Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1978-06-30
1980-03-11
Lazarus, Ronald H.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123133, 123122E, F02M 3100
Patent
active
041922662
ABSTRACT:
A cooling system for an internal combustion engine is provided with a primary heat exchanger and a secondary or auxiliary heat exchanger. A liquid coolant is used in the engine block, and circulation is achieved using a conventional water pump. However, no fan is required to draw air through a radiator core. Instead, air is conducted through tubing within a reservoir for the liquid coolant, this structure comprising the first heat exchanger. The air for the first heat exchanger is supplied from atmosphere and circulates through the tubing within the reservoir and is then conducted to the intake manifold of the internal combustion engine. The suction caused by the intake manifold vacuum causes air to constantly flow through the tubing in the water reservoir. This has the advantage of not only cooling the water but preheating the air that is supplied to the intake manifold. Moreover, because a fan is not required to draw air through a radiator core, it is possible to locate the first heat exchanger remotely from the internal combustion engine, thereby affording a flexibility in the design of a vehicle which uses the internal combustion engine as its motive power source. The secondary or auxiliary heat exchanger is a flat plate heat exchanger attached to the bottom of the fuel tank which supplies fuel to the internal combustion engine. This heat exchanger is connected in parallel with the primary heat exchanger so that liquid coolant from the engine also circulates in this heat exchanger. The fuel in the fuel tank which has a low vapor pressure serves to cool the liquid coolant by heat transfer from the secondary heat exchanger. The fuel which is vaporized as a result of this heat exchange may be supplied directly to the intake manifold of the engine. In addition to the heat exchange provided by the fuel, several tubes parallel to the direction of airflow pass entirely through the secondary heat exchanger. Air passes through these tubes due to the motion of a vehicle for which the internal combustion engine is the motive power source. Airflow through the tubes may be improved by adding air scoops to the inlet ends. In addition, one or more or all of the tubes can be blocked with caps depending on the ambient temperature.
REFERENCES:
patent: 1107967 (1914-08-01), Knaak
patent: 1261734 (1918-04-01), Gifford
patent: 1443859 (1923-01-01), Allen
patent: 2390979 (1945-12-01), Young
patent: 2748758 (1956-06-01), Fairbanks
patent: 3699938 (1972-10-01), Frazier
patent: 3738334 (1973-06-01), Farr
patent: 4068628 (1978-01-01), Duckworth
Lazarus Ronald H.
Whitham C. Lamont
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