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1.发明授权Control of engine fuel injection during transitional periods associated with deceleration fuel cut-off 失效在与减速燃料切断相关的过渡期间控制发动机燃油喷射
公开(公告)号：US5119781A
公开(公告)日：1992-06-09
申请号：US661975
申请日：1991-02-28
申请人： Douglas E. Trombley , Kenneth J. Buslepp , Paul E. Reinke , Steven D. Stiles , Kenneth G. Macklem
发明人： Douglas E. Trombley , Kenneth J. Buslepp , Paul E. Reinke , Steven D. Stiles , Kenneth G. Macklem
CPC分类号： F02D41/126 , F02D41/0087 , F02D2041/389 , F02D2250/21
摘要： A method is described for controlling the injection of fuel in a direct injected, multi-cylinder internal combustion engine, to smooth transients in engine output torque associated with a deceleration fuel cut-off mode of engine operation. This is accomplished by detecting engine operating conditions that call for the initiation of a transition associated with the decelaration fuel cut-off engine operating mode. In response to the detected operating conditions, a transitional period is initiated, during which the injection of fuel into a varying portion of engine cylinders is then interrupted. When the transitional period is associated with entry into the deceleration fuel cut-off mode, the injection of fuel to a progressively increasing number of cylinders is interrupted. When the transitional period is associated with recovery from the deceleration fuel cut-off mode, the injection of fuel to a progressively decreasing number of engine cylinders is interrupted. The rate of entry into the fuel cut-off mode is preferably fixed, while the rate of receovery is determined in accordance with the position of an engine control element for adjusting the amount of torque developed at the engine output. Alternatively, the rate of recovery may be determined by the maximum rate of positional change of the engine control element.
摘要翻译： 描述了一种用于控制直接喷射的多气缸内燃机中的燃料喷射的方法，以平滑与发动机运转的减速燃料切断模式相关的发动机输出转矩的瞬变。 这是通过检测要求启动与减速燃料切断发动机运行模式相关联的过渡的发动机操作条件来实现的。 响应于检测到的操作条件，开始过渡时段，在此过程中燃料喷射到发动机气缸的变化部分中然后被中断。 当过渡时段与进入减速燃料切断模式相关联时，燃料逐渐增加的气缸喷射被中断。 当过渡期与减速燃料切断模式的恢复相关联时，燃料喷射到逐渐减少的发动机气缸的数量被中断。 优选地，进入燃料切断模式的速度是固定的，而根据用于调节在发动机输出时产生的转矩的量的发动机控制元件的位置来确定再生速率。 或者，恢复速率可以通过发动机控制元件的最大位置变化率来确定。
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2.发明授权Method for controlling a crankcase scavenged two-stroke engine during deceleration fuel cut-off 失效用于在减速燃料切断期间控制曲轴箱清扫的二冲程发动机的方法
公开(公告)号：US5094206A
公开(公告)日：1992-03-10
申请号：US659777
申请日：1991-02-25
CPC分类号： F02D41/123 , F02D41/0005 , F02D9/02 , F02B2075/025 , F02D2009/0237 , F02D2009/0242 , F02D2400/04 , Y02T10/42
摘要： A method is described for increasing engine braking, when a crankcase scavenged two-stroke engine is operated in a deceleration fuel cut-off mode. In response to the detection of operating conditions indicating engine operation in the deceleration fuel cut-off mode, the quantity of air inducted into the engine is decreased, for a predetermined period of time. After this period of time elapses, the quantity of air inducted into the engine is then increased. This is preferably accomplished by regulating the degree of opening of a throttle valve disposed within the engine air intake system. The initial closing of the throttle valve restricts air flow through the engine for a predetermined time, to maintain efficient catalyst operating temperatures in the engine exhaust system. During extended operation in the deceleration fuel cut-off mode, the throttle valve is opened, after the lapse of the predetermined time, to increase the quantity of air inducted by the engine. This results in increased engine braking, due to the additional work that must be performed in compressing the larger quantity of inducted air.
摘要翻译： 描述了一种用于增加发动机制动的方法，当曲轴箱清扫的二冲程发动机以减速燃料切断模式操作时。 响应于在减速燃料切断模式中检测到指示发动机运转的运行条件，导入发动机的空气量减少预定时间段。 经过这段时间后，引入发动机的空气量就会增加。 这优选通过调节设置在发动机进气系统内的节流阀的开度来实现。 节气门的初始关闭限制了通过发动机的空气流动预定时间，以保持发动机排气系统中有效的催化剂操作温度。 在减速燃料切断模式的延长运转中，节气门在经过规定时间之后打开，以增加发动机所引入的空气量。 这导致增加发动机制动，这是由于在压缩较大量的引入空气时必须执行的额外工作。
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3.发明授权
公开(公告)号：US5150692A
公开(公告)日：1992-09-29
申请号：US807315
申请日：1991-12-16
CPC分类号： F02M67/02 , F02D33/00 , F02D41/32 , F02D7/02 , F02D2041/3088 , F02D2041/389 , F02D41/3023
摘要： A system is disclosed for controlling the pressure in a pressurized air supply for an internal combustion engine having pneumatic direct fuel injection, wherein pressurized air from the supply is utilized to inject fuel held within a fuel injector directly into an engine cylinder, against opposing cylinder compression pressure, while the injector is opened during a cylinder injection period in the engine cycle. The system adjusts the duration of the cylinder fuel injection period in accordance with the sensed pressure in the air supply to maintain the air supply pressure above cylinder compression pressure during the injection period, thereby preventing the backflow of fuel through the cylinder fuel injector into the air supply.
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公开(公告)号：US5163398A
公开(公告)日：1992-11-17
申请号：US807352
申请日：1991-12-16
摘要： An idle speed regulating system is described for an internal combustion engine operating according to a fuel based control strategy, wherein the amount of fuel delivered the engine is determined directly as a function of the demand for engine output power and the amount of air supplied to the engine is controlled as a function of the quantity of delivered fuel. The system senses the actual idling rotational speed of the engine, derives a desired idling speed for the engine, and reduces the difference between the desired and actual idling speeds by adjusting the flow rate of the quantity of fuel delivered to the engine as a function of the difference between the desired and actual idling speeds. More specifically, the rate of fuel flow is adjusted in accordance with the sum of an open-loop feedforward value, a closed-loop feedback value, and preferably an adaptive learning correction value.
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5.发明授权Method and means for determining air mass in a crankcase scavenged two-stroke engine 失效用于确定曲轴箱清扫二冲程发动机中的空气质量的方法和装置
公开(公告)号：US4920789A
公开(公告)日：1990-05-01
申请号：US409377
申请日：1989-09-19
CPC分类号： G01F1/86 , F02D41/18 , F02B2075/025 , F02D2400/04
摘要： A method and means are described for determining the mass of air available for combustion within a cylinder of a crankcase scavenged two-cycle engine, without the use of a mass-air flow sensor. This is achieved by estimating the mass of air under compression within a crankcase chamber, prior to its transfer to a cylinder combustion chamber during the engine operating cycle. The estimate for air mass is based upon the polytropic behavior of a portion of the crankcase compression process, and the pressure, volume and temperature of the air at two predetermined engine rotational positions during the polytropic phase of compression. The volume of the air within the crankcase chamber is determined as a function of engine rotational angle, with crankcase air temperature being derived as a function of intake air temperature. Air pressure during the polytropic phase of compression is sensed with a pressure sensor disposed within the crankcase chamber. The estimate for air mass is corrected to account for air leakage and imperfect transference of the air between the crankcase and combustion chambers.
摘要翻译： 描述了一种用于确定可用于在曲轴箱清扫的两冲程发动机的气缸内燃烧的空气的质量的方法和装置，而不使用质量 - 空气流量传感器。 这是通过在发动机运转循环期间将其转移到气缸燃烧室之前估计在曲轴箱室内的压缩空气质量来实现的。 空气质量的估计基于曲轴箱压缩过程的一部分的多变性行为，以及在压缩多相期间的两个预定的发动机转动位置处的空气的压力，体积和温度。 曲轴箱室内空气的体积被确定为发动机旋转角度的函数，曲轴箱空气温度作为进气温度的函数导出。 用设置在曲轴箱内的压力传感器检测压缩多相期间的空气压力。 对空气质量的估计被校正以考虑空气泄漏和曲轴箱和燃烧室之间的空气的不完全转移。
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公开(公告)号：US5331939A
公开(公告)日：1994-07-26
申请号：US69334
申请日：1993-06-01
CPC分类号： F02D41/045 , F02D33/00 , F02D41/047 , F02D7/02
摘要： Air/fuel ratio control compensation is applied to an internal combustion engine having pneumatic fuel injection, wherein an engine operating condition is determined and appropriate compensation provided to the fuel command when an operating condition is sensed in which a significant fuel residue remains in the pneumatic injector after the end of an injection period.
摘要翻译： 空气/燃料比控制补偿被应用于具有气动燃料喷射的内燃机，其中确定发动机运行状态，并且当感测到在燃料残留物中存在大量燃料残留物的气动喷射器时，向燃料命令提供适当的补偿 注射期结束后。
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公开(公告)号：US5289812A
公开(公告)日：1994-03-01
申请号：US69464
申请日：1993-06-01
摘要： Engine inlet air/fuel ratio compensation is applied to an internal combustion engine having pneumatic fuel injection, wherein the difference between a value proportional to inlet air pressure and a value proportional to inlet fuel pressure is monitored and a commanded fuel or air quantity adjusted as a predetermined function of the difference.
摘要翻译： 发动机进气空燃比补偿被应用于具有气动燃料喷射的内燃机，其中监测与入口空气压力成比例的值与与入口燃料压力成比例的值之间的差异，并且将指令的燃料或空气量调节为 预定功能的差异。
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8.发明授权
公开(公告)号：US4958609A
公开(公告)日：1990-09-25
申请号：US451834
申请日：1989-12-18
CPC分类号： F02D41/045 , F02D41/345 , F02B2075/025 , F02B2075/125 , F02D2400/04 , Y02T10/123 , Y02T10/44
摘要： A method and apparatus for improving the output torque response of a crankase scavenged, two-stroke engine to a change in throttle position by adjusting the conventional timing of cylinder fuel injection as a function of the position of the throttle and the time rate of change in the throttle position. Preferably, throttle position is measured with a potentiometer connected to the engine air intake throttle, and then filtered with a filter having a first order lag characteristic. Injection timing is advanced based upon a first predetermined schedule as a function of the measured throttle position. The difference between the measured and filtered throttle positions represents an indication of the time rate of change of throttle position and is employed to advance or retard timing in accordance with the second predetermined schedule, depending upon whether the difference is positive or negative, respectively. As a result, a substantially linear relationship is established between the output torque of the engine and the position of the throttle over its entire range of movement, and the amount of time required for the engine to respond to abrupt changes in throttle is reduced.
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公开(公告)号：US4955341A
公开(公告)日：1990-09-11
申请号：US408868
申请日：1989-09-18
CPC分类号： F02D41/345 , F02B2075/025 , F02B2075/125 , F02D2400/04 , Y02T10/123 , Y02T10/44
摘要： A method and apparatus for controlling the idling rotational speed of a direct fuel injected, crankcase scavenged, two-stroke engine are disclosed. This is accomplished by regulating the timing of engine fuel injection within the rotational cycle of the engine. If the engine idling speed is outside a predetermined range of speeds, containing a target idling speed, the timing of fuel injection is advanced within the rotational cycle of the engine to increse idling speed, or retarded to decrease idling speed. The value by which fuel injection timing is advanced or retarded is determined by the difference between the actual idling speed and the target idling speed. The target idling speed is made a function of engine operation temperature to assure that a cold engine will idle properly when first started. After fuel injection timing is changed, a predetermined period of time is waited before repeating the idle control steps, to allow engine speed to stabilize. The method also provides for advancing fuel injection timing by a relatively large amount in the event that the idling speed falls below a predetermined stalling speed. The stalling speed is made to depend upon engine operating temperature by equating it to the target idling speed reduced by a fixed quantity.
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公开(公告)号：US07127346B1
公开(公告)日：2006-10-24
申请号：US11218982
申请日：2005-09-02
CPC分类号： F02D13/0219 , F02D11/105 , F02D41/1448 , F02D41/1497 , F02D2041/001 , F02D2200/0406 , F02D2200/1006 , F02D2250/18 , Y02T10/18
摘要： An engine control system that regulates operation of an engine includes an intake valve that regulates air intake into a cylinder of the engine and an exhaust valve that regulates exhaust from the cylinder. A control module determines a cylinder volume at intake valve closure and a cylinder volume at intake valve opening and calculates an intake pumping torque based on the cylinder volume at intake valve closure and the cylinder volume at intake valve opening. The control module determines a cylinder volume at exhaust valve closure and a cylinder volume at exhaust valve opening and calculates an exhaust pumping torque based on the cylinder volume at exhaust valve closure and the cylinder volume at exhaust valve opening. The control module calculates a net pumping torque based on the intake pumping torque and the exhaust pumping torque and regulates engine operation based on the net pumping torque.
摘要翻译： 调节发动机运转的发动机控制系统包括调节进入发动机气缸的空气的进气阀和调节气缸排气的排气阀。 控制模块确定进气门关闭时的气缸体积和进气门开度处的气缸体积，并基于进气门关闭时的气缸体积和进气门开度的气缸体积计算进气泵送扭矩。 控制模块确定排气门关闭时的气缸体积和排气阀开度处的气缸体积，并根据排气阀关闭时的气缸容积和排气阀开度的气缸体积计算排气泵送扭矩。 控制模块基于进气泵送扭矩和排气泵送扭矩来计算净抽油扭矩，并基于净泵送扭矩来调节发动机运转。
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