Method and apparatus for restart when SSC is released

Patent metadata

Field	Value
Publication number	US-9920731-B2
Application number	US-201514956045-A
Country	US
Kind code	B2
Filing date	Dec 1, 2015
Priority date	May 8, 2015
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

A method for restart when Start-Stop Coasting (SSC) is released may include: determining whether a traveling vehicle satisfies a condition for releasing SSC after entry into SSC (S 100 ); determining whether emergency startup of the vehicle is required (S 200 ) when the traveling vehicle satisfies the condition for releasing SSC after entry into SSC; and performing a first startup process (S 300 ) in which a clutch ( 420 ) is engaged along with an operation of a starter motor ( 430 ) when the emergency startup of the vehicle is required.

First claim

What is claimed is:

1. A method for restart when Start-Stop Coasting (SSC) is released, the method comprising:
determining whether a traveling vehicle satisfies a condition for releasing SSC after entry into SSC;
determining whether an emergency startup of the traveling vehicle is required when the traveling vehicle satisfies the condition for releasing SSC after the entry into SSC; and
performing a first startup process in which a clutch is engaged along with an operation of a starter motor when the emergency startup of the traveling vehicle is required; and
performing a second startup process in which the clutch is engaged without the operation of the starter motor when the emergency startup of the traveling vehicle is not required,
wherein the performing a first startup process comprises performing a starter motor startup process of operating the starter motor to rotate an engine after entry into SSC, and performing a clutch engagement process of operating the clutch to couple the engine and a transmission, which are decoupled from each other, after entry into SSC,
wherein in the performing a first startup process, the performing a starter motor startup process and the performing a clutch engagement process are sequentially carried out,
wherein, in the performing a starter motor startup process, the starter motor is operated until a rotational speed of the engine is a predetermined rotational speed, which is a rotational speed in a predetermined error range relative to a rotational speed of a transmission.

2. The method of claim 1 , wherein the determining whether the emergency startup of the traveling vehicle is required comprises detecting an accelerator opening degree.

3. The method of claim 2 , wherein the determining whether the emergency startup of the traveling vehicle is required comprises determining whether the detected accelerator opening degree is equal to or greater than a predetermined accelerator opening degree.

4. The method of claim 1 , wherein, in the performing a starter motor startup process, fuel is injected into the engine.

5. The method of claim 1 , wherein, after the performing a starter motor startup process is completed, fuel is injected into the engine.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Lee Hyung-Ju
• Jo Kyu-Jin
• Yoo Jae-Woong

Classifications

• B60W2540/10

  Accelerator pedal position · CPC title

• F02N5/04

  of inertia type · CPC title

• B60W2030/1809

  Without torque flow between driveshaft and engine, e.g. with clutch disengaged or transmission in neutral · CPC title

• F02N2200/101

  Accelerator pedal position · CPC title

• B60W30/18072

  Coasting · CPC title