An exhaust gas purifying device for an engine comprises a catalyst arranged in the exhaust passage for purifying the exhaust gas, the catalyst having an oxidizing ability. An amount of sulfate adsorbed in the catalyst is obtained. When the adsorbed sulfate amount becomes larger than a predetermined amount, a reducing agent is fed to the catalyst temporarily to desorb the adsorbed sulfate from the catalyst and reduce the sulfate. At this time, the amount of the reducing agent is set to make the air-fuel ratio of the exhaust gas flowing into the catalyst rich.

Exhaust gas purifying device for engine

An object of the invention is to provide an exhaust emission control device which eliminates the use of a heat-retention structure using heat-insulating material such as glass wool so as to attain substantial lessening in production cost. A discharge end of a gas gathering chamber is connected to an entry end of a mixing pipe so as to encase the entry end of the mixing pipe and close an opened end face in a required spaced-apart relationship. Moreover, a side surface of the entry end of the mixing pipe adjacent to the discharge side of the particulate filter is formed with an opening; and gas guide passages are formed in the gas gathering chamber by guide fins for tangential introduction of all of the exhaust gas from the discharge side of the particulate filter to the opening. An extra space isolated from the gas guide passages is ensured in the gas gathering chamber as a heat-retention chamber surrounding the entry end of the mixing pipe.

Exhaust emission control device

A scooter type vehicle comprises: a unit swing type engine provided with an engine body having a cylinder assembly forward inclined in a horizontal direction and having a central axis arranged along a longitudinal direction of a vehicle body and a transmission case rearward extending from one side of the engine body and supporting a rear wheel to a rear end thereof, swingably pivoted to a vehicle body frame and flexibly supported to a vehicle body frame through a cushion unit; a fuel injection type intake apparatus comprising a throttle body connected to an intake port of the cylinder assembly, an air cleaner connected to the throttle body, fuel injecting means and a controller for controlling a fuel injection amount; and an article accommodation box arranged above the unit swing type engine. In such scooter type vehicle, a bottom surface of the accommodation box (7) is formed in an obliquely forward descending manner so as to be substantially parallel to a line (X-X, X'-X') connecting the highest position of the unit swing type engine (10) in a state that the cushion unit (15) is most compressed and the highest position of the fuel injecting means (50) or the air cleaner (48), and the controller (58) is arranged in adjacent to a fuel tank (9) arranged in the longitudinal direction of the vehicle body in the accommodation box (7).

Scooter type vehicle

An engine control device can include a throttle valve for adjusting an amount of air supplied to an engine, operation amount detecting sensors for detecting an operation amount of a throttle lever, a motor for driving the throttle valve between open and closed positions according to detection values of the operation amount detecting sensor 21 a or the like, and throttle opening detecting sensors for detecting an opening of the throttle valve is provided with a limp-home mechanism for keeping the throttle valve in a mechanically neutral position when an abnormality occurs When the throttle valve is in the mechanically neutral position, an ignition timing control can be switched in a stepwise manner over a predetermined time period from a regular ignition timing control to a limp-home ignition timing control

Engine control device

A service vehicle (6) for performing in-space operations on a selected target spacecraft (2), shall be provided such that a particularly versatile and flexible service for performing in-space operations on the target spacecraft (2) is possible. Furthermore, a servicing system (1) and a method for in-space servicing of spacecraft (2) shall be provided. With this object, according to the invention the service vehicle (6) comprises a communication module (60) which with respect to its transmission characteristics is configurable in order to meet given receiver parameters of said selected target spacecraft (2). Furthermore, according to the present invention the selected target spacecraft (2) is used to relay transmitted signals or information from the service vehicle (6) to a ground control module (12).

Service vehicle for performing in-space operations on a target spacecraft, servicing system and method for using a service vehicle

A watercraft includes an improved engine control system that enhances the responsiveness of the watercraft and eases watercraft operation. The watercraft includes a propulsion device, such as a jet propulsion unit, and an engine that powers the propulsion device. The engine control system is configured to maintain or increase engine speed under certain operating conditions.

Engine output control for watercraft

An exhaust system for a motorcycle that includes an exhaust sensor that extends into the exhaust system at a low point in the motorcycle. A plurality of baffles are positioned around the exhaust sensor so as to protect its extending portion from damage from foreign objects.

Device for protecting oxygen sensor of motorcycle

A motorcycle having an exhaust system with a sensor in the exhaust system for engine control. The sensor is located so that it will be protected by the exhaust device into which it protrudes and by other portions of the motorcycle. The exhaust system includes a plurality of exhaust pipes and the exhaust device and one of these exhaust pipes is readily removable from a unitary assembly comprised of the remaining exhaust pipes and exhaust device so that an adjacent component of the motorcycle can be easily serviced.

Oxygen sensor layout

A water cooled motorcycle wherein a curved radiator is disposed behind the steering shaft and inclined substantially at the same angle as the steering shaft so as to provide adequate air flow through the radiator without the engine heat being transmitted from the external portion of the engine to the radiator. Other embodiments disclose the use of lower radiators and series or parallel flow paths between the upper and lower radiators.

Radiator and mounting arrangement for a motorcycle

A small watercraft with an emergency shut-off system is provided. The emergency shut-off system is configured to shut off the engine of the small watercraft when the small watercraft is overturned. The emergency shut-off system comprises an electronic control unit that is operatively coupled to an overturn sensor and the engine. The electronic control unit is configured to sense a signal generated by the overturn switch. The electronic control unit is also configured to determine if the signal generated by the overturn switch continues for a period longer than a preset amount of time and to shut off the engine if the signal generated by the overturn switch continues beyond the preset amount of time.

Masaki Takegami

Papers

Engine output control for watercraft

Device for protecting oxygen sensor of motorcycle

Oxygen sensor layout

Radiator and mounting arrangement for a motorcycle

Control system for small watercraft