Patent ID: 6325043
Filing Date: 2001-12-04
Classification: F01L,F02D,F02M

Abstract:
An exhaust gas recirculation apparatus characterized in that it is provided with an exhaust gas recirculation master piston activated byan intake rocker arm that acts to open an intake valve on a cylinder on the intake stroke;a slave piston connected via a first oil passage to said exhaust gas recirculation master piston, and further, that acts to open the aforementioned intake valve and an exhaust valve provided on the same cylinder when pressure is generated in said first oil passage by the action of the aforementioned exhaust gas recirculation master piston;a hydraulic oil supply means that switches between maintaining and releasing oil pressure in the aforementioned first oil passage;a compression pressure-release engine brake master piston activated by an exhaust rocker arm that acts to open an exhaust valve on the cylinder on the exhaust stroke;a slave piston connected via a second oil passage to said compression pressure-release engine brake master piston, and further, when pressure has been generated in said second oil passage by the action of the aforementioned compression pressure-release engine brake master piston, that acts to open an exhaust valve provided separately from the aforementioned exhaust valve on a cylinder approaching compression top dead center; and,a hydraulic oil supply means that switches between maintaining and releasing oil pressure in the aforementioned second oil passage.