Abstract: In the engine having a plurality of wire harnesses, a groove section is formed by conductive walls configured to surround a part of the outer peripheral surface of selected one of the wire harnesses. Another one of the wire harnesses is attached to a wire harness cover fixed to the engine by a plate section extended from the groove section in such a manner that the another one of the wire harnesses is disposed adjacent to the selected one of the wire harnesses with one of the walls being interposed inbetween.

Abstract: In the engine having a plurality of wire harnesses, a groove section is formed by conductive walls configured to surround a part of the outer peripheral surface of selected one of the wire harnesses. Another one of the wire harnesses is attached to a wire harness cover fixed to the engine by a plate section extended from the groove section in such a manner that the another one of the wire harnesses is disposed adjacent to the selected one of the wire harnesses with one of the walls being interposed inbetween.

Abstract: In order to constitute a fuel high-pressure pipe that is compact and easy to connect to injectors, one of both the end sections of a fuel high-pressure pipe is formed as a first connecting section connected to a fuel supply port of one injector, and the other one of the end sections of the fuel high-pressure pipe is formed as a second connecting section connected to a fuel discharge port of another injector. The first connecting section and the second connecting section are linearly formed parallel to each other, and head sections of the first connecting section and the second connecting section, said head sections being on the connecting side to respective injectors, are formed in the directions opposite to each other.

Abstract: An engine control device includes an engine failure determination unit and a rotation rate control unit. The engine failure determination unit determines whether or not a predetermined failure condition is satisfied based on a result of detection performed by a sensor that detects the state of a marine vessel engine. If an engine rotation rate is higher than a limited rotation rate when the engine failure determination unit determines that the failure condition is satisfied, the rotation rate control unit decreases the engine rotation rate to the limited rotation rate and performs a limited-operation control for rejecting any rotation rate operation that indicates a higher engine rotation rate than the limited rotation rate.

Abstract: In order to constitute a fuel high-pressure pipe that is compact and easy to connect to injectors, one of both the end sections of a fuel high-pressure pipe is formed as a first connecting section connected to a fuel supply port of one injector, and the other one of the end sections of the fuel high-pressure pipe is formed as a second connecting section connected to a fuel discharge port of another injector. The first connecting section and the second connecting section are linearly formed parallel to each other, and head sections of the first connecting section and the second connecting section, said head sections being on the connecting side to respective injectors, are formed in the directions opposite to each other.

Abstract: An engine provided with a variable parallel supercharging system (9) comprising a first supercharger (10) which is driven by exhaust gas which flows in a first exhaust gas route (41) and which pressurizes intake air which flows in a first intake air route (3) and also comprising a second supercharger (20) which is driven by exhaust gas which flows in a second exhaust gas route (42) and which pressurizes intake air which flows in a second intake air route (4), a supercharging pressure sensor (63) for detecting the pressure of the pressurized intake air, a first supercharger rotation sensor (61) for detecting the rotational speed of the first supercharger (10), a second supercharger rotation sensor (62) for detecting the rotational speed of the second supercharger (20), a first variable actuator (14) for adjusting the capacity of the first supercharger (10), a second variable actuator (24) for adjusting the capacity of the second supercharger (20), and a control device for controlling each of the variable actua

Abstract: In order to reduce radiation heat from the turbine housing of a supercharger, the turbine housing is conventionally water-cooled or covered with a heat shielding material, but it is required to control heat loss due to excessive water cooling or high temperature on the outer surface of the heat shielding material. On the contrary, a solution by a cooling structure consisting of an inner thermal insulation portion of an air layer and an outer low temperature portion covering the inner thermal insulation portion has an inevitable problem of increasing number of components and upsizing.

Abstract: An engine (100) provided with a variable series supercharging system (7) composed of a high-pressure supercharger (10) and a low-pressure supercharger (20), a supercharging pressure sensor (63) for detecting the pressure of intake air pressurized by the variable series supercharging system (7), a high-pressure supercharger rotation sensor (61) for detecting the rotational speed of the high-pressure supercharger (10), a variable actuator (14) for adjusting the capacity of the high-pressure supercharger (10), and a control device (60) capable of controlling the variable actuator (14). The control device (60) controls the variable actuator (14) based on detection signals from the supercharging pressure sensor (63) and the high-pressure supercharger rotation sensor (61).

Abstract: It is an object to provide an engine that makes it possible to constantly detect the number of rotations of a supercharger with a calculation load of an ECU reduced. An engine 1 is provided with an engine base 8 comprised of a plurality of cylinders and a turbocharger 7, a crank angle sensor 4, a turbo sensor 5 that detects rotations of the turbocharger 7 as pulses, an amplifier 11 that divides the pulses by an arbitrary division ratio and calculates the divided pulses, and an ECU 10 that judges a surge condition of the turbocharger 7, wherein the ECU 10 sets a predetermined position of a piston of each cylinder in a crank angle of the engine base 8 to count start timing of the divided pulses, outputs the divided pulses counted from the count start timing to the number of predetermined rotations as a first output, and judges that, if a difference between the first outputs at every cylinder is more than a predetermined value, the turbocharger 7 is in the surge condition.

Abstract: A diesel engine in which a lubrication oil on the wall surface of the cylinder liner is prevented from being burned and diluted, and a smoke resulting from the local lack of air in the combustion chamber is also prevented from being generated. The diesel engine comprises a group injection hole nozzle 20 and a piston 110. A step 115 having a height gradually increased toward the radial outer circumference of the piston is formed over the entire circumference of the top surface 111 of the piston. Furthermore, a tilted part 115b is formed as the step surface of the step 115.

Abstract: A cetane number detection device in which an angular velocity detection device (10) for detecting the rotation angular velocity of the crankshaft (11) of an engine (54), and which detects a variation in the value of the amplitude of the angular velocity detected by the angular velocity detection device (10) as a variation in cetane number.

Abstract: In a diesel engine equipped with an injector 1 having a plurality of intersections between an axis line of the injector 1 and the axes of injection holes 10a bored in the injector 1, an air intake valve 25 is controlled so that it is closed at timing before a BDC (at timing when a piston comes to a bottom dead center) by an ECU 50, which controls the timing of closing the air intake valve 25 based on operating conditions of the engine.

Abstract: An engine provided with a variable parallel supercharging system (9) comprising a first supercharger (10) which is driven by exhaust gas which flows in a first exhaust gas route (41) and which pressurizes intake air which flows in a first intake air route (3) and also comprising a second supercharger (20) which is driven by exhaust gas which flows in a second exhaust gas route (42) and which pressurizes intake air which flows in a second intake air route (4), a supercharging pressure sensor (63) for detecting the pressure of the pressurized intake air, a first supercharger rotation sensor (61) for detecting the rotational speed of the first supercharger (10), a second supercharger rotation sensor (62) for detecting the rotational speed of the second supercharger (20), a first variable actuator (14) for adjusting the capacity of the first supercharger (10), a second variable actuator (24) for adjusting the capacity of the second supercharger (20), and a control device for controlling each of the variable actua

Abstract: An engine (100) provided with a variable series supercharging system (7) composed of a high-pressure supercharger (10) and a low-pressure supercharger (20), a supercharging pressure sensor (63) for detecting the pressure of intake air pressurized by the variable series supercharging system (7), a high-pressure supercharger rotation sensor (61) for detecting the rotational speed of the high-pressure supercharger (10), a variable actuator (14) for adjusting the capacity of the high-pressure supercharger (10), and a control device (60) capable of controlling the variable actuator (14). The control device (60) controls the variable actuator (14) based on detection signals from the supercharging pressure sensor (63) and the high-pressure supercharger rotation sensor (61).

Abstract: In order to reduce radiation heat from the turbine housing of a supercharger, the turbine housing is conventionally water-cooled or covered with a heat shielding material, but it is required to control heat loss due to excessive water cooling or high temperature on the outer surface of the heat shielding material. On the contrary, a solution by a cooling structure consisting of an inner thermal insulation portion of an air layer and an outer low temperature portion covering the inner thermal insulation portion has an inevitable problem of increasing number of components and upsizing.

Abstract: A diesel engine in which a lubrication oil on the wall surface of the cylinder liner is prevented from being burned and diluted, and a smoke resulting from the local lack of air in the combustion chamber is also prevented from being generated. The diesel engine comprises a group injection hole nozzle 20 and a piston 110. A step 115 having a height gradually increased toward the radial outer circumference of the piston is formed over the entire circumference of the top surface 111 of the piston. Furthermore, a tilted part 115b is formed as the step surface of the step 115.

Abstract: It is an object to provide an engine that makes it possible to constantly detect the number of rotations of a supercharger with a calculation load of an ECU reduced. An engine 1 is provided with an engine base 8 comprised of a plurality of cylinders and a turbocharger 7, a crank angle sensor 4, a turbo sensor 5 that detects rotations of the turbocharger 7 as pulses, an amplifier 11 that divides the pulses by an arbitrary division ratio and calculates the divided pulses, and an ECU 10 that judges a surge condition of the turbocharger 7, wherein the ECU 10 sets a predetermined position of a piston of each cylinder in a crank angle of the engine base 8 to count start timing of the divided pulses, outputs the divided pulses counted from the count start timing to the number of predetermined rotations as a first output, and judges that, if a difference between the first outputs at every cylinder is more than a predetermined value, the turbocharger 7 is in the surge condition.