US 6,615,798 B2Granted

Internal combustion engine having multiple intake valves, one valve adapted for higher speed

OwnerKevin R. Ortoninventor

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Abstract

An internal combustion engine 10 comprises a cylinder 12 including a combustion chamber 17 having at least two air input ports 31, 51 and a piston 18 movable in cylinder 12 so as to vary the volume of combustion chamber 17. An air supply system 20 for supplying combustion air to cylinder 12 comprises first and second air intake systems 30, 50, each including an air passage 33, 53 and a valve 40, 60 controlling air passage through their respective port 31, 51. Each valve is controlled such that second valve 60 is open longer than first valve 40. An air flow valve controller 72 responsive to engine speed and air pressure downstream of a throttle valve 24 moves a valve 81 in second passageway 53 to permit greater air flow through second air passage 53 at higher engine speed and at air pressure less than steady state air pressure for the engine speed.

Claims19

Dependent claims

An internal combustion engine comprising:

a cylinder including:
a combustion chamber;
a piston movable in said cylinder so as to vary the volume of said combustion chamber;
an exhaust system for removing combustion gases from said cylinder including:
an exhaust port in said cylinder;
and
an air supply system for supplying combustion air to said cylinder comprising:
a first air intake system for supplying air to said cylinder comprising:
a first air intake port in said cylinder;
a first air passage including:
a first end positioned for receiving air;
and
a second end in communication with said first intake port;
a first valve controlling passage of air through said first air intake port;
and
first valve control means for opening and closing said first valve;
a second air intake system for supplying air to said cylinder comprising:
a second air intake port in said cylinder;
a second air passage including:
a first end for receiving air;
and
a second end in communication with said second air intake port;
a second valve controlling passage of air through said second air intake port;
second valve control means for opening and closing said second valve such that said second valve is open longer than said first valve;
and
an air flow regulator for regulating air flow through said second air passage comprising:
air flow valve means for regulating air flow through said second air passage to said second valve;
and
an air flow valve controller connected to said air flow valve means and, responsive to engine speed, moving said air flow valve means so as to regulate air flow through said second air passage so as to permit greater air flow through said second air passage at higher engine speed and lesser air flow though said second air passage at lower engine speed.

26 more elements

An internal combustion engine comprising:

a cylinder including:
a combustion chamber;
a piston movable in said cylinder so as to vary the volume of said combustion chamber;
an exhaust system for removing combustion gases from said cylinder including:
an exhaust port in said cylinder;
and
an air supply system for supplying combustion air to said cylinder comprising:
a first air intake system for supplying air to said cylinder comprising:
a first air intake port in said cylinder;
a first air passage including:
a first end positioned for receiving air;
and
a second end in communication with said first intake port;
a first valve controlling passage of air through said first air intake port;
and
first valve control means for opening and closing said first valve;
a second air intake system for supplying air to said cylinder comprising:
a second air intake port in said cylinder;
a second air passage including:
a first end for receiving air;
and
a second end in communication with said second air intake port;
a second valve controlling passage of air through said second air intake port;
second valve control means for opening and closing said second valve such that said second valve is open longer than said first valve;
and
an air flow regulator for regulating air flow through said second air passage comprising:
air flow valve means for regulating air flow through said second air passage to said second valve;
and
an air flow valve controller connected to said air flow valve means and, responsive to air pressure in a said air passage and not downstream of said air flow valve, moving said air flow valve means so as to permit greater air flow through said second air passage at lower pressure and lesser air flow though said second air passage at higher pressure.

26 more elements

An internal combustion engine comprising:

a cylinder including:
a combustion chamber;
a piston movable in said cylinder so as to vary the volume of said combustion chamber;
an exhaust system for removing combustion gases from said cylinder including:
an exhaust port in said cylinder;
and
an air supply system for supplying combustion air to said cylinder comprising:
a first air intake system for supplying air to said cylinder comprising:
a first air intake port in said cylinder;
a first air passage including:
a first end positioned for receiving air;
and
a second end in communication with said first intake port;
a first valve controlling passage of air through said first air intake port;
and
first valve control means for opening and closing said first valve;
a second air intake system for supplying air to said cylinder comprising:
a second air intake port in said cylinder;
a second air passage including:
a first end for receiving air;
and
a second end in communication with said second air intake port;
a second valve controlling passage of air through said second air intake port;
second valve control means for opening and closing said second valve such that said second valve is open longer than said first valve;
and
an air flow regulator for regulating air flow through said second air passage comprising:
air flow valve means for regulating air flow through said second air passage to said second valve;
and
an air flow valve controller connected to said air flow valve means and, responsive to air pressure in a said air passage not downstream of said air flow valve and to engine speed, moving said air flow valve so as to permit greater air flow through said second air passage at higher engine speed and lesser air flow though said second air passage at lower engine speed and moving said air flow valve means so as to permit relative greater air flow through said second air passage at air pressure less than steady state air pressure for the engine speed and relative less air flow though said second air passage at air pressure higher than steady state air pressure for the engine speed.

26 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/100,572Filed 15 Mar 2002 · us provisional application
Priority: 3 Apr 2001
Published: US 2002/0139349 A13 Oct 2002
Granted: 9 Sep 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

F01L 1/26
Valve-gear or valve arrangements, e.g. lift-valve gear: characterised by the provision of two or more valves operated simultaneously by same…
F01L 1/265
Characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with…
F01L 1/34
Valve-gear or valve arrangements, e.g. lift-valve gear: characterised by the provision of means for changing the timing of the valves without…
F01L 13/0005
Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations: deactivating valves