Ignition device for rotary piston engine
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorsKouichi Mori, Toshihiko Igashira, Shunzo Yamaguchi
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Abstract
An ignition device for a rotary piston engine includes a glow plug which is mounted at an ignition port formed in an engine housing to communicate with a combustion and operation chamber and which, when electrically powered, is heated to red hot to ignite an air-fuel mixture in the combustion and operation chamber. The glow plug ignites the air-fuel mixture through a communicating port which is formed to face the combustion and operation chamber and which has a smaller aperture area than the cross-section area of the ignition port.
Claims8
An ignition device for a rotary piston engine having a rotor for defining a combustion and operation chamber with an engine housing and an attachment mounting bore formed in said engine housing to communicate with said operation chamber, comprising:
- a glow plug for igniting air-fuel mixture in said operation chamber;
- and
- an attachment means detachably mounted in said mounting bore, that end of said attachment means which is farther from said operation chamber having a mounting portion to mount said glow plug thereon, that side of said attachment means which faces said operation chamber having a cavity for defining an ignition port for said glow plug, that end of said attachment means which faces said operation chamber having a communicating port having a smaller aperture area than a cross-sectional area of said ignition port a longitudinal axis of said attachment means being on a plane perpendicular to an axis of rotation of said rotor, and also being slanted to a normal line drawn at the position of opening to an inner wall of said engine housing, toward the direction of rotation of said rotor;
- whereby said glow plug ignites said air-fuel mixture through said communicating port.
In an ignition device for a rotary piston engine comprising a plug mounting bore formed in an engine housing which defines a combustion and operation chamber of the engine with a rotor thereof, said plug mounting bore communicating with said operation chamber, and a glow plug mounted in said plug mounting bore, said glow plug being adapted to be red-heated, when it is electrically powered, to ignite an air-fuel mixture in said operation chamber,
- the improvement comprising:
- means for defining an ignition port within said plug mounting bore and defining a communicating port in facing relation to said operation chamber, said communicating port having a smaller aperture area than a cross-sectional area of said ignition port, a longitudinal axis of said glow plug being on a plane perpendicular to an axis of rotation of said rotor, and also being slanted to a normal line drawn at the position of opening to an inner wall of said engine housing, toward the direction of rotation of said rotor;
- whereby said glow plug ignites the air-fuel mixture in said operation chamber through said communicating port.
Dependencies are inferred from the claim text.