| 主权项 |
1. A charge mechanism for a combustion engine comprising:
a housing including a piston bore, a charger piston, reciprocably mounted in the piston bore, for movement between a bottom-end and top-end position, the piston having an air end and a hydraulic end, the air end having an outer face with an air chamber exposed to pressurized exhaust gas for driving the piston from top-end to bottom-end during the expansion stroke, and two opposing inner faces defining a first and second inner air chamber, the first inner air chamber for charging fresh air into the combustion chamber, and the second inner air chamber, a fluid control system including a first and second fluid circuit, the first circuit for providing fresh air to the combustion chamber and the second circuit for providing a gas other than fresh air to the combustion chamber, the first circuit including two no return valves, and first and second fluid conduits, the first conduit and no return valve for providing fluid communication between air inlet and first air chamber, and the second conduit and no return valve for providing communication between first chamber and combustion chamber, the second circuit including two no return valves, and third and fourth fluid conduits, the third fluid conduit and no return valve for providing fluid communication between the source of gas other than fresh air and the second chamber and the fourth conduit and no return valve for providing fluid communication between the second chambers and combustion chamber. |
