Honda Motor Co., Ltd.

Yusuke Ninomiya

Yuji Oigawa

Tetsuya Ogawa

Tetsuo Iida

Nobuyuki Hirose

Manabu Hashimoto

Chisako Takahashi

Takanori Sato

Manabu Dobashi

Shigekazu Sakata

Hibiki Koga

Yuko Akamine

Shota Gomibuchi

Mai Ohba

Hiroki Muta

Shohma Higano

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. The working member includes an arm portion that extends along the end wall portion and is coupled with the opening/closing member at one end by sandwiching the end wall portion therebetween, and a holding portion that is provided at the other end of the arm portion, the intake member has a guide hole into which the arm portion is inserted to guide movement of the arm portion, the guide hole has a first fixing portion that fixes the arm portion on one side in a movement direction of the arm portion, and a second fixing portion that fixes the arm portion on the other side in the movement direction of the arm portion, and widths of the first fixing portion and the second fixing portion of the guide hole are respectively equal to or less than a width of the arm portion.

Mechanism for opening/closing intake member

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.

Opening/closing mechanism of intake member

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 enginecomprises a shroudcovering an engine main body. The shroudincludes: a top coverarranged in an upper section of the general purpose engine; and a bottom coverarranged in a lower section of the general purpose engine. The top coverhas a pair of bridgesformed so as to protrude from the upper surface of the top cover, constituting the apex of the top coverand continually extending from the front surface of the top coverto the rear surface thereof, across the upper surface.

General purpose engine

Provided is a general purpose engine having a sufficient cooling function. The general purpose enginecomprises: an engine main bodyhaving a canister muffleron the side thereof; a cooling mechanismthat cools the engine main body; and a shroudcovering the engine main bodyand the cooling mechanism. The cooling mechanismcomprises: a cooling fanthat generates cooling air by rotating; and a blowing unitthat blows cooling air generated by the rotation of the cooling fan, towards the upper section of the engine main body. A space S in which the cooling air blown from the blowing unittowards the upper section of the engine main bodycan flow vertically downwards is formed between the shroudand the canister muffler. A return sectionthat guides the cooling air towards a stud boltthat fixes the canister mufflerto the engine main bodyis formed on an inside wall surface of the shroudforming the space S.

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 units and to transmit the information of a control map received from the second internal combustion engine unit to the first internal combustion engine unit using the second communicator.

Internal combustion engine management system, server device, and internal combustion engine management method

An internal combustion engine () having a cylinder () having a rearwardly slanted axial line is provided with a plurality of cylindrical cyclone dust collection units () commonly connected to an upstream end of a filter dust collection unit (). Each cyclone dust collection unit includes a main body () internally defining a separation chamber (C), and having an air inlet () communicating with outside and an air outlet () communicating with the filter dust collection unit, and the separation chamber is provided with a dust ejection hole (D) 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.

Internal combustion engine having air cleaner

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.

Internal combustion engine equipped with decompression mechanism

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.

Engine equipped with secondary air supply device

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.

A walk-behind lawnmower is provided with a height-adjusting mechanism for adjusting the height of a housing above the ground. The walk-behind lawnmower further comprises an operating button for switching an adjustment operation of the height-adjusting mechanism from a restricted state to a permissive state; and a height-adjusting grip capable of being grasped by a hand so as to raise or lower the housing when the operating button is operated, and the adjustment operation of the height-adjusting mechanism is thereby permitted. The height-adjusting grip is provided to the housing in the vicinity of a left or right lateral part. The operating button is positioned in an area allowing operation by a finger of the hand grasping the height-adjusting grip.

Walk-behind lawnmower

A walk-behind lawnmower having a height adjusting mechanism for adjusting the height of a housing above the ground. The height adjusting mechanism includes: a front wheel supporting member and a rear wheel supporting member that are attached to the housing so as to be capable of swinging up and down; a linking member for linking the front and rear wheel supporting members so as to be capable of concerted motion; and a locking mechanism for restricting and releasing displacement of the linking member in the forward-and-backward direction. The locking mechanism includes: a plurality of locking grooves arranged in a row from front to rear on the linking member; a locking pin capable of selectively interlocking with one of the locking grooves; a pin-guiding part for guiding the locking pin to be capable of entering into and retracting from one of the locking grooves; and an operating member for sliding and operating the locking pin.

Growing community of inventors

Wako, Japan

Yusuke Ninomiya