An engine control system is provided with a dual continuously variable valve duration (CVVD) device to optimize engine performance. The system includes an engine with a combustion chamber, an intake valve for selectively supplying an air-fuel mixture, an ignition plug for combustion, and an exhaust…
The disclosure relates to a method for operating an internal combustion engine. The internal combustion includes an intake manifold via which a cylinder can be supplied with fresh air, an inlet valve via which, when it is open, the fresh air can flow from the intake pipe into the cylinder, and a…
A continuous variable valve duration apparatus includes a camshaft, a cam unit on which a cam is formed and the camshaft is inserted, a guide bracket of which an upper guide boss is formed, an inner wheel transmitting the rotation of the camshaft to the cam unit, a wheel housing of which a guide…
A system according to the present disclosure includes a cylinder deactivation module and a valve lift control module. The cylinder deactivation module selectively deactivates a first cylinder of an engine while a second cylinder of the engine is active. When the first cylinder is deactivated, the…
The invention relates to an internal combustion engine of a motor vehicle in which a device for modifying valve behavior is configured so that at least one exhaust valve of at least one cylinder exhibits different kinetics during an initial volume reduction phase depending on whether the cylinder…
An internal combustion engine (1) includes an intake variable lift amount mechanism (14i) that changes a maximum lift amount and valve-open period of an intake valve (9), and an exhaust variable lift amount mechanism (14e) that changes a maximum lift amount and valve-open period of an exhaust valve…
A method for operating an internal combustion engine with a combustion engine, a fresh gas line, an exhaust line comprising an actively regenerable exhaust aftertreatment device, wherein for a cylinder of the combustion engine the supply of fresh gas is controlled by means of an intake valve and…
A control device of a multi-cylinder engine is provided. The control device includes an auxiliary component and a valve stopping device having a locking mechanism for stopping an operation of at least one of intake and exhaust valves of a specific cylinder of the multi-cylinder engine according to…
Valve stopping control is performed that changes an operating state of an intake valve (28) and an exhaust valve (30) to a closed-valve stopped state when executing a fuel-cut operation. A device is provided that sets an in-cylinder return-time target air-fuel ratio for an initial two return cycles…
An engine control apparatus includes a target air volume calculator (2b) which calculates a target air volume required by an engine (10), and an actual air volume calculator (2a) which calculates an actual air volume inhaled into a cylinder (19) of the engine (10) . The apparatus further includes…
A combustion timing prediction method for a compression self-ignition internal combustion engine includes the steps of: specifying types of a plurality of hydrocarbon components contained in a hydrocarbon fuel and proportions of the respective types in the hydrocarbon fuel; calculating, on the…
An intake control apparatus for an internal combustion engine (51) includes a variable valve operating mechanism (11) capable of varying a lift and operation angle of an intake valve (53) continuously and a control unit (69) that controls an intake air amount by varying the lift and operation angle…
Method for checking the functionality of a device for adjusting the stroke of a combustion engine gas exchange valve involves measurement of the exhaust gas composition using a sensor, e.g. a lambda sensor, and then evaluation of the composition.
A control system for an internal combustion engine in which a valve timing is switched between a low-speed (LO-V/T) or high-speed (HI-V/T) valve timing within a lean-burn control range established in accordance with the operational state (an intake pipe internal absolute pressure (PBA) and an…
The method calculates the mass flow of air supplied to the engine cylinders from the air intake by measuring the mass flow rate (rlroh) in the air intake and subtracting the variation in the measured air intake pressure (ps) multiplied by a volume and temperature dependent factor (KLFAKSRM). An…