摘要:
Methods and systems are provided for determining a type of spark plug fouling. In one example, a method may include differentiating spark plug fouling due to soot accumulation from spark plug fouling due to fuel additive accumulation based on a current on a control wire of the spark plug following application of a dwell command. Further, exhaust oxygen sensor degradation and/or exhaust catalyst degradation may be determined based on switching frequencies of one or more exhaust oxygen sensors and the type of spark plug fouling.
摘要:
An ignition coil system is configured for use with a spark ignition internal combustion engine. The system includes a first switching circuit electrically connected to the primary coil that provides electrical power to the primary coil. The system includes a second switching circuit connected to the primary coil that is configured to short the terminals of the primary coil after the secondary current has been induced in the secondary coil, whereby the secondary coil induces a current in the primary coil, thereby reducing the secondary current in the secondary wire coil. A controller in communication with the first and second switching circuits is configured to receive a single electronic spark timing (EST) signal and to control the conductive states and the non-conductive states of the first and second switching circuits based on this single EST signal.
摘要:
An ignition system for a spark ignition internal combustion engine includes a transformer, a switching device, a spark-plug, and a controller. The switching-device is operable to an off-state, an on-state, and a linear-state to control a primary current through a primary coil and a secondary current through a secondary coil. The controller is configured to receive a single control-signal that includes a spark-control portion followed by a snubbing-control portion, and operate the switching-device based on the single control-signal. The controller operates the switching device from the off-state to the on-state and back to the off-state in response to the spark-control portion, whereby the secondary current is sufficient for the spark-plug to generate a spark, and operates the switching-device from the off-state to the on-state followed by the linear-state in response to the snubbing-control portion, whereby the secondary current is suppressed such that the spark-plug does not generate a spark.
摘要:
A method of controlling the ignition of a gasoline engine having an ignition coil which generates a spark on a spark plug, whereby the instant when coil charging starts is determined for each engine cycle as a function of the angular position of the crankshaft and the rotation speed of the engine, by calculating the ratio between the crankshaft angle of rotation still to pass through before the crankshaft reaches the angular position at which the ignition spark is to be produced, and the time required to charge the coil.
摘要:
An engine control system for a vehicle includes a variable displacement module that deactivates N of M cylinders of an engine during a fuel management mode. N is an integer and M is an integer greater than 1. A spark control module generates a spark timing signal for the N cylinders based on a pre-dwell time and a fuel management dwell modifier during the fuel management mode. The spark control module reduces dwell time of the N cylinders during the fuel management mode based on the fuel management dwell modifier.
摘要:
Methods for operating a management system that manages a large number of first function modules and second function modules. An inhibitor module I sets first control statuses to designating blocking when associated events are detected by an event detecting device, and then the management system no longer makes associated first function modules available for execution. The inhibitor module I sets second control statuses to designating executable when associated events are detected by an event detecting device, and then the management system makes associated second function modules available for execution.
摘要:
An internal combustion engine comprises a number of cylinders. The cylinders have electronically activated intake valves. Ignition coils for the cylinders are responsive to respective ignition signals such that charge accumulates in a coil for a cylinder when the ignition signal for the cylinder has a first state and then the charge causes ignition for the cylinder when the ignition signal for the cylinder changes to a second state. In response to detecting an intake valve fault in respect of a cylinder, the ignition signal for the cylinder is held in the first state for a number of cycles of the internal combustion engine, and is then switched to a second state to safely discharge the primary coil without combustion in the cylinder.
摘要:
A system and method of managing the energy stored in a single ignition coil of a distributor inductive ignition for an engine. The engine comprises a plurality of cylinders and the ignition coil has a primary coil current. The ignition coil has a stored energy and a released energy during an ignition period. A pre-dwell time period and a pre-dwell current level is determined. The stored energy of the ignition coil and the released energy of the ignition coil are balanced during the ignition period at least in part by dwelling the primary coil current in the ignition coil at substantially the pre-dwell current level.
摘要:
Method for controlling a primary current in an ignition coil of an internal combustion engine with controlled ignition, the current is established in an inductive primary circuit over a given conduction time. The conduction time is calculated by: predetermining the predetermined conduction time, carrying out at least one measurement of the current in the primary circuit at an instant lying in the last tenth of the predetermined conduction time; estimating the current at the end of the predetermined conduction time, as a function of the measurement(s) carried out; optionally correcting the conduction time for the ignition cycle during which the last current measurement was carried out, as a function of the previous estimate and the current desired at the end of the conduction time.
摘要:
In a method for controlling a primary current in an ignition coil of an internal combustion engine with controlled ignition, the current is established in an inductive primary circuit over a given duration, referred to as the conduction time and determined by calculation and/or as a function of measurements carried out in the primary circuit. The conduction time is calculated according to the following steps: predetermining the predetermined conduction time (td i), carrying out at least one measurement of the current (Ic i) in the primary circuit at an instant (t i) lying in the last tenth of the predetermined conduction time (td i), estimating the current (If i) at the end of the predetermined conduction time (td i), as a function of the measurement(s) carried out, optionally correcting the conduction time (td i) for the ignition cycle during which the last current measurement was carried out, as a function of the previous estimate and the current (Itarget i) desired at the end of the conduction time.