Engine system as well as running state optimal control method and device thereof

Abstract

The invention discloses an engine running state optimal control method which comprises the following stepss of: calibrating a first pressure threshold value pmin based on a pipeline between an air filter and a turbocharger in advance; acquiring the air inlet pressure P and the environmental pressure pe of the current turbocharger and obtaining a pressure difference value delta p between the air inlet pressure P and the environmental pressure pe; obtaining a first judgment result of the to-be-overhauled pipeline between the air filter and the supercharger under the condition that the pressure difference value delta p is smaller than the first pressure threshold value pmin; and outputting a control signal when the engine is controlled to be in a non-high-load state according to the first judgment result. The engine running state optimal control method can effectively solve the problem that the running states of the supercharger and the engine are affected by the air leakage of the pipeline between the air filter and the supercharger. On the basis, the invention also provides an engine running state optimal control device and an engine system applying the control device at the same time.

Description

technical field [0001] The invention relates to the technical field of diesel engines, in particular to an engine system and an operation state optimization control method and device thereof. Background technique [0002] The engine is currently the most efficient mobile power supply device. With the continuous improvement of national standards for engine emission requirements, the restrictions on the emission of particulate matter PM and nitrogen oxides NOx in engine exhaust gas have become increasingly stringent. Based on this, supercharging technology is widely used in engines. On the one hand, it can effectively control engine emissions, and at the same time greatly improve the economy and power of engines. [0003] In actual work, the factors that affect the running state of the supercharger and the engine mainly include: air filter blockage, supercharger surge, and air leakage from the air filter to the supercharger pipeline. [0004] In the prior art, it is only poss...

AI Technical Summary

Problems solved by technology

Since this solution uses a differential pressure sensor, the cost is high, and the engine cannot be restricted when the intake air is insufficient, and the problem of black smoke from the engine cannot be prevented.

In addition, for the turbocharger surge, the existing technology mainly prevents it in the engine matching stage, leaving a certain surge margin. There is no protection measure on the whole vehicle, and it cannot be used in extreme conditions or special circumstances. Supercharger and engine protection

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