Vehicle control device with automatic engine stop function

Patent metadata

Field	Value
Publication number	US-9850825-B2
Application number	US-201314432492-A
Country	US
Kind code	B2
Filing date	Oct 2, 2013
Priority date	Oct 3, 2012
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

In a vehicle control device with an automatic engine stop function, when the engine is in a non-operating state and the shift lever is operated to the parking range, the engine is controlled to start to supply operating oil to a valve timing changing means. The valve timing changing means is thereupon caused to change the intake valve close timing (IVC) to a predetermined advance angle position and subsequently locked thereat. The engine is then controlled to stop.

First claim

The invention claimed is:

1. A vehicle control device for a vehicle with an automatic engine stop function, the vehicle being selectively operable either in EV mode in which the vehicle runs only by power of a motor or in HEV mode in which the vehicle runs by a power source including an engine, the vehicle control device comprising:
a pump driven by the engine for supplying an operating oil;
a valve timing change means that is supplied with the operating oil for changing an intake valve timing in a predetermined range between an advance side and a retard side, the valve timing change means being configured to lock the intake valve timing to a predetermined advance position in response to the engine being put in a non-operating state by an ignition OFF irrespective of presence or absence of the operating oil, the valve timing change means being configured to control the intake valve timing to a predetermined decompression valve timing when the engine is in the EV mode, wherein the predetermined advance position is more advanced than the predetermined decompression valve timing;
a shift lever that is operable by the driver and includes a parking range to achieve the vehicle parking state;
an engine controller that is configured, when the engine is in non-operating state and the shift lever is operated to the parking range,
to start the engine to supply the operating oil to thereby actuate the valve timing change means;
to change to and subsequently lock the valve timing change means into the predetermined advance position; and
to stop the engine thereafter.

2. The vehicle control device as claimed in claim 1 , wherein the engine controller is configured to actuate the valve timing change means after a predetermined time corresponding to the predetermined time period has elapsed from the start of the engine.

Assignees

• Nissan Motor

Inventors

• Orita Shuichi

Classifications

• F02N19/004

  Aiding engine start by using decompression means or variable valve actuation · CPC title

• F02N2011/0888

  DC/DC converters · CPC title

• F02D2041/001

  for engines with variable valve actuation · CPC title

• F02N2200/0803

  Parking brake state · CPC title

• F02D13/08

  for rendering engine inoperative or idling · CPC title