Honda Giken Kogyo Kabushiki Kaisha

Toshikazu Hiasa

Ikuo Oike

Hiroyuki Uchida

An exhaust controller for a spark ignition type two stroke internal combustion engine capable of adjusting an exhaust timing by an exhaust control valve, characterized by sufficiently cooling an outer peripheral wall of an exhaust passage. In a spark ignition type two stroke internal combustion engine, a cylinder head side outer peripheral portion of an upstream portion of an exhaust passage smoothly connected to an exhaust port is formed of an exhaust passage forming portion of a lid member closing an exhaust control valve. A crank case side outer peripheral portion of the exhaust passage is formed of a cylinder block. The cylinder head side outer peripheral portion of the exhaust passage is cooled by a cooling water passage near a cylinder head which is formed in the lid member and the crank case side outer peripheral portion of the exhaust passage is directly cooled by a cylinder block cooling water passage near a crank case which is formed in the cylinder block.

Exhaust controller for spark ignition type two stroke internal

A two-cycle engine includes a pair of first and second valves movable into and out of respective closed positions where the first and second valves close part of an exhaust port to vary an exhaust timing thereof. Power transmission means includes a pair of first and second shafts angularly movable about their respective axes disposed parallel to an axis of a cylinder and each having a pinion portion. A rack rod is movable along an axis thereof perpendicular to the axis of the cylinder, the rack rod having first and second rack portions meshingly engaging the pinion portions of the first and second shafts, respectively, in such a manner that the angular movement of the first shaft causes the angular movement of the second shaft through the rack rod. A pair of first and second levers of a generally L-shape defined by a pair of perpendicularly-disposed first and second arms has a corner portion where the first and second arms merge. Each lever is angularly movable about an axis passing through the corner portion and disposed parallel to the shafts. The first and second arms of each lever is engaged respectively with a respective one of the first and second valves and a respective one of the first and second shafts in such a manner that the angular movements of the first and second shafts cause the angular movements of the first and second levers, respectively, to move the first and second valves into and out of their closed positions.

Two-cycle engine

In a vehicle in which the power of a power plant carried on a body frame is transmitted to a driving wheel through a wrapping transmission mechanism, a pivot shaft is extended laterally of a vehicle body and secured fixedly to a body frame, the pivot ends of the swing arm for journaling the driving wheel is pivoted to the pivot shaft, the hanger portion of the power plant is also pivoted to the pivot shaft, the output shaft of the power plant being provided concentrically on the pivot shaft relatively rotatably, to which output shaft is secured a drive wheel of a wrapping transmission mechanism.

Growing community of inventors

Saitama, Japan

Toshikazu Hiasa