A method for extracting characterizing features from an ion current trace retrieved from spark plugs of cylinders of an internal combustion engine, comprises the steps of: i. dividing the ion current signal into crank angle subintervals; ii. calculating a measure of ion current in each crank angle subinterval; and iii. Performing a calculation on the measure of ion currents from different subintervals such that the result of the calculation is dimension free. Further it relates to a method of monitoring combustion processes where a plurality of ion current signals from a number of spark plugs (4A, 4B) are retrieved and used in combination.

A method for extracting characterizing features from an ion current trace retrieved from spark plugs of cylinders of an internal combustion engine, comprises the steps of: i. dividing the ion current signal into crank angle subintervals; ii. calculating a measure of ion current in each crank angle subinterval; and iii. Performing a calculation on the measure of ion currents from different subintervals such that the result of the calculation is dimension free. Further it relates to a method of monitoring combustion processes where a plurality of ion current signals from a number of spark plugs (4A, 4B) are retrieved and used in combination.

The purpose of the present invention is to provide a device for controlling a dynamometer of a test system, wherein the device is capable of controlling shaft torque to a prescribed target torque while minimizing low-frequency-range resonance caused by viscous drag of a test piece. This test system is provided with a dynamometer joined to an engine via a coupling shaft, an inverter for supplying electric power to the dynamometer, a shaft torque meter for detecting the shaft torque produced in the coupling shaft, and a dynamometer-controlling device 6 for generating a torque-current command signal T2 that is sent to the inverter and is generated on the basis of a shaft torque detection signal T12 from the shaft torque meter. The dynamometer-controlling device 6 is provided with an integrator 62 for integrating the difference between the shaft torque detection signal 12 and a shaft torque command signal T12ref, and a phase lead compensator 63 for accepting an output signal from the integrator 62 as an input and performing a phase lead compensation process that uses constants (a1, b1) that are dependent on the viscous drag of the test piece. An output signal from the phase lead compensator 63 is used to generate the torque-current command signal T2.

A method for extending thermodynamic turbine mapping of a turbocharger, the turbocharger including a turbine and a compressor, the method including the steps of providing a steady-state turbocharger gas test stand configured to flow continuous gas to the turbocharger, the test stand including a throttle device disposed upstream of an inlet of the compressor of the turbocharger, and varying an area of the inlet with the throttle device to change density of the continuously flowing gas at the inlet of the compressor and establish a choked-flow condition for extending the thermodynamic turbine mapping of the turbocharger.

A method for extending thermodynamic turbine mapping of a turbocharger, the turbocharger including a turbine and a compressor, the method including the steps of providing a steady-state turbocharger gas test stand configured to flow continuous gas to the turbocharger, the test stand including a throttle device disposed upstream of an inlet of the compressor of the turbocharger, and varying an area of the inlet with the throttle device to change density of the continuously flowing gas at the inlet of the compressor and establish a choked-flow condition for extending the thermodynamic turbine mapping of the turbocharger.

A system includes a computer including a processor and a memory, the memory storing instructions executable by the processor to actuate a windshield wiper on a vehicle, collect amplitude data and frequency data from a sound of the windshield wiper, and, upon determining that the amplitude data meets a first predetermined threshold and the frequency data meets a second predetermined threshold, actuate a vehicle component to move the vehicle to a specified location.

Method and apparatus are disclosed for detecting and mitigating vehicle battery gas emission into the vehicle cabin. An example vehicle includes a battery, a vent tube coupled to the battery for venting gas outside a vehicle cabin, a gas flow sensor for determining a measured flow rate at an end of the vent tube opposite the battery, and a processor. The processor is configured for determining an expected flow rate range based on a battery characteristic, and responsive to determining that the measured flow rate is outside the expected flow rate range, initiating a protective action.

An apparatus and method for accurately estimating the transfer torque of an engine clutch provided between an engine and a motor in a hybrid electric vehicle, may include a forward estimation device configured for determining a first estimate of engine clutch transfer torque using engine torque information, a reverse estimation device configured for determining a second estimate of the engine clutch transfer torque using a drive system model including wheels, a transmission, and a motor and using wheel speed information, a weight determination device configured for determining a weight based on brake input by a driver and whether predetermined devices in the vehicle are operated, and an estimate combination determination device configured for determining a final estimate of the engine clutch transfer torque as a value combined by applying a weight to the determined first estimate and the determined second estimate.

A misfire detection device for an engine having cylinders includes: a crank angle detector that detects an angular position of a crankshaft; a rotational speed calculator that calculates a rotational speed of the crankshaft on the basis of an output from the crank angle detector; and a misfire detector that obtains a difference between a rotational speed of the crankshaft in a combustion process in a diagnosis target cylinder and a rotational speed of the crankshaft in a combustion process in a last cylinder whose ignition order is immediately before the diagnosis target cylinder, and carries out a misfire detection by using a diagnostic value set on the basis of the difference.

An electronic control unit diagnoses leakage abnormality in an intake system downstream from a supercharger provided in the intake system of the engine. The electronic control unit sets, as a supercharging region monitoring value, a ratio between a first air amount obtained from a detection value of an air flowmeter and a second air amount obtained from a detection value of an intake pressure sensor, the ratio being the ratio obtained when the engine is operated in a supercharging region. The electronic control unit also sets, as a non-supercharging region monitoring value, a ratio obtained when the engine is driven in a non-supercharging region. The electronic control unit determines the presence of the leakage abnormality in the intake system when the ratio of the supercharging region monitoring value to the non-supercharging region monitoring value is larger than a predetermined specified value.