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style="margin-top: 20px;" class="wlcontent"> <div style="width:100%;text-align:center;margin:20px auto;"> <img src="upfile/2018/06/20180619101554_989.jpg" style="max-width:100%;" alt="車用尿素水,車用尿素溶液" /> </div> <p class="MsoNormal" style="margin: 7.5pt 0pt; text-indent: 0pt; padding: 0pt; line-height: 18.75pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="font-family: Tahoma; color: #333333; letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="font-family: Tahoma;">一種是閉環控制是指</span>ECU通過各傳感器反饋的控制結果與期望值比較，及時調整預先設定的值給出最優化的尿素噴射量。主要通過催化器下游NOx。氣體和排氣溫度、空速等來實現反饋調節。</span><span style="font-family: Tahoma; color: #333333; letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><br /></span><span style="font-family: Tahoma; color: #333333; letter-spacing: 0pt; font-size: 10.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> 而另一個則是開環控制是指不將控制后的結果反饋回來而修改當前控制系統的設置，即尿素噴射量是預先設定好的，沒有反饋信號，不受催化器出口NOx或NH3等氣體濃度值的影響。一般它的試驗標定主要是通過目標轉化率等經驗來設定噴射量的不同數值，然后由發動機的臺架試驗來驗證排放是否能達到預期的目標值。</span><span style="font-family: Tahoma; color: #333333; letter-spacing: 0pt; font-size: 10.5pt;"></span></p> <p class="MsoNormal" style="margin: 0pt; text-indent: 0pt; border-top: 1pt dotted #dddddd; border-bottom: 1pt dotted #dddddd; padding: 0pt; line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="font-family: Tahoma; color: #333333; letter-spacing: 0pt; font-size: 9pt;"> </span></p> </div> </div> </div> </div> </div>  <div id="footer"> <div class="mbot cl"> <div class="mbotcon"> <p>揚州蔚蘭環?？萍加邢薰?/p> <p>地址：揚州市高郵市城南工業區 </p> <p>電話:13013785615 17715105778 郵箱：chinaweilan@163.com</p> <p> 版權所有：揚州蔚蘭環?？萍加邢薰? 備案號: <a target="_blank">蘇ICP備16050586號</a> 網站域名：<a href="http://www.1070999.com" target="_self">http://www.1070999.com</a> </p> <p><a href="http://www.1070999.com">車用尿素水</a>,<a href="http://www.1070999.com">車用尿素溶液</a>,<a href="http://www.1070999.com">柴油車用尿素水</a>,<a href="http://www.1070999.com">國四車專用尿素水</a>,<a href="http://www.1070999.com">車用尿素水生產廠家</a></p> <p>專注優質車用尿素原料出口，提供一站式車用尿素溶液解決方案，為公交交運系統，重卡車隊和卡車生產企業等的車用尿素溶液成本降低60%以上。</p> </div> <div class="botewm"><img 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