Record Display for the EPA National Library Catalog


Main Title Knock sensor vehicle test program /
Author Landman, Larry C.
CORP Author Environmental Protection Agency, Ann Arbor, MI. Control Technology Assessment and Characterization Branch.
Publisher Environmental Protection Agency, Emission Control Technology Division, Control Technology Assessment and Characterization Branch,
Year Published 1981
Report Number EPA-AA-CTAB/TA-82-1
Stock Number PB82-139478
OCLC Number 37047695
Subjects Automobiles--Ignition ; Automobiles--Motors--Superchargers
Additional Subjects Automobiles ; Exhaust emissions ; Fuel consumption ; Superchargers ; Turbomachinery ; Ignition systems ; Knock ; Octane number ; Performance evaluation ; General Motors vehicles ; Knock sensors
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA AA-CTAB-TA-82-1 AWBERC Library/Cincinnati,OH 12/20/2023
ELCD  EPA AA-CTAB-TA-82-1 NVFEL Library/Ann Arbor, MI 02/22/2011 DISPERSAL
NTIS  PB82-139478 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 51 pages : illustrations ; 28 cm
This test program was designed to explore the impact of an ignition system with spark knock sensoring and spark retard on regulated emissions, fuel economy, and power as a function of the research octane number (RON) of the test fuel. Currently, General Motors (GM) incorporates a spark knock sensor in a feedback ignition system on their turbocharged vehicles. This type of spark timing system is well suited to turbocharged engines because of their wide range of spark timing requirements. GM and others are also currently producing naturally aspirated engines equipped with knock sensors. The feedback aspect of this type of ignition system would allow the vehicle to automatically compensate the timing for the octane of the fuel being consumed. This technology could improve fuel economy of vehicles in service. It is conceivable that some vehicles incorporating a knock sensor timing system could have lower exhaust emissions and higher fuel economy using EPA standard test fuel (Indolene HO III) compared to operating with lower octane commercial unleaded gasolines. The knock sensor can be integrated into a spark timing system in a variety of fashions. This design variability precludes any generalized conclusions about the effects of varying the fuel octane rating.
Includes bibliographical references. "October, 1981."