Method and apparatus repetitively controlling the compositon of exhaust emissions from internal combustion engines, in predetermined intervals

Patent · Tue Nov 18 04:00:00 EST 1975

OSTI ID:7199829

Wahl, J; Schmidt, P J; Zechnall, R

Certain intervals are determined in which output signals from an exhaust gas sensing device are sensed, and then applied to a control circuit, to control the fuel supply system (carburetor, or fuel injection system) in such a direction that a predetermined ratio of fuel and air is being supplied to the engine to provide exhaust gases of predetermined composition. The intervals are determined by a logic circuit which monitors engine operating parameters such as operating time of the engine after having been started, engine speed, engine power condition (idling, or supplying power), engine temperature, or the like. (auth)

• Assignee: Robert Bosch GmbH
• Patent Number(s): US 3919983
• OSTI ID: 7199829
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330603 -- Vehicle Design Factors-- Engine System
330700* -- Advanced Propulsion Systems-- Emission Control
AIR
AUTOMOBILES
AUTOMOTIVE FUELS
DESIGN
ELECTRONIC CIRCUITS
ENGINES
EXHAUST GASES
FEEDBACK
FLUIDS
FUEL SYSTEMS
FUELS
GASEOUS WASTES
GASES
INTERNAL COMBUSTION ENGINES
LOGIC CIRCUITS
MIXING RATIO
MONITORING
VEHICLES
WASTES