| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an internal combustion engine with turbocharger, which does not cause defective engine running even if defective operation is caused in an exhaust throttle valve. SOLUTION: An exhaust throttle valve 40 is arranged in an exhaust manifold 31 upper-stream of a turbocharger 10 and is supplied with negative pressure when a negative pressure control valve 70 is opened when the temperature of the cooling water of an engine is lower than the specified value previously set to throttle the flow passage in the exhaust manifold 31. When a flow passage is throttled to the opening value previously set or less, and back pressure increases much enough to overcame the energizing force of the spring in a bypass flow control valve 50, the bypass flow control valve openes.</p> |
