Exhaust gas cleaning apparatus of an internal combustion engine

Patent · Tue Apr 24 04:00:00 EST 1979

OSTI ID:6104495

Yamakawa, Y; Fukumori, Y

Disclosed is an exhaust gas cleaning apparatus of an internal combustion engine, provided with a three-way catalytic converter and a vacuum-operated flow control valve. The flow control valve has a diaphragm for controlling the amount of secondary air directed into an exhaust manifold of the engine for the effective operation of the three-way catalytic converter. In order to move the diaphragm to increase or decrease the amount of secondary air, a vacuum chamber is formed on one side of the diaphragm. This vacuum chamber is opened to a vacuum port formed in the intake system of the engine for transmitting the vacuum signal from the port to the vacuum chamber. Further, in order to maintain a constant rate of movement of the diaphragm irrespective of the vacuum level at the port, means are provided for transmitting a vacuum signal from the port to another vacuum chamber formed on the other side of the diaphragm.

• Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
• Patent Number(s): US 4150541
• OSTI ID: 6104495
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330700* -- Advanced Propulsion Systems-- Emission Control
CATALYTIC CONVERTERS
DESIGN
ENGINES
EQUIPMENT
EXHAUST GASES
GASEOUS WASTES
INTERNAL COMBUSTION ENGINES
POLLUTION CONTROL EQUIPMENT
WASTES