A technique for testing a pushrod valvetrain in an engine includes replacing an original pushrod with an instrumented pushrod (IPD) which includes a sensor configured to measure strain and/or motion. The engine is then operated, and the output of the sensor is monitored for anomalies. Diagnosis and repair of identified defects may then follow.

An apparatus is provided to test valves. The apparatus includes a sensor and a driving mechanism. The driving mechanism is configured to control an external camshaft that is coupled to a valve train of an engine head. The apparatus controls the driving mechanism to control a rotation of the external camshaft that further controls an activation of each valve of the valve train associated with the engine head. The apparatus further controls the sensor to acquire information associated with the activation of each valve of the valve train based on the rotation of the external camshaft. The apparatus further compares the acquired information with pre-stored information, to determine an abnormality in each valve of the valve train, and generates a notification based on the comparison.

An apparatus is provided to test valves. The apparatus includes a sensor and a driving mechanism. The driving mechanism is configured to control an external camshaft that is coupled to a valve train of an engine head. The apparatus controls the driving mechanism to control a rotation of the external camshaft that further controls an activation of each valve of the valve train associated with the engine head. The apparatus further controls the sensor to acquire information associated with the activation of each valve of the valve train based on the rotation of the external camshaft. The apparatus further compares the acquired information with pre-stored information, to determine an abnormality in each valve of the valve train, and generates a notification based on the comparison.

The present disclosure provides a sensor for measuring cam and tappet contact force of an engine and a measuring method. The sensor comprises a force carrying element, a force transmission element, a piezoelectric element, a force bearing element, a tappet head and a guide woodruff key. Meanwhile, the present disclosure also provides a measuring method by using the sensor. The sensor is simple in mechanism and convenient to use and can realize the measurement of the cam tappet contact force in the normal direction, the tangential direction and the axial direction of the contact surface.

An attachment structure for a vehicle motor is applied for the purpose of attaching a vehicle motor to in-vehicle equipment. The attachment structure for a vehicle motor is provided with an axial gap motor that includes a rotor and a stator facing each other in the axial direction. The motor is attached to the in-vehicle equipment in a mode in which the axial direction is perpendicular to the vertical direction.

An internal combustion engine has a valvetrain that includes a rocker arm assembly on which is mounted an electronic device and at least a part of a generator. The generator converts some of the mechanical energy that is transmitted through the rocker arm assemblies into electricity. That electricity may be used to power an electric latch, a transmitter, or another type of rocker arm assembly-mounted electrical device. Various generator configurations are described. In some configurations, the generator is piezoelectric. In other configurations, the generator is electromagnetic. In some configurations, the generator is driven by force transmitted by the rocker arm assembly from a cam. In some configurations, the generator is driven by vibrations.

An adaptive, any-fuel reciprocating engine using sensor feedback integration of high-speed optical sensors with real-time control loops to adaptively manage the electronic actuation schemes over a range of engine loads and fuels. The engine uses one or more optical sensors to collect specific types of gas property data via a spectroscopic technique to adaptively control various components within the engine.

The invention relates to an electromagnetic actuator arrangement comprising an electromagnetic actuator device (2), in particular a camshaft adjusting device, having a housing (4) and at least one armature unit which can be driven, in response to the energization of a stationary, axially aligned coil unit, in or parallel to the axial direction and which is designed to interact with at least one slide and/or tappet unit (6, 7) extending in the axial direction, in particular a tappet unit (6, 7) effecting a camshaft adjustment of an internal combustion engine, and at least one switching gate (12) which can be arranged on a slide cam (14) and through which a transverse central plane (56) passes, wherein the actuator device (2) comprises a detection device for contactless magnetic and/or electrical interaction with the switching gate (12), which detection device comprises at least one magnetic field and/or electric field detection means which is designed to produce and/or detect a detection field acting directly on the switching gate (12), and a detection field evaluation means (32) which is designed to determine the position of the switching gate (12) by means of the measured detection field, the magnetic field and/or electric field detection means being arranged at least partially outside the housing (4).

The invention relates to an electromagnetic positioning device (10) having energizable stationary coil means (1), a magnetic guide element (2) associated thereto and having a core section (2a) and an anchor unit (3) moveable in relation to the guide element (2) and along an axial movement direction (L) as a reaction to an energization of the coil means (1), wherein the guide element (2) is a hollow cylinder that partially surrounds the anchor unit (3). The positioning device (10) has an ultra-wide-band sensor unit (4) which is preferably integrated in the guide element (3) and is designed for measuring the position and/or the displacement of the anchor unit (3) in the guide element (2).

A control device and a control method for variable valve timing mechanism according to the present invention obtains a first measurement of a rotational phase based on a rotational angle of the motor, obtains a second measurement of the rotational phase based on a relative relationship between a rotational angle of the crankshaft and a rotational angle of the camshaft, calibrates the first measurement based on the second measurement, obtains a derivative term proportional to a rate of change in a deviation between the first measurement and a target value, reduces change in derivative term when calibrating the first measurement based on the second measurement, and controls the motor based on a manipulated variable including the derivative term.