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Engine supercharger surge identification and control method

A control method and supercharger technology, applied in engine control, engine components, combustion engines, etc.

Active Publication Date: 2020-10-20
ANHUI JIANGHUAI NAVISTAR DIESEL ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the risks and problems of turbocharger surge encountered in the above-mentioned prior art, the present invention proposes a method for identification and control of turbocharger surge in an engine, in order to realize that it does not affect the thermal management of the engine, does not affect the emission of the engine, Solve the problem of engine turbocharger surge under different combustion modes without increasing costs

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  • Engine supercharger surge identification and control method
  • Engine supercharger surge identification and control method
  • Engine supercharger surge identification and control method

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Embodiment Construction

[0034] In this embodiment, a structural diagram of a typical engine intake and exhaust system applicable to an engine supercharger surge identification and control method, as shown in figure 2 As shown, the engine S1 is equipped with an intake throttle valve S5 on the intake pipeline, an exhaust throttle valve S6 on the exhaust pipeline, and a supercharger S4 and EGR between the intake and exhaust pipelines. Valve S7, engine electronic control unit ECU S3 obtains engine input signal S2, and outputs various control signals to intake throttle valve S5, exhaust throttle valve S6, and EGR valve S7 to reduce engine emissions and achieve normal engine operation. Such as image 3 As shown, the engine input signal S2 is the engine speed obtained from multiple sensors, the pressure before supercharging, the pressure after supercharging, the pressure before the swirl, the intake air flow, and the engine torque obtained from the internal model value of the engine electronic control unit...

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Abstract

The invention discloses an engine supercharger surge identification and control method. The engine supercharger surge identification and control method comprises the following steps that 1) an ECU calculates a plurality of supercharger surge intervention conditions based on an engine input signal; 2) if supercharger surge intervention conditions are satisfied, a step 3 is executed, otherwise, a step 5 is performed; 3) the ECU outputs different anti-surge control signals according to different engine combustion modes to control the supercharger surge; 4) the ECU calculates a plurality of supercharger surge exit conditions according to the engine input signal; 5) if any supercharger surge exit condition is met, a step 6 is executed, and otherwise, the step 1 is executed; and 6) the ECU outputs a control signal, so that an intake throttle valve, an EGR valve and an exhaust throttle valve no longer perform anti-surge target opening. By means of the engine supercharger surge identificationand control method, engine thermal management and engine emission are not affected, cost is not increased, and surge problems of an engine supercharger in different combustion modes are solved.

Description

technical field [0001] The invention belongs to the field of engine control, in particular to a method for identifying and controlling surge of an engine supercharger. Background technique [0002] Turbocharger surge is the loss of flow of the compressor diffuser blades and impeller blades. The main reasons are: sudden decrease in intake air volume; abnormal increase in turbocharger speed; sudden change in engine operating conditions; Vibrating wire etc. The occurrence of surge will produce noises such as howling, which will deteriorate fuel economy and seriously damage compressor components. [0003] At present, engine efficient thermal management technology is becoming more and more popular and diversified. Using air intake throttle valve, exhaust throttle valve, exhaust gas recirculation (Exhaust Gas Re-circulation, EGR for short) valve and other means to improve engine thermal management and reduce engine Emissions have become a key choice for the current engine techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/22F02D41/00F02D9/08F02M26/05
CPCF02D41/22F02D41/0007F02D41/0002F02D41/0047F02D9/08F02D2200/1002F02D2200/1012F02M26/05Y02T10/12
Inventor 陈志超张金鹤杨海飞胡博文
Owner ANHUI JIANGHUAI NAVISTAR DIESEL ENGINE CO LTD
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