Abstract: A virtual image display apparatus includes a housing having a first housing part and a second housing part. The first housing part is located on a side facing in a first direction. The second housing part is located on a side facing in a second direction being opposite to the first direction. A composite wall is located at the housing on a side facing in a third direction being perpendicular to the first direction. The composite wall includes a first front wall portion and a second front wall portion. The first front wall portion is extended from the first housing part. The second front wall portion is extended from the second housing part. The first and second front wall portions have an interference avoidance structure that avoids interference when the first and second front wall portions approach each other by receiving a load.

Abstract: There is provided a pit initiation evaluation system or the like capable of predicting pit initiation effectively and at low cost. In a pit initiation evaluation system of an embodiment, a pit initiation evaluation unit creates and retains, based on a dry-wet alternate time data, a deposit impurity concentration data, and a pit initiation data on pitting corrosion initiated in each of a plurality of turbine stages when an operation is actually performed in the steam turbine, a pit initiation evaluation table presenting a relationship between a dry-wet alternate time, a deposit impurity concentration, and pit initiation. Further, the pit initiation evaluation unit is configured to evaluate, by using the pit initiation evaluation table, pitting corrosion to be initiated in each of the plurality of turbine stages in an operation planned for the steam turbine.

Abstract: Provided is an opening/closing mechanism for an intake member which enables backlash suppression a working member and positioning of a choke lever. The opening/closing mechanism includes the intake member that accommodates a filter part and has an opening leading to a carburetor at an end wall portion facing the filter part; an opening/closing member that is disposed between the filter part and the end wall portion, and opens and closes the opening; and a working member that is disposed on a side opposite to the opening/closing member with the end wall portion interposed therebetween.

Abstract: An opening/closing mechanism of an intake member includes: an intake member that accommodates a filter part and has an opening leading to a carburetor in an end wall opposing the filter part; an opening/closing member disposed between the filter part and the end wall, and opens/closes the opening; and a working member disposed on an opposite side to the opening/closing member so as to interpose the end wall, and allows the opening/closing member to be operated. The working member includes: an arm part which extends along the end wall and is linked with the opening/closing member to interpose the end wall at one end part, and a holding part provided to another end part of the arm part. The intake member has a guide hole into which the arm part is inserted and guides movement of the arm part.

Abstract: Provided is a general purpose engine that has a small external appearance and can be placed in a stable posture even when inverted, and whereby labels attached to the upper surface thereof can be protected. The general purpose engine 1 comprises a shroud 4 covering an engine main body. The shroud 4 includes: a top cover 2 arranged in an upper section of the general purpose engine 1; and a bottom cover 3 arranged in a lower section of the general purpose engine 1. The top cover 2 has a pair of bridges 20, 20 formed so as to protrude from the upper surface of the top cover 2, constituting the apex of the top cover 2 and continually extending from the front surface of the top cover 2 to the rear surface thereof, across the upper surface.

Abstract: Provided is a general purpose engine having a sufficient cooling function. The general purpose engine 1 comprises: an engine main body 10 having a canister muffler 132 on the side thereof; a cooling mechanism 9 that cools the engine main body 10; and a shroud 4 covering the engine main body 10 and the cooling mechanism 9. The cooling mechanism 9 comprises: a cooling fan 90 that generates cooling air by rotating; and a blowing unit 92 that blows cooling air generated by the rotation of the cooling fan 90, towards the upper section of the engine main body 10. A space S in which the cooling air blown from the blowing unit 92 towards the upper section of the engine main body 10 can flow vertically downwards is formed between the shroud 4 and the canister muffler 132. A return section 40 that guides the cooling air towards a stud bolt 132a that fixes the canister muffler 132 to the engine main body 10 is formed on an inside wall surface of the shroud 4 forming the space S.

Abstract: An internal combustion engine management system includes: a plurality of internal combustion engine units of which each includes an internal combustion engine, a first communicator configured to communicate with a server device, and a communication controller configured to transmit at least estimation information out of the estimation information which is used to estimate an environment in which the internal combustion engine is placed and information of a control map which is used to control the internal combustion engine to the server device using the first communicator; and the server device that includes a second communicator configured to communicate with the first communicator, and a processor configured to extract a second internal combustion engine unit having transmitted estimation information which is similar to the estimation information received from a first internal combustion engine unit out of the plurality of internal combustion engine units from the plurality of internal combustion engine uni

Abstract: Provided is an opening/closing mechanism for an intake member which enables backlash suppression a working member and positioning of a choke lever. The opening/closing mechanism includes the intake member that accommodates a filter part and has an opening leading to a carburetor at an end wall portion facing the filter part; an opening/closing member that is disposed between the filter part and the end wall portion, and opens and closes the opening; and a working member that is disposed on a side opposite to the opening/closing member with the end wall portion interposed therebetween.

Abstract: An opening/closing mechanism of an intake member includes: an intake member that accommodates a filter part and has an opening leading to a carburetor in an end wall opposing the filter part; an opening/closing member disposed between the filter part and the end wall, and opens/closes the opening; and a working member disposed on an opposite side to the opening/closing member so as to interpose the end wall, and allows the opening/closing member to be operated. The working member includes: an arm part which extends along the end wall and is linked with the opening/closing member to interpose the end wall at one end part, and a holding part provided to another end part of the arm part. The intake member has a guide hole into which the arm part is inserted and guides movement of the arm part.

Abstract: Provided is a general purpose engine that has a small external appearance and can be placed in a stable posture even when inverted, and whereby labels attached to the upper surface thereof can be protected. The general purpose engine 1 comprises a shroud 4 covering an engine main body. The shroud 4 includes: a top cover 2 arranged in an upper section of the general purpose engine 1; and a bottom cover 3 arranged in a lower section of the general purpose engine 1. The top cover 2 has a pair of bridges 20, 20 formed so as to protrude from the upper surface of the top cover 2, constituting the apex of the top cover 2 and continually extending from the front surface of the top cover 2 to the rear surface thereof, across the upper surface.

Abstract: An internal combustion engine (1) having a cylinder (5) having a rearwardly slanted axial line is provided with a plurality of cylindrical cyclone dust collection units (34) commonly connected to an upstream end of a filter dust collection unit (35). Each cyclone dust collection unit includes a main body (44, 45) internally defining a separation chamber (45C), and having an air inlet (31) communicating with outside and an air outlet (73) communicating with the filter dust collection unit, and the separation chamber is provided with a dust ejection hole (45D) directed tangentially in an obliquely forward direction. Thereby, dust ejected from the dust ejection hole is ejected away from the operator of the engine, and is prevented from depositing on the engine.

Abstract: Provided is a general purpose engine having a sufficient cooling function. The general purpose engine 1 comprises: an engine main body 10 having a canister muffler 132 on the side thereof; a cooling mechanism 9 that cools the engine main body 10; and a shroud 4 covering the engine main body 10 and the cooling mechanism 9. The cooling mechanism 9 comprises: a cooling fan 90 that generates cooling air by rotating; and a blowing unit 92 that blows cooling air generated by the rotation of the cooling fan 90, towards the upper section of the engine main body 10. A space S in which the cooling air blown from the blowing unit 92 towards the upper section of the engine main body 10 can flow vertically downwards is formed between the shroud 4 and the canister muffler 132. A return section 40 that guides the cooling air towards a stud bolt 132a that fixes the canister muffler 132 to the engine main body 10 is formed on an inside wall surface of the shroud 4 forming the space S.

Abstract: An internal combustion engine management system includes: a plurality of internal combustion engine units of which each includes an internal combustion engine, a first communicator configured to communicate with a server device, and a communication controller configured to transmit at least estimation information out of the estimation information which is used to estimate an environment in which the internal combustion engine is placed and information of a control map which is used to control the internal combustion engine to the server device using the first communicator; and the server device that includes a second communicator configured to communicate with the first communicator, and a processor configured to extract a second internal combustion engine unit having transmitted estimation information which is similar to the estimation information received from a first internal combustion engine unit out of the plurality of internal combustion engine units from the plurality of internal combustion engine uni

Abstract: An internal combustion engine (1) having a cylinder (5) having a rearwardly slanted axial line is provided with a plurality of cylindrical cyclone dust collection units (34) commonly connected to an upstream end of a filter dust collection unit (35). Each cyclone dust collection unit includes a main body (44, 45) internally defining a separation chamber (45C), and having an air inlet (31) communicating with outside and an air outlet (73) communicating with the filter dust collection unit, and the separation chamber is provided with a dust ejection hole (45D) directed tangentially in an obliquely forward direction. Thereby, dust ejected from the dust ejection hole is ejected away from the operator of the engine, and is prevented from depositing on the engine.

Abstract: An internal combustion includes: a camshaft having a metal core rod insert formed centrally in the camshaft and a driven gear, an exhaust cam, etc. formed of resin integrally with the camshaft; and a decompression mechanism. The decompression mechanism includes: a pair of supporting protrusions provided on the driven gear and each having an insertion hole; a decompression member having a pair of projections disposed between the supporting protrusions; and a biasing spring disposed between the projections for normally biasing the decompression member toward the exhaust cam. The camshaft also has a guide recess and a balancing recess formed in opposite sides of the camshaft, and the metal core rod is exposed through the guide recess and the balancing recess.

Abstract: An engine equipped with a secondary air supply device includes: a fuel tank disposed over a cylinder head for storing fuel of the engine; an exhaust muffler disposed beneath the fuel tank and below the exhaust port in a region lateral of the cylinder head; an exhaust pipe connecting the exhaust port to the exhaust muffler; a secondary air introduction pipe connected to the exhaust pipe for introducing air into the exhaust muffler; and a tailpipe for discharging exhaust gas of the exhaust muffler to the outside, the exhaust muffler and the fuel tank defining therebetween a space, the tailpipe being disposed to meander in the space.

Abstract: An engine equipped with a secondary air supply device where a cylinder extends obliquely to define a space therebeneath, which includes: a cooling fan disposed laterally of the cylinder; a carburetor disposed closer to the space than the cooling fan; an exhaust muffler disposed opposite from the carburetor with the cylinder interposed therebetween and in communication with a cylinder head via an exhaust pipe; a secondary air introduction pipe connected to the exhaust pipe and extending from the exhaust pipe to the space so that its inlet end portion is located in the space; an intake nozzle provided in communication with the inlet end portion of the introduction pipe and having an opening portion that opens in an opposite direction from the cooling fan; and a partition wall disposed between the opening portion of the intake nozzle and the carburetor.

Abstract: An internal combustion includes: a camshaft having a metal core rod insert formed centrally in the camshaft and a driven gear, an exhaust cam, etc. formed of resin integrally with the camshaft; and a decompression mechanism. The decompression mechanism includes: a pair of supporting protrusions provided on the driven gear and each having an insertion hole; a decompression member having a pair of projections disposed between the supporting protrusions; and a biasing spring disposed between the projections for normally biasing the decompression member toward the exhaust cam. The camshaft also has a guide recess and a balancing recess formed in opposite sides of the camshaft, and the metal core rod is exposed through the guide recess and the balancing recess.

Abstract: An engine equipped with a secondary air supply device includes: a fuel tank disposed over a cylinder head for storing fuel of the engine; an exhaust muffler disposed beneath the fuel tank and below the exhaust port in a region lateral of the cylinder head; an exhaust pipe connecting the exhaust port to the exhaust muffler; a secondary air introduction pipe connected to the exhaust pipe for introducing air into the exhaust muffler; and a tailpipe for discharging exhaust gas of the exhaust muffler to the outside, the exhaust muffler and the fuel tank defining therebetween a space, the tailpipe being disposed to meander in the space.

Abstract: An engine equipped with a secondary air supply device where a cylinder extends obliquely to define a space therebeneath, which includes: a cooling fan disposed laterally of the cylinder; a carburetor disposed closer to the space than the cooling fan; an exhaust muffler disposed opposite from the carburetor with the cylinder interposed therebetween and in communication with a cylinder head via an exhaust pipe; a secondary air introduction pipe connected to the exhaust pipe and extending from the exhaust pipe to the space so that its inlet end portion is located in the space; an intake nozzle provided in communication with the inlet end portion of the introduction pipe and having an opening portion that opens in an opposite direction from the cooling fan; and a partition wall disposed between the opening portion of the intake nozzle and the carburetor.