72results about "Electrical control" patented technology

A variable displacement internal combustion engine having selectively disabled cylinders, the engine including two turbochargers each having a turbine and a compressor, an exhaust system connecting the turbines of both turbochargers to all the engine cylinders, and valving within the exhaust system for selectively directing exhaust gases to flow through one, the other or both turbocharger exhaust turbines, the valving being controlled in dependence upon the number of deactivated cylinders.

An engine controller determines the cost of operating a combustion engine and the cost of operating an emissions after-treatment device. Accordingly, the engine controller adjusts parameters for operation of the engine and the after-treatment device to ensure cost-effective use of the engine and the after-treatment device while complying with exhaust emissions requirements. In particular, the engine controller receives the price of fuel consumed by the engine and the price of reductant used by the after-treatment device to determine the respective cost of operation. Specifically, the fuel is diesel fuel used in a diesel engine; the reductant is urea use in a urea-based Selective Catalytic Reduction (SCR) system; and the regulated exhaust emissions is nitrogen oxide (NOx) emissions. The engine operating parameters may include cooled exhaust gas recirculation airflow, fuel injection timing, fuel injection pressure, and air-to-fuel ratio. The SCR system operating parameters may include the volume of urea injected.

The invention discloses a system optimization method and device of ship operation energy efficiency. The method comprises the steps of data acquisition, mathematical model establishment, analysis and calculation, output and execution; namely, acquiring speed over water and speed over ground of the ship, real-time rotating speed and instant oil consumption of ship main engine; when the ship is in much deeper water, establishing a mathematical model between the real-time rotating speed of the ship main engine and the ship speed over water and a mathematical model between the real-time rotating speed of the ship main engine and the instant oil consumption of the ship main engine; analyzing and calculating the mathematical models under different water flow velocities and different main engine rotating speeds to obtain the ship kilometer oil consumption valves of the ship corresponding to different conditions; displaying the ship kilometer oil consumption value and the corresponding main engine rotating speed to guide the operation. The method also includes a ship technical state judging and navigation operating optimizing method. The device comprises a central processer and a memory thereof, a data acquisition equipment, man-machine conversation equipment, output equipment, a power supply unit and the like.

A fuel system for an engine has a source of pressurized fuel, a rail, and a plurality of fuel injectors. The fuel system also has a sensor to sense a parameter of the pressurized fuel, and a controller. The controller is configured to generate a flow control offset value indicative of a difference between the value of the parameter and a desired value for the parameter, and to control operation of the source in response to the flow control offset value when the sensor is determined to be functioning properly. The controller is also configured to store the flow control offset value in a memory of the controller when the sensor is determined to be functioning properly and to associate the flow control offset value with at least one operating condition of the engine. The controller is further configured to control operation of the source in response to previously stored flow control offset value when the sensor is determined to be malfunctioning.

Providing an injector driving control apparatus that operates with minimum power consumption while ensuring linearity (proportionality between the current supply duration and fuel injection volume of the injector) in a wide fuel pressure range. Providing a coil current feedback circuit and controlling the current feedback duration according to fuel pressure after applying the current at a boost voltage. The present invention enables optimal control of the injector and hence, the improvement of its fuel injection volume characteristics (linearity) and the reduction of the heat generated in the injector driving control circuits.

An apparatus and method for determining a parameter related to fuel consumption in an engine are disclosed. An electrical sensor senses an electrical control signal used to control fuel introduced into the engine, such as by controlling a valve or fuel injector of the engine. The electrical sensor generates a measurement signal that is indicative of an electrical parameter such as frequency or voltage of the electrical control signal. A processor receives the measurement signal and uses the measurement signal to determine the parameter related to fuel consumption. The parameter can be volume of fuel consumed, fuel consumption rate, fuel efficiency or other related parameter.

A detection device for internal combustion engines exhaust gases post-treatment systems has a casing (2, 3) housing a circuit arrangement (21, 31) including humidity sensor means (32), for measuring the humidity of the gas. The circuit arrangement further comprises temperature sensor means (33) and pressure sensor means (22), for detecting a gas temperature value and a gas pressure value, respectively. The gas temperature value can be used for compensating the humidity value obtained through the humidity sensor means (32) and the pressure value can be used for deducing the clogging degree of a filter of the post-treatment system. Preferably the pressure sensor means (22) are housed in a first chamber (8) of the casing (2-3) while the humidity sensor means (32) and the temperature sensor means (33) are housed in a second chamber (10b) of the casing (2, 3).

The circuit contains a single processing circuit, it receives the control pulse. A from the electronic control unit of the motor and output high voltage driving pulse Ah and low voltage driving pulse Al to higher extreme driving circuit separately and receive the feedback sampling current signal from lower extreme driving circuit, after processing, the low voltage driving pulse Al adjust the higher extreme driving circuit to adjust the driving circuit of the electromagnetic valve. Lower extreme driving circuit receive pulse signal B from electronic control unit of the motor, this pulse signal is same with the control signal A.

The purpose of the present misfire detector is to prevent catalysts from being heated to high temperatures, thereby avoiding detriment or damage of the catalysts. The misfire detector for a multi-cylinder engine includes (1) a fuel cut control for misfire cylinders by a fuel cut means to stop supplying the fuel to the misfire cylinders, (2) a control to prevent a fuel feed back control and a fuel leaning control and to initialize the correction values of both the fuel feed back control and the fuel leaning control, and (3) a retard control to retard the ignition timing by a retard quantity set based on the extent the misfire occurs or the air-fuel ratio. The above control (3) can be replaced by a throttle opening control for misfire to limit the throttle opening angle as compared to a normal opening in accordance with the acceleration degree. The above control (3) can also be replaced by an engine speed control to limit the engine speed below a predetermined engine speed irrespective of the opening degree of the acceleration. Further, the above control (3) can be replaced by a vehicle speed control to limit the vehicle speed below a predetermined speed irrespective of the opening degree of the acceleration.

A method for operating an engine having at least one cylinder that may be deactivated and a fuel system operating with an alcohol fuel blend, comprising of adjusting a range of operating parameters in which the at least one cylinder is deactivated, where said range is adjusted as the alcohol blend of the fuel varies.

The vibration damping control device which performs damping of vibration of a vehicle body through a driving output control of a diesel vehicle in accordance with the present invention comprises a compensation component computing portion which computes a compensation component which compensates a wheel torque to suppress an amplitude of vehicle body vibration; and a control gain determining portion which determines a control gain for the compensation component, wherein, at a time point of reversion of the sign of the value of the compensation component, the control gain determining portion decreases the control gain when, before that time point, the value of the compensation component has deviated from a restriction range for variation of a fuel injection quantity determined based on engine operational condition, and increases the control gain when the value of the compensation component has not deviated from a restriction range for variation of a fuel injection quantity. Thereby, in the execution of the restriction of the fuel injection quantity variation, the wave form of the compensation component of the vibration damping control is maintained, and also, the effect of the vibration damping control becomes as large as possible.

Method and arrangement for controlling actual torque in a driveline of a land-based motor vehicle. Taking a direct, non-predictive measure of actual torque induced in the driveline of the motor vehicle and ascertaining a magnitude thereof. Ascertaining a magnitude of a torque demand being requested to be instituted in the driveline. Comparing the ascertained magnitude of the direct, non-predictive measure of actual torque taken is compared with a driveline-configuration dependent maximum torque threshold; in this way, an over-threshold torque condition is ascertained in the driveline based thereupon if such a condition exists. In multi-geared transmissions, the variability can be accounted for through the engagement of different ratio gears. In the event that such an over-threshold torque condition is detected, at least one of several possible over-threshold torque compensating effects will be applied to reduce or diminish the excessive portion of the torque. The remedial measure may be chosen from several possibilities including reconfiguring the variable ratio transmission and/or reducing powerplant-induced driveline torque.

The invention relates to a method for controlling a group of glow plugs for a diesel engine, which are connected to a direct current supply by individual supply lines and operat by a pulse width modulation method in any case at the same temperature in the time average. The inventive method consists in calculating the electric resistance of the glow plugs, in subtracting the resistance of the plug glowing element supply line therefrom during the engine operation for calculating a relative pulse width with which the glow plugs are controlled or in determining for each glow plug the resistance of the glowing element thereof during the engine operation, thereby making it possible to calculate the individual relative pulse width for individually controlling each glow plug or also to determine the electric energy supplied by period to the glow plugs by means of the pulse width modulation.

Operating a self-igniting internal combustion engine includes: specifying a setpoint combustion position and a setpoint combustion noise feature; operating at least one cylinder of internal combustion engine for at least one cycle while maintaining a first injector control variable and/or an air valve control variable and a second injector control variable and/or a second air valve control variable; ascertaining actual combustion position and actual combustion noise feature of the at least one cylinder; comparing the actual combustion position to the setpoint combustion position and, in case the actual combustion position deviates from the setpoint combustion position, determining anew the first injector control variable and/or the air valve control variable; and comparing the actual combustion noise feature to the setpoint combustion noise feature and, in case the actual combustion noise feature deviates from the setpoint combustion noise feature, determining anew the second injector control variable and/or the air valve control variable.

The automatic/stop restart device includes a restart control module for performing restart control for the internal combustion engine by pushing out a pinion gear (17) by a pinion-gear push-out device (18) to bring the pinion gear into meshing engagement with a ring gear (16) when the restart requirement is satisfied before the rotation of the internal combustion engine is stopped after an automatic stop requirement is satisfied. The pinion gear is pushed out when the restart requirement is satisfied when a rotation speed of the internal combustion engine is equal to or lower than a predetermined rotation speed. At the same time, a starter motor (19) is driven by a starter-motor waiting-time adjustment module for adjusting a driving waiting time for the starter motor (19) according to the rotation speed of the internal combustion engine obtained when the restart requirement is satisfied. In this manner, the restart is quickly performed.

When an operating state constituted of a rotation speed Ne and torque Te of an engine belongs in a resonance region in a post-stage including a damper connected to a crankshaft of the engine, a subtraction sine wave for removing an influence by resonance is calculated, and misfire is judged depending on whether or not a variation amount ΔF of a rotation speed F after processing, obtained by subtracting the calculated subtraction sine wave from a variation in 30-degree rotation speed N30 which is a rotation speed every time the crankshaft rotates by 30 degrees, is less than a threshold value Fref. Thereby, even when the operating state belongs in the resonance region, misfire can be judged more reliably and more accurately.

The invention provides a diesel-alternative fuel hybrid combustion engine control method without an electric oil pump rack actuating mechanism, belonging to the field of engine control. According to the invention, an exhaust temperature sensor, a wide-range oxygen sensor, a mixedly burning ratio information display screen, an alternative fuel injection controller, a high pressure diesel pump rack displacement sensor and an alternative fuel injector are additionally arranged on an original diesel engine with a mechanical high pressure fuel pump; a high pressure diesel pump rack is mechanically connected with a vehicle accelerator pedal; and according to the position of the high pressure oil pump rack of the diesel engine, the alternative fuel injection controller determines the injection quantity of alternative fuel in combination with estimation on the excess air coefficient of an engine and the operation intention of the driver and sends a control command to drive an alternative fuel injection valve to inject corresponding alternative fuel to an engine intake pipe. The method has the beneficial effects of lowering the cost and overcoming the adverse factors caused by the adoption of an electric oil pump rack actuator and can be widely applied to the diesel-alternative fuel hybrid combustion engines.

An engine (drive force) control apparatus for a motorcycle that prevents a change in vehicle behavior by noise or the like. A control CPU electronically controls injection and ignition of fuel and a throttle valve. An abnormality detecting portion detects an abnormality of the engine control apparatus by a predetermined abnormality detecting period. When the abnormality is detected, primary abnormality processing of the engine control apparatus is executed. When the abnormality is not detected, primary abnormality processing is released and an electronic control at normal time of the engine control apparatus is executed. When an abnormality detecting signal detected by the abnormality detecting portion continues even an elapse of a predetermined abnormality determining time period, primary abnormality processing is shifted to secondary abnormality processing.

An oxygen sensor control apparatus (10) obtains a correction coefficient for calibrating the relation between oxygen concentration and an output value of an oxygen sensor (20), when a fuel cut operation of an internal combustion engine (100) is performed. The apparatus includes average output value calculation means; inter-fuel-cut average output value calculation means; and correction coefficient calculation means.

There is provided an air-fuel ratio sensor with which an improvement in the accuracy in detecting the air-fuel ratio of detection target gas and an improvement in the response characteristics can both be achieved. The sensor includes a sensor element that outputs an output signal indicative of the air-fuel ratio of a detection target gas, a pair of electrodes including a detection target gas side electrode to which the detection target gas is introduced and an atmosphere side electrode exposed to the atmosphere, which are arranged in such a way as to sandwich the sensor element, a diffusion-controlling layer that is disposed on the sensor element in such a way as to cover the detection target gas side electrode and introduces the detection target gas from an entrance portion through which the detection target gas flows in to the detection target gas side electrode, and a catalyst layer provided on a part of the entrance portion.

A detecting device for a fuel injector includes a sensor unit and an ECU. The sensor unit is provided with a fuel pressure detection circuit which outputs a pressure detection signal in response to a fuel pressure. The ECU computes the fuel pressure based on a voltage value of the pressure detection signal relative to a reference voltage. The ECU obtains a comparative voltage according to an applied-voltage to the fuel pressure detection circuit and computes a deviation between the comparative voltage and the reference voltage. The sensor unit adjusts the applied-voltage in such a manner as to decrease the deviation. Thus, the computation accuracy of the fuel pressure is improved.

A hydrocarbon adsorbent state determining apparatus is provided for compensating the ability of a hydrocarbon adsorbent to adsorb moisture for fluctuations due to a change in the flow velocity of exhaust gases to accurately determine the state of the hydrocarbon adsorbent, including a deterioration thereof, irrespective of the change in the flow rate of exhaust gases. The hydrocarbon adsorbent state determining apparatus determines the state of a hydrocarbon adsorbent disposed in an exhaust system of an internal combustion engine for adsorbing hydrocarbons and moisture within exhaust gases. The hydrocarbon adsorbent state determining apparatus comprises a downstream humidity sensor for detecting the humidity of exhaust gases which have passed through the hydrocarbon adsorbent, a flow velocity parameter detector for detecting a flow velocity parameter indicative of a flow velocity of the exhaust gases, and an ECU for determining the state of the hydrocarbon adsorbent in accordance with the detected humidity of the exhaust gases and the flow velocity parameter.

An internal combustion engine (1) for operation in a switchable manner with liquid fuel or gaseous fuel operates with pilot injection in the gas mode, wherein in the event that the injectors (5, 8) provided for the pilot injection in the gas mode and for the injection in liquid fuel mode are connected to a common accumulator (6), the pressure level thereof is lower for the pilot injection in the gas mode than for the operation with liquid fuel.

Methods and systems are provided for estimating a fuel canister purge flow based on outputs of an intake manifold oxygen sensor. For example, during boosted engine operation when exhaust gas recirculation (EGR) is flowing below a threshold and purge is enabled, purge flow may be estimated based on changes in the sensor output while modulating a canister purge valve between an open and closed position. Then, during subsequent operation wherein EGR and purge flow are enabled, the output of the sensor may be adjusted based on the estimated purge flow.

An internal combustion engine has a plurality of cylinders having combustion chambers and each being associated with a spark plug designed for igniting a mixture of air and fuel in the combustion chamber, and at least two adjusting devices for adjusting the air supply to the combustion chambers of the different cylinders. To control the internal combustion engine, an individual ignition angle is detected for each group of cylinders to which the same air mass per working cycle is respectively supplied and during the respective working cycles of which the same loss torque is decisive. The decisive loss torque is the one associated with the cylinder that is in its intake cycle during the respective working cycle of the respective cylinder of the respective group. The individual ignition angle for each group is detected as a function of the decisive loss torque for the respective group.