Device for controlling number of operating cylinders of an internal combustion engine
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United States of America Patent
Stats
-
Oct 8, 1996
Grant Date -
N/A
app pub date -
Jun 2, 1995
filing date -
Jun 10, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for controlling a partial number of engine cylinders employs a geneva movement, intake-air-cutoff valves, an exhaust-gas-cutoff valve and a DC motor. The geneva movement divides the driving force of the DC motor into two: a force intermittently driving the intake-air-cutoff valves and a force driving the exhaust-gas-cutoff valve, so that the exhaust-gas-cutoff valve cannot open until the intake-air-cutoff valve has closed when the engine operation is changed over to a partial-cylinder-operation mode, and the intake-air-cutoff valve cannot open until the exhaust-gas-cutoff valve has closed when the engine operation is changed over to the full-cylinder-operation mode. As a result, time required for changeover of the engine operation between the full-cylinder operation and the partial-cylinder operation is minnimized and additional driving unit is omitted.
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