Crankcase pressure regulation system for an internal combustion engine
AssigneeDresser Industries, Inc.
InventorBernard F. Enright
Life of this patent
Estimating the term…
Abstract
An improved crankcase pressure regulation system for an internal combustion engine has a floating-disk type vacuum pressure regulator operatively connected to a breather tube for blowby gases upstream of a flow restriction such as an oil separator. The breather tube has an inlet that receives crankcase blowby gases from a breather port in the crankcase and an outlet that feeds blowby gases into an air intake housing where the blowby gases are mixed with filtered engine intake air. The blowby gases are recirculated into the engine for combustion. The floating-disk type vacuum regulator has an air filter to filter ambient air that is added to the blowby gases and later recirculated into the engine air intake for combustion.
Claims16
In an internal combustion engine having a crankcase, an improved crankcase pressure regulation system comprising:
- an engine air intake;
- an air filter that filters ambient air to provide filtered intake air to the engine air intake;
- a crankcase having a breather port through which crankcase blowby gases exit;
- a breather tube having an inlet that receives the crankcase blowby gases exiting the breather port and having an outlet that feeds blowby gases into the filtered intake air flow;
- an oil separator located along the breather tube;
- and
- a vacuum pressure regulator that adds a regulated amount of ambient air to crankcase blowby gases flowing through the breather tube at a location between the crankcase breather port and the oil separator.
In an internal combustion engine having a crankcase, a method of regulating pressure in the crankcase comprising the steps of:
- creating a negative pressure in the crankcase by drawing a flow of blowby gas from the crankcase;
- and
- regulating the negative crankcase pressure by adding a regulated amount of air to the flow of the blowby gas drawn from the crankcase and restricting the flow of the blowby gas drawn from the crankcase after the ambient air has been added to the blowby gas.
In an internal combustion engine having a crankcase, an improved crankcase pressure regulation system comprising:
- an engine air intake;
- an air filter that filters ambient air to provide filtered intake air to the engine air intake;
- a crankcase having a breather port through which crankcase blowby gases exit;
- a breather tube having an inlet that receives the crankcase blowby gases exiting the breather port and having an outlet that feeds blowby gases into the filtered intake air flow;
- an oil separator located along the breather tube;
- and
- a floating-disk type vacuum pressure regulator operatively connected to the breather tube, the floating-disk type vacuum pressure regulator having an air filter that filters ambient air flowing into the vacuum pressure regulator.
Dependencies are inferred from the claim text.