Abstract: A pipe measuring apparatus includes a measurement probe that performs a non-contact measurement of a pipe as a measurable object; and a displacement mechanism that relatively displaces the measurement probe in three mutually orthogonal axis directions relative to the pipe.

Abstract: A pipe measuring apparatus includes a measurement probe that performs a non-contact measurement of a pipe as a measurable object; and a displacement mechanism that relatively displaces the measurement probe in three mutually orthogonal axis directions relative to the pipe.

Abstract: Provided is an engine capable of performing post-injection control with a proper fuel injection amount. The engine (1) comprises an engine body (10) equipped with a turbocharger (7), an engine rotational speed sensor (21), an acceleration opening degree sensor (24), a boost sensor (23), a turbo sensor (22), and an ECU (100) for performing post-injection control. The ECU (100) recognizes the rotational speed of the engine, the supercharging pressure, the load on the engine, and the rotational speed of the supercharger, and so performs the post-injection control that the rotational speed of the supercharger becomes equal to the target rotational speed of the supercharger calculated in the ECU (100).

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: Turbines and compressors, which constitute superchargers, are disposed in series on an exhaust gas passage and an air intake passage, respectively. The supercharger is equipped with a supercharger rotation sensor, which transmits a detection signal obtained according to the rotation of the compressor to a control device, a bypass passage, which bypasses exhaust gas from the upstream side to the downstream side of the turbine, and a bypass valve, which regulates the flow rate of exhaust gas flowing through the bypass passage. Control device regulates the rotational speed of the compressors in a high-efficiency range by producing a control signal based on the detection signal from the supercharger rotation sensor, and sending the control signal to the bypass valve.

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: An engine in which a fluctuation in the amount of fuel injection is reduced in the entire operating tolerance of the engine. The engine (1) has an engine body (5) provided with a turbocharger (7), an engine speed sensor (21), a turbo sensor (22), a boost sensor (23), and an ECU (20) for correcting the amount of fuel injection. A control means recognizes an engine speed, a supercharging pressure, a supercharger speed, a fuel injection amount and corrects the fuel injection amount.

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: In an engine equipped with a supercharger consisting of a compressor having a plurality of blades on a turbine shaft and a turbine, at least one index means provided on the turbine shaft or the plurality of blades, and a turbo angular velocity sensor, which detects a rotation of the index means and a rotation of the plurality of blades respectively and connected to an ECU. In the engine, also, a turbo angular velocity computing means, which calculates an angular velocity by obtaining a plurality of pulses per one rotation of the turbine shaft, is provided.

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: Turbines (21b, 31b) and compressors (21a, 31a), which constitute superchargers (21, 31), are disposed in series on an exhaust gas passage (3) and an air intake passage (2), respectively. The supercharger (31) is equipped with a supercharger rotation sensor (61), which transmits a detection signal obtained according to the rotation of the compressor (31a) to a control device, a bypass passage (4), which bypasses exhaust gas from the upstream side to the downstream side of the turbine (31b), and a bypass valve (34), which regulates the flow rate of exhaust gas flowing through the bypass passage (4). Control device (60) regulates the rotational speed of the compressors (21a, 31a) in a high-efficiency range by producing a control signal based on the detection signal from the supercharger rotation sensor (61), and sending the control signal to the bypass valve (34).

Abstract: An engine in which a fluctuation in the amount of fuel injection is reduced in the entire operating tolerance of the engine. The engine (1) has an engine body (5) provided with a turbocharger (7), an engine speed sensor (21), a turbo sensor (22), a boost sensor (23), and an ECU (20) for correcting the amount of fuel injection. A control means recognizes an engine speed, a supercharging pressure, a supercharger speed, a fuel injection amount and corrects the fuel injection amount.

Abstract: Provided is an engine capable of performing post-injection control with a proper fuel injection amount. The engine (1) comprises an engine body (10) equipped with a turbocharger (7), an engine rotational speed sensor (21), an acceleration opening degree sensor (24), a boost sensor (23), a turbo sensor (22), and an ECU (100) for performing post-injection control. The ECU (100) recognizes the rotational speed of the engine, the supercharging pressure, the load on the engine, and the rotational speed of the supercharger, and so performs the post-injection control that the rotational speed of the supercharger becomes equal to the target rotational speed of the supercharger calculated in the ECU (100).

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: In an engine 1 equipped with a supercharger 40 consisting of a compressor 41 having a plurality of blades 45 on a turbine shaft 42 and a turbine 42, at least one index means 44 is provided on the turbine shaft 42 or the plurality of blades 45, and a turbo angular velocity sensor 62, which detects a rotation of the index means 44 and a rotation of the plurality of blades 45 respectively, is provided and connected to an ECU 60. In the engine 1, also, a turbo angular velocity computing means, which calculates an angular velocity by obtaining a plurality of pulses per one rotation of the turbine shaft, is provided.

Abstract: A fuel injection control method for controlling fuel injection to a plurality of cylinders of an engine is disclosed. The method involves the use of a fuel injection control device that includes a key switch, an engine rotation sensor, and a controller, wherein the key switch initiates an engine stopping operation, engine rotation sensor recognizes fuel injection to a specific cylinder, and then the controller stops fuel injection. A phase difference is provided between fuel injection of the specific engine and that of another engine so as to control fuel injection.

Abstract: In a method for boring injection holes of an injector 1 having a plurality of intersections between an axis line of the injector 1 and the axes of the injection holes 10a bored in the injector 1, or so-called a group of injection holes 10, flat sections 10c, 10d, which are perpendicular to the injection holes 10a and include apertures of the injection holes 10a, are formed on boring portions of injection holes 10a. The boring portions are provided with recessed portions 10b and the recessed portions 10b are formed at the bottom thereof with flat sections 10c. Alternatively, the flat sections 10c, 10d are formed by cutting the boring portions, or by forging them.

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.