Efficient phaser actuation supply system

Patent metadata

Field	Value
Publication number	US-9200547-B2
Application number	US-201314048392-A
Country	US
Kind code	B2
Filing date	Oct 8, 2013
Priority date	Oct 8, 2013
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

A hydraulic cam phaser includes at least one of an advance chamber and a retard chamber for receiving hydraulic fluid for advancing or retarding a rotational position of the camshaft. The hydraulic actuation system includes a hydraulic accumulator in selective communication with the at least one of the advance and retard chambers of the hydraulic cam phaser. A first system oil pump provides lubrication oil to the valvetrain system, and the hydraulic actuation system includes a second oil pump for supplying oil to the hydraulic accumulator. The second oil pump is controlled with a clutch device connecting the second oil pump to the engine drive system. The internal combustion engine includes a controller which controls actuation of the clutch device to actuate the clutch device during deceleration of the vehicle.

First claim

What is claimed is:

1. An internal combustion engine for a vehicle, comprising:
an engine block defining a plurality of cylinders:
a cylinder head mounted to the engine block and defining intake ports and exhaust ports in communication with the cylinders;
a valvetrain system including a plurality of intake valves disposed within the intake ports and a plurality of exhaust valves disposed within the exhaust ports;
a camshaft operable to open at least one of the plurality of i…

Assignees

• Gm Global Tech Operations Inc

Inventors

• Hayman Alan W
• Staley David R
• Staley Eric D

Classifications

• F01L2001/34446

  Mechanical Engineering · mapped topic

• F01M1/16

  Mechanical Engineering · mapped topic

• F01M1/12

  Mechanical Engineering · mapped topic

• F01L2001/34423

  Mechanical Engineering · mapped topic

• F01L1/3442 Primary

  Mechanical Engineering · mapped topic