Sanshin Kogyo Kabushiki Kaisha

Yamaha Hatsudoki Kabushiki Kaisha

Other

Yamaha Marine Kabushiki Kaisha

Yukio Matsushita

Masashi Yamaguchi

Hirotaka Kaji

Kimihiro Nonaka

Hiroshi Harada

Noboru Kobayashi

Tomio Iwai

Takao Kawai

Yoshihiro Gohara

Kenichi Handa

Takehisa Suzuki

Hiroshi Tomita

Toshikatsu Nozaki

A parent-child type boat having an electric power generating device, such as a fuel cell. The boat includes a parent boat and at least one child boat which is smaller than the parent boat. The parent boat is equipped with a generating device. The child boat is equipped with a battery and an electric propulsion device. When the child boat is docked with the parent boat and electrically connected thereto, power can be supplied to at least one of the battery and the electric propulsion device of the child boat from the generating device of the parent boat.

Parent-child type boat with generator

An electric propulsion unit can include a propeller for producing thrust, a motor for driving the propeller, and a fuel cell for supplying electric power to drive the motor. The fuel cell can include a fuel cell stack for generating power and a fuel tank for feeding fuel to the fuel cell stack.

Electric propulsion unit

The invention provides an optimization device for a unitary apparatus that can obtain optimum characteristics as a combined apparatus, without losing user's selectivity and unitary apparatus's versatility. The optimization device includes an optimization process section that optimizes dynamic characteristics of the unitary apparatus using genetic algorithms and fuzzy inference, with functional characteristics of a combined apparatus as evaluation reference.

Control system of optimizing the function of machine assembly using GA-Fuzzy inference

Real-time optimization is conducted for a control device having a fuzzy inference system that can optimize characteristics of the control device in real time, by coding parameters used in the fuzzy inference system into chromosomes, and optimizing in real time the output of the control device by subjecting the chromosomes to evolutionary computation. Coding is conducted by (i) revising a matrix of fuzzy rules used in the system by extracting a section from the matrix and coding elements of the section into chromosomes; (ii) modifying the configuration of the fuzzy rule matrix defined by membership functions by coding elements of the membership functions into chromosomes; or (iii) changing a level of an input of the parameters and a level of an output of the fuzzy inference system.

Method of real-time optimization of control device equipped with fuzzy inference system

The invention provides a pilot control device that enables optimum pilot depending on user's preference and use environment. The pilot control device includes a control module and an optimum process device, with regard to a watercraft having an apparatus affecting pilot control. The control module determines output regarding a manipulated variable of the device affecting pilot control based on predetermined input information. The optimum process device optimizes, in real time, the control module, with the characteristics of a watercraft as an evaluation subject.

Apparatus for controlling watercraft pilot control

This invention relates to an event timing apparatus for an internal combustion engine, and more particularly to an improved control arrangement for a fuel injection and ignition arrangement. In accordance with this invention, a timing detecting arrangement is disclosed having a timing correcting circuit for correcting deviations between the actual timing measurements made and the true, desired timing signal required for accurate operation of the fuel injection system. Thus, a fuel injection system and ignition system is provided that is able to provide accurate crank angle timing measurements with reference to which crank chamber pressure and other measurements may be made, in spite of possible manufacturing and/or assembling variations in the timing measuring means. The way in which the manufacturing or assembling of variations are measured is also disclosed.

Control device for internal combustion engine

This invention relates to a fuel injection apparatus for an internal combustion engine, and more particularly to an improved control arrangement for a fuel injection arrangement. In accordance with the invention, an arrangement is disclosed for determining the mass of air taken into the engine crankcase chamber by calculating an average intake air mass which is based not on pressure measurements taken upon each crankshaft rotation individually, but on the arithmetical mean of such pressure measurements taken during a plurality of crankshaft rotations. Thus, a fuel injection control system is achieved which senses differences in crankcase pressure and which eliminates the effects of abnormal changes in crankcase pressure due to effects other than the amount of air inducted.

Fuel injection system of internal combustion engine

A number of embodiments of combustion chamber configurations for internal combustion engines as applied as power units for outboard motors. In each embodiment, the combustion chamber comprises a main open volume in which combustion is initiated and into which fuel is discharged by a fuel injection nozzle. An energy cell, of smaller volume, is disposed so as to receive some of the fuel discharged by the injection nozzle and for creating combustion at the end of the combustion cycle to cause a pressure increase that discharges a hot charge into the main combustion volume for completing combustion. The energy cell is formed from a ceramic material. Both two and four-cycle applications and variations of combustion chamber configurations are disclosed.

Internal combustion engine

Several embodiments of fuel injection systems for internal combustion engines wherein certain components of the engine are lubricated directly by lubricant supplied by a lubricant pump and the lubricant pump also supplies lubricant to a fuel injection pump. In some embodiments, the fuel delivered to the injection pump is mixed with the fuel pumped by the injection pump for delivery to the engine through an injection nozzle.

Internal combustion engine provided with fuel injection device

Several embodiments of turbo-charged two cycle internal combustion engines utilized in combination with an outboard motor. In each embodiment, the exhaust system for the engine includes devices for insuring that sufficient backpressure is exerted at the exhaust port of one cylinder during the overlap period when its scavenge passages and exhaust ports are both open so as to preclude the discharge of fresh fuel/air mixture to the atmosphere without adversely affecting the turbo-charger performance. In some embodiments of the invention, a valve arrangement is controlled for controlling the proportion of the exhaust gases that flow across the turbo-charger so that at some running conditions, the turbo-charger receives all of the exhaust gases. In all embodiments, an expansion chamber device is incorporated in the drive shaft housing of the outboard motor and in some embodiments, the turbo-charger turbine inlet receives its gases from this expansion chamber.

Outboard motor with turbo-charger

Disclosed are several embodiments of a turbo-charged two cycle internal combustion engines utilized in combination with an outboard motor are disclosed. In each embodiment, the exhaust system for the engine includes devices for insuring that sufficient backpressure is exerted at the exhaust port of one cylinder during the overlap period when its scavenge passages and exhaust ports are both open so as to preclude the discharge of fresh fuel/air mixture to the atmosphere without adversely affecting the turbo-charger performance. In some embodiments of the invention, a valve arrangement is controlled for controlling the proportion of the exhaust gases that flow across the turbo-charger so that at some running conditions, the turbo-charger receives all of the exhaust gases. In all embodiments, an expansion chamber device is incorporated in the drive shaft housing of the outboard motor and in some embodiments, the turbo-charger turbine inlet receives its gases from this expansion chamber.

Several embodiments of fuel injection controls for two-cycle crankcase compression internal combustion engines. In each embodiment, the fuel injection is controlled by measuring the amount of air inducted through measurement of the pressure generated in the crankcase. In each embodiment, abnormal pressure variations in the crankcase not due to the amount of air inducted are eliminated by measuring the pressures at predetermined crankshaft angles. In some embodiments, this is done through the use of a valving arrangement and in other embodiments, this is done electronically.

Fuel injection system for two-cycle internal combustion engines

A fuel injection control method and system for a crankcase compression two cycle engine wherein the amount of fuel discharge is controlled by the pressure in the crankcase.

Fuel injection apparatus for an internal combustion engine

A two stroke engine has a pair of adjacent cylinders. The exhaust passage from one cylinder passes near the other cylinder. Localized distortion of the other cylinder is reduced or prevented by placing isolation, insulation, or cooling means in the region between the exhaust passage and the other cylinder.

Growing community of inventors

Iwata, Japan

Yukio Matsushita