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    • 1. 发明授权
    • System and method for controlling fuel injections
    • 控制燃油喷射的系统和方法
    • US06516782B1
    • 2003-02-11
    • US09321028
    • 1999-05-27
    • Eric D. Thomas
    • Eric D. Thomas
    • F02D4140
    • F02D41/3836F02D41/3827F02D41/3845F02D41/403F02D2250/18Y02T10/44
    • A method for controlling fuel delivery from a fuel injector includes determining a first desired engine torque output; determining engine speed; determining a first quantity of fuel to be delivered by the fuel injector based on the first desired engine torque output and the engine speed; determining an injection pressure; and determining a first amount of time for energizing the fuel injector in order to deliver the first quantity of fuel based on the injection pressure. For a system capable of split injection, the method further includes determining a second desired engine torque output; determining a second quantity of fuel to be delivered by the fuel injector based on the second desired engine torque output and the engine speed; and determining a second amount of time for energizing the fuel injector in order to deliver the second quantity of fuel. The method and system of the invention provide more precise control of fuel delivery compared with prior systems and methods.
    • 用于控制来自燃料喷射器的燃料输送的方法包括确定第一期望的发动机扭矩输出; 确定发动机转速; 基于所述第一期望的发动机转矩输出和所述发动机转速确定由所述燃料喷射器输送的第一燃料量; 确定注射压力; 以及确定用于激励所述燃料喷射器的第一时间量,以便基于所述喷射压力输送所述第一量的燃料。 对于能够分裂喷射的系统,该方法还包括确定第二期望的发动机扭矩输出; 基于所述第二期望的发动机扭矩输出和所述发动机转速来确定由所述燃料喷射器输送的第二量的燃料; 以及确定用于激励所述燃料喷射器以便传送所述第二量的燃料的第二时间量。 与现有系统和方法相比,本发明的方法和系统提供了对燃料输送的更精确的控制。
    • 4. 发明授权
    • System and method for detecting cold engine operation
    • 冷发动机运行检测系统及方法
    • US06243642B1
    • 2001-06-05
    • US09282526
    • 1999-03-31
    • Eric D. Thomas
    • Eric D. Thomas
    • G06F1900
    • F02D41/064F01P7/048F01P7/12F01P7/164F01P7/167F01P2025/08F01P2025/13F01P2025/42F01P2060/02F02B29/0443F02B29/0493Y02T10/146
    • A system and method for detecting cold engine operation include determining at least two fluid temperatures and providing an output signal based on the at least two temperatures. Preferably, an engine coolant temperature, an intercooler temperature, and an engine air temperature are determined via appropriate temperature sensors. In one embodiment, the cold engine output signal is activated or asserted if any one of the at least two fluid temperatures is below a corresponding temperature threshold. The cold engine output signal is deactivated when all of the fluid temperatures are above corresponding temperature thresholds (plus hysteresis where applicable). An optional user-selectable parameter provides for actuation of the cold engine output only during idle. The cold engine output signal may be used to control various accessories including coolant heating systems, shutters, or the like. Additional parasitic loads or an exhaust brake may be actuated to increase combustion temperatures by increasing engine load to reduce or eliminate white smoke.
    • 用于检测冷发动机操作的系统和方法包括确定至少两个流体温度并基于所述至少两个温度提供输出信号。 优选地,通过适当的温度传感器确定发动机冷却剂温度,中间冷却器温度和发动机空气温度。 在一个实施例中,如果至少两个流体温度中的任何一个低于相应的温度阈值,则冷机输出信号被激活或断言。 当所有流体温度高于相应的温度阈值(如果适用)时加上滞后),冷启动器输出信号被停用。 可选的用户可选参数仅在空转期间提供冷引擎输出的启动。 冷发动机输出信号可用于控制各种附件,包括冷却剂加热系统,百叶窗等。 可以通过增加发动机负荷来致动附加的寄生负载或排气制动器来增加燃烧温度以减少或消除白烟。
    • 5. 发明授权
    • System and method for detecting engine malfunction based on crankcase pressure
    • 基于曲轴箱压力检测发动机故障的系统和方法
    • US06240772B1
    • 2001-06-05
    • US09207931
    • 1998-12-09
    • Eric D. Thomas
    • Eric D. Thomas
    • G01L326
    • G01M15/09F01M11/10F01M13/00
    • A system and method for detecting engine malfunctions based on crankcase pressure include determining a reference value indicative of current engine operating conditions and using the reference value to determine a crankcase pressure limit which varies as a function of the reference value. The sensed crankcase pressure is compared to the limit to determine when a fault condition exists. The reference value is preferably a function of engine speed and requested engine torque and includes a second order term multiplied by a calibratable constant which controls sensitivity of the fault determination. The sensitivity may be adjusted to provide equally detectable faults across all engine speeds and loads, to be more sensitive to faults occurring at higher engine speeds, or to be more sensitive to faults occurring at higher engine loads. The system and method control the engine based on the determination of an engine fault. Subsequent control may include alerting the vehicle operator, reducing available engine torque, stopping the engine and/or logging a fault for subsequent service or maintenance. Early cylinder/piston fault detection provides more time for the vehicle operator and/or the engine controller to take remedial actions to prevent more serious engine damage.
    • 用于基于曲轴箱压力检测发动机故障的系统和方法包括确定指示当前发动机操作条件的参考值,并使用参考值来确定作为参考值的函数而变化的曲轴箱压力极限。 将感测到的曲轴箱压力与极限进行比较,以确定故障情况何时存在。 参考值优选地是发动机速度和要求的发动机扭矩的函数,并且包括乘以可校准常数的二阶项,其控制故障确定的灵敏度。 可以调节灵敏度以在所有发动机速度和负载上提供同等可检测的故障,以便在较高发动机速度下发生的故障更敏感,或者对于在较高发动机负载下发生的故障更敏感。 该系统和方法根据发动机故障的确定来控制发动机。 随后的控制可以包括警告车辆操作者,减少可用的发动机转矩,停止发动机和/或记录故障以进行后续的维护或维护。 早期的气缸/活塞故障检测为车辆操作员和/或发动机控制器提供了更多的时间来采取补救措施来防止更严重的发动机损坏。
    • 8. 发明授权
    • Controller and storage medium for detecting cold engine operation
    • US06445997B1
    • 2002-09-03
    • US09829090
    • 2001-04-09
    • Eric D. Thomas
    • Eric D. Thomas
    • G06F1900
    • An engine controller and computer readable storage medium for detecting cold engine operation include determining at least two fluid temperatures and providing an output signal based on the at least two temperatures. Preferably, an engine coolant temperature, an intercooler temperature, and an engine air temperature are determined via appropriate temperature sensors. In one embodiment, the cold engine output signal is activated or asserted if any one of the at least two fluid temperatures is below a corresponding temperature threshold. The cold engine output signal is deactivated when all of the fluid temperatures are above corresponding temperature thresholds (plus hysteresis where applicable). An optional user-selectable parameter provides for actuation of the cold engine output only during idle. The cold engine output signal may be used to control various accessories including coolant heating systems, shutters, or the like. Additional parasitic loads or an exhaust brake may be actuated to increase combustion temperatures by increasing engine load to reduce or eliminate white smoke.
    • 10. 发明授权
    • System and method for enhanced engine monitoring and protection
    • 用于增强发动机监控和保护的系统和方法
    • US6131539A
    • 2000-10-17
    • US345052
    • 1999-06-30
    • Eric D. Thomas
    • Eric D. Thomas
    • F02D45/00F01M1/22F01P11/18F02D41/22F01P5/14
    • F01P11/18F01M1/22F02D41/22F01P2025/04F01P2025/62F01P2025/64F01P2031/22Y02T10/40
    • A system and method for monitoring and controlling an engine based on an engine fluid pressure include sensing an engine fluid pressure, determining a current value for an engine operating parameter, determining whether the engine fluid pressure has crossed a first threshold corresponding to the current value of the engine operating parameter, determining whether the engine fluid pressure has crossed a second threshold corresponding to the current value of the engine operating parameter, generating a warning signal when the fluid pressure has crossed the first threshold but has not crossed the second threshold, and generating a shutdown signal when the fluid pressure has crossed the second threshold. In one embodiment, the second threshold is determined based on the first threshold by applying a constant offset value.
    • 基于发动机流体压力监测和控制发动机的系统和方法包括检测发动机流体压力,确定发动机运转参数的当前值,确定发动机流体压力是否已经超过对应于当前值的第一阈值 发动机操作参数,确定发动机流体压力是否已经超过对应于发动机运转参数的当前值的第二阈值,当流体压力已超过第一阈值但未超过第二阈值时产生警告信号,并产生 当流体压力超过第二阈值时的关闭信号。 在一个实施例中,通过应用恒定偏移值,基于第一阈值确定第二阈值。