Intake system of internal combustion engine
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United States of America Patent
Stats
-
May 1, 1984
Grant Date -
N/A
app pub date -
Jan 25, 1983
filing date -
Feb 15, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An intake system of an internal combustion engine including a power cylinder having an intake valve and a fuel injection nozzle, comprising: a throttle chamber upstream open to the atmosphere; primary and secondary throttle valves provided in parallel with each other in the throttle chamber; primary and secondary air passageways leading from the throttle chamber past the primary and secondary throttle valves, respectively, and conjoined together upstream of the intake valve, the secondary passageway being larger in cross sectional area than the primary air passageway and having a reservoir chamber portion larger in cross sectional area than the remaining portion of the secondary passageway; and air heating means provided in the primary air intake pipe and operative to preheat the air to be passed through the primary air intake pipe.
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