Engine stalling protection controlling method under high altitude condition

Abstract

The invention relates to an engine stalling protection controlling method under a high altitude condition. The engine stalling protection controlling method under the high altitude condition comprises steps as below: a. measuring the atmosphere pressure of an engine; b. according to a preset relationship chart of atmosphere pressure calibrated inside an electronic control unit (ECU), an engine target idle speed rotary speed, a first stalling protection rotary speed and a second stalling protection rotary speed, determining the calibration values of the mentioned rotary speeds corresponding with the measured atmosphere pressure; c. measuring the current rotary speed of the engine; d. judging whether the current rotary speed meets the conditions set by the following steps, if the answer is yes, corresponding process is conducted, otherwise returning to step c: d1. if the current rotary speed is lower than the first stalling protection rotary speed calibration value, at least one load device which currently runs is enabled to stop working and return to step c; d2. if the current rotary speed is lower than the second stalling protection rotary speed calibration value, at least one load device which currently runs is enabled to stop working and return to step c; d3. if the current rotary speed is larger than the engine target idle speed rotary speed, at least a part of load devices which stop working due to d1 and / or d2 is recovered to normal working, and then returning to step a.

Description

technical field [0001] The invention relates to an engine flameout protection control method, in particular to a method for realizing engine flameout protection control under high altitude conditions, and belongs to the technical field of engines. Background technique [0002] The development of China's automobile industry can be described as rapid progress, especially since entering the 21st century, it has developed into the second largest automobile consumer country in the world. However, due to China's vast territory, especially the vast high-altitude areas, the environment for automobile use is very complicated, especially compared with some other countries, it has the characteristics of high altitude and wide areas. This requires that the engine can still maintain a stable and reliable working state in high altitude areas, and can meet the needs of customers. Due to the thin air and poor air intake efficiency in high altitude areas, the stability of the engine idling ...

AI Technical Summary

Problems solved by technology

However, when the current environment of the vehicle reaches a certain altitude and the vacuum degree of the intake manifold is close to zero (when the vehicle load device is working at full load), the above two methods commonly used in sea level areas will be exhausted due to insufficient vacuum degree. There are hidden dangers of failure due to reasons such as poor air intake efficiency, which not only limits the vehicle's driving limit altitude to ensure stable engine idling, but also cannot effectively ensure the driving safety of the vehicle, and may cause accidents, thereby endangering personal life. safety and damage to property

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