Internal-combustion engines – Cooling – Parallel flow
Patent
1980-10-16
1982-09-14
Cuchlinski, Jr., William A.
Internal-combustion engines
Cooling
Parallel flow
123 4142, 123 4144, 123563, 60599, F01P 714, F02B 2904
Patent
active
043489915
ABSTRACT:
1 A dual loop cooling system for an internal combustion engine including a first loop or circuit (36) employing engine lubrication oil for cooling the engine cylinder and a second loop or circuit (48) employing water for cooling the aftercooler and engine head. A first flow control valve (72) and heat exchanger (54) operate to maintain an ideal temperature for the lubrication oil in the range of 200.degree.-250.degree. F. A radiator (86) and second flow control valve (94) in the second circuit (48) operate in response to engine output torque to cause the intake air to be at its lowest temperature at maximum engine output torque and to be at its highest temperature at minimum engine output torque. In one embodiment, the control valve (94) responds to engine water outlet temperature as determined by sensor (104). In another embodiment, a control valve (94') responds to intake manifold air pressure as determined by sensor (106). In yet another embodiment, valve (94") responds to compressor discharge air temperature as determined by sensor (108) to produce the desired transient response.
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Reichenbach Dean H.
Ruthmansdorfer David A.
Stang John H.
Cuchlinski Jr. William A.
Cummins Engine Company, Inc.
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