Compression release retarder with valve motion modifier

Patent · Tue Nov 17 04:00:00 EST 1987

OSTI ID:5850585

Meistrick, Z S; Quenneville, R N

This patent describes an engine retarding system of a gas compression release type including an internal combustion engine having a pressurized lubricating oil system, intake valve means, exhaust valve means, and pushtube means associated with each of the intake valve means and exhaust valve means, hydraulically actuated slave piston means associated with the exhaust valve means to open the exhaust valve means at a predetermined time, control valve means and solenoid valve means communicating in series with the pressurized lubricating oil system and the hydraulically actuated slave piston means. The improvement comprises plenum means communicating with the slave piston means, first check valve means located between the slave piston means and the plenum, driving cylinder means communicating with the plenum, free piston means having first and second ends mounted for reciprocating motion in the driving cylinder means, spring means biasing the free piston means outwardly from the plenum. The free piston means communicate on the first end with the plenum means and first master cylinder means align with the exhaust valve pushtube means and communicate with the second end of the free piston means. First master piston means are mounted for reciprocatory motion in the first master cylinder means and adapted to be driven by the exhaust valve pushtube means, trigger check valve means aligned with the first master piston means and communicating between the slave piston means and the second side of the free piston means to permit flow of hydraulic fluid from the slave piston means toward the free piston means.

• Assignee: Jacobs Manufacturing Co., Bloomfield, CT
• Patent Number(s): US 4706624
• OSTI ID: 5850585
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMPRESSION
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
FLUID MECHANICS
HEAT ENGINES
HYDRAULICS
INTERNAL COMBUSTION ENGINES
LUBRICANTS
LUBRICATING OILS
MECHANICS
OILS
OPERATION
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PISTONS
PRESSURIZING
VALVES