Patent ID: 11970959
Assignee: JIANGSU JOINTEK PRECISION MACHINERY CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A valve actuator for a specialized stationary two-piston hydraulic engine, comprising:
a specialized drive cam, disposed on a side of a positive cam of the engine, with a round base component and a drive lift cam disposed on the round base component, the positive cam being used to displace a valve bridge by means of a positive rocker arm;
an actuator, provided with a primary piston slidably mounted in a primary piston hole and a secondary piston slidably mounted in a secondary piston hole;
an oil drive line, maintained in communication between the primary piston hole and the secondary piston hole; and
a control valve, the oil drive line being connected to an oil supply line through the control valve;
in a condition in which the oil supply line supplies oil to the oil drive line and the control valve is open, when the specialized drive cam is rotated to the round base component for sliding or rolling engagement with the primary piston, the primary piston extending under hydraulic pressure of the oil drive line to contact the round base component; and when the specialized drive cam is rotated to the drive lift cam for sliding or rolling engagement with the primary piston, the control valve blocking the oil drive line from the oil supply line, and a hydraulic linkage being formed between the primary piston and the secondary piston, and the drive lift cam displacing the secondary piston through the primary piston so that the secondary piston provides power for a drive valve of the engine to move relative to the valve bridge; and
in a condition in which the control valve is closed, the oil drive line being drained through the control valve, and the hydraulic linkage between the primary piston and the secondary piston being released.