NISSAN ECCS (MICROPROCESSOR CONTROL SYSTEM) BOOSTS FUEL ECONOMY

A microprocessor in the Nissan ECCS (Electronic Concentrated Engine Control System) has contributed to better fuel economy and lower exhaust emission levels. Fuel, spark timing, exhaust gas recirculation (EGR) rate, and idle speed are centrally controlled in response to the engine's various operating conditions. This system is especially beneficial during low engine speed and light load conditions. The amount of fuel fed to the engine is feedback-controlled, using an oxygen sensor to obtain the maximum performance of the three-way catalyst. The spark-timing and EGR rate are brought to predetermined values by the microprocessor for most economical fuel consumption and optimum exhaust emissions. When the ECCS was installed in an in-line six-cylinder, 2.8 L engine mounted in a vehicle of the 3500 lb. inertia weight class, the vehicle fully complied with the Japanese exhaust emission standards at a 10% improvement in fuel economy, while maintaining good driveability. ECCS also improves engine performance (e.g. cold start and warm-up characteristics) and reduces required engine tuning and maintenance.

• Supplemental Notes:
  • Published in HS-805 233 (TRIS 361554), "International Automotive Fuel Economy Research Conference (1st) Proceedings," Washington, D.C., 1980, pp 212-9. Conference held October 31-November 2, 1979.
• Corporate Authors:

  Nissan Motor Company, Limited

  17-1 Ginza 6-chome, Chuo-ku
  Tokyo 104,   Japan 
• Authors:
  • Hata, Y
  • AONO, S
  • Sasaki, K
• Publication Date: 1980

Media Info

• Features: References;
• Pagination: 8 p.

Subject/Index Terms

• TRT Terms: Cold starts (Driving); Exhaust gases; Fuel consumption; Microprocessors; Performance; Vehicle power plants
• Old TRIS Terms: Automobile engines; Cold start
• Subject Areas: Energy; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00370538
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: HS-031 360
• Files: HSL, USDOT
• Created Date: Feb 28 1983 12:00AM