Thermostatic valve for a cooling system of an internal combustion engine
First Claim
1. A thermostatic valve (30) for a cooling system of an internal combustion engine, having an inlet connection (32) for communication with a coolant return line (20) from an internal combustion engine (12);
- a first outlet connection (34a) for communication with a coolant radiator line (22) leading to a radiator (24);
a second outlet connection (34b) for communication with a coolant bypass line (28) leading to the internal combustion engine;
a first valve element (48;
56, 57) for closing and opening a first passage between the inlet connection and the first outlet connection; and
a second valve element (49;
56, 58) for closing and opening a second passage between the inlet connection and the second outlet connection, and at least two wax cartridge thermostats (46, 47;
64, 66) for activating the valve elements (48, 49;
56, 57, 58), at least one of the wax cartridge thermostat (46, 47;
64, 66) being connected to an electric heating element (54, 55) in order to influence the temperature acting on the respective wax cartridge thermostat, and the thermostatic valve (30) also including a coolant bypass passage (56) between the inlet connection (32) and the second outlet connection (34b) leading to the coolant bypass line (28).
2 Assignments
0 Petitions
Accused Products
Abstract
In a thermostatic valve for a cooling system of an internal combustion engine with an inlet connection, a first outlet connection and a second outlet connection, and first, second and third valve elements for closing and opening the inlet and first and second outlet connections, at least two wax cartridge thermostats are provided for operating the valve elements and at least one of the wax cartridge thermostats is connected to an electric heating element for influencing the operation of the respective wax thermostat.
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Citations
15 Claims
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1. A thermostatic valve (30) for a cooling system of an internal combustion engine, having
an inlet connection (32) for communication with a coolant return line (20) from an internal combustion engine (12); -
a first outlet connection (34a) for communication with a coolant radiator line (22) leading to a radiator (24);
a second outlet connection (34b) for communication with a coolant bypass line (28) leading to the internal combustion engine;
a first valve element (48;
56, 57) for closing and opening a first passage between the inlet connection and the first outlet connection; and
a second valve element (49;
56, 58) for closing and opening a second passage between the inlet connection and the second outlet connection, and at least two wax cartridge thermostats (46, 47;
64, 66) for activating the valve elements (48, 49;
56, 57, 58), at least one of the wax cartridge thermostat (46, 47;
64, 66) being connected to an electric heating element (54, 55) in order to influence the temperature acting on the respective wax cartridge thermostat, and the thermostatic valve (30) also including a coolant bypass passage (56) between the inlet connection (32) and the second outlet connection (34b) leading to the coolant bypass line (28). - View Dependent Claims (2, 3, 4, 5, 6, 7, 15)
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8. A thermostatic valve for a cooling system of an internal combustion engine, having
an inlet connection (32) for communication with a coolant return line (20) from an internal combustion engine (12); -
a first outlet connection (34a) for communication with a coolant radiator line (22) leading to a radiator (24);
a second outlet connection (34b) for communication with a coolant bypass line (28) leading to the internal combustion engine;
a first valve element (48;
56, 57) for closing and opening a first passage between the inlet connection and the first outlet connection; and
a second valve element (49;
56, 58) for closing and opening a second passage between the inlet connection and the second outlet connection, wherein at least one wax cartridge thermostat (46, 47;
64, 66) is provided for activating the valve elements (48, 49;
56, 57, 58), and wherein a wax cartridge thermostat (46, 47;
64, 66) is connected to an electric heating element (54, 55) in order to influence the temperature acting on a wax cartridge thermostat, the first valve element (48) being composed of a first valve disk for opening and closing the first passage, and the second valve element (49) being composed of a second valve disk (49a) and a third valve disk (49b) for closing and opening the second passage alternatively, at least one wax cartridge thermostat (46) being arranged between the first valve disk and the second valve disk (48, 49a), so that the second passage is opened by the pressure of the coolant, and the thermostatic valve (30) being also provided with a coolant bypass passage (56) between the inlet connection (32) and the second outlet connection (34b) leading to the coolant bypass line (28). - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification