Abstract: A CPU determines that there is a misfire when a relative magnitude of a rotation fluctuation amount ?T30[0] related to a cylinder subject to the determination in relation to a rotation fluctuation amounts ?T30[4] of the previous combustion cycle is greater than or equal to the determination value ?th. However, during the execution of a catalyst warm-up process, the CPU uses, in the comparison, the relative magnitude of the rotation fluctuation amount ?T30[0] in relation to the average ?T30ave[0] of the smallest five of the rotation fluctuation amounts ?T30[4] to ?T30[40] from the past ten combustion cycles.

Abstract: A misfire detection device for an internal combustion engine is provided. A mapping takes time series data of instantaneous speed parameters as inputs. Each instantaneous speed parameter corresponds to one of a plurality of successive second intervals in a first interval. The instantaneous speed parameters correspond to the rotational speed of the crankshaft. The first interval is a rotational angular interval of the crankshaft in which compression top dead center occurs. The second interval is smaller than an interval between compression top dead center positions. The mapping outputs a probability that a misfire has occurred in at least one cylinder that reaches compression top dead center in the first interval. The mapping data defining the mapping has been learned by machine learning.

Abstract: A method for detecting combustion irregularities in an internal combustion engine unit coupled to an electric propulsion unit of a hybrid motor vehicle having a management unit, consisting in intermittently measuring a pair of values P, ? that are respectively representative of the value P of the power consumed by the electric engine and of the value ? of the speed of the combustion engine, in comparing each pair of measured values P, ? with a pair of theoretical values Pth, ?th corresponding to the setpoint data delivered by the management unit, and, when there is a lack of correspondence between at least one of the measured values P, ? and the associated theoretical value Pth, ?th, triggering a synchronization procedure intended to determine the phasing of the internal combustion engine.

Abstract: To provide a controller and a control method for an internal combustion engine capable of performing automatic adaptation of the optimal ignition timing or the optimal control value of the combustion operation mechanism during operating. A controller and a control method for an internal combustion engine changes setting values of a torque characteristics function so that an output torque calculated using the torque characteristics function approaches an output torque calculated based on an actual value of internal cylinder pressure; calculates a plurality of output torques corresponding to respective plurality of combustion control states using the torque characteristics function; and changes setting values of a combustion control target setting function so that a target value of combustion control state calculated using the combustion control target setting function approaches a maximum torque combustion control state where the output torque becomes the maximum.

Abstract: To provide a controller and a control method for an internal combustion engine capable of performing automatic adaptation of the optimal ignition timing or the optimal control value of the combustion operation mechanism during operating. A controller and a control method for an internal combustion engine changes setting values of a torque characteristics function so that an output torque calculated using the torque characteristics function approaches an output torque calculated based on an actual value of internal cylinder pressure; calculates a plurality of output torques corresponding to respective plurality of combustion control states using the torque characteristics function; and changes setting values of a combustion control target setting function so that a target value of combustion control state calculated using the combustion control target setting function approaches a maximum torque combustion control state where the output torque becomes the maximum.

Abstract: An object is to provide an industrial vehicle whereby it is possible to arrange an exhaust purifying apparatus in an efficient layout, and to achieve a high purifying performance. An industrial vehicle includes: a cargo loading device disposed on a front part of a vehicle; a counter weight disposed on a rear part of the vehicle; an engine housed in an engine room formed in front of the counter weight inside the vehicle; and an exhaust purifying device disposed inside the engine room and configured to purify exhaust gas of the engine.

Abstract: Disclosed is a method for determining the engine torque delivered by a multi-cylinder engine, including the following steps: determining the angular velocity of the crankshaft and measuring the cylinder pressure over an angular window of combustion in a first cylinder fitted with a cylinder pressure sensor; calculating the value of the engine torque (TQIref) in this window; determining a current transfer function for the learning of the torque, so as to estimate the torque TQImdl(cyl)) in a second cylinder not fitted with a cylinder pressure sensor, from the product of: the engine torque calculated over the angular window of the first cylinder, a ratio between: the angular velocity of the crankshaft over an angular window of combustion of the second cylinder, and the angular velocity of the crankshaft over the window of combustion of the first cylinder.

Abstract: To provide a controller and a control method for an internal combustion engine capable of estimating the cylinder internal pressure of the combustion cylinder accurately in consideration of the torsional vibration of the crankshaft. A controller for an internal combustion engine includes a torsional torque calculator that calculates a value which has an amplitude of the maximum value of torsional vibration torque calculated based on a crank angle acceleration in the combustion period, and vibrates with a preliminarily set natural angular frequency, as a torsional vibration torque in the combustion period; and a cylinder internal pressure estimator that calculates a combustion gas pressure torque, by use of the equation of motion of the rotation system of the crankshaft, based on the crank angle, the crank angle acceleration, and the torsional vibration torque, and estimates the cylinder internal pressure of the combustion cylinder based on the combustion gas pressure torque.

Abstract: Various methods and systems are provided for diagnosing an engine component based on a measured engine speed during an engine shutdown event. As one embodiment, a method for an engine includes measuring an engine speed drop rate, via an engine speed sensor, during an engine shutdown event; and indicating a change in performance of one of the engine speed sensor or an additional engine component in response to the measured engine speed drop rate deviating from a reference engine speed drop rate by a pre-set or pre-defined threshold rate.

Abstract: Disclosed is a method of testing a vehicle having a fifth wheel and an apparatus for restraining the vehicle. The method of testing the vehicle may include moving the vehicle on a dynamometer and inserting a coupling structure into the fifth wheel to secure the vehicle during a test. In accordance with example embodiments, the apparatus may include a boom having a pin connection and a connecting structure arranged at an end of the boom, the connecting structure being configured to couple to the fifth wheel of the vehicle.

Abstract: A method is provided for monitoring torques, including the following steps in a first processing unit: Receiving a delta torque; in a first calculating process, calculating a first setpoint torque and a second setpoint torque from the delta torque; in a second calculating process, checking whether a difference of the first setpoint torque and of the second setpoint torque is less than, or equal to the delta torque, the second calculating process being carried out independently of the first calculating process; and output of the first setpoint torque and the second setpoint torque, only if the difference of the first and the second setpoint torque is less than, or equal to the delta torque.

Abstract: An electronic screw with an electronic torque display is disclosed. The screw includes a body and a torque sensing element. The body has a threading head, a shank connected to the threading head and a recess located on the side wall of the shank. The torque sensing element is disposed in the recess and detected the torque value of the electronic screw. The torque sensing element is electrically connected to the electronic torque display, wherein the electronic torque display displays the torque value that detected from the torque sensing element.

Abstract: The disclosure relates to a method and apparatus of measuring torque. The method and apparatus entails measuring the torque generated by an automobile engine using a torque sensor replacing the driver side engine mount. A spring component of the torque sensor tares the weight of the engine and a hydraulic pressure gauge measures the lifting forces acting on a pressure receiver of the torque sensor.

Abstract: The disclosure relates to a method and apparatus of measuring torque. The method and apparatus entails measuring the torque generated by an automobile engine using a torque sensor replacing the driver side engine mount. A spring component of the torque sensor tares the weight of the engine and a hydraulic pressure gauge measures the lifting forces acting on a pressure receiver of the torque sensor.

Abstract: Systems and methods for learning torque estimate errors and updating torque estimation models are presented. In one example, torque errors are learned during an engine shut-down, after a disconnect clutch coupled between an engine and an electric machine has been released. An updated torque estimation model is then used to control torque during subsequent engine operation to improve drive feel and vehicle performance.

Abstract: A device for measuring torque of an engine has a torque detecting section for detecting an output torque of engine cylinders, a rotation detecting section for detecting a rotation angle of a rotating section to which a piston of each cylinder is connected, a top mark detecting section for detecting the rotation angle of the piston of each cylinder, and a torque calculating section for estimating torque characteristics of each cylinder on the basis of the following: the signal of the output torque, the rotation angle of the rotating section, the rotation angle of the piston of each cylinder, the number of the cylinders of the engine, and the number of cycles of the engine. The torque calculating section estimates, as torque characteristics of each cylinder, either peak torque of each cylinder or the combustion angle at which the peak torque is attained.

Abstract: A hybrid powertrain includes an engine, an electric machine, and a transmission. A method to control the powertrain includes monitoring operation of the powertrain, determining whether conditions necessary for growl to occur excluding motor torque and engine torque are present, and if the conditions are present controlling the powertrain based upon avoiding a powertrain operating region wherein the growl is enabled.

Abstract: A method is disclosed for monitoring the state of a piezoelectric injector of the fuel injection system of an internal combustion engine, the piezoelectric injector having a piezoelectric actuator and a nozzle needle that can be moved by said piezoelectric actuator. The piezoelectric injector can be operated in a partial-stroke mode and a full-stroke mode. In the partial-stroke mode, the curve of an electrical parameter over time is recorded, the maximum value of the curve is determined, a constant parameter value that arises after the presence of the maximum value is determined, the duration between the presence of the maximum value and the reaching of the constant parameter value is determined, the difference between the maximum value and the constant parameter value is determined, and conclusions about the state of the piezoelectric injector are drawn on the basis of the determined duration and the determined difference.

Abstract: An engine control system includes an engine that outputs a rotation of a crankshaft through a torsional damper; a calculation portion that calculates a value of engine torque based on an angular acceleration of the crankshaft and a moment of inertia of the crankshaft; and a correction portion that calculates a correction value based on a torsional angle of the torsional damper, and corrects the calculated value of the engine torque using the correction value.

Abstract: A fuel injector diagnostic is disclosed. In one example, the diagnostic can determine if that amount of fuel injected or the timing of start of injection is degraded. Thus, the fuel injector diagnostic method can distinguish between different types of injector degradation.

Abstract: Methods and systems are provided for an engine. A condition of the engine may be diagnosed based on a combustion torque profile of the engine estimated using signals from a generator operationally connected to the engine and/or other signals associated with the engine. Different types of degradation may be distinguished based on discerning characteristics within the estimated combustion torque profile data. Thus, a degraded engine component may be identified in a manner that reduces service induced delay.

Abstract: A method and a device for performing tests on an internal combustion engine or a structure which is associated with the engine by measuring output parameter values on at least one output shaft (3LF, 3RF) which is connected to the engine, is distinguished by producing a representation of variations in said output parameter values during operation of the engine, and evaluating the representation for determining an operating parameter value for the engine or the structure. The invention also concerns a dynamometer testing rig.

Abstract: The power of internal combustion engines is conventionally determined on special power-test stands on which all connections, in particular coolant connections, of the engine must be fitted. In particular, if a cold test of the internal combustion engine is carried out beforehand, it is necessary for said internal combustion engine to be dismounted from the cold-test stand and mounted on the power-test stand, which is time-consuming. The invention indirectly predetermines the power of the internal combustion engine during the cold test. In this way, the determination of the power can be carried out on the cold-test stand without the need for a power-test stand or for the internal combustion engine to be mounted thereon.

Abstract: An ECU executes a program including: a control to advance or retard the fuel injection timing by a prescribed value; determining whether the torque output variation of an engine exceeds a threshold torque output variation; and determining the fuel injection timing to be abnormal if the torque output variation of the engine is equal to or below the threshold torque output variation.

Abstract: A fuel injector diagnostic is disclosed. In one example, the diagnostic can determine if that amount of fuel injected or the timing of start of injection is degraded. Thus, the fuel injector diagnostic method can distinguish between different types of injector degradation.

Abstract: A method for operating an internal combustion engine for a motor vehicle, in which a first signal is determined, which characterizes a torque of the internal combustion engine. In order to provide a method for operating an internal combustion engine for a motor vehicle in which a torque of the internal combustion engine is determined even more precisely, in particular in the region of a zero crossing of the torque, a second signal, which characterizes a state variable of the internal combustion engine and/or the motor vehicle that differs from the torque is determined from the first signal, at least one third signal is recorded, which characterizes a measured value of the state variable, the second signal and the third signal are compared to one another, and the first signal is corrected on the basis of the comparison.

Abstract: The power of internal combustion engines is conventionally determined on special power-test stands on which all connections, in particular coolant connections, of the engine must be fitted. In particular, if a cold test of the internal combustion engine is carried out beforehand, it is necessary for said internal combustion engine to be dismounted from the cold-test stand and mounted on the power-test stand, which is time-consuming. The invention indirectly predetermines the power of the internal combustion engine during the cold test. In this way, the determination of the power can be carried out on the cold-test stand without the need for a power-test stand or for the internal combustion engine to be mounted thereon.

Abstract: An angular velocity/angular acceleration calculator of the crankshaft in an internal combustion engine includes a crank angle detection device, a crank angle correction device, and an angular velocity/angular acceleration calculation device. The crank angle detection device detects a crank angle in the internal combustion engine and a time at the crank angle. The crank angle correction device corrects the crank angle and the time thus detected to an equiangular crank angle and a time corresponding thereto. The angular velocity/angular acceleration calculation device calculates an angular velocity and an angular acceleration of the crankshaft by converting a function of the time with respect to the crank angle that are corrected by the crank angle correction device so as to be regarded as a periodic function, and utilizing the discrete Fourier transform of the converted function.

Abstract: A device for measuring torque of an engine has a torque detecting section for detecting an output torque of engine cylinders, a rotation detecting section for detecting a rotation angle of a rotating section to which a piston of each cylinder is connected, a top mark detecting section for detecting the rotation angle of the piston of each cylinder, and a torque calculating section for estimating torque characteristics of each cylinder on the basis of the following: the signal of the output torque, the rotation angle of the rotating section, the rotation angle of the piston of each cylinder, the number of the cylinders of the engine, and the number of cycles of the engine. The torque calculating section estimates, as torque characteristics of each cylinder, either peak torque of each cylinder or the combustion angle at which the peak torque is attained.

Abstract: The invention utilizes the firing order of the cylinders within the engine to identify the cylinder or cylinders that mainly contribute or, alternatively, contribute as little as possible to the production of certain harmonic frequencies in the engine's torque. In order to use the engine's torque for this purpose, the calculation of torque must take into account the non-linearities of the engine system. Thus the calculation of torque takes into account not only the properties of the engine but also the properties of the load and the shaft.

Abstract: An exhaust gas recirculation distribution variation sensing device has a torque sensing section that senses instantaneous torque caused with combustion of fuel injected from an injector for each cylinder, an injection quantity sensing section that senses an actual injection quantity of the injected fuel for each cylinder, and an exhaust gas recirculation distribution variation calculating section that calculates an exhaust gas recirculation distribution variation as a distribution variation of recirculated exhaust gas to respective cylinders based on a variation in the torque sensing value of the torque sensing section among the cylinders (i.e., a torque variation) and a variation in the injection quantity sensing value of the injection quantity sensing section among the cylinders (i.e., an injection quantity variation).

Abstract: A control system for a vehicle having first and second wheels is provided that includes a differential apparatus adapted to distribute torque between the first and second wheels and a traction controller for controlling operation of the differential apparatus from vehicle launch up to a predetermined vehicle speed. The traction controller is configured to engage the differential apparatus in a first operating state according to at least one vehicle operating parameter indicative of a low traction operating condition and to further control engagement of the differential apparatus in a second vehicle operating state during the low traction operating condition according to a difference between an actual vehicle yaw rate and a predetermined target vehicle yaw rate. The control system also includes a stability controller for controlling engagement of the differential apparatus at or above the predetermined vehicle speed.

Abstract: Operating an engine includes monitoring engine crank position, a corresponding engine torque, and an engine operating point. A state of an engine control parameter is adjusted in response to a difference between an identified location of peak torque and a preferred location of peak torque.

Abstract: A crankshaft of an engine is connected to a carrier shaft of a planetary gear via a damper. The damper includes a torsion member generating elastic force for suppressing relative rotation, when the crankshaft and the carrier shaft are relatively rotated. A control unit estimates engine torque with using rotation angular acceleration of the crankshaft calculated from a detected value of an engine speed sensor, and corrects the estimated engine torque with a correction term of the elastic force of the damper calculated based on a damper torsional angle. Then, the control unit diagnoses an abnormality of the engine based on the estimated engine torque after correction.

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: An internal combustion engine torque estimation device that accurately estimates the torque of an internal combustion engine without being affected by engine speed changes. A reference signal, which is output at predetermined rotation angle intervals of a crankshaft for the engine, is acquired. In accordance with the reference signal, the amount of change in the rotation speed of the crankshaft is acquired as a rotational fluctuation. A filtering process is performed on the rotational fluctuation in synchronism with reference signal output timing to extract a frequency component synchronized with a combustion cycle of the engine. The torque of the engine is estimated in accordance with the extracted frequency component.

Abstract: A process quantity measurement method with which an engine output is accurately measured in a relatively simple manner. Torque of an engine is measured based on the amount of torsion of the output shaft of the engine, and an engine output is obtained based on the measured torque. On the other hand, an engine output is calculated based on input and output heat quantity, and a difference between the engine output based on the torque and the engine output based on the input and output heat quantity is obtained in advance. When the engine is operated, the previously obtained difference is added to the engine output that is based on the calculated input and output heat quantity to obtain the engine output.

Abstract: A method for estimating pump torque of a computer-controlled fuel injection heat engine for a motor vehicle. The method determines the pumping torque in a for of a relative pumping torque representative for total pumping torque contribution of an intake and exhaust valve system, wherein the relative pumping torque is determined by a relation factoring in engine cubic capacity, a pressure difference, an exhaust pressure differential estimation due to the presence of the exhaust valves, and an intake pressure differential estimation due to the presence of the intake valves.

Abstract: An angular velocity/angular acceleration calculator of the crankshaft in an internal combustion engine includes a crank angle detection device, a crank angle correction device, and an angular velocity/angular acceleration calculation device. The crank angle detection device detects a crank angle in the internal combustion engine and a time at the crank angle. The crank angle correction device corrects the crank angle and the time thus detected to an equiangular crank angle and a time corresponding thereto. The angular velocity/angular acceleration calculation device calculates an angular velocity and an angular acceleration of the crankshaft by converting a function of the time with respect to the crank angle that are corrected by the crank angle correction device so as to be regarded as a periodic function, and utilizing the discrete Fourier transform of the converted function.

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 operating an internal combustion engine, in which fuel is injected using an injection device into a combustion chamber of a cylinder of the internal combustion engine, a fuel quantity to be injected being ascertained as a function of individual properties of the injection device, and in which functional monitoring is performed, in which an actual torque is ascertained on the basis of performance quantities of the internal combustion engine and monitored for a deviation from a permissible torque. The individual properties of the injection device are taken into consideration when ascertaining the actual torque, where the functional monitoring is improved.

Abstract: An engine test system includes a base constructed and arranged to reside at a fixed location. The system further includes an engine support member constructed and arranged to concurrently support an engine and move relative to the base. The system further includes a linear transducer having (i) a first portion supported by the base, (ii) a second portion supported by the engine support member, and (iii) a circuit adjacent the first and second portions. The circuit is constructed and arranged to provide a linear transducer signal identifying an amount of linear compression and/or tension between the engine support member and the base along a predefined direction. When the linear transducer resides at a break in station, such an embodiment provides a simple, low cost mechanism which is capable of providing a horsepower measurement for every engine passing through the break in station.

Abstract: A cylinder characteristic variation sensing device has a small injection controlling section that performs small injections sequentially in respective cylinders, a torque increase amount sensing section that senses an increase amount of output torque caused in connection with the small injection for each cylinder, an injection quantity sensing section that senses an actual injection quantity of the small injection for each cylinder, and a cylinder characteristic variation calculating section that calculates a variation in a cylinder characteristic among the cylinders (i.e., a cylinder characteristic variation) based on a variation in the sensing value of the injection quantity sensing section among the cylinders (i.e., an injection quantity variation) and a variation in the sensing value of the torque increase amount sensing section among the cylinders (i.e. a torque increase amount variation).

Abstract: An exhaust gas recirculation distribution variation sensing device has a torque sensing section that senses instantaneous torque caused with combustion of fuel injected from an injector for each cylinder, an injection quantity sensing section that senses an actual injection quantity of the injected fuel for each cylinder and an exhaust gas recirculation distribution variation calculating section that calculates an exhaust gas recirculation distribution variation as a distribution variation of recirculated exhaust gas to respective cylinders based on a variation in the torque sensing value of the torque sensing section among the cylinders (i.e., a torque variation) and a variation in the injection quantity sensing value of the injection quantity sensing section among the cylinders (i.e., an injection quantity variation).

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: An internal combustion engine torque estimation device that accurately estimates the torque of an internal combustion engine without being affected by engine speed changes. A reference signal, which is output at predetermined rotation angle intervals of a crankshaft for the engine, is acquired. In accordance with the reference signal, the amount of change in the rotation speed of the crankshaft is acquired as a rotational fluctuation. A filtering process is performed on the rotational fluctuation in synchronism with reference signal output timing to extract a frequency component synchronized with a combustion cycle of the engine. The torque of the engine is estimated in accordance with the extracted frequency component.

Abstract: A control module comprising a cylinder torque determination module that determines an indicated torque for a cylinder in an engine based on a pressure in the cylinder, a cylinder torque balancing module that determines a derivative term for the cylinder based on rotation of a crankshaft, and a cylinder pressure error detection module that detects a pressure error for the cylinder based on the indicated torque and the derivative term. A method comprising determining an indicated torque for a cylinder in an engine based on a pressure in the cylinder, determining a derivative term for the cylinder based on rotation of a crankshaft, and detecting a pressure error for the cylinder based on the indicated torque and the derivative term.

Abstract: A crankshaft of an engine is connected to a carrier shaft of a planetary gear via a damper. The damper includes a torsion member generating elastic force for suppressing relative rotation, when the crankshaft and the carrier shaft are relatively rotated. A control unit estimates engine torque with using rotation angular acceleration of the crankshaft calculated from a detected value of an engine speed sensor, and corrects the estimated engine torque with a correction term of the elastic force of the damper calculated based on a damper torsional angle. Then, the control unit diagnoses an abnormality of the engine based on the estimated engine torque after correction.

Abstract: An engine control device controls an engine of a motor vehicle. The engine control device predefines an admissible engine torque on the basis of a torque envelope curve in dependence on an accelerator pedal position and an engine speed. The engine control device is connected to a diagnostic device. An intervention variable, that represents an engine torque and/or an engine speed and on the basis of which the engine can be actuated for test/diagnostic purposes, can be predefined for the engine control device by the diagnostic device. When at least one test criterion is fulfilled in the engine control device and/or the diagnostic device, the torque envelope curve of the engine control device can be widened or bypassed for test/diagnostic purposes in such a way that given an unactivated accelerator pedal for a defined engine torque at the request of the diagnostic device a larger engine torque is admissible.