A system for starting an engine of a vehicle has a fuel injector injecting fuel into a closed intake port to form an air fuel mixture. The system also includes an actuator rotating a crankshaft in a first direction to open the intake port by moving a piston within a cylinder coupled to the crankshaft. A combustion chamber defines between the cylinder and the port receiving the air fuel mixture through the intake port. The actuator rotates the crankshaft in a second direction to close the intake port. A spark plug ignites the air fuel mixture to start the engine. The engine also includes many other disclosed features.

A battery-less fuel injection system, provided with an injector for injecting fuel supplied to an engine, a fuel pump for supplying fuel to the injector, and an ECU for controlling the injector, wherein a fuel pressure sensor for detecting the fuel pressure given to the injector is provided, and the ECU controls the fuel injection in the process of starting the engine, so that execution of fuel injection is suspended when the fuel pressure detected by the fuel pressure sensor is a set pressure or less, until it is confirmed that the detected fuel pressure has exceeded the set pressure.

A method for controlling starting of a vehicle upon a failure of a camshaft position sensor includes performing a fuel injection and ignition at a particular timing for starting an engine of the vehicle; measuring a battery voltage of the vehicle after the performing of the fuel injection and ignition for starting the engine; and when the battery voltage rises over a predetermined value, determining that the fuel injection and the ignition are performed at a normal timing.

A starting control method for a vehicle having an engine may include determining, by an ECU, whether engine RPM rises when the engine is started, determining whether combustion-related parts are normal, when the engine RPM does not rise over a starter RPM, determining whether a cam position sensor and a crank position sensor are normal, when it is determined that the combustion-related parts are normal, performing control to offset a recognized crank angle by 360 degrees, when it is determined that the cam position sensor and the crank position sensor are normal, and restarting the engine based on the offset crank angle.

An exact synchronization method for determining an angular position of an engine, modulo one engine cycle, by a crankshaft sensor and of at least one camshaft sensor. The method includes: estimating a continuous estimated interval assumed to contain the angular position, on receipt of a marker event, determining an angular position corresponding to each one of the possible occurrences of this marker, comparing the determined angular position with the estimated interval. If exactly one of the determined angular positions belongs to the estimated interval, then this angular position is the angular position of the engine. And an engine control method using such a method.

Provided is a device for performing an automatic stop operation for an internal combustion engine when a predetermined automatic stop requirement is satisfied during an operation of the internal combustion engine and performing a restart operation for the internal combustion engine when a predetermined restart requirement is satisfied during an automatic stop time period of the internal combustion engine. In the device, restart control means (22) executes fuel injection control at the time of start of the restart operation by determining whether or not initial asynchronous injection of a fuel into a cylinder that is in an intake stroke is executable in accordance with an initially detected crank angle after the start of the restart operation and determining a next fuel injection cylinder and a fuel injection timing for the next fuel injection cylinder.

The application discloses a control device and a control method for an engine. The control device includes an electronic control unit configured to execute a stop-and-start control of automatically stopping the engine when a predetermined automatic stop condition is established and automatically restarting the engine when a predetermined automatic-restart condition is established during the automatic stop of the engine, and in a case where the automatic-restart condition is established during fuel cut-off according to the automatic stop of the engine, prohibit detection of the toothless part based on the pulse signal output from the crank angle sensor, for a period until the crankshaft is rotated by a predetermined crank angle or more after the automatic-restart condition is established.

The present invention has: a crank angle sensor 4 that outputs a crank angle signal in response to rotation of a crankshaft 2, the crank angle signal being preset to indicate reference positions; a cam sensor 5 that outputs cam signal pulses in response to rotation of an intake camshaft 3 for opening and closing an engine valve; an electric motor 6 that relatively rotates intake camshaft 3 with respect to crankshaft 2, so that electric motor 6 can change a rotational phase angle of intake camshaft 3 with respect to crankshaft 2; and an electronic control unit 7 that computes an actual rotational phase angle of intake camshaft 3 based on a first cam signal pulse detected after start of cranking and a first reference position of the crank signal detected thereafter, to calculate an absolute position of a variable valve timing mechanism 14.

An estimation apparatus, includes: a sensor, disposed in the proximity of a crank rotor, configured to output a signal in response to a positional variation of an outer periphery of the crank rotor, the crank rotor including a plurality of protruding teeth formed at given distances and a tooth-missing region on an outer periphery of the crank rotor and configured to rotate in an interlocking relationship with a crankshaft of an internal combustion engine; and a processor configured to calculate a crank angular velocity of the internal combustion engine at given time intervals from the signal output from the sensor and estimate a first crank angular velocity corresponding to the tooth-missing region from second crank angular velocities at two or more points corresponding to at least one of portions before and after the tooth-missing region.

A control device for an electric variable valve timing mechanism is provided that can reduce the influence of rotation variations of an engine on a VTC detection angle computation. The control device for a variable valve timing mechanism uses a crank sensor signal and a cam sensor signal of the engine to calculate a rotation phase of the VTC mechanism. A pulse interval of the crank sensor signal is used for a calculation of the rotation phase of the VTC mechanism, and a calculation method of the rotation phase of VTC mechanism is changed depending on the pulse interval of the crank sensor signal determined before the cam sensor signal is input.