Fluid-regulating thermostat and method of manufacturing such a thermostat
一种节温器、流体的技术，应用在温度控制、控制/调节系统、冷却剂流量的控制等方向，能够解决没有公开单件式体部与节温器组装、单件式方案不、节温器出现故障等问题
Active Publication Date: 2013-01-30
VERNET SA
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However, while US-A-3792 813 explains when the body consists of two parts, in particular by utilizing the two-part structure of the body, the temperature control element and the Its spring is assembled into a part of the body to assemble the thermostat, but the document does not disclose how to assemble the one-piece body with the rest of the thermostat
Therefore, the one-piece solution proposed in US-A-3 792 813 cannot be used in practice, and it is also observed that the arms of the thermostat body are inclined at 45° relative to the working axis of the thermostat element and its spring, so that in operation , under the force generated by the thermostat element and its return spring, those arms run the risk of opening each other, causing the thermostat to malfunction
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[0022] 1 and 2 show a thermostat 1 for regulating the flow of a cooling fluid, for example, flowing in a cooling circuit of an internal combustion engine. In operation, the thermostat is designed to be placed in the connection area between the outlet pipe 2 from the heat exchanger forming part of the cooling circuit and the hose 3 used to deliver the liquid to the circuit downstream position. As an example, the outlet pipe 2 is made of metal and constitutes the outlet of a heat exchanger associated with an exhaust gas recirculation (EGR) system. An EGR system is an anti-pollution device that injects a portion of the exhaust gas into the engine's intake pipe to reduce peak combustion temperatures and thereby reduce the formation of pollutants such as nitrogen oxides. As shown by arrow 4, the coolant leaving the heat exchanger of the EGR system enters the inlet of thermostat 1, and this thermostat 1 controls whether to turn to the soft temperature as shown by arrow 5 according ...
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This thermostat (1) comprises a body (10) which comprises a one-piece metal part (11) including simultaneously, in succession along the axis (X-X) of a thermostatic element (20) of the thermostat, a transverse tab (12) against which the piston (22) of this element can bear, a tubular part (13) centred on this axis and defining a shut-off seat (13A), and two support arms (14) supporting a return spring (40) for returning this element, which arms extend lengthwise more or less in the axial direction of the element and each delimits, at their opposite end (14A) to the tubular part, a surface (14A1) for contact with the spring against which surface the compressed spring is pressed. To make it easier to manufacture this body and to assemble it with the other components of the thermostat, each arm is, at its end (14) facing towards the tubular part, connected to the rest of the one-piece metal part in a way that can be deformed between a service position in which the contact surface is plumb with one end of the spring, and an assembly position in which this surface is away from the axis.
Description
technical field [0001] The invention relates to a fluid regulating thermostat / thermostat, in particular for a coolant of an internal combustion engine, and to a method for producing such a thermostat. [0002] The present invention more particularly relates to a thermostat including a thermostat / thermostatic element and a body, the thermostat responsive to the temperature of the fluid to be regulated, controlling the closure of the flow of fluid through the thermostat, and communicating with The return spring is connected, and the temperature control element and the spring are arranged in the body. The body of the thermostat must satisfy competing constraints: first, the structure of the body must be rigid enough to absorb the pressure of the fluid being regulated, as well as the mechanical forces associated with the operation of the thermostat element and its return spring; second , the structure of the body must be sufficiently open to define one or more paths that allow fl...
Claims
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IPC IPC(8): G05D23/02F01P7/16
CPCG05D23/022Y10T29/49863
Inventor N·鲍狄埃
Owner VERNET SA