Abstract: The present invention provides spark plug that can improve detection accuracy of pre-ignition caused by flame kernel occurring inside spark plug. Terminal is located at a rear end side with respect to thread portion of metal shell. Detector electrode is provided at a portion located at a top end side with respect to a top end of contact portion between reduced diameter portion and shelf portion or packing in a space formed between outer periphery of insulator and inner periphery of the metal shell. The detector electrode and the terminal are connected by conductor. The detector electrode and the conductor are insulated from center electrode, the metal shell and ground electrode. Since the detector electrode is located in the space between the outer periphery of the insulator and the inner periphery of the metal shell, an early detection of the flame kernel occurring in this space can be possible.

Abstract: The present invention provides spark plug that can improve detection accuracy of pre-ignition caused by flame kernel occurring inside spark plug. Terminal is located at a rear end side with respect to thread portion of metal shell. Detector electrode is provided at a portion located at a top end side with respect to a top end of contact portion between reduced diameter portion and shelf portion or packing in a space formed between outer periphery of insulator and inner periphery of the metal shell. The detector electrode and the terminal are connected by conductor. The detector electrode and the conductor are insulated from center electrode, the metal shell and ground electrode. Since the detector electrode is located in the space between the outer periphery of the insulator and the inner periphery of the metal shell, an early detection of the flame kernel occurring in this space can be possible.

Abstract: A vehicle fog lamp includes a light source and reflective surface sections surrounding the light source. A screen light distribution pattern formed by illuminating light that is emitted from the light source and is reflected on the reflective surface section is divided into an outer pattern part and an inner pattern part. An upper end part of the outer pattern part is disposed above an upper end part of the inner pattern part.

Abstract: A sparkplug includes an insulator having an axial hole, a center electrode of which a front end is placed further forwards than a front end of the insulator, and a shell. The center electrode has a shoulder portion and a main body portion and is made up of an outer layer and an inner layer. A front end face, which is connected to an outer circumferential surface of the insulator and the axial hole and slopes towards the rear end side, is formed at a front end portion of the insulator, and the front end of the insulator is placed further forwards than a boundary between the shoulder portion and the main body portion. A front end portion of the inner layer is placed further forwards than the boundary between the shoulder portion and the main body portion.

Abstract: A sparkplug includes an insulator having an axial hole, a center electrode of which a front end is placed further forwards than a front end of the insulator, and a shell. The center electrode has a shoulder portion and a main body portion and is made up of an outer layer and an inner layer. A front end face, which is connected to an outer circumferential surface of the insulator and the axial hole and slopes towards the rear end side, is formed at a front end portion of the insulator, and the front end of the insulator is placed further forwards than a boundary between the shoulder portion and the main body portion. A front end portion of the inner layer is placed further forwards than the boundary between the shoulder portion and the main body portion.

Abstract: A spark plug comprising a cylindrical portion which projects into a combustion chamber from an inner wall face of an engine head when the spark plug is fixed to the engine head, wherein the cylindrical portion has one or more ventilating portion comprised of a through hole or a notch in an outer circumferential face thereof. An igniting portion projecting into the combustion chamber improves ignitability. Further, because an air-fuel mixture fed from an inlet of the internal combustion engine flows to inside of the cylindrical portion through the ventilating portion, heat of an insulator is taken away and cooled down, whereby an occurrence of pre-ignition is prevented.

Abstract: A spark plug comprising a cylindrical portion which projects into a combustion chamber from an inner wall face of an engine head when the spark plug is fixed to the engine head, wherein the cylindrical portion has one or more ventilating portion comprised of a through hole or a notch in an outer circumferential face thereof. An igniting portion projecting into the combustion chamber improves ignitability. Further, because an air-fuel mixture fed from an inlet of the internal combustion engine flows to inside of the cylindrical portion through the ventilating portion, heat of an insulator is taken away and cooled down, whereby an occurrence of pre-ignition is prevented.

Abstract: An apparatus for separating suspended solids from a liquid includes a tank, a floating bed of granular filter material held at the upper portion of the tank at the time of filtration, a feed pipe for feeding the liquid at a position between a filtering section and a sedimenting section, a hollow member or members which are arranged within the tank at a position below the position of the filter bed but above the position of the feed pipe, an air supply pipe which blows air up through the hollow member or members, thereby creating a turbulence required for effective backwashing, an arrangement for bringing the filter bed down to a position where the lowermost surface of the filter bed is held below a position substantially flush with the top end of the hollow member or members, a means for discharging a filtrate from the tank which is arranged in the top portion thereof, and a means for discharging a deposit of the suspended solids from the tank, which is equipped at the bottom portion thereof.