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    • 5. 发明申请
    • System and method for boosted direct injection engine
    • 升压直喷发动机的系统和方法
    • US20070256666A1
    • 2007-11-08
    • US11827157
    • 2007-07-10
    • Ralph CunninghamGraham HoareMichael ShelbyGopiohandra Surnilla
    • Ralph CunninghamGraham HoareMichael ShelbyGopiohandra Surnilla
    • F02B77/00
    • F02D13/0261F02B23/104F02B25/145F02B37/00F02B2075/125F02D13/0215F02D13/0249F02D41/0007F02D41/0032F02D41/405F02D2041/001F02D2041/389Y02T10/123Y02T10/144Y02T10/18Y02T10/44
    • An engine system, comprising of a combustion chamber selectively communicating with an intake manifold via at least an intake valve and an exhaust manifold via at least an exhaust valve, a turbocharger including a compressor operatively coupled to the intake manifold and a turbine operatively coupled to the exhaust manifold, wherein the turbocharger is configured to selectively boost intake manifold pressure greater than exhaust manifold pressure during at least one operating condition, a direct fuel injector configured to inject fuel directly into the combustion chamber, a spark plug configured to provide an ignition spark to the combustion chamber, a valve actuation system coupled to the intake valve and the exhaust valve configured to vary a relative timing of the intake valve and the exhaust valve and a control system communicatively coupled to the valve actuation system, the direct fuel injector, and the spark plug wherein during said at least one operating condition, the control system is configured to operate the valve actuation system to increase an overlap between exhaust valve opening and intake valve opening to increase an amount of air flowing through the combustion chamber from the intake manifold via the opened intake valve to the exhaust manifold via the opened exhaust valve, initiate an injection of fuel directly into the combustion chamber via the direct fuel injector after the exhaust valve has closed, and ignite said injected fuel by operating the spark plug to provide an ignition spark.
    • 一种发动机系统,包括经由至少一个进气门和至少一个排气阀与排气歧管选择性地与进气歧管连通的燃烧室,包括可操作地连接到进气歧管的压缩机的涡轮增压器和可操作地耦合到该进气歧管的涡轮机 排气歧管,其中所述涡轮增压器构造成在至少一个操作条件期间选择性地增加进气歧管压力大于排气歧管压力;配置成将燃料直接喷射到所述燃烧室中的直​​接燃料喷射器,被配置为将点火火花提供给 燃烧室,耦合到进气门的阀致动系统和被配置成改变进气门和排气门的相对定时的排气阀,以及可连通地联接到阀致动系统,直接燃料喷射器和 火花塞,其中在所述至少一个操作条件期间,所述控制 系统被配置为操作阀致动系统以增加排气门开口和进气门开度之间的重叠,以增加从进气歧管经过打开的进气门流经燃烧室的空气量经由打开的排气阀 在排气阀关闭之后通过直接燃料喷射器开始直接喷射到燃烧室中,并且通过操作火花塞来点燃所喷射的燃料以提供点火火花。