Direct manifold boost assist device with throttle body manifold volume isolation

Patent metadata

Field	Value
Publication number	US-9599013-B2
Application number	US-201313863186-A
Country	US
Kind code	B2
Filing date	Apr 15, 2013
Priority date	Apr 15, 2013
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

Methods and systems are provided for adjusting intake airflow through two parallel induction passages. In response to increased torque demand, intake airflow may be directed through a first induction passage including an exhaust-driven turbocharger compressor and through a second induction passage including an electric compressor. Further, after the turbocharger compressor increases speed, intake airflow may be directed again through the first induction passage to further increase boost.

First claim

The invention claimed is:

1. An engine method, comprising:
in response to a driver tip-in, temporarily opening a throttle to a threshold opening in a first induction flow passage, downstream of an exhaust-driven turbocharger compressor, the threshold opening maintained to increase a manifold pressure from below a threshold pressure to the threshold pressure, and
electrically driving an electric compressor to drive flow into an intake manifold through a second induction flow passage, in parallel with the first induction flow passage.

2. The method of claim 1 , further comprising closing the throttle in response to the manifold pressure increasing to the threshold pressure.

3. The method of claim 2 , wherein the threshold pressure is atmospheric pressure.

4. The method of claim 1 , wherein electrically driving the electric compressor includes driving the electric compressor at a speed based on a required boost level for a torque demand during the tip-in.

5. The method of claim 1 , further comprising opening the throttle in response to a boost pressure being greater than a manifold pressure.

6. The method of claim 5 , further comprising, upon opening the throttle in response to the boost pressure being greater than the manifold pressure, stopping electrically driving the electric compressor.

7. The method of claim 5 , wherein the opening the throttle in response to the boost pressure being greater than the manifold pressure is further responsive to a power level of the electric compressor decreasing below a threshold level.

8. The method of claim 1 , wherein the driver tip-in is indicated by an increase in pedal position.

9. The method of claim 1 , further comprising increasing spark retard during the driving the electric compressor to drive flow into the intake manifold through the second induction flow passage.

Assignees

• Ford Global Tech Llc

Inventors

• Ahrns Chris C

Classifications

• F02D41/10

  for acceleration · CPC title

• F02B37/14 Primary

  {Control} of the alternation between {or the operation of} exhaust drive and other drive of a pump, e.g. dependent on speed · CPC title

• F02D2200/0406

  Intake manifold pressure · CPC title

• F02B39/10

  electric · CPC title

• F02B37/16

  by bypassing charging air · CPC title