초록 ▼

An internal combustion engine is provided with a variable valve train capable of altering opening and closing timings and/or opening amounts of at least one of an intake valve and an exhaust valve of an internal combustion engine. The internal combustion engine is characterized in that the internal

An internal combustion engine is provided with a variable valve train capable of altering opening and closing timings and/or opening amounts of at least one of an intake valve and an exhaust valve of an internal combustion engine. The internal combustion engine is characterized in that the internal combustion engine is further provided with a negative pressure mechanism that operates using intake pipe negative pressure generated in an intake passage of the internal combustion engine, a throttle valve for adjusting the flow rate of intake air flowing through the intake passage, and negative pressure generating device that controls at least one of the variable valve train and the throttle valve to generate the intake pipe negative pressure, when the intake pipe negative pressure for operation of the negative pressure mechanism is insufficient.

대표청구항 ▼

1. An internal combustion engine comprising:a variable valve train capable of adjusting at least one of an opening and closing timing and an opening amount of at least one of an intake valve and an exhaust valve of the internal combustion engine; a negative pressure mechanism that operates using an

1. An internal combustion engine comprising:a variable valve train capable of adjusting at least one of an opening and closing timing and an opening amount of at least one of an intake valve and an exhaust valve of the internal combustion engine; a negative pressure mechanism that operates using an intake pipe negative pressure generated in an intake passage of the internal combustion engine; a throttle valve for adjusting a flow rate of intake air flowing through the intake passage; and a negative pressure generating device that controls at least one of the variable valve train and the throttle valve to generate an intake pipe negative pressure when a predetermined condition is satisfied, wherein the negative pressure generating device controls the variable valve train so as to increase pump efficiency of the internal combustion engine and also closes the throttle valve by a predetermined amount, when a negative pressure for operation of the negative pressure mechanism is insufficient.