Fuel injection control of an engine is executed by setting a required injection amount and an air-fuel ratio correction amount. When setting conditions are met, the air-fuel ratio correction amount is set for a corresponding region to which a current intake air amount or load ratio belongs among a plurality of regions into which the range of the intake air amount or the load ratio is divided such that a region of a larger intake air amount or a higher load ratio becomes wider than a region of a smaller intake air amount or a lower load ratio. When purge conditions are met, a purge control valve is controlled such that purge of supplying an evaporated fuel gas to an intake pipe is executed based on a required purge ratio.

An engine controller calculates a pulsation correction value based on actuation states of an air bypass valve (ABV) and a wastegate valve (WGV) that change the shape of intake and exhaust flow passages of an exhaust turbocharger. The pulsation correction value is used to compensate for an output error of an airflow meter caused by intake pulsation. The engine controller also calculates a fuel injection amount of an injector, based on an output of the airflow meter that has been corrected based on the pulsation correction value.

A system and method of managing an on-demand electrolytic reactor for supplying hydrogen and oxygen gas to an internal combustion engine. The system minimizes reactor's power consumption and parasitic energy loss generally associated with perpetual reactors. The system comprises a plurality of sensors coupled to the reactor measuring a plurality of reactor parameters, an electronic control unit coupled to the plurality of sensors and the engine, and a reactor control board coupled to the reactor and the electronic control unit. The electronic control unit: monitors the plurality of reactor parameters and the plurality of engine parameters; determines a reactor performance level; determines an engine performance level; determines a change in the engine performance level to forecast a future engine demand level; and determines an ideal reactor performance level corresponding to the engine performance level or the future engine demand level. The reactor control board regulates the reactor by modifying at least one of electrical current supplied to the reactor, electrical voltage supplied to the reactor, and temperature of the reactor.

An abnormality determination device of an internal combustion engine in which a breather line connects an intake-air path positioned upstream from a forced-induction system and a crankcase includes an intake-air flow rate sensor that detects an intake air flow rate in the intake-air path, a pressure sensor that detects a pressure of the breather line, and an abnormality determination unit that determines abnormality of the breather line. The abnormality determination unit estimates an intake air resistance of the intake-air path from the pressure when the engine is under low load conditions under which the intake air flow rate is less than a predetermined value and the pressure when the engine is under high load conditions under which the intake air flow rate is the predetermined value or greater and determines abnormality of the breather line when the intake air resistance is less than a threshold.

A temperature acquisition apparatus for an internal combustion engine is configured to acquire a temperature of a combustion chamber of the internal combustion engine. The apparatus includes: an electronic control unit having a processor and a memory coupled to the processor. The processor is configured to perform: acquiring an intake air amount of the internal combustion engine; calculating a cumulative intake air amount based on the intake air amount; and acquiring a temperature of the internal combustion engine based on the cumulative intake air amount.

A mass-flow throttle for highly accurate control of gaseous supplies of fuel and/or air to the combustion chambers for a large engine in response to instantaneous demand signals from the engine's engine control module (ECM), especially for large spark-ignited internal combustion engines. With a unitary block assembly and a throttle blade driven by a non-articulated rotary actuator shaft, in combination with control circuitry including multiple pressure sensors as well as sensors for temperature and throttle position, the same basic throttle concepts are suited to be used for both mass-flow gas (MFG) and mass-flow air (MFA) throttles in industrial applications, to achieve highly accurate mass-flow control despite pressure fluctuations while operating in non-choked flow. The throttle, in combination with the sensors and ECM, enable detection of backfire events, with the throttle system further being enabled to take operative measures to prevent damage to the throttle components resulting from a backfire event.

A method of two-step variable valve lift (VVL) malfunction avoidance learning control may include: in a two-step VVL system which is operated with a main lift and a secondary lift, verifying, by an electronic control unit (ECU), an operation avoidance area based on locking of a lock pin of a cam follower ; performing VVL operation learning, in which a failure of occurrence of the second lift is determined on the basis of a locking failure of the cam follower due to an initially set value of the operation avoidance area; and reflecting the operation avoidance area to the two-step VVL system with a corrected set value which is obtained through the VVL operation learning.

An internal combustion engine control apparatus including a microprocessor. The microprocessor is configured to perform controlling a fuel injector so as to inject a fuel of a target injection amount by dividing into a plurality of times at a predetermined time interval in an area from a first crank angle at which an intake stroke is started to a second crank angle at which a compression stroke is ended, and setting the predetermined time interval. The microprocessor is configured to perform the setting including setting the predetermined time interval so that a spray length from a tip of the fuel injector to a tip of a spray of the fuel injected from the fuel injector becomes shorter than the spray length when the fuel of the target injection amount is injected at once in the area by a predetermined rate.

Provided is a start controller for an engine capable of reducing torque of a starter consumed to start the engine. The start controller includes a stop position sensor that detects a position of a piston in each cylinder at an engine stop time, an intake pressure sensor that detects an intake pressure in an intake passage, and a processor that determines whether the position of the piston in each of the cylinders detected by the stop position sensor is within a specified target range after the engine is stopped. In the case where it is determined that the position of the piston in each of the cylinders after the engine stop is out of the target range and the intake pressure detected by the intake pressure sensor is lower than an atmospheric pressure, the engine is started by a motor even when an engine start condition is not satisfied.

An internal combustion engine is controlled in response to a location of the engine and an operational status of the engine to stop or reduce carbon monoxide emissions.