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Mounting system for a resonating needle injection device

A technology for installing systems and fuel injection devices, which is applied in the direction of fuel injection devices, charging systems, low-pressure fuel injection, etc., and can solve problems such as unsuitable devices for heat resistance restrictions

Inactive Publication Date: 2012-07-11
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this does not fit within the volume constraints within the combustion chamber, and does not fit into the heat-resistant constraints of the device

Method used

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  • Mounting system for a resonating needle injection device
  • Mounting system for a resonating needle injection device
  • Mounting system for a resonating needle injection device

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] figure 1 A liquid ejection device 1 according to a first embodiment of the present invention is shown in . It comprises a tubular body 11 extending along a longitudinal axis A and elongated by a nozzle 13 . The nozzle 13 has a tubular shape of constant cross section, and the needle 12 is slidably fitted therein. The needle 12 comprises at its one end a head 120 forming a valve on a seat 130 of the nozzle 13 . A feed line 111 designed to conduct a liquid, such as fuel, runs in the device 1 from an inlet 112 around the needle 12 to the valve. The device 1 comprises a spring 14 which holds the head 120 of the needle 12 against the seat 130 in order to close the valve and normally prevent the flow of liquid.

[0017] The device 1 also comprises an actuator 10 with piezoelectric material capable of moving the head 120 of the needle 12 to open the valve. The actuator 10 and the needle 12 together constitute a mobile unit that is slidably mounted in the tubular body 11 . ...

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PUM

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Abstract

The invention relates to a device for injecting fuel over a cylinder head (2) of an engine, comprising a tubular body (11), an injection nozzle (13) forming an extension of the tubular body (11), a needle (12) extending coaxially to the nozzle (13) in the form of a rod, an end of which comprises a head (120) forming a valve on a seat (130) supported by the injection nozzle (13), an actuator (10) being capable of causing a movement of the head (120) so as to open the valve, the needle (12) being capable of axially resonating when the same is subjected to axial pulses at a predetermined nominal frequency by the actuator (10). A system for mounting the device comprises a spacer (3) for bearing on the cylinder head (2), as well as on a front surface (113) of the tubular body (11) at the connection to the nozzle (13).

Description

technical field [0001] The invention relates to a mounting system for a liquid injection device with a resonant needle and in particular for an engine. Background technique [0002] The known document FR 2889257 discloses an injection device whose opening is achieved by the resonance of a needle. Such a device comprises a tubular body, a nozzle extending the tubular body. The needle is disposed within the nozzle and extends longitudinally in the form of a rod. One end of the needle includes a head constituting a valve on a seat supported by the nozzle. The device also includes an actuator capable of moving the head to open the valve by axially resonating the needle at a given nominal frequency of axial pulses. This nominal frequency is usually between 15 and 30kHz, but can be higher. [0003] When the device is in operation, the head of the needle no longer presses against the seat but moves away from the seat to open the valve and allow fuel to pass. The nozzle is thus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/14F02M69/04
CPCF02M61/14F02M69/041
Inventor A·阿涅雷N·马莱克L·勒万
Owner RENAULT SA