Federal-mogul Ignition Srl

Continental Automotive France

Federal-mogul Italy Srl

Siemens Vdo Automotive Corporation

Sandro Goretti

John Antony Burrows

Alain Ramond

Cyrille Patri

Bernd Last

Michel Boucard

Stefano Vignoli

Simone Girlando

Ilaria Selmi

Laura Beretta

Roberto Rossi

Marcello Cino

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

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 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

A glow plug assembly () has a metallic heater probe () supported within a metal shell (). A transition zone () at the base of the shell () includes a membrane () and a tube portion (). A first open end () of the heater probe () is formed with a reduced diameter pilot section () that mates with the tube portion () to establish a joint area between the components. The membrane () may be made elastically deflectable so as to accommodate integration of a pressure sensor () in the glow plug assembly ().

Glow plug with metallic heater probe

A glow plug assembly includes an integrated, internal pressure sensor. In order to reduce loading on the center electrode, improve sensor responsiveness, and provide better thermal performance, the pressure sensor assembly is housed in a canister which forms a containment capsule and rigidly connects inside the glow plug shell near its seat area. The pressure sensor makes direct contact with the base end of the heater probe so that movements of the heater probe caused by fluctuations in gas pressure lead directly to changing force on the sensor stack.

Glow plug with pressure sensing canister

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

The invention relates to a device which is used as a force-transmitting device (') for a pressure sensor () associated with a glow plug in an internal combustion engine and is embodied in the form of a tubular piece whose cross-section is substantially annular. The inventive device comprises an area () on which the external diameter thereof increases towards one end thereof. The front surface of the device corresponding to said flared end is embodied in the form of a bearing face receiving the piezo-electric pressure sensor. A glow plug integrating said force-transmitting device is also disclosed.

Device for acting upon a pressure sensor mounted on a flow plug

A glow plug ( ) for diesel engines that includes a threaded metal tubular body ( ) and a metal sheath ( ) carried by the tubular body. The sheath ( ) has an end portion ( ) projecting from the tubular body ( ) and is electrically insulated from the tubular body. The glow plug ( ) includes first and second electrical terminals ( ) and a heating resistor ( ) electrically connected to the first terminal ( ) and to the end portion ( ) of the sheath ( ). The first terminal ( ) has the shape of a metal rod extending through the tubular body ( ) and has an end inserted inside the sheath ( ). The heating resistor ( ) is also set inside the sheath ( ). The second terminal ( ) is electrically connected to the sheath ( ) and can be disposed either coaxially around the first terminal ( ) or coaxially within the first terminal.

Glow plug arranged for measuring the ionization current of an engine

A glow plug ( ) that includes a metal tubular body ( ), a metal sheath ( ) carried by the tubular body, a heating resistor ( ) located inside the sheath, first and second electrical terminals ( ), and a layer ( ) of insulating material applied on a portion of the outer surface of the sheath. The first terminal ( ) is electrically connected to the heating resistor ( ) and the second terminal ( ) is electrically connected to the sheath ( ). The layer ( ) of insulating material is located on the sheath ( ) between the sheath and tubular body ( ) to thereby electrically insulate the metal sheath from the metal tubular body. The layer ( ) of insulating material can be applied by plasma deposition which enables the sheath ( ) to be attached to the tubular body ( ) by an interference fit of the sheath within a cavity ( ) in the tubular portion. Also disclosed is a method of fabricating the glow plug ( ).

Glow plug arranged for measuring the ionization current of an engine, and method for manufacturing the same

A glow plug for internal-combustion engines, comprising: a metal body ( ); a metal sheath ( ) having one closed end ( ) and one open end ( ); a terminal ( ) extending through the open end ( ) of the sheath ( ); a conductive powder ( ) set in electrical connection with one end ( ) of the terminal ( ) and with the sheath ( ); and a layer ( ) of insulating powder set between the aforesaid conductive powder ( ) and the sheath ( ) in an area between the closed end ( ) of the sheath ( ) and the end ( ) of the terminal ( ).

Growing community of inventors

Rubiera, Italy

Sandro Goretti