-
公开(公告)号：US08439018B2
公开(公告)日：2013-05-14
申请号：US12773251
申请日：2010-05-04
IPC分类号： F02G5/00
CPC分类号： F02M53/06
摘要： A heated fuel injector system and controller that includes a temperature sensing means to provide closed-loop control of a heating element heating fuel dispensed by a heated fuel injector. Closed-loop control provides more accurate temperature control of the heating element so that fuel heating is provided as quickly as possible while also protecting the fuel from being boiled and protecting the heated fuel injector from being damaged by excessive temperature. By monitoring how the signal from the temperature sensing means varies over time, fault conditions such as a lack of fuel flow, and fuel ethanol percentage may be detected.
摘要翻译： 一种加热燃料喷射器系统和控制器，其包括温度感测装置，以对加热燃料喷射器分配的燃料加热的加热元件进行闭环控制。 闭环控制提供对加热元件的更精确的温度控制，使得尽可能快地提供燃料加热，同时还保护燃料不被煮沸并且保护加热的燃料喷射器不被过高的温度损坏。 通过监测来自温度检测装置的信号如何随时间而变化，可以检测到诸如缺乏燃料流量和燃料乙醇百分比等故障状况。
-
公开(公告)号：US20110276252A1
公开(公告)日：2011-11-10
申请号：US12773251
申请日：2010-05-04
CPC分类号： F02M53/06
摘要： A heated fuel injector system and controller that includes a temperature sensing means to provide closed-loop control of a heating element heating fuel dispensed by a heated fuel injector. Closed-loop control provides more accurate temperature control of the heating element so that fuel heating is provided as quickly as possible while also protecting the fuel from being boiled and protecting the heated fuel injector from being damaged by excessive temperature. By monitoring how the signal from the temperature sensing means varies over time, fault conditions such as a lack of fuel flow, and fuel ethanol percentage may be detected.
摘要翻译： 一种加热燃料喷射器系统和控制器，其包括温度感测装置，以对加热燃料喷射器分配的燃料加热的加热元件进行闭环控制。 闭环控制提供对加热元件的更精确的温度控制，使得尽可能快地提供燃料加热，同时还保护燃料不被煮沸并且保护加热的燃料喷射器不被过高的温度损坏。 通过监测来自温度检测装置的信号如何随时间而变化，可以检测到诸如燃料流量不足和燃料乙醇百分数等故障状况。
-
公开(公告)号：US6019113A
公开(公告)日：2000-02-01
申请号：US178958
申请日：1998-10-26
CPC分类号： F16K31/025 , Y10T137/0318
摘要： An improved method and apparatus for opening and closing a high performance shape memory alloy (SMA) fuel injector that minimizes performance variations due to changes in ambient temperature. When opening the injector to commence fuel injection, a relatively high voltage is applied to an SMA element of the injector to quickly heat the element to its high temperature state, quickly opening the valve. The current level is monitored as a measure of the element resistivity, and when the determined resistivity indicates that the high temperature state transition is complete, the voltage is reduced to a hold value, sufficient to continue resistivity measurement. When the determined resistivity indicates that the element is beginning to transition back to the ambient temperature state, the high voltage is re-applied to begin a new control cycle. To close the injector, the electric heating is discontinued, and fuel circulating through the injector cools the element to its ambient temperature state. The variability in opening response is reduced because the high voltage is significantly higher than a voltage that would thermally damage the SMA element if sustained, and the resistivity feedback during application of the high voltage is used to control the timing of the current reduction. The variability in closing response is reduced by the repeated switching between high and low voltage control, which controls the temperature of the element, and thereby maintains the element in a state of readiness to return to the ambient temperature state. Additionally, the repeated switching between high and low voltage control limits the peak temperature of the SMA element, and prevents damage to the element if the circulating fuel fails to adequately cool the element. Finally, the use of current measurement in the control circuit permits reliable determination of the resistivity of the SMA element without requiring external thermal sensors.
-
公开(公告)号：US5651353A
公开(公告)日：1997-07-29
申请号：US647844
申请日：1996-05-03
申请人： Brian Keith Allston
发明人： Brian Keith Allston
CPC分类号： F02D41/0085 , F02D41/1443 , F02D41/2454
摘要： Internal combustion engine air/fuel ratio control provides for individual engine cylinder air/fuel ratio balancing through sensing of individual cylinder air/fuel ratio and through comparison of sensed individual cylinder air/fuel ratio to a target air/fuel ratio with air/fuel ratio control command correction prescribed on a cylinder-by-cylinder basis. The target air/fuel ratio may be determined as an overall average cylinder actual air/fuel ratio. An additional control loop is provided for driving a value representing overall engine air/fuel ratio toward a desired air/fuel ratio, such as the stoichiometric ratio. Correction values are learned gradually for each engine cylinder and stored and recalled as a function of an engine operating level.
摘要翻译： 内燃机空气/燃料比控制通过检测单个气缸空气/燃料比来提供单独的发动机气缸空气/燃料比平衡，并且通过将感测的单独气缸空气/燃料比与目标空气/燃料比与空气/燃料比进行比较 以缸为单位规定的控制指令校正。 目标空燃比可以被确定为整体平均气缸实际空气/燃料比。 提供了一个额外的控制回路，用于将表示整个发动机空气/燃料比的值朝向期望的空气/燃料比例如化学计量比进行驱动。 对于每个发动机气缸逐渐了解校正值，并作为发动机工作水平的函数进行存储和调用。
-
-
-
搜索结果
4 条记录 (耗时 0.027 秒)
