US 9,328,654 B2 · Internal combustion engine

Abstract

The invention relates to engine construction, in particular to systems for regulating internal combustion engines. The invention makes it possible to reduce the toxicity of exhaust gases. A four-stroke reciprocating internal combustion engine is equipped with a vacuum valve. During the discharging of the exhaust gases, a vacuum pump pumps combustion products out of the cylinder via the vacuum valve. First of all, a discharge valve is opened, and the vacuum valve is opened later, after complete (or partial) closing of the discharge valve, and the vacuum valve is closed later on or at the same time as an inlet valve opens. The vacuum valve is situated in the exhaust pipe, and an additional shut-off valve is mounted downstream of said vacuum valve, along the path of the exhaust gases, the shut-off valve connecting the exhaust pipe to the exhaust manifold or disconnecting the exhaust pipe therefrom.

Claims10

Dependent claims

A four-stroke piston internal combustion engine, with or without a gas distribution phase modification system (GDPMS), comprising:

at least one cylinder, each cylinder containing an inlet valve, a vacuum valve, and an exhaust valve, which links a hollow portion of the cylinder with an exhaust pipe, in its turn, with an exhaust collector, containing a vacuum pump to remove any combustion products from the cylinder via an open vacuum valve;
wherein the exhaust valve opens first during an exhaust gas removal stroke, while the vacuum valve opens later, after the exhaust valve has been fully or partly shut, while the vacuum valve closes either simultaneously with, or at a later time than, the inlet valve opens.

Dependencies are inferred from the claim text.

Internal combustion engine

Life of this patent

Internal combustion engine

Life of this patent

Abstract

Claims10