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Method and system for operating a compressor for an engine

A technology of engine system and compressor, which is applied in the direction of combustion engine, engine control, engine components, etc. It can solve the problems that the turbocharger cannot provide engine air flow, cannot be recovered, and energy loss, etc., and achieves improved engine air and fuel control, fast Effects of Using Boost Pressure

Active Publication Date: 2021-01-08
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the compressor bypass valve is opened, the energy applied to the pressurized air is lost and this energy is not recoverable
Also, if the driver applies the accelerator pedal after the air pressure downstream of the compressor drops, the turbocharger may not be able to provide the desired engine airflow

Method used

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  • Method and system for operating a compressor for an engine
  • Method and system for operating a compressor for an engine
  • Method and system for operating a compressor for an engine

Examples

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Embodiment Construction

[0011]This description relates to operating an engine that includes a turbocharger compressor. If the turbocharger compressor is exposed to a specific pressure ratio or flow condition, it can experience oscillations in rotational speed.figure 1 An example engine including two compressors is shown. The pressure oscillation of the engine air intake can be operated byfigure 2 The electric compressor in the arrangement shown is lowered.image 3 An example engine operating sequence for controlling the pressure and flow in the engine air intake is shown.Figure 4Shows methods for operating the engine and reducing the possibility of compressor surge.

[0012]referencefigure 1 , The internal combustion engine 10 containing multiple cylinders is controlled by the electronic engine controller 12, one of which isfigure 1 Is shown in. The engine 10 includes a combustion chamber 30 and cylinder walls 32 with a piston 36 positioned therein and connected to a crankshaft 40. Combustion chamber 30 is sho...

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Abstract

The present application discloses methods and systems for operating an engine including two compressors. In one example, an electrically driven compressor is activated in response to a turbocharger compressor speed oscillation condition. The electrically driven compressor is activated to eliminate engine air intake flow oscillations that may be caused by the turbocharger compressor.

Description

Background technique[0001]The turbocharger can compress the air supplied to the engine to improve engine performance. The speed of the turbocharger can be controlled via a wastegate. The wastegate can be selectively opened and closed to adjust the compressor speed. Nevertheless, if the flow through the compressor changes greatly, the turbocharger compressor may oscillate. For example, if the driver goes from a higher driver demand to a lower driver demand to at least partially release the accelerator pedal, the compressor may start to oscillate. Closing the throttle valve quickly can cause the air flow through the compressor to decrease, causing the compressor to start oscillating. One way to reduce the possibility of compressor oscillation is to install a compressor bypass valve that allows air to return from the outlet of the compressor to the inlet of the compressor. However, when the compressor bypass valve is opened, the energy applied to the pressurized air is lost and the ene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B37/12F02B37/04F02B37/18
CPCF02B37/04F02B37/12F02B37/18F02B2037/122F02B37/14F02B39/10F02D41/0005F02D41/0007Y02T10/12Y02T10/40
Inventor 肖柏韬H-R·奥斯莎拉A·N·班克
Owner FORD GLOBAL TECH LLC