CN-116007947-B - PEMS test method and system for motor sweeper engine

CN116007947BCN 116007947 BCN116007947 BCN 116007947BCN-116007947-B

Abstract

The invention provides a PEMS test method and system for an engine of a motor sweeper, and the method comprises the steps of obtaining an engine model corresponding to a target motor sweeper, building an engine test bench according to the engine model, installing and debugging PEMS equipment on the engine test bench, obtaining all operation modes related to the target motor sweeper, testing the engine test bench according to test conditions corresponding to each operation mode, and monitoring rotation speed data and emission data of the engine test bench in each test process to evaluate and obtain a PEMS emission result of the motor sweeper according to the rotation speed data and the emission data. According to the PEMS test method for the engine of the sweeper, provided by the invention, the actual road operation working condition of the sweeper is simulated for testing, so that the non-road emission test time of the sweeper can be greatly shortened.

Inventors

CHANG XIAOBO
CHEN XINHAI
XIAO YOULONG
Ding Zhiren
JIANG QIRUI

Assignees

江铃汽车股份有限公司

Dates

Publication Date: 20260505
Application Date: 20230118

Claims (8)

1. A PEMS test method for a motor sweeper engine, the method comprising: acquiring an engine model corresponding to a target motor sweeper, building an engine test bench according to the engine model, and installing and debugging PEMS equipment on the engine test bench; Acquiring all operation modes related to the target sweeper so as to test the engine test bench according to test conditions corresponding to each operation mode; The operation modes comprise a first operation mode and a second operation mode, and the step of acquiring all operation modes related to the target sweeper to test the engine test bench according to the test condition corresponding to each operation mode comprises the following steps: Acquiring first operation mode data and second operation mode data corresponding to the target motor sweeper from a preset torque data table according to the engine model, wherein the first operation mode data comprises a first preset initial torque value and a first preset torque increment corresponding to the first preset initial torque value, and the second operation mode data comprises a second preset initial torque value and a second preset torque increment corresponding to the second preset initial torque value; controlling a vacuum suction head in the engine test bench to be opened according to the first preset initial torque value, and increasing the applied torque of the engine test bench by the first preset torque increment every a first preset time; And monitoring the rotating speed data and the emission data of the engine test bench in each test process, and evaluating and obtaining a PEMS emission result of the sweeper according to the rotating speed data and the emission data.
2. The PEMS test method for an engine of a motor sweeper of claim 1, wherein said step of acquiring all operation modes associated with said target motor sweeper to test said engine test bench according to test conditions corresponding to each of said operation modes further comprises: and controlling the vacuum suction head and the rolling brush in the engine test bench to be simultaneously opened according to the second preset initial torque value, and increasing the applied torque of the engine test bench by the second preset torque increment every second preset time.
3. The PEMS test method for an engine of a motor sweeper of claim 2, wherein said step of acquiring all operation modes associated with said target motor sweeper to test said engine test bench according to test conditions corresponding to each of said operation modes further comprises: Judging whether the current torque of the target sweeper is larger than a corresponding torque threshold value in the current working mode; And if the current torque of the target motor sweeper is larger than the corresponding torque threshold value in the current working mode, controlling the engine test bench to carry out repeated tests according to the corresponding test conditions in the current working mode.
4. The PEMS test method of a motor sweeper engine according to claim 3, wherein if the current torque of the target motor sweeper is greater than the corresponding torque threshold in the current working mode, the step of controlling the engine test bench to perform the repeated test according to the corresponding test condition in the current working mode comprises: Acquiring the work output by the engine test bench, judging whether the work output by the engine test bench reaches a preset multiple of the engine cycle work or acquiring the duration of the engine test bench in the current working mode so as to judge whether the duration reaches a first preset duration threshold; And if the power output by the engine test bench reaches the preset multiple of the engine cycle power or the duration reaches the first preset duration threshold, acquiring the test data of the engine test bench in each test process.
5. A PEMS test method for an engine of a motor sweeper according to claim 3, wherein the step of monitoring rotational speed data and emission data of the engine test bench during each test to evaluate PEMS emission results of the motor sweeper based on the rotational speed data and the emission data comprises: calculating output work of the target motor sweeper in two working modes according to the rotating speed data, and calculating the emission ratio of each pollutant according to the emission data and the output work.
6. A PEMS test method for an engine of a motor sweeper according to claim 3, wherein said emission data includes emissions of CO, NO and NO2, said calculating output power of said target motor sweeper in two operation modes based on said rotational speed data, and calculating an emission ratio of each pollutant based on said emission data and output power includes: The emission ratio of each pollutant was calculated according to the following formula: Wherein, the Represent the first The corresponding emission ratio of the species of the pollutant, Represent the first The amount of emissions corresponding to the amount of the seed pollutants, Represent the first The output work under the secondary circulation is performed, Represent the first The output work under the secondary circulation is performed, Indicating the output tool at the current cycle.
7. A PEMS test system for a motor sweeper engine, said system comprising: the test bench construction module is used for acquiring an engine model corresponding to the target motor sweeper, constructing an engine test bench according to the engine model, and installing and debugging PEMS equipment on the engine test bench; The test execution module is used for acquiring all operation modes related to the target motor sweeper so as to test the engine test bench according to the test conditions corresponding to each operation mode; The test execution module further includes: the test condition acquisition unit is used for acquiring first operation mode data and second operation mode data corresponding to the target sweeper from a preset torque data table according to the engine model, wherein the first operation mode data comprises a first preset initial torque value and a first preset torque increment corresponding to the first preset initial torque value, and the second operation mode data comprises a second preset initial torque value and a second preset torque increment corresponding to the second preset initial torque value; The first operation mode control unit is used for controlling the vacuum suction head in the engine test bench to be opened according to the first preset initial torque value and increasing the applied torque of the engine test bench by the first preset torque increment at intervals of a first preset time; and the emission evaluation module is used for monitoring the rotating speed data and the emission data of the engine test bench in each test process so as to evaluate and obtain the PEMS emission result of the sweeper according to the rotating speed data and the emission data.
8. The PEMS test system for a motor sweeper engine as recited in claim 7, wherein said test execution module further comprises: And the second operation mode control unit is used for controlling the vacuum suction head and the rolling brush in the engine test bench to be simultaneously started according to the second preset initial torque value, and increasing the applied torque of the engine test bench by the second preset torque increment every second preset time.

Description

PEMS test method and system for motor sweeper engine Technical Field The invention relates to the technical field of PEMS (plasma enhanced chemical vapor deposition) testing, in particular to a PEMS testing method and system for a motor sweeper engine. Background With the increasingly strict requirements of emission regulations on pollutants discharged by non-road mobile machines, the requirements are that whole vehicle PEMS (PEMS is a short-term of portable emission test system) tests are carried out on the non-road mobile machines, so that the emission level of the whole vehicle under the actual use conditions is determined, and the emission pollution of the whole vehicle is further reduced. The conventional EMS test method is used for carrying out PEMS test on the motor sweeper, the emission characteristics of the motor sweeper under the actual operation condition cannot be reflected, the repeatability is poor, the operability is poor, the use is complex, and a method for effectively carrying out PEMS test on the motor sweeper is lacking at present. Disclosure of Invention Based on the above, the invention aims to provide a PEMS test method and a system for the engine of the sweeper, which are used for simulating the actual road operation working condition of the sweeper to test, have good test repeatability and strong operability, and can greatly reduce the non-road emission test time of the sweeper. The invention provides a PEMS test method for a motor sweeper engine, which comprises the following steps: acquiring an engine model corresponding to a target motor sweeper, building an engine test bench according to the engine model, and installing and debugging PEMS equipment on the engine test bench; Acquiring all operation modes related to the target sweeper so as to test the engine test bench according to test conditions corresponding to each operation mode; And monitoring the rotating speed data and the emission data of the engine test bench in each test process, and evaluating and obtaining a PEMS emission result of the sweeper according to the rotating speed data and the emission data. In summary, according to the PEMS test method of the motor sweeper engine, the actual road operation working condition of the motor sweeper is simulated to set a standard non-road test rule for the motor sweeper, so that the PEMS emission result of the motor sweeper engine can be obtained rapidly, and the non-road emission test time of the motor sweeper is greatly shortened. The method comprises the steps of firstly obtaining an engine model corresponding to a target motor sweeper related to the test, building an engine test bench according to the engine model, installing and debugging PEMS equipment on the bench, and then obtaining an operation mode related to the target motor sweeper, so that the engine test bench is subjected to simulation test according to test conditions under each operation mode, test data related to the engine test bench are effectively monitored, and further PEMS emission results of the motor sweeper are evaluated and obtained. Further, the operation modes include a first operation mode and a second operation mode, and the step of acquiring all operation modes related to the target sweeper to test the engine test bench according to the test condition corresponding to each operation mode includes: Acquiring first operation mode data and second operation mode data corresponding to the target motor sweeper from a preset torque data table according to the engine model, wherein the first operation mode data comprises a first preset initial torque value and a first preset torque increment corresponding to the first preset initial torque value, and the second operation mode data comprises a second preset initial torque value and a second preset torque increment corresponding to the second preset initial torque value; And controlling the vacuum suction head in the engine test bench to be opened according to the first preset initial torque value, and increasing the applied torque of the engine test bench by the first preset torque increment every a first preset time. Further, the step of acquiring all operation modes related to the target sweeper to test the engine test bench according to the test condition corresponding to each operation mode further includes: and controlling the vacuum suction head and the rolling brush in the engine test bench to be simultaneously opened according to the second preset initial torque value, and increasing the applied torque of the engine test bench by the second preset torque increment every second preset time. Further, the step of acquiring all operation modes related to the target sweeper to test the engine test bench according to the test condition corresponding to each operation mode further includes: Judging whether the current torque of the target sweeper is larger than a corresponding torque threshold value in the current working mode; And if the current torqu