Abstract:
A control device of a vehicle including an engine, an electric motor, and a clutch disposed on a power transmission path between the engine and the electric motor, the control device of a vehicle performing an ignition start causing combustion in a cylinder of the engine to rotate the engine at a start of the engine, the control device of a vehicle switching a cylinder in which combustion is first caused in the engine based on an actuation during a rotation stop process of the engine of an exhaust valve in a cylinder stopped in an expansion stroke, when performing the ignition start at the start of the engine.
Abstract:
A starting control device for an internal combustion engine is provided with a hard cranking device and a soft cranking device that are respectively capable of and incapable of cranking the internal combustion engine to a target idle rotation speed. The starting control device includes: a starting mode determination unit determining whether to carry out starting in a non-combustion pressure mode whereby starting is carried out with the hard cranking device, or in a combustion pressure combination mode whereby starting is carried out through cranking with the soft cranking device while using a combustion pressure generated by supplying fuel to the internal combustion engine in combination; and an intake air amount control unit making an amount of intake air during cranking differ between a case where starting is carried out in the non-combustion pressure mode and a case where starting is carried out in the combustion pressure combination mode.
Abstract:
A control device according to the present invention performs an automatic stop control in which an injection of fuel from a fuel injection valve is stopped and a rotation of an engine is stopped when an automatic stop condition is satisfied. Furthermore, the control device controls an injection operation of fuel and an ignition operation to the fuel in consideration of compression when the fuel is actually ignited in an expansion stroke cylinder, when a re-start demand occurs after an initiation of the automatic stop control and the engine is to be re-started by an ignition start-up. Specifically, the control device predicts a crank angle at an actual ignition time point in a case where processing for performing the ignition start-up at the present time whenever a predetermined time period has passed. Then, the control device initiates the ignition start-up when the crank angle falls within a predetermined range in which a sufficient compression can be attained. Thereby, the engine is more certainly re-started by the ignition start-up.
Abstract:
A control device of a cylinder direct injection type internal combustion engine controls a fuel injection device and an ignition device, executes injection of the fuel and ignition over multiple times, and executes a control of varying an interval between a timing of the injection of the fuel and a timing of the ignition, at the time of an ignition start in which the fuel is injected into a combustion chamber in an expansion stroke with rotation of an output shaft is stopped state and the fuel is ignited to start the rotation of the output shaft. The control device varies the interval between the timing of the injection of the fuel and the timing of the ignition by adjusting a correlation of a pitch of the injection of the fuel over multiple times and a pitch of the ignition over multiple times.
Abstract:
A method is provided for controlling an engine having two cylinders, one of which having an adjustable valve. The method comprising performing a combustion in two cylinders having pistons, the combustions for said cylinders occurring during a common stroke of the pistons; increasing a number of strokes in a cycle of one of the two cylinders; and returning operation of the one of the two cylinders to four strokes, so that combustion of the one of the two cylinders occurs sequentially from the other of the two cylinders.
Abstract:
A stop-start control apparatus for a port injection engine (1) including cylinders (2) stops the engine (1) by stopping fuel injection from each injector (13), when a predetermined stop condition is fulfilled. An estimated position of a piston (5) in each cylinder (2) after the engine (1) is stopped is determined during a stop process period from when the predetermined stop condition is fulfilled until when the engine (1) is stopped, and a compression stroke cylinder in which the piston (5) is to be stopped in a compression stroke is identified. An amount of fuel to be injected from the injector (13) for the compression stroke cylinder during the stop process period is set based on the estimated position of the piston (5) in the compression stroke cylinder. The injector (13) injects the fuel in the set fuel amount so that the fuel is contained in the compression stroke cylinder when the engine is stopped.
Abstract:
A method for engine starting is provided. The method may include performing idle-stop operation, and during a subsequent re-start, applying multi-strike ignition operation for a first combustion cycle. In this way, improved engine starting may be achieved with reduced emissions.
Abstract:
A method for operation of a vehicle having an internal combustion engine is provided. The internal combustion engine may include one or more combustion chambers, a fuel delivery system including a direct fuel injector coupled to each combustion chamber, an ignition system including one or more spark plugs coupled to each combustion chamber, a piston disposed within each combustion chamber, and an intake and an exhaust valve coupled to each combustion chamber, the internal combustion engine providing motive power to the vehicle. The method may include discontinuing combustion operation within the internal combustion engine responsive to idle-stop operation. The method may further include, during a direct-start, performing multi-strike ignition operation per combustion cycle via one or more selected spark plug(s) for at least a first combustion cycle in a combustion chamber following the discontinuation of combustion operation, the one or more selected spark plug(s) coupled to the combustion chamber.
Abstract:
A method for discontinuing combustion in a cylinder of an internal combustion engine having an intake manifold and an emission control device coupled downstream of thereof, where the cylinder has at least one valve, the method comprising during a shut-down and after a final combustion event in the cylinder, adjusting valve timing of the valve to reduce a flow of gasses from the engine to the emission control device.
Abstract:
A method for operating an engine in a vehicle, the engine having at least a cylinder, is described. The method comprises decreasing rotational speed of the engine; and when said engine speed falls in a specified region, adjusting a valve timing of the cylinder to generate one of expansion or compression braking torque to stop rotation of said engine in a desired range.