Hybrid vehicle startup calibration system and method

Abstract

The invention discloses a start calibration system and method for a hybrid vehicle, and the system comprises a test bed which is disposed in a test room, and is used for placing a to-be-calibrated vehicle; an environment control device for adjusting the internal environment of the test room; a pipe control device for adjusting the temperature and pressure of each pipe connected with the to-be-calibrated vehicle; a charging device which is used for supplying power to the to-be-calibrated vehicle; a wide-range oxygen sensor which is used for collecting the information of exhaust gas discharged by an exhaust pipe when the to-be-calibrated vehicle is in use; an air-fuel ratio measurement instrument which is connected with the wide-range oxygen sensor, and is used for generating an air-fuel ratio curve according to the information, collected by the wide-range oxygen sensor, of exhaust gas; and a master console which is connected with the environment control device, the pipe control device, the charging device, the air-fuel ratio measurement instrument and an engine controller of the to-be-calibrated vehicle, and controls the operation of all connected devices, so as to complete the testing of the calibration parameters of the to-be-calibrated vehicle. The system can greatly improve the calibration efficiency.

Description

technical field [0001] The invention relates to the field of vehicle start-up calibration, in particular to a system and method for start-up calibration of a hybrid vehicle. Background technique [0002] At present, in order to meet the increasingly stringent emission and fuel consumption regulations, the electronic control technology of the engine has been widely used, and the subsequent calibration workload is also increasing. Among them, the starting calibration determines the starting performance of the vehicle in daily use, which depends on Due to the three factors of air volume preset value, fuel injection volume and starting ignition angle, it is time-consuming and labor-intensive to complete the calibration and development work such as single start and high-altitude start in the water temperature range of minus 30 degrees to 120 degrees. Development efficiency is low. In recent years, the hybridization of engines has become an obvious trend in the development of the...

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Problems solved by technology

[0004] In the type I (normal temperature emission) and type VI (low temperature emission) tests stipulated in the national standard of emission regulations 18352, the emissions in the start-up phase account for a large proportion of the entire test cycle, and ordinary start-up calibration tests cannot achieve the pollutants in the start-up phase. Real-time monitoring, it is impossible to complete the optimization of emission calibration at the same time

[0005] It can be seen that based on the existing method, it is a long, complicated and inefficient work process to complete an engine’s start-up calibration optimization and achieve calibration solidification, and it relies on the experience of engineers, and the accuracy and quality are not high.

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