Honda Giken Kogyo Kabushiki Kaisha

Honda Giken Kabushiki Kaisha

Masafumi Araki

Yasuo Ikenoya

Shuso Ueda

Shizuo Yagi

Makoto Hirano

Junji Otani

Tomomi Nakaya

Masayuki Ota

Akira Amano

Tsuyoshi Kawabata

Yasushi Suganuma

Hiroaki Shinoki

Junji Ootani

Gunji Saitoh

Fumihiko Yoshida

Shinjirou Konno

Yasunori Sakamoto

Yozi Shimizu

A riding lawn mower comprises a frame supported by wheels, a mower housing carried at the underside of the frame, a plurality of cutter blades located within the mower housing to cut grass, a collection bag mounted on the rear of the frame, a discharge chute extending between the mower housing and the collection bag and defining a clipping path from the cutter blades into the collection bag, a blower including an impeller housing attached to the mower housing and an impeller located within the impeller housing and cooperating with the butter blades to convey the grass clippings into the collection bag through the discharge chute. A short conduit connects the impeller housing to the upstream end of the discharge chute to conduct an air generated by the impeller into the discharge chute. A central axis of the conduit is offset downwardly from a central axis of the discharge chute.

Lawn mower with blower

An improved exhaust gas cleaning system for a multi-cylinder internal combustion engine having an exhaust system with exhaust ports opening into a plurality of combustion chambers. A secondary air supplying system is in communication with the exhaust system for supplying secondary air to the exhaust system. A plurality of reed valve devices are interposed in the secondary air supplying system and are operated to open and close in response to pulsations of exhaust gas developed in the exhaust system during engine operation for controlling supply of secondary air to the respective exhaust ports independently of each other.

Exhaust gas cleaning system for multi-cylinder internal combustion

A combustion chamber system of a kerosine internal combustion engine including a main combustion chamber and an auxiliary combustion chamber both of which are defined in a cylinder head and are spaced from each other by a partition. A plurality of communication holes through which these main and auxiliary combustion chambers communicate with each other are made in the partition. The main combustion chamber has a suction port and an exhaust port opened thereto which are adapted to be opened and closed by a suction valve and an exhaust valve, respectively. The open ends of the communication holes on the side of the main combustion chamber are pointed to the upper surface of a piston located in the vicinity of a top dead center thereof, and a mixture of a theoretical or richer fuel ratio is fed into the main combustion chamber.

Combustion chamber system for kerosine internal combustion engine

An improved internal combustion engine for use with motorcycles including an intake system, an exhaust system, a starting aid such as a choke valve in the intake system for expediting the engine starting, and an exhaust gas cleaning device adapted to supply secondary air to the exhaust system for cleaning the exhaust gas flowing therethrough. The exhaust gas cleaning device comprises a secondary-air supply passage communicated with the exhaust system, a secondary-air control valve gear disposed in the intermediate part of the secondary-air supply passage and adapted to regulate the flow rate of the secondary air flowing through the supply passage, and a controller connected to the valve gear and adapted to close the same on detecting the operation of the starting aid and a vehicle speed below a set value.

Exhaust gas cleaning device for internal combustion engine of motorcycle

Herein disclosed is an exhaust gas recirculation system for an internal combustion engine, in which system communication is provided between an exhaust passage and an intake passage by way of an exhaust gas recirculation passage so that the exhaust gas in the exhaust passage is partially recirculated into the intake passage by the intake vacuum prevailing in the intake passage. The exhaust gas recirculation system is constructed to include: a vacuum-operated type exhaust gas recirculation valve disposed midway of the exhaust gas recirculation passage for regulating and controlling the flow rate of the exhaust gas to flow in said exhaust gas recirculation passage; a vacuum supply passage for providing communication of a vacuum chamber of the exhaust gas recirculation valve with the intake passage downstream of a throttle valve; a vacuum control valve connected with the vacuum supply passage for controlling the vacuum force of intake air to flow in the vacuum supply passage; and an interlocking mechanism for interlocking the vacuum control valve and the throttle valve. As a result, the exhaust gas recirculation control can be properly conducted, and a rider is enabled to do his throttling operation smoothly and lightly.

Exhaust gas recirculation system

An improvement of an exhaust gas cleaning system for an internal combustion engine which is provided with a secondary air feed system connected to an exhaust port and a reed valve device opened on an exhaust pulsation pressure arising in the exhaust port to feed secondary air to the exhaust port. The secondry air feed system has an upstream side secondary air passage through to the atmosphere and a downstream side secondary air passage formed on a thick wall zone of the internal combustion engine proper and connected through to the exhaust port. The reed valve device has a valve casing installed on the circumference of the engine proper, an inflow port connected to the upstream side secondary air passage, and an efflux port connected to the downstream side secondary air passage. The valve casing is partitioned internally into an upstream chamber provided adjacently to the engine proper and a downstream chamber provided on a side away from the engine proper across the upstream chamber. A reed valve body to allow a secondary air to flow from the upstream chamber to the downstream the chamber is arranged between the chambers.

Exhaust gas cleaning system for internal combustion engines

A motorcycle having an internal combustion engine mounted on a main frame and including suction and exhaust systems, an exhaust gas cleaning means adapted to supply secondary air to the exhaust system for cleaning an exhaust gas flowing therethrough, a carburetor provided in the suction system and provided with a throttle valve therein, and a throttle opener provided on the carburetor and adapted to open the throttle valve slightly while the internal combustion engine is decelerated. A secondary air supply passage is connected to the exhaust system, and a flow rate of the secondary air flowing through the passage is controlled by a secondary air control valve. When a vehicle speed of the motorcycle has decreased to a level not higher than a predetermined level, the secondary air control valve is closed to stop supplying the secondary air to the exhaust system, and the operation of the throttle opener is rendered ineffective simultaneously. This prevents the temperature of the exhaust gas from increasing. Accordingly, a change in the color, and the discoloring, of an outer surface of the exhaust system can be prevented. Also, a decrease in the effect of engine brake can be prevented effectively.

Growing community of inventors

Kawagoe, Japan

Masafumi Araki