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 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: 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: The present invention is achieved for the purpose of easily detecting a crack or flaw existing in the silicon layer of a wafer in a short period of time. The flaw detector thus provided includes a coil sensor placed at a predetermined distance from the surface of the silicon layer; a radiofrequency applier for applying a radiofrequency to the coil sensor; a scanner for relatively moving the silicon layer and the coil sensor with a constant distance between the surface of the silicon layer and the coil sensor; and a crack detector for detecting a crack or flaw existing in the silicon layer by detecting the change of a signal provided from the coil sensor or the change in the radiofrequency applied by the radiofrequency applier. The frequency of the radiofrequency applied by the radiofrequency applier may be set between 5 MHz and 200 MHz. This enables a flaw detection for a silicon layer which has been considered to be impossible.