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Thermostat and control method thereof
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A control method and thermostat technology, applied in the control of coolant flow, machine/engine, engine components, etc., can solve the problem of push rod topping, thermostat push rod lift cannot be monitored, and thermostat stuck Or the problem of lax failure, etc.
Active Publication Date: 2018-11-06
WEICHAI POWER CO LTD
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Abstract
Description
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Problems solved by technology
[0006] The purpose of the present invention is to provide a thermostat and its control method to solve the problem that the lift of the push rod of the thermostat in the prior art cannot be monitored, so that it is impossible to judge whether the medium flows through the large or small circulation according to the lift of the push rod. The amount of flow, whether the push rod has the risk of capping, whether the thermostat is stuck or not closed tightly, and whether the thermostat has reached the end of its service life
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Embodiment 1
[0044] like figure 1As shown, this embodiment provides a thermostat, which includes an upper bracket 101, a lower bracket 102, a main valve 103, a main spring 104, a push rod 105, a plug 106, an inner tank 107, and a temperature-sensitive medium 108 , reverse push rod 109, auxiliary valve 110, cover body 112, base and detection device 20. The upper bracket 101 and the lower bracket 102 are detachably connected, and a cavity is formed between the upper bracket 101 and the lower bracket 102 . The main valve 103 is located in the cavity and selectively abuts against the upper bracket 101 , when the main valve 103 abuts against the upper bracket 101 , the main valve 103 and the upper bracket 101 are sealed. The two ends of the main spring 104 abut on the lower bracket 102 and the main valve 103 respectively, the main spring 104 is in a compressed state, and apply a force to the main valve 103 through the upper bracket 101 to make it abut against the upper bracket 101. The push r...
Embodiment 2
[0051] like figure 2 As shown, this embodiment provides a method for controlling the thermostat in Embodiment 1. The engine ECU obtains the real-time lift h1 of the push rod 105, and obtains When the push rod 105 is at the real-time lift h1, the flow rates of the media in the large circulation and the small circulation are respectively entered.
[0052] Specifically, the following steps are included:
[0053] S1: The push rod 105 of the thermostat starts to lift from the initial position zero.
[0054] S2: The detection device detects the real-time lift h1 of the push rod 105, and sends the detected real-time lift h1 to the engine ECU.
[0055] S3: The engine ECU obtains the flow rates of the media entering the large circulation and the small circulation respectively when the pushrod 105 is at the real-time lift h1 according to the lift and flow distribution chart of the pushrod 105 stored therein in advance.
[0056] In step S1, the engine ECU can obtain the initial openi...
Embodiment 3
[0060] like image 3 As shown, the present embodiment provides a thermostat control method in Embodiment 1, including: the engine ECU obtains the real-time lift h1 of the push rod 105, and distributes it according to the lift and flow of the push rod 105 stored in advance From the chart, the flow rates of the medium entering the large circulation and the small circulation respectively are obtained when the push rod 105 is at the real-time lift h1.
[0061] S10: The push rod 105 of the thermostat is lifted from the initial position zero.
[0062] This step is the same as step S1 in the second embodiment, and will not be repeated here.
[0063] S20: The detection device detects the real-time lift h1 of the push rod 105, and sends the detected real-time lift h1 to the engine ECU.
[0064] This step is the same as step S2 in the second embodiment, and will not be repeated here.
[0065] S30: The engine ECU acquires the theoretical lift h2 of the push rod 105 .
[0066] S40: Th...
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Abstract
The invention relates to the technical field of thermostats and particularly discloses a thermostat and a control method thereof. The thermostat comprises an upper support, a lower support, a main valve, a main spring, a push rod, a temperature sensing medium, a reverse push rod and a detecting device. The lower support is matched with the upper support, and a cavity is formed between the lower support and the upper support. The main valve is located in the cavity and selectively connected with the upper support in an abutting mode, and when the main valve is connected with the upper support in the abutting mode, the main valve and the upper support are sealed. The two ends of the main spring are connected with the main valve and the lower support in an abutting mode correspondingly and are in a compressed state. The push rod is arranged on the main valve in a sleeving mode, the push rod and the main valve are fixedly connected and sealed, and a first containing cavity is formed in themain valve. The temperature sensing medium is packed in the first containing cavity and can be expended after being heated. The reverse push rod is arranged on the push rod in a penetrating mode, oneend of the reverse push rod is located in the temperature sensing medium, and the other end of the reverse push rod is connected with the upper support. The reverse push rod and the push rod are slidably connected and sealed. The detecting device is connected with an engine ECU and used for detecting the position of the push rod. The lift of the push rod is detected through the detecting device,and whether the thermostat is in failure or not can be judged accordingly.
Description
technical field [0001] The invention relates to the field of thermostats, in particular to a thermostat and a control method thereof. Background technique [0002] The thermostat is essentially a temperature control switch, which pushes the valve to open or close through the expansion or compression deformation of the built-in temperature-sensing medium heated or cooled by the coolant. In this way, the internal combustion enginecoolant is distributed large and small. The circulating flow ensures that the engine runs in the best working condition and is an important part of the car engine. [0003] Existing thermostats mainly include ordinary wax-type thermostats and electronically controlled thermostats. Ordinary wax-type thermostats work passively, and the built-in paraffin wax is directly affected by the temperature of the medium flowing through the thermostat to cause thermal expansion and contraction. To drive the push rod to control the opening and closing of the ther...
Claims
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Application Information
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