[Code of Federal Regulations]

[Title 40, Volume 31]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR1065.284]



[Page 710]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 1065_ENGINE-TESTING PROCEDURES--Table of Contents

 

                    Subpart C_Measurement Instruments

 

Sec.  1065.284  Zirconia (ZrO[bdi2]) analyzer.



    (a) Application. You may use a zirconia (ZrO2) analyzer 

to measure air-to-fuel ratio in raw exhaust for continuous sampling. You 

may use O2 measurements with intake air or fuel flow 

measurements to calculate exhaust flow rate according to Sec.  1065.650.

    (b) Component requirements. We recommend that you use a 

ZrO2 analyzer that meets the specifications in Table 1 of 

Sec.  1065.205. Note that your ZrO2-based system must meet 

the linearity verification in Sec.  1065.307. You may use a Zirconia 

analyzer that has compensation algorithms that are functions of other 

gaseous measurements and the engine's known or assumed fuel properties. 

The target value for any compensation algorithm is 0.0% (that is, no 

bias high and no bias low), regardless of the uncompensated signal's 

bias.



                             PM Measurements