Browse Prior Art Database

ENGINE AIR BOOST SYSTEM

IP.com Disclosure Number: IPCOM000171162D
Publication Date: 2008-May-30

Publishing Venue

The IP.com Prior Art Database

Abstract

One implementation of an air boost system for an engine includes a boost device and an accumulator adapted to store pressurized fluid and selectively provide pressurized fluid to the boost device. A pump may deliver fluid under pressure to one or both of the accumulator and the boost device in at least some operating conditions. A first control valve may be disposed between the pump and the accumulator to control fluid flow to the accumulator, and a bypass may be provided between the pump and the first control valve. The bypass may, in at least some operating conditions, permit at least some of the pressurized fluid from the pump to bypass the accumulator and be delivered to the boost device. In one form, the accumulator is carried by the boost device in a compact unit.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 14

ENGINE AIR BOOST SYSTEM

TECHNICAL, FIELD
[0001] The field to which this disclosure generally relates includes engine systems

including a boost device.

BACKGROUND
[0002] Air boost devices, such as turbochargers, may include hydraulically driven

devices, electrically driven devices, belt driven devices and pneumatically driven devices. These devices may be driven directly by the engine, such as with a belt or via a hydraulic pump (which may be driven by the engine), or via an alternator (which is driven by the engine). In any case, the economical use of energy may be important due to sizing considerations, he1 economy considerations and performance considerations.

SUMMARY OF EXEMPLARY EMBODIMENTS OF THE INVENTION
[0003] One implementation of an air boost system for an engine includes a boost

device having an output that is delivered to the engine to support operation of the engine and an accumulator adapted to store pressurized fluid and, in at least some operating conditions, provide pressurized fluid to the boost device. A pump may be communicated with the accumulator and the boost device, and is actuated to deliver fluid under pressure to one or both of the accumulator and the boost device in at least some operating conditions. A first control valve may be disposed between the pump and the accumulator to control fluid flow to the accumulator, and a bypass may be provided between the pump and the first control valve. The bypass may, in at least some operating conditions, permit at least some of the pressurized fluid from the pump to bypass the accumulator and be delivered to the boost device. Accordingly, in at least some operating conditions, fluid from the accumulator may be delivered to the boost device.
[0004] One exemplary method of providing power to a boost device includes

selectively providing pressurized fluid from a pump to the boost device to provide energy to the boost device, selectively providing pressurized fluid from a pump to an a...