Aisan Kogyo Kabushiki Kaisha

Other

Yamaha Marine Kabushiki Kaisha

Mikio Hamada

Satomi Wada

Hiroyuki Nunome

Chitoshi Saito

Nobuo Suzuki

Tadao Horiuchi

Takahiro Aki

Yasuaki Kyokane

Akihiro Hanai

An outboard motor fuel vapor separator-venting system that vents fuel vapor from a fuel vapor separator through a vapor relief valve. The vapor relief valve allows vapor to gradually be delivered from the vapor separator to an air induction system depending on the amount of air entering the air induction system and/or engine speed. The vapor relief valve does not allow fuel vapor to vent from the fuel vapor separator to the air induction system when the engine is not operating.

Fuel supply system for outboard motor

With a low-pressure pump, fuel is supplied to a vapor separator comprising an air discharge port and a ball valve for closing the air discharge port in association with a rise in fluid level of the fuel supplied to the vapor separator. When the fuel is filled into the vapor separator entirely, the ball valve acts to tightly close the vapor separator, thereby pressurizing the fuel in the vapor separator.

Fuel supply apparatus and vapor separator in outboard engine

A fuel supply apparatus is adapted to control a pump which discharges fuel from a tank to a fuel passage, thereby regulating the pressure of fuel to be supplied to an engine. The tank includes a plurality of storage chambers, in a specific one of which the pump is placed. A part of the fuel discharged to the fuel passage is returned to the specific storage chamber through a branch passage. A storage chamber other than the specific storage chamber is in communication with the branch passage through a communication passage. A jet pump is operated to transfer the fuel from the storage chamber other than the specific storage chamber to the specific storage chamber through the communication passage by the action of the fuel flowing through the branch passage. An electronic control unit (ECU) controls an electromagnetic valve disposed in the branch passage to regulate the quantity of return flow, thereby delivering the fuel in a quantity corresponding to a consumption quantity of fuel to be sequentially consumed in the engine, to the engine through the communication passage.

Fuel supply apparatus for engines

A fuel injection control apparatus for engines used in vehicles, particularly, a golf-cart is disclosed. An engine is operated by means of an accelerator pedal and is assisted with its startup by a starter . An injector is controlled to inject fuel pumped by a fuel pump into an air-intake passage . A controller controls the starter , the injector , and the fuel pump , and others. Upon depression of the accelerator pedal to start up the engine , the controller actuates the starter and simultaneously actuates the injector only one time for initial injection. Specifically, the controller controls such that the initial injection and the ignition associated therewith are performed even if no pulse signal is input from a crank angle sensor

Fuel injection control apparatus for engines

A fuel supply apparatus for engines of a multi-point injection system using fuel tanks of many sizes and shapes is disclosed. In the fuel supply apparatus, a pump device,is constructed of an electric motor-driven fuel pump,, a fuel filter,, and a pressure regulator,, which are contained in a housing integrally constructed of a first and second cases,and,. A suction port,of the pump device,communicates with a suction opening,of the fuel pump,, while a discharge outlet portion,of the pump device,communicates with a discharge port,through the fuel filter,. The discharge port,communicates with an inlet of the pressure regulator,. An outlet of the pressure regulator,communicates with a return port,of the pump device

Fuel supply apparatus

In an ignition device for an engine,a spark plug,is operated to emit sparks with respect to the fuel-air mixture, so that the fuel-air mixture is ignited. A protrusion,provided on a flywheel,mounted on a crankshaft,is revolved with the rotation of the crankshaft,A magnet pickup,detects the passage of the protrusion,When the protrusion,passes near the magnet pickup,the magnet pickup,outputs a detection signal, in a pulse manner, having a peak value in response to the passing speed of the protrusion. When the detection signal outputted from the magnet pickup,exceeds a predetermined threshold value, the electronic control unit (ECU),operates to activate the spark plug,through an ignition coil,so that the ignition timing is advanced or delayed in accordance with the difference in rotational speed of the shaft,, i.e., of the engine

Engine ignition device

In a fuel pump control apparatus provided by the present invention, if a target fuel pressure is changed, processing is carried out to determine whether the target fuel pressure has been increased or decreased so that proper transient state control can be executed. If the target fuel pressure has been increased, a fuel pump is driven by a maximum driving signal till the pressure of fuel reaches 90% of a new higher target fuel pressure. If the target fuel pressure has been decreased, on the other hand, the fuel pump is driven by a minimum driving signal till the pressure of fuel reaches 110% of a new lower target fuel pressure. In either case, transition state control is executed thereafter to drive the fuel pump at a duty ratio determined on the basis of an injection flow rate and the target fuel pressure till a predetermined delay time lapses. After the transition state control is finished, a steady state control is restored. In the steady state control, the duty ratio is determined on the basis of the pressure of the supplied fuel and the target fuel pressure. As a result, the fuel pump control apparatus provided by the present invention is capable of well keeping up with a change in supplied fuel pressure required by the internal combustion engine while allowing the cost and the size thereof to be reduced.

Growing community of inventors

Obu, Japan

Mikio Hamada