# US 9,038,602 B2 · Mounting system for a resonating needle injection device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,038,602 B2
- Document ID: US9038602B2
- Status: Granted
- Kind: B2
- Application number: 13/392,140
- Filed: 2010-06-22
- Published: 2012-08-16
- Granted: 2015-05-26
- Earliest claimed: 2009-08-24
- Assignees: RENAULT s.a.s.
- Applicants: Andre Agneray; Nadim Malek; Laurent Levin
- Inventors: Andre Agneray; Nadim Malek; Laurent Levin
- Web page: https://patentgrep.com/patent/US9038602B2

## CPC

- F02M 69/041: {having vibrating means for atomizing the fuel, e.g. with sonic or ultrasonic vibrations}
- F02M 61/14: Arrangements of injectors with respect to engines; Mounting of injectors
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF

## Abstract

A device for injecting fuel over a cylinder head of an engine, including a tubular body, an injection nozzle forming an extension of the tubular body, a needle extending coaxially to the nozzle in a form of a rod, an end of which includes a head forming a valve on a seat supported by the injection nozzle, and an actuator configured to cause a movement of the head so as to open the valve, the needle configured to axially resonate when the same is subjected to axial pulses at a predetermined nominal frequency by the actuator. A system for mounting the device includes a spacer for bearing on the cylinder head, as well as on a front surface of the tubular body at the connection to the nozzle.

## Claims

### Claim 1

A system for installation of a fuel injector on an engine cylinder head, the system comprising:
the fuel injector, the fuel injector including:
a tubular body;
an injector nose prolonging the tubular body;
a needle extending coaxially to the nose in a shape of a rod and whose one end includes a head forming a valve on a seat carried by the injector nose;
an actuator configured to cause a displacement of the head to open the valve;
wherein the needle is configured to enter into axial resonance when subjected by the actuator to axial impulses at a given nominal frequency;
a brace configured to bear against one surface of the cylinder head and to bear against a front surface of the tubular body at a connection to the nose; and
a flange configured to be attached to the cylinder head and flattening the tubular body against the brace by bearing against a clamping shoulder,
wherein the brace and a portion of the tubular body between the clamping shoulder and the front surface have such lengths that a time of propagation of a sound wave in the portion of the tubular body between the clamping shoulder and the front surface, added to a time of propagation in the brace, is a multiple of one half-period of the nominal frequency.

### Claim 2 (depends on 1)

The system according to claim 1, wherein the brace comprises at least one inner groove and at least one outer groove.

### Claim 3 (depends on 2)

The system according to claim 2, wherein the grooves of the brace are distributed axially, alternating on the inside and the outside.

### Claim 4 (depends on 1)

The system according to claim 1, wherein the nominal frequency is in a range extending from 10 to 30 kHz.

### Claim 5 (depends on 1)

The system according to claim 1, wherein the brace surrounds a base of the nose.

### Claim 6 (depends on 2)

The system according to claim 2, wherein a depth of the inner groove and a depth of the outer groove exceed half of a thickness of a wall of the brace.