Continental Automotive France

Federal-mogul Ignition Srl

Siemens Vdo Automotive Corporation

Federal-mogul Italy Srl

Other

Continental Automotive Gmbh

Hidria Aet D.o.o.

Hidria Aet Druzba Za Proizvodnjo Vzignih Sistemov in Elektronike D.o.o.

Sieva D.o.o., Pe Spodnja Idrija

Alain Ramond

Sandro Goretti

John Antony Burrows

Cyrille Patri

Bernd Last

Michel Boucard

Simon-Didier Venzal

Michel Suquet

Paul Tinwell

Gverino Ratosa

Marcel Guwang

Laura Beretta

Jure Golob

This device includes an outer casing having: a first tubular zone () to the inside of which a finger () is fastened; a second tubular zone () of larger outside diameter than that of the first tubular zone () and extending the first tubular zone (); and an elastically deformable part () of annular shape, extending in a plane transverse to the first tubular zone () and connecting the first tubular zone () to the second tubular zone (). The pressure sensor () is placed between, on one side, an element () integral with the finger and, on the other side, a fixed element (), called an interface, which is integral with the second tubular zone (). The interface () has an axial contact zone () for contact with an element constituting the second tubular zone.

Device incorporating a pressure sensor for measuring pressures within an internal combustion engine

Heater plug having a metal finger

A glow plug includes: a tubular body () having at one of its ends a plug head () as well as a zone for being fixed into a bore, an arm () mounted on the body () of the plug at the end opposite to the plug head (), and secured to the body () in a linking zone (), an elastically deformable portion (), located between the linking zone () with the arm () and the zone fixing the plug body (), such that the linking zone () is mobile and can move longitudinally relative to the so-called stationary fixing zone, and a pressure sensor () arranged between an element () secured to the linking zone () and a fixed element () of the plug.

Glow plug with integrated pressure sensor and body thereof

A method and a circuit for processing a signal supplied by a piezoelectric sensor () indicating the cylinder pressure of a piston engine such as a heat engine. Undesirable variations in the value of the signal supplied by the sensor and corresponding to plateaux in the pressure are compensated by a closed-loop servo control which is suitable for setting an output signal to a predetermined constant reference value, independently of undesirable variations in the signal from the sensor (). The value of the output signal is sampled, and at each sampling moment, if the absolute value of the variation in the output signal is less than a comparison value, the servo control is kept active. A circuit for processing and a pressure-measuring device including a circuit of this kind is also described.

Method and circuit for processing a signal supplied by a piezoelectric sensor, and pressure-measuring device for piston engine

Device for determining an error induced by a high-pass filter in a signal, including a unit () for calculating the error according to the formula:()=()&#x2212;()=&#xb7;&#x222b;((&#x3b1;)&#x2212;(&#x3b1;))()with: E(t) the value of the error induced by the high-pass filter, as a function of the time variable t, &#x3a0;the trigonometric constant, Fthe cutoff frequency of the high-pass filter, tthe initial instant, &#x3b1;integration variable, Vthe signal input to the high-pass filter, Vthe signal output by the high-pass filter,the mean value of the signal V. A method of correcting the error induced is also presented and applicable to the error correction of a piezoelectric pressure sensor.

Device for determining an error induced by a high-pass filter and associated error correction method

A device includes a pressure sensor (-) for measuring pressures inside the combustion chamber of a cylinder in an internal combustion engine. The device includes: an outer body (); a lug () extending partially into the combustion chamber; an inner housing () inserted into the body and surrounding an upper portion of the lug, the housing being secured to the lug and to the body and having an elastically deformable portion () between the two securing areas, characterized in that the housing () is secured to the body () at a securing area () extending in the upper portion of the body.

Device including a pressure sensor for measuring pressures inside the combustion chamber of an engine

Device for measuring cylinder pressure of an internal combustion engine includes a pressure sensor that includes a piezoelectric element associated with a capacitive element, and an output generating a first voltage representative of the cylinder pressure. A filtering module of the device filters parasitic low-frequency voltages and generates a second voltage free of these parasitic voltages. A control module delivers a control signal that is dependent on a switching parameter correlated with a stroke. A switching module, in response to the control signal, disconnects the input of the filtering module from the output of the pressure sensor during the first stroke and connects the input of the filtering module to the output of the pressure sensor during the second stroke. The first stroke corresponds to a compression stroke or to a combustion-expansion stroke, and the second stroke corresponds to an intake stroke or to an exhaust stroke.

Pressure measuring device and corresponding method

The spark plug comprises: &#x2014;a central electrode (), &#x2014;an insulating core () bearing the central electrode (), &#x2014;an external body () in which the insulating core () is mounted and which has a region () where the external body () is crimped onto the insulating core (), and&#x2014;a force sensor (). The force sensor () is mounted at the periphery of the external body () between, on the one hand, a bearing element () secured to a first peripheral region of the external body () and, on the other hand, a second peripheral region () of the external body (). The second peripheral region () of the external body () is further away from the crimping region () than the first peripheral region. The bearing element () is prestressed against the force sensor ().

Spark plug incorporating a pressure sensor

A glow plug includes: a tubular body () having at one of its ends a plug head as well as a fixing zone including elements () for being fixed in a bore, an arm () mounted on the body () of the plug at the end opposite to the plug head, and a pressure sensor () sealingly insulated from the corresponding cylinder. The arm () is fixed to an elastically deformable tubular zone () designed to project inside the cylinder. The pressure sensor () is mounted between the arm () and a support component () fixed inside the tubular body ().

Glow plug with integrated pressure sensor

A glow plug including a tubular body with elements for fixing it into a bore, an intermediate tubular part arranged inside the tubular body, a finger disposed inside the intermediate tubular part with a heating electrode, and a pressure sensor connected to the intermediate tubular part, wherein a face of the sensor facing the finger is pressed thereto.

Glow plug provided with a pressure sensor

A glow plug includes a glow plug body (), a pressure sensor arranged inside the glow plug body (), a threaded portion () on the outside of the glow plug body () and gripping elements (), generally of cylindrical form with a hexagonal section, enabling the body () to be gripped and screwed into a corresponding tapping, the gripping elements () being made from synthetic material.

Head of a glow plug provided with a pressure sensor

This body () has on its outer surface both a screw thread () adapted for fixing the body () into a corresponding tapping in an engine (), as well as a gripping zone (), generally of cylindrical form with a hexagonal section, enabling gripping of the body () for screwing the glow plug () into the corresponding tapping. The outer diameter of the portion of the body between the thread () and the gripping zone () is throughout its entire height of a diameter at least equal to the outer diameter of the threaded portion (). Application to internal combustion engines, in particular Diesel type engines.

Body of a glow plug provided with a pressure sensor

A glow plug (), includes a pressure sensor (), suitable for measuring the internal pressure of a motor cylinder in which the plug () is housed, a body () to be secured to the motor and a finger () in which a heater electrode is housed. The sensor () is firmly secured to the body () by the upper face thereof and rests on the finger (), so that the pressure exerted on the finger () presses the sensor against the body ().

Glow plug comprising a pressure sensor and motor equipped therewith

An application-specific integrated circuit includes a first analog stage having a first filtering means responsible for carrying out a filtering of the high-pass type on an input signal so as to deliver an intermediate signal, and a second digital stage having a second filtering means capable of introducing various first time constants depending on combinations of coefficient values and responsible for correcting any distortion potentially present in the intermediate signal, wherein the first filtering means includes an assembly of electronic components configured in parallel and/or in series and capable of introducing various second time constants depending on their combination.

Growing community of inventors

Merville, France

Alain Ramond