Valve mechanism of internal combustion engine

Patent · Mon Feb 23 23:00:00 EST 1987

OSTI ID:6740601

Morita, S; Sato, K; Asaoka, Y; Harada, I; Hirano, T

This patent describes a valve mechanism of an internal combustion engine, the valve mechanism comprising: a hydraulic valve lifter assembled in a recess of a rocker arm pivotably connected to a rocker shaft, the shaft extending through a hole in the rocker arm. The hydraulic valve lifter has a lifter body slidably inserted in the recess, a plunger slidably inserted in the lifter body, an oil chamber formed between the recess and the plunger, an oil pressure chamber communicating with the oil chamber through a passage and formed between the lifter body and the plunger. A check valve located in the passage for providing selective communication between the oil chamber and the oil pressure chamber; an oil supply path formed in the rocker arm and extending from an oil path formed in the rocker shaft to the oil chamber; and a return path formed in the rocker arm and communicating with the oil path in the rocker shaft. The return path extends from the top of the oil chamber to a clearance between an inside of the hole of the rocker arm and an outside of the rocker shaft, the return path providing constant communication between the oil chamber and the clearance.

• Assignee: Toyota Jidosha Kabushiki Kaisha, Aichiken
• Patent Number(s): US 4644914
• OSTI ID: 6740601
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
HEAT ENGINES
HYDRAULIC CONTROL DEVICES
INTERNAL COMBUSTION ENGINES
LUBRICANTS
LUBRICATING OILS
MACHINE PARTS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
SHAFTS
VALVES