US 6,575,138 B2
DIRECTLY ACTUATED INJECTION VALVEGeneral
US 6,575,138 B2
DIRECTLY ACTUATED INJECTION VALVE
Tech Center:
3700 Mechanical Engineering, Manufacturing and Medical Devices/Processes
Examiner:
Mahmoud Gimie
Art Unit:
3747 Thermal and Combustion Technology, Motive and Fluid Power Systems
Inventors:
Alan B. Welch; Irawan Rahardja; Mike Hebbes
Assignee:
Priority:
05/23/01
Filed:
05/23/01
Granted:
06/10/03
Expiration:
01/30/20
Abstract
A directly actuated injection valve comprises a hollow valve housing, a valve member disposed within the hollow interior, a biasing mechanism, an actuator assembly and a passive hydraulic link assembly. The valve member is movable between a closed position and an open position for governing the flow of fuel into the combustion chamber of an internal combustion engine. The biasing mechanism, preferably a spring, biases the valve member in the closed position. The actuator assembly generates an opening force that acts against the valve spring to open the valve. The hydraulic link assembly is interposed between the valve member and the valve spring and the actuator assembly. The hydraulic link assembly transmits respective closing and opening forces to the valve member. The hydraulic link preferably comprises a piston disposed within a cylinder that is filled with a hydraulic fluid.
Cooperative Patent Classification (CPC)
F02F02D2041/2037F02M2200/507F02B2275/14F02DY02T10/12Y02T