Abstract: A vehicle includes an engine in which an intake valve is provided in each of a plurality of cylinders and an ECU for controlling the engine. An intake valve provided for at least any one of the plurality of cylinders opens when an output shaft of the engine stops. The ECU changes an intake valve which opens when the output shaft of the engine stops, while the vehicle is running.

Abstract: A hybrid vehicle includes an internal combustion engine; a rotating electrical machine that rotates an output shaft of the internal combustion engine; and a control unit that performs automatic stop control for the internal combustion engine. The control unit causes the output shaft to rotate using the rotating electrical machine, when a stop period of the internal combustion engine according to the automatic stop control is equal to or longer than a first period.

Abstract: A vehicle includes an engine in which an intake valve is provided in each of a plurality of cylinders and an ECU for controlling the engine. An intake valve provided for at least any one of the plurality of cylinders opens when an output shaft of the engine stops. The ECU changes an intake valve which opens when the output shaft of the engine stops, while the vehicle is running.

Abstract: A hybrid vehicle includes an internal combustion engine; a rotating electrical machine that rotates an output shaft of the internal combustion engine; and a control unit that performs automatic stop control for the internal combustion engine. The control unit causes the output shaft to rotate using the rotating electrical machine, when a stop period of the internal combustion engine according to the automatic stop control is equal to or longer than a first period.

Abstract: When an injection sharing ratio r is neither 0 nor 1, an engine ECU executes a program including a step of calculating a purge reduction amount of an in-cylinder injector as fpg×r and calculating a purge reduction amount of an intake manifold injector as fpg×(1?r) when performing purge processing according to a current fuel injection sharing ratio of the injectors, and a step of calculating a correction fuel injection amount of the in-cylinder injector by raising the fuel injection amount to a minimum fuel injection amount, and calculating a correction fuel injection amount of the intake manifold injector by subtracting the raised amount from the fuel injection amount of the intake manifold injector when the fuel injection amount of the in-cylinder injector calculated by using the purge reduction amount is lower than the minimum injection amount.

Abstract: Avoiding inconvenience during purge processing execution of fuel vapor in an internal combustion engine including an in-cylinder injector and an intake manifold injector. An engine ECU 300 executes a program including the steps of: when the purge control execution flag is ON (YES at S400), the step (S410) of calculating injection ratio (DI ratio) r; the step (420) of calculating the basic injection amounts of the in-cylinder injector and the intake manifold injector; when the injection ratio r is not 0 (NO at S430) and the injection ratio r is not 1 (NO at S460), the step (S480) of substituting 0 for purge reduction calculation value fpgd at the in-cylinder injector side, and substituting fpg for purge reduction calculation value fpgp of the intake manifold injector side; and the step (490) of calculating the final injection amounts of the in-cylinder injector and the intake manifold injector.

Abstract: When an injection sharing ratio r is neither 0 nor 1, an engine ECU executes a program including a step of calculating a purge reduction amount of an in-cylinder injector as fpg×r and calculating a purge reduction amount of an intake manifold injector as fpg×(1-r) when performing purge processing according to a current fuel injection sharing ratio of the injectors, and a step of calculating a correction fuel injection amount of the in-cylinder injector by raising the fuel injection amount to a minimum fuel injection amount, and calculating a correction fuel injection amount of the intake manifold injector by subtracting the raised amount from the fuel injection amount of the intake manifold injector when the fuel injection amount of the in-cylinder injector calculated by using the purge reduction amount is lower than the minimum injection amount.

Abstract: The engine ECU executes the program including the step of starting a timer that counts the time elapsed from a start request, the step of detecting a temperature of the engine, and the step of calculating a DI ratio r such that the fuel is injected from the in-cylinder injector as well, when the engine is in the very cold or cold state, when there is no abnormality in the fuel system, and when starting of the engine is not yet detected even after a lapse of a predetermined period of time from the start request, only if the fuel pressure in the high-pressure system is not lower than a fuel pressure threshold value.

Abstract: The engine ECU executes the program including the step of starting a timer that counts the time elapsed from a start request, the step of detecting a temperature of the engine, and the step of calculating a DI ratio r such that the fuel is injected from the in-cylinder injector as well, when the engine is in the very cold or cold state, when there is no abnormality in the fuel system, and when starting of the engine is not yet detected even after a lapse of a predetermined period of time from the start request, only if the fuel pressure in the high-pressure system is not lower than a fuel pressure threshold value.

Abstract: When an injection sharing ratio r is neither 0 nor 1, an engine ECU executes a program including a step of calculating a purge reduction amount of an in-cylinder injector as fpg×r and calculating a purge reduction amount of an intake manifold injector as fpg×(1-r) when performing purge processing according to a current fuel injection sharing ratio of the injectors, and a step of calculating a correction fuel injection amount of the in-cylinder injector by raising the fuel injection amount to a minimum fuel injection amount, and calculating a correction fuel injection amount of the intake manifold injector by subtracting the raised amount from the fuel injection amount of the intake manifold injector when the fuel injection amount of the in-cylinder injector calculated by using the purge reduction amount is lower than the minimum injection amount.

Abstract: A flexural vibration sensor including a housing fabricated from a magnetizable material for providing an internal magnetic path and having a coupling surface for contact with an associated structural member; electrically conductive coil means positioned within the housing; and means for generating a magnetic field within the internal magnetic path, through the coil means and along the coupling surface in the region exterior to the housing so that variations in the strength of that portion of the magnetic field in the region exterior to the housing caused by flexural vibration of the associated structural member when the sensor is attached thereto are sensed by the electrically conductive coil means and manifested by a variable electrical signal.

Abstract: Apparatus for providing a surface angularly adjustable with respect to a reference surface includes a substantially spherical ferromagnetic mount having a flattened surface thereon, an annular-shaped magnet disposed between the mount and the reference surface for magnetically holding the mount in a desired position with respect to the reference surface, and a series of openings formed in the spherical ferromagnetic mount into which rods may be inserted and the outwardly extending end thereof adjusted to thereby adjust the angular orientation of the surface on the sphere with respect to the reference surface.

Abstract: A method of and apparatus for inducing stresses in solid materials in such a manner as to find application to stress relieving and fatigue testing procedures, and a procedure of non-destructively testing structural elements after they are in place within a larger structure. The present invention utilizes the higher resonant modes of vibration of the workpiece or structure undergoing treatment or testing to induce stress waves having maximum moment at many locations distributed over the surface.

Abstract: A magnetic gyroscope includes a flexible rotating disk having a plurality of magnetic regions formed in or on the periphery of the disk. Typically four pairs of magnetic sensors are disposed about the disk at 90.degree. angles with respect to each other to detect the magnetic regions as the disk rotates, each sensor pair including a sensor above the disk and one below it. The sensors detect changes in the separation of the disk from the sensors and supply this information to an amplifier to control the gyroscope or the structure within which the gyroscope is mounted.

Abstract: A transducer for detecting the position of a mass includes a base, a mass disposed above the base and ohmically separated therefrom, a piezoelectric transducer for inducing relative motion between the base and the mass, typically by suspending the mass on a fluid oscillating at high frequency, an electric field generator on one of the base or the mass, and a conducting antenna on the other of the base or mass for detecting the position of the electric field with respect to the base. The oscillating fluid both supports the mass and generates displacement currents by creating relative motion between the mass and the base.

Abstract: An apparatus for controlling vibration in a structural element includes a first magnet attached to the structural element, a sensing device positioned to detect motion of the structural element, and a vibration control device connected to receive information from the sensing device concerning motion of the structural element. The vibration control device includes a second magnet spaced apart from the first magnet and a coil for varying the magnetic field between the first magnet and the second magnet. The coil, in response to signals from the sensing device, alters the strength of the magnetic field and thereby controls vibration of the structural element.

Abstract: A flexural vibration sensor including a housing fabricated from a magnetizable material for providing an internal magnetic path and having a coupling surface for contact with an associated structural member; electrically conductive coil means positioned within the housing; and means for generating a magnetic field within the internal magnetic path, through the coil means and along the coupling surface in the region exterior to the housing so that variations in the strength of that portion of the magnetic field in the region exterior to the housing caused by flexural vibration of the associated structural member when the sensor is attached thereto are sensed by the electrically conductive coil means and manifested by a variable electrical signal.

Abstract: A displacement current sensor for generating electrical signals representative of relative motion between a conductor and an electric field source.The sensor includes means for generating an electric field and electrically conductive means positioned for interaction with the electric field, the field generating means and the electrically conductive means being relatively movable so that variations in the field encountered by the electrically conductive means induces a displacement current, as opposed to a conduction current, in the electrically conductive means.The field generating means preferably is fabricated from an electret formed in any one of a wide variety of geometrical shapes, such as planar, cylindrical or special geometrical configurations; the electrically conductive means may comprise one or more plates, wires, rods, or other special shapes.

Abstract: A gyroless vertical indicating device which tracks the local gravity vector independent of horizontal acceleration. A compound pendulum and an angular accelerometer each has a single rotational degree of freedom about a common axis. Rotational motion of the pendulum and of the angular accelerometer about the axis is coupled by a quartz fiber suspension therealong. A signal representative of the relative angular velocity between the pendulum and the angular accelerometer is fed back to a torquing system which maintains the pendulum's orientation along the local gravity vector.

Abstract: A method and system for monitoring the angular deformation of structural elements in a composite structure in response to imposed mechanical vibrations in which the structure is part of the monitoring system.A plurality of angular motion signal generating sensors are provided at different selected locations in a composite structure, each sensor being associated to a corresponding structural element. Signals output from the sensors in response to vibrations propagated within the composite structure are detected and a vibration signature for the entire structure is established. The sensor outputs are subsequently monitored and compared with the previously established vibration signature to detect differences therebetween designating changes in the vibration response and potential structural failures.The angular motion sensors employ a magnet and a coil in which a voltage and current are induced in response to angular deflections of the structural member to which the sensor is attached.