Abstract: A method is described for determining information about a rotational speed of a compressor, in particular a turbocharger, by providing a measuring signal, in particular a microwave measuring signal, which is directed at a compressor impeller of the compressor, so that the measuring signal is reflected on revolving blades of the compressor impeller, detecting the measuring signal reflected by one or more blades, and determining the information about the rotational speed as a function of the reflected measuring signal.

Abstract: A reference signal generator generating a reference signal for high-resolution measurement/control in real time includes a means for calculating the rotational trend, e.g. increase/decrease in the r.p.m.

Abstract: Combustion within an internal combustion engine is diagnosed and includes monitoring crankshaft angular velocity and generating a combustion phasing value for a combustion chamber based on the crankshaft angular velocity. The combustion phasing value is compared to an expected combustion phasing value based on a predetermined start of injection crank angle and combustion phasing differences greater than an allowable combustion phasing difference are identified based on the comparison.

Abstract: A diagnostic system includes a first pressure monitoring module, a second pressure monitoring module, and a fault determination module. The first pressure monitoring module determines low-lift pressures and high-lift pressures in a cam phaser when a first oil control valve (OCV) moves first valve lifters to the low-lift state and the high-lift state, respectively. The second pressure monitoring module determines low-lift pressures and high-lift pressures in the cam phaser when a second OCV moves second valve lifters to the low-lift state and the high-lift state, respectively. The fault determination module diagnoses a fault in one of the first OCV and the second OCV based the low-lift pressures and the high-lift pressures.

Abstract: A device is disclosed for sensing the speed of an EMD 567/645/710 two-cycle diesel engine having a crankcase, electronic fuel injectors and an electronic control system for controlling the electronic fuel injectors. The device includes a spline shaft sized for insertion into the crankcase of the engine so that the spline shaft rotates with the engine, a gear operably secured to the spline shaft to rotate with the spline shaft and sized to rotate with the engine in a 1:1 ratio, and at least one electronic sensor located adjacent the gear to sense rotation of the gear. The at least one electronic sensor is connectable to the electronic control system to provide electronic signals to the electronic control system for determining when to inject fuel with the electronic fuel injectors. Also disclosed is a method for retrofitting the engine and a kit for retrofitting the engine.

Abstract: In a method for reducing engine vibrations during engine braking with a malfunctioning engine brake, the engine brake includes an arrangement for altering a timing of at least one exhaust valve and an arrangement for varying an exhaust gas back pressure. The method includes detecting piston acceleration for each cylinder in the engine during the use of the engine brake, comparing the detected piston acceleration with a predetermined reference value, decreasing exhaust gas back pressure during engine braking if at least one piston is detected with a piston acceleration deviating more than a predefined amount from the predetermined reference value so that the piston acceleration will be falling within the predefined amount from the predetermined reference value.

Abstract: A control apparatus for controlling a source of rotational drive force based on a target rotational speed. The control apparatus includes a target model rotational speed calculation section, an actual rotational speed detection section, and a target rotational speed adjustment section. The target model rotational speed calculation section calculates a rotational speed corresponding to a target drive force of the source as a target model rotational speed. The actual rotational speed detection section detects an actual of the source. The target rotational speed adjustment section sets the target rotational speed by correcting a value of the target model rotational speed calculated by the target model rotational speed calculation section to gradually approach the actual rotational speed detected by the actual rotational speed detection section.

Abstract: The course of torque transmitted though a driving shaft (3) between torque generating device (1) to be tested and a driving or loading mechanism (2) is determined during an identification phase in the completely constructed test bench with the use of a rotating driving or loading mechanism (2) at pseudo-stochastic rotational speeds. Determined are thereby parameters describing in a real and current manner the dynamic behavior of the driving shaft (3) whereby the parameters are used as an influence in further testing.

Abstract: There is provided a method for troubleshooting noise/vibration issues of rotating components, the method comprising: receiving an audio signal of the rotating components in operation; generating a frequency spectrum corresponding to the audio signal; selecting a frequency ?m in the frequency spectrum corresponding to a maximum amplitude; and comparing the frequency ?m to a set of predetermined rotational speeds of the rotating components to find a match; thereby identifying a potentially defective component.

Abstract: A sensor arrangement has a sensor element. A contact element is in electrical contact on the one hand with the sensor element and on the other with contact pins. The contact element is insert moulded with a plastic body. Affixing positions to which the contact element has been affixed, and on which the contact element is exposed respectively have one collar made of plastic material which runs around the exposed areas of the contact element. A sensor arrangement results for which the cost of manufacture is lower than that of the prior art, while the same security against unwanted electrostatic discharging or against the formation of an unwanted short circuit remains.

Abstract: A cam sensor is provided in a position opposing one surface side of a cam driven sprocket in a valve timing control device. When the valve timing control device is in a high revolution state, a weight is pivoted by centrifugal force caused by the rotation. This allows a projection at the weight to be detected by the cam sensor. In this case, for each rotation of the valve timing control device, the projection of the weight passes the detectable position of the cam sensor and a pulse is generated in a cam signal to be transmitted from the cam sensor to an ECU.

Abstract: A method for determining the speed of a starter for starting internal combustion engines. The starter speed may be ascertained in a particularly simple and cost-effective manner in that it is calculated from different electrical variables and is calibrated by comparison to the internal combustion engine speed.

Abstract: A cetane number detection means in which an angular velocity detection means (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 means (10) as a variation in cetane number.

Abstract: A method for identifying wheels (4) mounted on a vehicle with an engine, wherein each wheel is fitted with a vibration sensor (15) and, initially, in a preliminary phase, with the engine running, the signal delivered by a vibration sensor is analyzed in order to establish a cross-reference table between given values of rotation speeds of the engine and the corresponding values of a parameter characteristic of the signal delivered by this vibration sensor. The identification procedure includes measuring real speeds of rotation of the engine, and comparing the measured values of rotation speed of the engine with the values of rotation speed of the engine calculated from the analysis of the signal delivered by a vibration sensor, so as to validate the identification of the corresponding wheel during a correlation between the measured and calculated values of rotation speed of the engine.

Abstract: A method of real-time analysis of an engine, comprising sensing a temperature within a chamber of the engine with a thermocouple sensor disposed on a spark plug operating within the chamber, the thermocouple sensor generating a first signal based upon the temperature within the chamber; detecting current on a wire coupled to the sparkplug with a sensor, the sensor generating a second signal based upon current detected on the wire; converting the first and second signal into a first and second optical signal respectively utilizing one or more signal conditioners; generating a first and second digital signal based upon the first and second optical signal respectively with a receiver; and transmitting the first and second digital signal to an analysis device to generate a display of the temperature as it relates to engine speed at a first time in response to the receipt of the first and second digital signal.

Abstract: An angular speed detecting apparatus for a crankshaft of an internal combustion engine. The angular speed detecting apparatus detects a rotational angular speed of the crankshaft based on an output of a pulse generator which generates a crank pulse at every predetermined rotational angle of the crankshaft. An average value of a speed parameter indicating a rotational angular speed of the crankshaft is calculated using the data sampled at intervals of 720/N degrees where N is a number of cylinders of the engine. A learning correction coefficient for correcting the speed parameter is calculated according to the average value. The speed parameter is corrected using the learning correction coefficient.

Abstract: An engine measurement device includes a detector for measuring individual pieces of time series data containing at least a speed and output torque of an engine in a transient state while the engine is being run in combustion by control of an engine control unit, a torque operation unit for calculating the engine torque on the basis of the time series data of the engine speed and the output torque, and a model operation unit for modeling the engine torque as functions of the engine speed and a fuel injection time. This model is used to calculate both a fuel torque generated by the combustion run of the engine and a mechanical loss torque or the difference between the engine torque and the fuel torque.

Abstract: A method for determining a critical reduction in shaft speed in a work machine having at least one monitored shaft driven by a crankshaft of an engine includes determining an actual rotational speed of the crankshaft; determining an actual rotational speed of a first monitored shaft; determining a filtered rotational speed of the first monitored shaft based on an algorithm that utilizes the actual rotational speed of the first monitored shaft, the actual rotational speed of the crankshaft, and a reference rotational speed of the crankshaft; comparing the filtered rotational speed to the actual rotational speed of the first monitored shaft; determining whether the actual rotational speed of the first monitored shaft deviates from the filtered rotational speed by a predetermined amount; and activating an alarm if the actual rotational speed of the first monitored shaft deviates from the filtered rotational speed by the predetermined amount.

Abstract: A rough road detection system includes an engine speed module, a feature space module, a normalization module, and a rough road module. The engine speed module generates an engine speed signal based on a crank signal. The feature space module generates a feature space signal based on the engine speed signal. The normalization module generates a normalized signal. The normalized signal is based on the feature space signal and a normalization value that varies in accordance with the engine speed signal. The rough road module determines whether a rough road condition exists based on the normalized signal.

Abstract: A system to prevent engine stalls for a machine having a power source is disclosed. The power source is in communication with a controller, which is configured to determine the temperature of the power source and compare the temperature of the power source to a predetermined threshold temperature. The controller is configured to disable power source braking if the temperature of the power source is less than the threshold temperature. The controller is further configured to determine the power source speed and the travel speed of the machine, and disable power source braking if the power source speed and machine travel speed are less than predetermined thresholds.

Abstract: A transmission with a rotation speed determining device includes a rotation speed indicator (21) connected in a rotationally fixed manner to a transmission shaft (3) and a stationary rotation speed sensor (22) such that the rotation speed of the transmission shaft can be determined from the rotation speed indicator. The rotation speed indicator extends radially outward into at least one guide (33, 35) which reduces the axial play of the rotation speed indicator. With this transmission, the rotation speed of the transmission shaft can be determined particularly reliably.

Abstract: An engine rotational speed determining device is disclosed which includes a signal inputting means and a rotational speed determining means. The signal inputting means inputs a signal that indicates current supplied to an electric motor, which starts an internal combustion engine, during a starting operation of the engine by the motor. The rotational speed determining means determines a rotational speed of the engine in the starting operation based on a change in the current indicated by the signal input by the signal inputting means.

Abstract: A level adjusting circuit which adjusts input pulses from an antenna to a level suitable for determining the number of engine revolutions, is connected in a circuit that connects the antenna with a determining circuit. An optimum adjustment of the determination level by manual operation allows the pulses inputted to the determining circuit to be precisely determined at all times.

Abstract: The internal combustion engine system of the invention calculates a time constant of a high pass filter for eliminating a resonance component of a damper as a distortional element from a rotation speed of an engine, and sets the high pass filter with computation of a transfer function from the time constant. The set high pass filter is applied to a 30-degree rotation time representing a rotational variation of the engine to obtain a filtered 30-degree rotation time with elimination of the resonance component of the damper. The occurrence of an engine misfire is detected, based on a 30-degree rotation time difference and a misfire detection base difference computed from the filtered 30-degree rotation times. This arrangement ensures highly-accurate detection of the occurrence of a misfire in the engine constructed to output power via the damper as the distortional element, irrespective of the rotation speed of the engine.

Abstract: The invention relates to a method for producing a value T being representative of the mean engine torque generated on a crank-shaft of an internal combustion engine, comprising the steps of producing a speed vector including values being representative of instantaneous speeds of the engine during a sampling period, determining a mean engine speed n during said sampling period from the speed vector, determining a value Px, being representative of the frequency contribution of the speed vector at the frequency x*n, where x is a pre-selected order, and producing a value T being representative of the mean engine torque on the crankshaft during said sampling period, wherein T is derived from a mathematical expression including a polynomial having at least a term k*n*Px, where k is a polynomial constant. The invention also relates to a device for producing a value T.

Abstract: There is described a method for monitoring the load condition of a variable speed engine. Said method shows a determination of an actual speed and an actual load moment during operation. A warning signal is emitted when the actual load moment remains outside a monitoring range, predetermined depending on the speed, for the duration of a predetermined delayed reaction time.

Abstract: Inhibiting uncontrolled regeneration of a particulate filter fluidly coupled to an exhaust manifold of an internal combustion engine may comprise reducing an oxygen concentration of exhaust gas supplied to the particulate filter if active regeneration of the particulate filter is in progress and rotational speed of the engine speed thereafter drops to an idle speed range from an elevated rotational speed that is greater than the idle speed range. Reducing the oxygen concentration of the exhaust gas supplied to the particulate filter may include any one or combination of reducing the oxygen concentration of intake air supplied to the intake manifold, reducing the air portion of the air-to-fuel ratio of the air-fuel mixture supplied to the engine and removing oxygen from the exhaust gas supplied to the particulate filter.