摘要:
A method of operating a multiple cylinder internal combustion engine in a four-stroke cycle. A first amount of fuel is introduced into each of the cylinders (10) earlier than 45 degrees before top dead center of a combustion stroke. Air significantly in excess of that providing a stoichiometric amount of oxygen is also introduced into each cylinder to produce a first mixture upon introduction of the fuel, which mixture is ignited to produce a first combustion event. Subsequent to substantial completion of the first combustion event, but prior to top dead center in the same combustion stroke or shortly after top dead center in the expansion stroke, a second amount of fuel is introduced into each cylinder without additional air to form a second mixture which is ignited to produce a second distinct combustion event.
摘要:
A GDCI engine (12) has a piston (16) arranged within a cylinder (14) to provide a combustion chamber (18). According to one embodiment, the GDCI engine (12) operates using a method that includes the steps of supplying a hydrocarbon fuel to the combustion chamber (18) with a research octane number in the range of about 30-65. The hydrocarbon fuel is injected in completely stratified, multiple fuel injections before a start of combustion and supplying a naturally aspirated air charge to the combustion chamber (18).
摘要:
A GDCI engine (12) has a piston (16) arranged within a cylinder (14) to provide a combustion chamber (18). According to one embodiment, the GDCI engine (12) operates using a method that includes the steps of supplying a hydrocarbon fuel to the combustion chamber (18) with a research octane number in the range of about 30-65. The hydrocarbon fuel is injected in completely stratified, multiple fuel injections before a start of combustion and supplying a naturally aspirated air charge to the combustion chamber (18).
摘要:
When fuel is injected into a combustion chamber (2) of a cylinder (13) of an engine (30) of a vehicle (10), fuel is injected in the form of multiple jets (3) by means of an injector (1). In this context, a first plane is defined in which both the central axis (11) of the injector (1) and the central axis (12) of the cylinder (13) are located. Furthermore, a second plane is defined in which both the central axis (11) of the injector (1) and the surface normal of the first plane lie. The jets (3) are generated in such a way that, for each jet pair which is formed from two of the jets (3), an angle between the projections of the two central axes of the two jets of the jet pair into the second plane is less than 50°.
摘要:
A method of controlling fuel delivery in a fuel injection system capable of performing a split injection includes comparing at least one engine operating temperature to a temperature threshold, and disabling split injection when at least one engine operating temperature exceeds the temperature threshold. Disabling split injection in this manner enhances cold temperature engine operation while providing a single injection at higher operating temperatures, as desired. Further, an engine (12) and a computer readable storage medium (28) having information stored thereon representing instructions executable by an engine controller (22) for comparing at least one engine operating temperature to a temperature threshold are also provided. The computer readable storage medium instructions disable split injection when at least one engine operating temperature exceeds the temperature threshold.
摘要:
A method of controlling fuel delivery in a fuel injection system capable of performing a split injection includes comparing at least one engine operating temperature to a temperature threshold, and disabling split injection when at least one engine operating temperature exceeds the temperature threshold. Disabling split injection in this manner enhances cold temperature engine operation while providing a single injection at higher operating temperatures, as desired. Further, an engine (12) and a computer readable storage medium (28) having information stored thereon representing instructions executable by an engine controller (22) for comparing at least one engine operating temperature to a temperature threshold are also provided. The computer readable storage medium instructions disable split injection when at least one engine operating temperature exceeds the temperature threshold.