engine actual torque is determined from an engine demand torque of the engine to correct the engine demand torque based on the generator actual torque and the engine actual torque. Optionally, the range-extending hybrid power system further comprises a power take-off device, and the power take-off device is connected with the generator; Before setting the upper limit value of the generated torque of the generator, the method further comprises: Acquiring the required rotating speed of the generator and the electric power for the generator to