摘要:
A method of operating a two-stroke cycle, opposed-piston engine comprising a pumping device coupled to pump air to cylinders of the engine through a charge air cooler and an aftertreatment system of thermally-activated devices coupled to receive exhaust from the cylinders by which a thermal state of the exhaust sufficient to sustain thermal activation of one or more of the aftertreatment system devices may be maintained during a deceleration or motoring condition of operation by reducing the mass airflow to the engine.
摘要:
A control method for internal combustion engine includes forming an air-fuel mixture leaner than that at a stoichiometric air-fuel ratio in a cylinder by first fuel injection, performing second fuel injection to inject fuel toward the vicinity of a discharge channel of an ignition plug during a period in which the air-fuel mixture is undergoing a low temperature oxidation reaction in a compression stroke, and after the second fuel injection, performing spark ignition by the ignition plug at a timing at which a spark of the ignition plug reaches the fuel injected by the second fuel injection.
摘要:
In a control apparatus of an engine having a first fuel injection valve for injecting fuel into an intake path of the engine, a second fuel injection valve for injecting fuel into a combustion chamber of the engine, a supercharger for supercharging intake air for the engine, and a waste gate valve for opening and closing an exhaust bypass passage for bypassing a turbine of the supercharger, the waste gate valve is controlled to act in an opening direction in accordance with an increase in the injection amount of fuel injected from the second fuel injection valve, in a region where the injection amount of fuel from the second fuel injection valve is larger than the injection amount of fuel from the first fuel injection valve.
摘要:
A system for monitoring and controlling operating parameters of a moving vehicle comprises a device adapted to be removably attached to a vehicle diagnostic data port. The device communicates through the vehicle diagnostic data port with various vehicle electronic control modules (such as an engine, transmission, exhaust, or other control modules). The device monitors vehicle operating parameters or conditions to detect when vehicle performance or efficiency or operation may be altered in a useful way. If so, the device commands the vehicle electronic control modules to alter the normal vehicle behavior to perform a different behavior. The device may be removable, and may command a moving or stationary vehicle. The device may also monitor and control an aftermarket exhaust valve attached to a vehicle, based on monitored vehicle operating parameters and conditions.
摘要:
A controller of a laser ignition engine configured to perform ignition by using a laser ignition device configured to emit a laser beam condensed by a lens includes: a combustion state related value acquiring portion configured to acquire a combustion state related value related to a combustion state of the engine; and a contamination determining portion configured to compare the combustion state related value acquired by the combustion state related value acquiring portion with a combustion state determining value to determine whether or not the laser ignition device is contaminated, the combustion state determining value being defined based on the combustion state of the engine when the laser ignition device is not contaminated.
摘要:
A control device for an internal combustion engine is provided. The device has a catalyst unit and a controller that has been programmed so as to control the internal combustion engine. The controller is programmed so as to execute an A/F vibration operation that performs lean combustion in at least one cylinder and performs rich combustion in at least one another cylinder, an early closing operation that advances a valve closing timing of an exhaust valve to an earlier timing than an intake top dead center, and an ignition retard angle operation that retards an ignition timing. In a case where combustion is unstable, the controller advances the ignition timing and to enlarge an amplitude of an air-fuel ratio in the A/F vibration operation, in comparison with a case where the combustion is stable.
摘要:
Methods and systems are provided for reducing late burn induced cylinder pre-ignition events. Forced entry of residuals from a late burning cylinder into a neighboring cylinder may be detected based on engine block vibrations sensed in a window during an open exhaust valve of the late burning cylinder. In response to the entry of residuals, a pre-ignition mitigating action, such as fuel enrichment or deactivation, is performed in the neighboring cylinder.
摘要:
Methods and systems are provided for improving engine knock tolerance, in particular when rapidly ramping in LP-EGR from low levels of EGR. Until a desired LP-EGR rate is achieved, fuel may be delivered as a split injection with at least an intake stroke injection and a compression stroke injection to compensate for the transport delay in EGR filling the intake system. Subsequently, single fuel injection may be resumed.
摘要:
Methods and systems are provided for reducing late burn induced cylinder pre-ignition events. Forced entry of residuals from a late burning cylinder into a neighboring cylinder may be detected based on engine block vibrations sensed in a window during an open exhaust valve of the late burning cylinder. In response to the entry of residuals, a pre-ignition mitigating action, such as fuel enrichment or deactivation, is performed in the neighboring cylinder.
摘要:
An internal combustion engine includes a variable valve mechanism that takes a valve characteristic of an intake valve, and changes the valve characteristic according to an engine operating state; a turbocharger that includes a bypass passage that bypasses a turbine wheel arranged in an exhaust passage by connecting a portion of the exhaust passage that is upstream of the turbine wheel to a portion of the exhaust passage that is downstream of the turbine wheel, and a waste gate valve that adjusts a flow path area of the bypass passage; and a control apparatus configured to, when there is a request to increase the valve characteristic according to a change in the engine operating state, change the valve characteristic to an increase side with the variable valve mechanism after opening the waste gate valve to an opening amount that is larger than before the request.