Systems and methods for activating and deactivating cylinders of an engine that may activate and deactivate one cylinder independent of other cylinders are presented. In one example, an engine cylinder firing fraction and a remainder value that is based on the engine cylinder firing fraction are a basis for activating and deactivating engine cylinders. The systems and methods also provide for transitioning between different cylinder firing fractions.

An abnormality diagnosis apparatus is an abnormality diagnosis apparatus for a pressure sensor provided in a purge passage that provides communication between an intake passage of an internal combustion engine and a canister, the pressure sensor being closer to the intake passage than a purge valve and a check valve are, the purge valve opening and closing the purge passage, the abnormality diagnosis apparatus for the pressure sensor including: a first determination unit that determines whether the purge valve is being kept in a closing state and a fuel cut in which fuel injection in the internal combustion engine is stopped is being executed; and a second determination unit that determines whether the pressure sensor is abnormal, based on a detection value of the pressure sensor, when the positive determination is made by the first determination unit.

An engine speed control device performing: a first PID gain calculation step of calculating a target engine speed to thereby calculate a first PID gain based on an engine speed deviation between the target engine speed and an engine speed; a target rack position calculation step of correcting the first PID gain based on a cooling water temperature to thereby calculate a target rack position of a fuel injection pump; a second PID gain calculation step of calculating a second PID gain based on a rack position deviation between the target rack position and a rack position; and a rack control signal producing step of correcting the second PID gain based on a lubricating oil temperature to thereby produce a rack control signal. The engine speed control device thus controls an engine speed by controlling the rack position based on the rack control signal.

Systems and methods for injecting fuel to an engine in response to a fuel injection delay are presented. The method includes determining fuel delay in a fuel injected engine with cylinders that may be deactivated. In one example, the fuel injection delay is determined via a cylinder firing schedule array when the cylinder firing schedule array is available. The fuel injection delay is determined via a weighted average of a fuel injection delay of a present engine cycle and a fuel injection delay of a past engine cycle when the cylinder firing schedule array is not available.

A control apparatus for an internal combustion engine includes circuitry configured to control a fuel injector of the internal combustion engine to stop injecting fuel to reduce torque generated by the internal combustion engine during upshift. The circuitry is to acquire a target injection amount parameter corresponding to a target injection amount of the fuel to be injected by the fuel injector to operate the internal combustion engine based on an operation state parameter corresponding to an operation state of the internal combustion engine. The circuitry is to acquire a minimum injectable amount parameter corresponding to a minimum injectable amount of the fuel injectable from the fuel injector. The circuitry is to control the fuel injector to start injecting the fuel when the minimum injectable amount parameter exceeds the target injection amount parameter while the fuel injector is controlled to stop injecting the fuel during the upshift.

Provided is a vehicle control system capable of controlling the behavior of a vehicle, in conformity to a tire longitudinal spring constant, to improve responsivity and linear feeling of the vehicle behavior with respect to a steering manipulation. The vehicle control system comprises a steering angle sensor (8) and a PCM (14). The PCM is configured to set, based on a detection value of the steering angle sensor, an additional deceleration to be added to a vehicle (1), and control the vehicle to generate the set additional deceleration in the vehicle, wherein the additional deceleration is set to be larger when a tire longitudinal spring constant (Kt) of each road wheel of the vehicle is relatively small than when it is not relatively small.

A device that is used for the electrical connection of a control cable to a plurality of injection valves includes a connecting plug to which the control cable can be plugged, and a plurality of contact points at each of which an electrical connection to one of the injection valves is enabled. Electrical lines are routed from the connecting plug to the contact points, and, at least in come segments the routing is through a housing. The connecting plug has a connecting plug receptacle and a plug element that, in the installed state, is plugged into the connecting plug receptacle and that receives ends of the electrical lines.

Method of controlling the temperature of fuel injected into a combustion engine to enable a reduction in the amount of fuel injected into engines which may be powered both by pure gasoline and by ethanol or by any biofuel mixture.

A control apparatus of a supercharging system for supplying an engine with compressed intake air, includes: a supercharger including a compressor configured to compress the intake air to be supplied to the engine; and a controller for controlling a control device affecting operation of the compressor. The controller includes: a compressor map storage part configured to store a compressor map which indicates a relationship of an intake volume flow rate, a pressure ratio, and a compressor rotation speed in the compressor; a current position calculation part configured to calculate a current position of an operational point of the compressor on the compressor map every predetermined period; a moving direction calculation part configured to calculate a moving direction of the operational point on the compressor map on the basis of the current position of the operational point calculated by the current position calculation part; and a control part configured to control the control device on the basis of the current position of the operational point calculated by the current position calculation part and the moving direction of the operational point calculated by the moving direction calculation part.

The present disclosure provides a method for learning emergency injection correction of an injector for preventing misfire. A misfire rate in a multi-stage injection mode is monitored, and it is controlled to be forcibly switched to a single injection mode when the misfire rate by the monitoring is equal to or greater than a specific value, such that injector injection correction learning is performed according to a learning entry condition. Accordingly, it is possible to reduce the deviation between cylinders by the sufficient injection amount deviation correction learning, thereby preventing misfire of the injector.