Resources Contact Us Home
Exhaust gas recirculation engine for high altitude use

Image Number 2 for United States Patent #4150648.

Disclosed is an exhaust gas recirculation engine for high altitude use. The engine comprises an exhaust gas recirculation control valve device communicating an intake manifold with an exhaust manifold for circulating a part of the exhaust gas for reducing harmful NO.sub.x contaminants contained in the exhaust gas, which device is actuated by vacuum supplied from a vacuum port disposed at a position adjacent to a throttle valve of a carburetor, a reservoir tank for storing a vacuum; a control valve device for controlling the delivery of the vacuum from the reservoir tank; and an altitude compensating device for actuating the control valve device in accordance with the altitude.Utilizing the above-described engine, exhaust gas is recirculated for a predetermined interval of time after the throttle valve has been opened at a level which is more than the predetermined level during high altitudes. However, exhaust gas is stopped from being recirculated as soon as the throttle valve is opened to the predetermined level during low altitudes. As a result, the amount of harmful NO.sub.x contaminants contained in the exhaust gas can always be maintained at a low level.

  Recently Added Patents
Lighting device with device for regulating the illumination according to the luminance of the illumination field and corresponding use
Systems, methods, and media for firewall control via remote system information
Solid-state image sensing apparatus and electronic apparatus
Systems and methods for implementing multi-application tabs and tab sets
Maesa japonica extracts and methods of use
Systems, methods, and apparatus to determine physical location and routing within a field of low power beacons
Myoglobin blooming agents, films, packages and methods for packaging
  Randomly Featured Patents
Mine resistant armored vehicle
Fiber reinforced thermoplastic material
System and method for customizing a portal environment
Sorting mined material
Air conditioner
Insulated vessel
Means and method of soil water desorption
Guidewire advancement method
Method of making extruded zipper strips and bags containing the same
Negative-working radiation-sensitive compositions and imageable materials