System and method for controlling alternator or integrated starter generator output voltage

Patent metadata

Field	Value
Publication number	US-10322708-B2
Application number	US-201113191702-A
Country	US
Kind code	B2
Filing date	Jul 27, 2011
Priority date	Jul 27, 2011
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

An automotive vehicle includes an engine, an alternator or integrated starter generator, and at least one controller. The at least one controller reduces voltage output of the alternator or integrated starter generator prior to initiating an auto stop of the engine.

First claim

What is claimed is:

1. A vehicle comprising:
a battery;
an engine;
an alternator; and
a controller configured to,
responsive to a command to autostop the engine, reduce voltage output of the alternator to a first target greater than an output voltage of the battery at a first rate that depends on ambient light level, and
responsive to vehicle speed becoming zero, reduce the voltage output at a second rate different than the first rate and initiate the autostop.

2. The vehicle of claim 1 wherein the controller is further configured to reduce the voltage output of the alternator from the first target voltage to a second target voltage approximately equal to the voltage output of the battery.

3. A vehicle comprising:
a battery;
an engine;
an integrated starter generator (ISG); and
a controller configured to,
responsive to a command to autostop the engine, reduce voltage output of the ISG to a first target greater than an output voltage of the battery at a first rate that depends on ambient light level, and
responsive to vehicle speed becoming zero, reduce the voltage output at a second rate different than the first rate and initiate the autostop.

4. The vehicle of claim 3 wherein the controller is further configured to reduce the voltage output of the ISG from the first target voltage to a second target voltage approximately equal to the voltage output of the battery.

Assignees

• Tomik Filip
• Rademacher Eric Michael
• Gibson Alexander Oconnor
• Demarco John Anthony
• Griffin Chad Everette
• Pebley Kirk
• Ford Global Tech Llc

Inventors

• Tomik Filip
• Rademacher Eric Michael
• Gibson Alexander O'Connor
• Demarco John Anthony
• Griffin Chad Everette
• Pebley Kirk

Classifications

• B60W2520/10

  Longitudinal speed · CPC title

• B60W30/18018

  Start-stop drive, e.g. in a traffic jam · CPC title

• B60W10/08

  including control of electric propulsion units, e.g. motors or generators · CPC title

• B60W10/06 Primary

  including control of combustion engines · CPC title

• B60W2710/08

  Electric propulsion units · CPC title