Power plants – Internal combustion engine with treatment or handling of... – Having means analyzing composition of exhaust gas
Patent
1977-06-09
1979-02-06
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Having means analyzing composition of exhaust gas
60289, F02B 7510, F01N 315
Patent
active
041377141
ABSTRACT:
An internal combustion engine having an exhaust system provided with exhaust gas purifying means and secondary air supplying means disposed upstream thereof includes a secondary air supply control system comprising vacuum introducing means adapted to introduce and reserve the vacuum from an intake manifold vacuum port; secondary air switching means including two diaphragm means and a valve mechanism linked therewith; information processing means adapted to process the information from an O.sub.2 sensor and an acceleration detector and issue selective commands; and vacuum switching means including two vacuum switching valves to be controlled by the command associated with the O.sub.2 sensor, and an additional vacuum valve disposed between each of the two vacuum switching valves and two atmosphere openings of the valve which are provided with respective orifices of different throttling capabilities, both additional vacuum valves being adapted to be controlled by the command associated with the acceleration detector.
REFERENCES:
patent: 3911674 (1975-10-01), Goto
patent: 3931710 (1976-01-01), Hartel
patent: 3962867 (1976-06-01), Ikeura
patent: 4068472 (1978-01-01), Takata
Miyagi Hideo
Takeda Keiso
Hart Douglas
Toyota Jidosha Kogyo Kabushiki Kaisha
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