公开(公告)号：US4031747A

公开(公告)日：1977-06-28

申请号：US714143

申请日：1976-08-16

Applicant: John David Blanke

Inventor： John David Blanke

IPC: G01M15/10 ,  G01N27/406 ,  G01N27/417 ,  G01N33/00 ,  G01M15/00

CPC classification number: G01M15/104 ,  G01N27/4065 ,  G01N27/4175 ,  G01N33/0067

Abstract: An improvement to a misfire monitor sensing lean-roll in an internal combustion engine by comparing the rate of change in O.sub.2 in the exhaust gases with respect to time against a limit is disclosed. In the preferred embodiment, the sensed O.sub.2 level in the exhaust is used as an input to rescaling means which automatically normalizes the values used in the comparison to a standard range. Normalization is accomplished alternately by rescaling the rate of change value, rescaling the limit value used, or diluting the exhaust gases sampled to the level of a "standard" air blown engine to which the comparison limit is scaled.

Abstract translation: 公开了通过将废气中的O 2的变化率相对于时间相对于极限进行比较来对内燃机中的偏转辊进行感测的改进。 在优选实施例中，排气中感测到的氧气水平被用作重新缩放装置的输入，自动将比较中使用的值自动归一化为标准范围。 通过重新调整变化率值，重新调整所使用的极限值或将采样的废气稀释到比较限制被缩放到的“标准”吹风发动机的水平，交替地实现归一化。

公开(公告)号：US3970430A

公开(公告)日：1976-07-20

申请号：US515709

申请日：1974-10-17

Applicant: John R. Reader, Jr. ,  James L. Seago ,  James A. Williamson, Jr.

Inventor： John R. Reader, Jr. ,  James L. Seago ,  James A. Williamson, Jr.

IPC: G01N21/31 ,  G01N21/27 ,  G01N21/77 ,  G01N31/00 ,  G01N33/00 ,  G01N21/24 ,  G01J1/42

CPC classification number: G01N33/0013 ,  G01N21/272 ,  G01N33/0067 ,  Y10T436/177692

Abstract: Apparatus and method for NO.sub.x analysis in which a sample gas is introduced into a sample cell and mixed with oxygen to induce conversion of NO to NO.sub.2. After a given time, prior to complete conversion of NO to NO.sub.2, the absorbance and the time rate of change of absorbance is measured. The time rate of change of absorbance is indicative of the initial NO concentration in the sample gas; and the sum of the absorbance and the time rate of change of absorbance is indicative of the initial NO.sub.x concentration in the gas. A better indication of the initial NO.sub.x concentration can be obtained from the sum of the absorbance and the square root of the time rate of change of absorbance.

Abstract translation: 用于NOx分析的装置和方法，其中将样品气体引入样品池并与氧混合以诱导NO转化为NO 2。 给定时间后，在NO完全转化为NO2之前，测量吸光度和吸光度变化的时间变化率。 吸光度的时间变化率表示样品气体中初始的NO浓度; 吸光度和时间变化率的总和表示气体中的初始NOx浓度。 可以从吸光度的变化率的吸光度和平方根的总和获得初始NOx浓度的更好的指示。