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Method and system for boost pressure control

A pressure and compressor technology, applied in electrical control, engine control, fuel injection control, etc., can solve the problems of boosting hysteresis, increasing the time to reach torque, etc.

Active Publication Date: 2017-11-28
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this increases the time to torque and can cause boost lag even with the electric supercharger running
Therefore, too much boost and too much torque can lead to handling problems

Method used

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  • Method and system for boost pressure control
  • Method and system for boost pressure control
  • Method and system for boost pressure control

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Embodiment Construction

[0014] The following description relates to improvements for devices with stepped boosts such as figure 1 A system and method of boost control in an engine system of the boosted engine system of ), wherein the turbocharger is staged downstream of the electromechanical supercharger. The controller can be configured to execute programs such as Figure 2-3 example program) to utilize an electric supercharger to reduce turbo lag while utilizing adjustments to the rotational speed of the supercharger motor and the opening of a bypass valve coupled across the supercharger to regulate boost Pressure overshoot. These adjustments may be used at frequencies complementary to boost pressure control wastegate valve adjustments. Under boost pressure overshoot conditions downstream of the turbocharger, the electric supercharger compressor speed can be controlled to choke airflow through the turbocharger, the supercharger speed being based on the compressor map (such as Figure 4 map) to ...

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PUM

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Abstract

Methods and systems are provided for controlling boost pressure in a staged engine system comprising a turbocharger and an upstream electric supercharger. In one example, a method may include coordinating the operation of the electric supercharger and an electric supercharger bypass valve and to open the electric supercharger bypass valve to reduce the extent and duration of electric supercharger over boost.

Description

technical field [0001] The present invention generally relates to methods and systems for regulating engine boost pressure in staged boost engine systems. Background technique [0002] The engine may be operated with a boosting device, such as a turbocharger or supercharger, to increase the mass air flow into the combustion chamber. Turbochargers and superchargers use an intake compressor to compress the intake air entering the engine. Additionally, one or more intake boost devices may be staged in series or in parallel to improve engine boost response. [0003] An example of a multi-stage booster engine is shown in US Patent 6,938,420 by Kawamura et al. In it, an electric supercharger driven by an electric motor and an electric supercharger bypass valve (ESBPV) are staged downstream of the turbocharger. In conditions when the turbocharger compressor is not spinning up, the ESBPV may be turned off and the electric supercharger may be spun up to provide momentary positive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/04F02B37/16F02B37/18F02D23/00F02D41/00F02B37/12
CPCF02B37/162F02B37/04F02B37/12F02B37/16F02B37/183F02D23/00F02D41/0007F02D2200/602F02B2037/122F02D41/10F02D11/10F02D2200/0406F02B37/14F02B37/18F02B39/10F02B2039/168Y02T10/12
Inventor 肖柏韬H-R·奥斯莎拉A·N·班克
Owner FORD GLOBAL TECH LLC