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    • 227. 发明授权
    • Air-fuel ratio controlling apparatus for an engine
    • 发动机空燃比控制装置
    • US07377262B2
    • 2008-05-27
    • US11703211
    • 2007-02-07
    • Hideyuki OkiShusuke AkazakiYuji Yamamoto
    • Hideyuki OkiShusuke AkazakiYuji Yamamoto
    • F02D41/14
    • F02D35/028F02D35/023F02D41/0085F02D41/1458
    • An air-fuel ratio controlling apparatus includes an internal pressure detector for detecting an internal pressure of a combustion chamber of the engine. The apparatus estimates a motoring pressure of the engine and determines a start-of-combustion time, a time point when a difference between the internal pressure and the motoring pressure exceeds a predetermined value in a compression stroke and a combustion stroke of the engine. Firing delay for each cylinder is calculated from as a duration from sparking to the start-of-combustion time. Air-fuel ratio of each cylinder is estimated based on the firing delay and fuel injection amount for each cylinder is calculated to make the air-fuel ratio of plural cylinders uniform.
    • 空燃比控制装置包括用于检测发动机的燃烧室的内部压力的内部压力检测器。 该装置估计发动机的运转压力,并且确定起动燃烧时间,即内压和电动压力之间的差在发动机的压缩冲程和燃烧冲程中超过预定值的时间点。 从火花到燃烧时间的持续时间计算每个气缸的燃烧延迟。 基于燃烧延迟来估算每个气缸的空燃比,并计算每个气缸的燃料喷射量,以使多个气缸的空燃比均匀。
    • 228. 发明申请
    • Phase Synthesizing Diversity Receiver
    • 相位合成分集接收机
    • US20080031389A1
    • 2008-02-07
    • US11658019
    • 2005-07-06
    • Yuji Yamamoto
    • Yuji Yamamoto
    • H04L1/02
    • H04B7/084
    • This invention is to provide a receiver and a reception method capable of improving a reception quality with respect to both FM modulation wave and AM modulation wave, and ensuring an effective receiver even under a flat fading or a frequency selective fading. The receiver comprises: an adaptation synthesizing section ADF which receives modulation signals IFA and IFB outputted from receiving sections RXa and RXb, and performs an adaptation processing in an adaptation filter to generate a modulation signal Y(t) as a prediction signal; feature extraction units 30, 40 for feature-extracting envelopes of modulation signals IFA, IFB and outputting feature extraction signals Eva, EVb; an adder unit 50 for adding together the feature extraction signals Eva, EVb and generating an addition feature extraction signal Esum; and a tap coefficient altering unit 60 for adjusting tap coefficient of the adaptation filter of the adaptation synthesizing section so as to approximate the modulation signal Y(t) to the addition feature extraction signal Esum. When the modulation signals IFA, IFB are AM-modulated signals, a pass frequency band of the feature extraction units 30, 40 is switched over to a cut-off frequency f1 which is higher than a frequency band of an AM-demodulated signal Sd. When the modulation signals are FM-modulated signals, a pass frequency band of the feature extraction units 30, 40 is switched over to a cut-off frequency f2 which is lower than an AM altering frequency generated due to a frequency selective fading of the modulation signals IFA, IFB.
    • 本发明提供一种能够提高FM调制波和AM调制波两者的接收质量的接收机和接收方法,即使在平坦衰落或频率选择性衰落下也能确保有效的接收机。 接收机包括:自适应合成部分ADF,其接收从接收部分RXa和RXb输出的调制信号IFA和IFB,并在自适应滤波器中执行自适应处理,以产生调制信号Y(t)作为预测信号; 特征提取单元30,40,用于特征提取调制信号IFA,IFB的包络和输出特征提取信号Eva,EVb; 加法器单元50,用于将特征提取信号Eva,EVb相加并生成相加特征提取信号Esum; 以及用于调整自适应合成部分的自适应滤波器的抽头系数以便将调制信号Y(t)近似为加法特征提取信号Esum的抽头系数改变单元60。 当调制信号IFA,IFB为AM调制信号时,特征提取单元30,40的通过频带切换到比AM解调信号Sd的频带高的截止频率f 1 。 当调制信号是FM调制信号时,特征提取单元30,40的通过频带被切换到截止频率f 2,该截止频率f 2低于由于频率选择性衰落而产生的AM改变频率 调制信号IFA,IFB。