Idle stop control device for vehicle equipped with automated manual transmission

Patent metadata

Field	Value
Publication number	US-9464715-B2
Application number	US-201314417803-A
Country	US
Kind code	B2
Filing date	Jul 19, 2013
Priority date	Sep 10, 2012
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

While a vehicle is decelerating starting at a braking start time, start-off pre-shifting starts when speed falls to a predetermined speed. At a vehicle stoppage time, an idle stop permission flag is not set to on if start-off pre-shifting is incomplete, even if idle stop permission conditions have been met. The idle stop permission flag is set to on when start-off pre-shifting is completed, and an idle stop flag is set to on and the engine stopped when engine rotational speed falls below a set speed. The engine is restarted in response to braking being released, and the idle stop flag is set to off and the idle stop control ended when the engine rotational speed reaches or exceeds a set speed. The restarting of the engine causes an engine-driven oil pump to dispense oil to be used as a medium to manifest an automatic clutch command hydraulic pressure.

First claim

The invention claimed is:

1. An idle stop control device for a vehicle equipped with an idle stop engine that is stopped when predetermined idle stop permission conditions, including vehicle stoppage, are met, and an automated manual transmission in which a gear train is automatically selected as a starting gear train via disengagement/engagement control of an automatic clutch, the automated manual transmission mediated by a medium supplied by a pump driven by the engine and start-off shifting control of a gear enmeshment mechanism, and power from the engine is outputted via the automatically selected starting gear train to allow the vehicle to start moving, the device comprising:
a start-off shifting completion assessment controller programmed to assess whether the start-off shifting control is complete when the vehicle is stopped, and to communicate when the start-off shifting control is complete.

2. The idle stop control device for the vehicle equipped with the automated manual transmission according to claim 1 , the automated manual transmission including a plurality of gear trains divided into two groups, one of the plurality of gear trains being the starting gear train, the automatic clutch being one of a plurality of automatic clutches, each gear train group including one of the automatic clutches, and the start-off shifting control enabling the gear enmeshment mechanism for the starting gear train of the plurality of gear trains to be shifted to a gear enmeshment position and the gear enmeshment mechanism for a gear train of the plurality of gear trains not used to start off to be shifted to a gear enmeshment position, wherein
the start-off shifting completion assessment controller is programmed to assess whether the start-off shifting control is complete when both shifting of the gear enmeshment mechanism for the starting gear train and shifting of the gear enmeshment mechanism for the gear train not used to start off are complete.

3. The idle stop control device for the vehicle equipped with the automated manual transmission according to claim 1 , wherein
the start-off shifting completion assessment controller is programmed to communicate when the start-off shifting control is not complete so as to prevent idle stop control.

Assignees

• Nissan Motor

Inventors

• Kawamoto Yoshinobu
• Takenaka Hiroyuki

Classifications

• F02D17/00

  Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling (controlling or rendering inoperative by varying inlet or exhaust valve operating characteristics F02D13/00) · CPC title

• F16H63/50 Primary

  Signals to an engine or motor · CPC title

• F02N2200/0802

  Transmission state, e.g. gear ratio or neutral state · CPC title

• B60W30/18018

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

• F02N2200/0801

  Vehicle speed · CPC title