Patent application number | Description | Published |
20090042458 | Multiple-Cylinder Engine for Planing Water Vehicle - A multiple-cylinder engine for a planing water vehicle includes an operation control device which changes the number of deactivated cylinders step by step in response to an engine speed when the engine speed exceeds a preset speed. The operation control device can have a plurality of cylinder deactivation order maps used for instructing an increment order of cylinders which are deactivated step by step when the engine speed exceeds the preset speed. The operation control device can exchange one of the cylinder deactivation order maps which is currently used for another one of the maps in accordance with an operation state of the engine. | 02-12-2009 |
20100210155 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes a hull, an engine disposed inside the hull, a jet propulsion device arranged to be driven by a driving force of the engine, a water detection unit arranged to detect whether or not the hull is immersed in water, and a control unit arranged to restrict an engine rotational speed. The jet propulsion device is arranged to jet water rearward from a jet port to thereby apply a propulsive force to the hull. The water detection unit includes a water detection chamber arranged such that water around the hull is introduced when the hull is in water, and a water level sensor arranged to detect a water level inside the water detection chamber. The control unit is arranged to judge whether or not the hull is in water based on an output signal of the water level sensor and to set a maximum rotational speed of the engine to a rotational speed less than an upper limit rotational speed so as to restrict the rotational speed of the engine to not more than the maximum rotational speed when the hull is not in water. | 08-19-2010 |
20100227516 | MARINE VESSEL - A marine vessel includes a hull, a propulsion device arranged to propel the hull by a driving force of an engine that has a throttle valve arranged to be electrically controlled so as to open and close, an operation lever arranged to be operated by a marine vessel operator to adjust a throttle opening degree of the throttle valve and arranged to hold an operation position, a fine adjustment switch arranged to be operated by the marine vessel operator to increase or decrease the throttle opening degree to finely adjust the throttle opening degree that has been adjusted by the operation lever, and a control unit arranged to adjust the throttle opening degree based on an operation amount of the operation lever and an operation state of the fine adjustment switch. | 09-09-2010 |
20100240266 | VESSEL SPEED CONTROL SYSTEM FOR SMALL PLANING BOAT AND SMALL PLANING BOAT UTILIZING THE SAME - A speed control system for a small planing boat can comprise a speed sensor to detect a vessel speed of a boat body, a speed information storing unit on which data of a previously set maximum speed limit of the boat body is stored, and a speed control device for controlling the cruising speed of the boat body not to exceed the maximum speed limit based on a result of a correlation between the cruising speed and the maximum speed limit. The speed control device can comprise a revolution speed sensor, a revolution speed acquiring unit and a revolution speed control unit. The speed control device can also work in conjunction with an intake air mass amount control device which can include an electronically-controlled throttle valve, an air mass amount acquiring unit and a throttle opening degree control unit. | 09-23-2010 |
20100248563 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes a hull, an engine, a jet propulsion device, an exhaust channel, and an engine control unit. The engine includes a combustion chamber arranged to combust fuel therein, an exhaust port arranged to discharge exhaust gas after the combustion of the fuel in the combustion chamber, an exhaust valve arranged to open and close the exhaust port, an intake port arranged to pass air and the fuel into the combustion chamber, and an intake valve arranged to open and close the intake port. The jet propulsion device is arranged to be driven by the engine and to draw in water from around the hull and then jet the water. The exhaust channel is connected to the exhaust port of the engine and provides a channel through which the exhaust gas, discharged from the exhaust port, flows. The engine control unit is arranged to control the engine such that at least one location in a path leading from the exhaust channel to the intake port is blocked when the engine is stopped. | 09-30-2010 |
20110223815 | MARINE VESSEL - A marine vessel includes a hull and a jet propulsion device arranged to take in water through an intake port and eject the water through an ejection port rearward with respect to the hull. The ejection port is arranged posterior to the intake port. The marine vessel also includes a reversing member arranged to be movable between a forward drive position and a reverse drive position. The reversing member is arranged to, when placed at the reverse drive position, reverse the direction of the water ejected from the jet propulsion device forward with respect to the hull (in a direction capable of generating a propulsive force in the reverse drive direction). The marine vessel further includes an operation unit arranged to be operated by a marine vessel maneuvering operator to locate the reversing member at the forward drive position or the reverse drive position, and an internal combustion engine arranged to drive the jet propulsion device. The marine vessel also includes a control unit arranged and programmed to operate in a reverse drive mode in which when the reversing member is located at the reverse drive position by the operation unit, and such that the control unit controls the internal combustion engine to operate within a predetermined speed range. | 09-15-2011 |
20130012081 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes an exhaust passage, a catalyst member, a water lock, a first oxygen sensor, and a second oxygen sensor. The exhaust passage guides exhaust gas from an engine to an exterior of a hull of the watercraft. The catalyst member is arranged inside the exhaust passage. The water lock is arranged in the exhaust passage downstream of the catalyst member. The first oxygen sensor is arranged in the exhaust passage upstream of the catalyst member. The second oxygen sensor is arranged in the exhaust passage at a position downstream of the catalyst member and upstream of the water lock. | 01-10-2013 |
20130102206 | WATERCRAFT - In a watercraft, a storage device stores area information including position information regarding a specified area. A controller compares a current position of a watercraft main body obtained by a global navigation satellite system receiver to the position information related to the specified area. The controller controls the watercraft main body in accordance with a normal mode when the current position of the watercraft main body is within the specified area. The controller controls the watercraft main body in accordance with a limited mode in which at least a portion of a plurality of functions of the watercraft main body are limited in comparison with the normal mode when the current position of the watercraft main body is not within the specified area. | 04-25-2013 |
20130110329 | WATERCRAFT | 05-02-2013 |
20130252490 | WATERCRAFT - In a watercraft, an engine rotational speed sensor detects a rotational speed of an engine. A determining section determines if a prescribed execution condition indicating that a hull body is moving is satisfied. A filter processing section applies a filter process to the engine rotational speed detected by the engine speed sensor to acquire a filtered engine rotational speed. A control section executes a maximum speed limiting control to limit a maximum speed of the watercraft when the prescribed execution condition is satisfied and the filtered engine rotational speed is larger than a prescribed rotational speed threshold value. | 09-26-2013 |
20130255560 | WATERCRAFT - A watercraft includes a watercraft body, a watercraft propulsion device, a water protective case, a communication device, and a display device. The watercraft propulsion device propels the watercraft body. The water protective case is arranged on the watercraft body. The communication device communicates with a mobile terminal arranged inside the water protective case. The display device displays content of the mobile terminal based on data received from the mobile terminal through the communication device. | 10-03-2013 |
20140102075 | JET PROPELLED WATERCRAFT - A jet propelled watercraft includes a jet pump that jets water rearward from a jet port, a reverse gate, a reverse gate moving mechanism, and a withdrawal controller. The reverse gate is movable in an up/down direction between a reverse drive position at which an entirety of the jet port is covered and a forward drive position at which the entirety of the jet port is open. In a state of being positioned at the reverse drive position, the reverse gate guides forward the water that has been guided to the jet port. The reverse gate moving mechanism includes an electric motor that generates power to move the reverse gate between the reverse drive position and the forward drive position, and a transmitting mechanism that connects the electric motor and the reverse gate. The withdrawal controller monitors malfunctions of the reverse gate moving mechanism. | 04-17-2014 |
20150040866 | ENGINE SYSTEM FOR VESSEL PROPULSION DEVICE AND VESSEL INCLUDING THE SAME - An engine system for a vessel propulsion device includes an engine including an intake amount adjusting unit and an ignition plug, and configured to generate a drive force for the vessel propulsion device. The engine system includes an ignition timing control unit, a knocking detecting unit, a knocking retard control unit that retards the ignition timing of the ignition plug by a unit retard amount when the knocking detecting unit detects knocking, an abnormality judging unit that, when a state where the knocking detecting unit detects knocking at intervals within a predetermined time continues, judges that an abnormality has occurred based on a continued state of knocking detection, and an intake amount limiting unit that limits the intake amount of the engine based on judgment of an abnormality made by the abnormality judging unit. | 02-12-2015 |