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| Motor vehicle, especially a truck, with a cooling system for an internal combustion engine |
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Cooling system of an internal combustion engine incorporating a by-pass flow control system
| Details |
Inventors: Hattori, Kyo;
Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (JA)
Primary Examiner: Myhre; Charles J.
Assistant Examiner: O'Connor; Daniel J.
Attorney, Agent or Firm: Stewart and Kolasch, Ltd.
A cooling system of an internal combustion engine including a by-pass circuit which leads a flow of cooling water to by-pass a radiator, said cooling system incorporating a thermostat valve operated by a wax cylinder, wherein a second valve port is provided at a housing of the thermostat valve, said second valve port being formed as a cylindrical bore adapted to receive said wax cylinder when it has been biased in a direction to open the thermostat valve, said by-pass circuit being led through said second valve port. |
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DETAILED DESCRIPTION I claim: 1.
A cooling system of an internal combustion engine comprising a main cooling water flow circuit which connects a water jacket of the engine with a radiator, a by-pass circuit which allows for a flow of cooling water to by-pass said radiator, and a thermostat valve incorporated in said main cooling water flow circuit and adapted to open or close so as to uninterrupt or interrupt said main cooling water flow circuit in response to high or low temperature of the cooling water, said thermostat valve having a wax cylinder and a valve member which is driven by said wax cylinder when said cylinder is biased due to melting or solidifying of wax contained in said cylinder, characterized by a second valve port formed as a cylindrical bore means adapted to receive said wax cylinder when said cylinder has been biased in a direction to open said thermostat valve, said by-pass circuit being led through said second valve port.
2.
A cooling system according to claim 1, wherein said wax cylinder is guided so as to move along its axis when it is biased, said axis substantially coinciding with an axis of said cylindrical bore.
3.
A cooling system according to claim 1, wherein said wax cylinder, when it has been biased, is inserted into said cylindrical bore so much that the passage area through said second valve port is principally determined by the balance of the cross sectional areas of said cylindrical bore and said wax cylinder.
Description:
BACKGROUND OF THE INVENTION 1.
Field of the Invention: This invention relates to a cooling system of an internal combustion engine and, more particularly, an improvement in the control of said control system.
2.
Description of the Prior Art: In most conventional cooling systems of internal combustion engines, there is incorporated a by-pass circuit which allows for a circulating flow of a part of cooling water to by-pass a radiator in order to improve the warming-up performance of the engine.
Furthermore, it is also practiced to lead the by-pass circuit through an intake manifold to heat up the intake manifold more rapidly during the warming up period of the engine so that the ignition of fuel air mixture is improved
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Heat Accumulators 
