Assembly for an air circuit of a heat engine

Patent metadata

Field	Value
Publication number	US-10400665-B2
Application number	US-201515507565-A
Country	US
Kind code	B2
Filing date	Aug 26, 2015
Priority date	Aug 28, 2014
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

The invention relates to a fluid assembly (1) comprising: a first pipe (11), a second pipe (12) forming a bypass of a portion of the first pipe (11), comprising a compressor (15), and a switching system (10) for switching the fluid into either the second pipe (12) or said portion, having a first configuration allowing the fluid to circulate in the portion, and comprising a supporting member exerting a torque configured to keep the system (10) in the first configuration, and at least one area blocking the inlet or the outlet of the second pipe when the system (10) is in the first configuration, the system (10) being able to enter a second configuration allowing the fluid to circulate in the second pipe (12), the supporting member being such that the torque that it exerts on the system (10) drops when the system (10) passes from the first configuration to the second configuration.

First claim

The invention claimed is:

1. An assembly for an air circuit of a heat engine, comprising:
a first pipe capable of conveying fluid;
a second pipe extending between an inlet in the first pipe and an outlet in the first pipe, to form a bypass of a portion of the first pipe, the second pipe comprising a pressure-variation source; and
a switching system for switching fluid into one of either the second pipe or the portion of the first pipe, the switching system having a first configuration allowing the fluid to circulate mainly in said portion of the first pipe, the switching system comprising:
a holding device exerting a torque configured so as to bring or keep said switching system in the first configuration, and
at least one first area shutting off in the first configuration at least a portion of the inlet of the second pipe, and one second area shutting off in the first configuration at least a portion of the outlet of the second pipe,

the switching system being arranged to pass into a second configuration allowing the fluid to circulate mainly in the second pipe when the pressure variation generated in the second pipe by the source exceeds a predefined value, wherein the pressure variation exerts a torque on the at least one of the first and second areas of the switching system, enabling passage into the second configuration, despite a torque exerted by the holding device,
wherein the torque exerted by the holding device on the switching system decreases when the switching system passes from the first into the second configuration.

2. The assembly according to claim 1 , having no actuator dedicated to passing the switching system from the first into the second configuration.

3. The assembly according to claim 1 , the pressure-variation source being an electric supercharger arranged in the second pipe.

4. The assembly according to claim 1 , the switching system comprising at least one pivoting shutter, and the holding device comprising a spring and a lever rigidly connected to the pivoting shutter, through which the holding torque is exerted on the shutter, the spring comprising one fixed end and one movable end moving, in translation in relation to the lever, when the switching system passes from the first into the second configuration, the movement allowing a lever arm of the lever to be varied.

5. The assembly according to claim 4 , the lever comprising a housing in which a movable pin integral with the movable end of the spring moves in order to vary the lever arm.

6. The assembly according to claim 5 , the holding device defining a path guiding the movement of the movable pin in the housing so that the lever arm assumes a succession of predefined values when the switching system passes form the first into the second configuration.

Assignees

• Valeo Systemes De Controle Moteur

Inventors

• Martin Nicolas

Classifications

• F02B33/446 Primary

  having valves for admission of atmospheric air to engine, e.g. at starting · CPC title

• F02B39/10

  electric · CPC title