Internal-combustion engines – Engine speed regulator – Having plural throttle valve structure
Reexamination Certificate
2006-08-30
2010-11-16
Kwon, John T (Department: 3747)
Internal-combustion engines
Engine speed regulator
Having plural throttle valve structure
C123S337000, C123S478000
Reexamination Certificate
active
07832373
ABSTRACT:
A valve control apparatus of a diesel engine (1) is provided with an EGR valve (30), which is provided in an EGR passage (26) of the engine (1) and varies the flow rate of exhaust gas flowing through a passage (26) by carrying out an opening and closing motion, and an actuator (28), which executes a sticking avoiding operation for dissolving or preventing a sticking of a valve (30) by causing the valve (30) to move to and fro so as to open and close the valve (30) by a predetermined moving amount respectively in one direction and the other direction near a full-close position of the valve (30). The apparatus inhibits the sticking avoiding operation by the actuator (28) when an ignition OFF operation is carried out without starting an operation of the engine (1) after an ignition ON operation is carried out. As a result, it is possible to prevent a useless valve opening and closing motion and achieve power saving.
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Kwon John T
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Toyota Jidosha & Kabushiki Kaisha
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