Patent ID: 8186335
Filing Date: 2012-05-29
Classification: F02M

Abstract:
1. A load control mechanism for an internal combustion engine comprising: an intake passage for introducing air into a combustion chamber via an intake port; a throttle valve disposed in the intake passage for adjusting an intake air amount in accordance with an opening degree; an intake valve for allowing/blocking communication between the combustion chamber and the intake port; an exhaust passage for guiding an exhaust gas discharged from the combustion chamber via an exhaust port; and an exhaust valve for allowing/blocking communication between the combustion chamber and the exhaust port; wherein a passage for returning the exhaust gas from the exhaust port to the combustion chamber is disposed in the internal combustion engine; and exhaust gas return amount adjustment means is disposed in the passage for adjusting an amount of the exhaust gas returned to the combustion chamber via the passage to an amount which allows a pressure inside the combustion chamber to become substantially an atmospheric pressure, wherein the exhaust gas return amount adjustment means is formed of a one-way valve, and the exhaust gas return amount adjustment means is configured to open only when the pressure within the combustion chamber becomes a negative pressure.