METHOD TO MANUFACTURE A THROTTLE VALVE FOR AN INTERNAL COMBUSTION ENGINE PROVIDED WITH A CONDITIONING CIRCUIT

• US 20190323437A1
• Filed: 07/01/2019
• Published: 10/24/2019
• Est. Priority Date: 06/26/2014
• Status: Active Grant

• Current Assignee: Marelli Europe SPA
• Original Assignee: Magneti Marelli S.p.A.
• Inventors: Musolesi, Stefano, Colli, Marcello
• Granted Patent: US 10,968,840 B2
• Time in Patent Office: Days
• CPC Class Codes: F02D 2001/006 Assembling; Disassembling; Replacing
• CPC Class Codes: F02D 9/1035 Details of the valve housing
• CPC Class Codes: F02D 9/107 Manufacturing or mounting details
• CPC Class Codes: F02D 9/1075 Materials, e.g. composites
• CPC Class Codes: F02D 9/108 Plastics
• CPC Class Codes: F02D 9/1085 Non-organic materials, e.g. metals, alloys, ceramics
• CPC Class Codes: F02F 2200/00 Manufacturing
• CPC Class Codes: F02M 31/102 Particular constructional characteristics of the shape of the heat exchange surfaces
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A method to manufacture a throttle valve for an internal combustion engine comprising a valve body having a seat and a tube for the passage of conditioning fluid; an actuating device, which controls the rotation of a throttle plate; and a substantially uniform layer of a structural and heat-conducting resin interposed between the seat and the tube and applied on the entire available surface of the seat; the method comprising the steps of manufacturing the valve body provided with the seat by causing a first metal material to undergo a die casting process; applying a trace of the structural and thermosetting resin on the bottom of the seat; and inserting the tube into the seat so as to obtain a substantially uniform layer of the structural and thermosetting resin, which is interposed between the seat and the tube.

Claims

1. A method to manufacture a throttle valve (1) for an internal combustion engine comprising a valve body (2) entirely made of a first metallic material;

an actuating device, which controls the rotation of a throttle plate (5) around a rotation axis (7);

an actuating device conditioning circuit (17) defined in the valve body (2) comprising a tube (19) for the passage of a conditioning fluid, which is housed in a seat (18) defined in the valve body (2) and is made of a second metallic material able to conduct heat; and

a substantially uniform layer (S) of a structural and heat-conducting resin interposed between the seat (18) and the tube (19) and applied on the entire available surface of the seat (18);

the method comprising the steps of;

manufacturing the valve body (2) provided with the seat (18) by causing the first metal material to undergo a die casting process;

manufacturing the tube (19) in the second metallic material chosen among steel, preferably stainless steel, or aluminum or copper;

applying a trace (T) of the structural and thermosetting resin on the bottom of the seat (18); and

inserting the tube (19) into the seat (18) such that the resin present on the bottom of the seat (18) moves upwards so as to completely skim an inner surface (20) of the seat (18) and partially the outer surface (21) of the tube (19) so as not to protrude from the seat (18) towards an upper surface (22) of the valve body (2) and so as to obtain a substantially uniform layer (S) of the structural and thermosetting resin, interposed between the seat (18) and the tube (19).

2. A method according to claim 1, wherein the valve body (2) is subject to a thermal treatment to cause the polymerization of the structural and thermosetting resin.