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    • 14. 发明授权
    • Electro-hydraulic engine valve actuation
    • 电动液压发动机气门启动
    • US07040266B1
    • 2006-05-09
    • US11206603
    • 2005-08-18
    • Zongxuan SunRodney B. Rask
    • Zongxuan SunRodney B. Rask
    • F01L1/34
    • F01L9/02
    • Electro-hydraulic engine valve actuation system providing an actuator and an actuator control system. The actuator includes primary and secondary actuation chambers, defined by a piston, connected to the engine valve, and characterized by increasing and correspondingly decreasing chamber volumes, as the piston is urged away from neutral position. A fluid inlet is connected to a flow control valve. A control valve includes an actuator, and has flow states for controlling flow between two fluid inlets and a fluid outlet. The control valve includes first and second opposed, control chambers, each connected to the actuator. There is a spring in the second control chamber. The actuator of the flow control valve is controlled to a first and second state, and there is an electrically uncontrolled third flow state. There is a pair of temperature-compensated orifices which create internal feedback, with the control chambers, between the engine valve motion and the control valve position.
    • 提供致动器和致动器控制系统的电动液压发动机气门致动系统。 致动器包括由活塞限定的主动和辅助致动腔室,其连接到发动机气门,并且其特征在于当活塞被迫远离中立位置时增加并相应地减小腔室容积。 流体入口连接到流量控制阀。 控制阀包括致动器,并且具有用于控制两个流体入口和流体出口之间的流动的流动状态。 控制阀包括第一和第二相对的控制室,每个都连接到致动器。 第二个控制室内有一个弹簧。 流量控制阀的致动器被控制到第一和第二状态,并且存在电不受控制的第三流动状态。 有一对温度补偿孔,通过控制室在发动机气门运动和控制阀位置之间产生内部反馈。
    • 16. 发明授权
    • Method and apparatus for measuring mass airflow
    • 测量质量气流的方法和装置
    • US4463601A
    • 1984-08-07
    • US496953
    • 1983-05-23
    • Rodney B. Rask
    • Rodney B. Rask
    • F02D41/18G01F1/684G01F1/72G01F1/76G01F7/00
    • F02D41/187G01F1/6842G01F1/72
    • Where airflow through a system is subject to forward and reverse flow, the mass airflow rate is determined by providing two flow branches A and B meeting at a junction wherein the two branches carry different proportions of airflow in the forward and reverse directions and branch B carries a greater fraction of the airflow during reverse flow than during forward flow. An airflow sensor in each branch measures the airflow irrespective of flow direction to obtain mass flow rate signals R.sub.A and R.sub.B for branches A and B, respectively. The mass airflow rate m is calculated from the equation m=K.sub.A R.sub.A -K.sub.B R.sub.B where m, K.sub.A and K.sub.B are constants for a given apparatus which are determined by each sensor characteristic and the flow characteristics of the junction. The resultant mass flow rate signal m will have a positive or negative sign indicative of forward or reverse flow. Integrating the value m over a time period and dividing by the time period yields the average mass airflow rate for the period.This method and apparatus can be used to obtain accurate induction airflow measurements for internal combustion engines.
    • 在通过系统的气流经受正向和反向流动的情况下,通过在两个分支处在正向和反向方向上携带不同比例的气流的分支处提供两个流动分支A和B来确定质量气流速率,而分支B携带 反向流动期间气流比正向流动期间更大的一部分。 每个分支中的气流传感器测量气流而不考虑流动方向,以分别获得分支A和B的质量流量信号RA和RB。 质量气流速率m由等式m = KA RA-KB RB计算,其中m,KA和KB是由每个传感器特性和结点的流动特性确定的给定装置的常数。 所得到的质量流量信号m将具有指示正向或反向流动的正或负符号。 将时间段上的值m与时间段进行积分,得出该期间的平均质量气流率。 该方法和装置可用于获得内燃机的精确的感应气流测量。