具体实施方式

下面结合附图和实施例，对本实用新型的具体实施方式作进一步详细描述。以下实施例用于说明本实用新型，但不用来限制本实用新型的范围。

本实用新型公开了一种应用于自动变速箱的升温降温系统，如图1所示，包括温控换向阀3、变速箱冷却器、热交换器及其管道，温控换向阀3有一个进口和两个出口，热交换器有分别对应连通的两组进口和出口，温控换向阀3的进口连接变速箱2，温控换向阀3的出口一连接变速箱冷却器的进口，温控换向阀3的出口二连接热交换器的进口二，热交换器的出口二连接变速箱2，热交换器的进口二也与变速箱冷却器的出口相连，热交换器的进口一和出口一均与发动机1相连。温控换向阀3控制变速箱散热液有两种流向：

变速箱散热液温低于设定温度一时，所述温控换向阀3的进口与出口二连通，变速箱散热液的流经顺序为：变速箱2、温控换向阀3、热交换器、变速箱2，同时，发动机冷却液的流经顺序为：发动机1、热交换器、发动机1；所述设定温度一为70-78℃。

变速箱散热液温高于设定温度二时，所述温控换向阀3的进口与出口一连通，变速箱散热液的流经顺序为：变速箱2、温控换向阀3、变速箱冷却器、热交换器、变速箱2，同时，发动机冷却液的流经顺序为：发动机1、热交换器、发动机1；所述设定温度二为80℃-90℃。

以具体的实施例进一步说明，发动机1采用冷却水水冷，变速箱2采用散热油油冷，因此，热交换器为油-水热交换器5，油-水热交换器5的对应连通的两组进口和出口分别为变速箱油进、出口，发动机冷却水进、出口，发动机冷却水与变速箱散热油在此零件中进行热量交换，达到出水温度与出油温度基本相同的效果；

变速箱冷却器采用风冷式冷却器，即油风冷器4，安装在发动机舱的前方。通过车辆行驶产生的风速使高温变速箱油与空气进行热交换，车速越高，油风冷器4的冷却效果越好，油风冷器4的散热功率可因不同车型的散热需求试验确定，通常变速箱油流经油风冷器4后温度为50℃左右；

变速箱油温低于设定温度一时，所述温控换向阀3关闭，其进口与出口二连通；变速箱油温高于设定温度二时，所述温控换向阀3打开，其进口与出口一连通；所述设定温度一通常为77℃，设定温度二通常为83.5℃。

本系统的具体运行方式为：

变速箱散热油温低于设定温度一77℃时，所述系统进入升温模式：所述温控换向阀3的进口与出口二连通，变速箱散热油流经顺序为：变速箱2、温控换向阀3、油-水热交换器5、变速箱2，同时，发动机冷却水流经顺序为：发动机1、油-水热交换器5、发动机1，发动机冷却水协助变速箱散热油升温；

变速箱散热油温高于设定温度二83.5℃时，所述系统进入降温模式：所述温控换向阀3的进口与出口一连通，变速箱散热油的流经顺序为：变速箱2、温控换向阀3、油风冷器4、油-水热交换器5、变速箱2，同时，发动机冷却水的流经顺序为：发动机1、油-水热交换器5、发动机1，降温模式中包括两种状态：

若变速箱油温高于发动机水温时，即变速箱2处在发热严重工况，此时发动机冷却水可为变速箱油进行散热；若发动机水温高于变速箱油温时，即发动机1处在发热严重的工况，此时变速箱散热油可为发动机冷却水降温；即发动机1、变速箱2互为对方降温。

若变速箱散热油温介于设定温度一与设定温度二之间，则保留系统原模式直到油温达到另一模式的临界温度，当变速箱散热油温为70℃时，系统进入步骤S2升温模式，油温升至设定温度一77℃后保留升温模式，继续升温直到油温高于设定温度二83.5℃，进入步骤S3降温模式；而随着变速箱的持续工作，变速箱散热油温为95℃，系统进入步骤S3降温模式，油温降至设定温度二83.5℃后保留降温模式，继续降温直到油温低于设定温度一77℃，进入步骤S2升温模式。

结合车辆运行的工况，则车辆冷启动或在低温环境中时，变速箱油温、发动机水温均较低，温控换向阀3控制变速箱散热油不流经油风冷器4降温，直接在油-水热交换器5中与发动机冷却水进行热交换，二者共同升温，能尽快达到工作温度，有利于发动机1和变速箱2暖机。

当车辆正常行驶工况下，变速箱油温最佳工作在90℃左右，温控换向阀3控制变速箱散热油先流经油风冷器4，降温后与发动机冷却水在油-水热交换器5中进行热量交换，从而控制油温、水温在最佳工作温度；变速箱油温的理想温度在90℃左右，而发动机冷却系统都是带有主动散热风扇的，散热功率、散热效果优于变速箱的被动冷却，发动机冷却水温保持在85℃-90℃，与变速箱最佳油温重合，利用热交换器，使变速箱2借用发动机1的主动冷却系统来控制油温在理想水平。

当车辆在极热环境中或进行大功率极限工况下，变速箱油温、发动机水温均会提高，温控换向阀3控制变速箱散热油先流经油风冷器4，降温后与发动机冷却水在油-水热交换器5中进行热量交换，从而控制油温、水温不至于过高，始终低于报警温度，报警温度比理想温度高约20-50℃，不同的发动机、变速箱会有不同的设定。

综上可知，通过上述的一种应用于自动变速箱的升温降温系统，具有以下优点：

(1)本实用新型在变速箱散热油温度较高时，变速箱散热油经油风冷器降温后在油-水热交换器中与发动机冷却水进行热交换，将变速箱散热系统和发动机散热系统结合起来，互换热量，互相牵制，增大了动力总成整体的散热功率，加快了散热速度，同时也兼顾了发动机水温、变速箱油温的平衡，避免出现二者其中一个温度过高的情况，使变速器更加持久可靠；

(2)本实用新型通过温控换向阀使变速箱散热油温度较低时，不流经油风冷器，与发动机冷却水在在油-水热交换器中进行热量交换，使得变速箱升温速度更快，变速箱可靠性更佳，能量利用率更高，而升温速度更快导致油耗相对更小；

(3)本实用新型不仅解决了自动变速箱的散热，也解决了发动机在高负荷情况下散热功率不足情况下的散热，使变速箱油温、发动机水温都能保持在许用范围内，甚至是最佳温度范围；

(4)本实用新型的变速箱散热油与发动机冷却水在油-水热交换器中直接进行热量交换，相对于导热部件传递热量的方法，热量损耗更少，能量利用率更高；

(5)本实用新型的变速箱冷却器采用风冷式冷却器，并安装在发动机舱的前方，通过车辆行驶产生的风速使高温变速箱油与空气进行热交换，该方法节约能源，又合理有效。

最后应说明的是：以上实施例仅用以说明本实用新型的技术方案，而非对其限制；虽然结合附图描述了本实用新型的实施方式，但是本领域技术人员可以在不脱离本实用新型的精神和范围的情况下做出各种修改和变型，这样的修改和变型均落入由所附权利要求所限定的范围之内。

Mode of execution

Will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The inlet of the temperature control reversing valve 1 is connected with the gearbox 3, the outlet of the temperature control reversing valve 3 is connected with the gearbox 3, the inlet of the temperature control reversing valve 2 is also connected with the outlet of the gearbox cooler, and the inlet and the outlet of the heat exchanger are respectively connected with the engine 3 1 3 2. The temperature control reversing valve 3 controls the transmission fluid of the transmission to have two flow directions.

An inlet and an outlet of the temperature control reversing valve 3 are communicated with the outlet, and the flowing sequence of the transmission radiating liquid is: a gearbox 2, a temperature control reversing valve 3, a heat exchanger, a gearbox 2 and an engine 1, wherein the setting temperature is 1 70 - 78 °C.

The temperature control reversing valve 3 is communicated with the outlet, and the flowing sequence of the transmission radiating liquid is that the gearbox 2, the temperature control reversing valve 3, the gear box cooler, the heat exchanger and the gearbox 2 are sequentially connected through an engine 1, a heat exchanger, an engine 1 and a setting temperature of 80 °C - 90 °C.

, The heat exchanger is an oil-to-water heat exchanger 1, and the two sets of inlets and outlets communicated with the corresponding communication of the oil-5 water heat exchanger 5 2 are respectively a gearbox oil inlet, an outlet, an engine cooling water inlet, an outlet, an engine cooling water and a gearbox heat dissipation oil.

The gearbox cooler employs an air-cooled cooler, namely an oil cooler 4, mounted in front of the engine compartment. The higher the vehicle speed, the better the cooling effect of the oil cooler 4, the better the heat dissipation power of the oil cooler 4 can be determined by the heat dissipation demand test of different vehicle types, and the temperature of the gearbox oil flowing through the oil cooler 4 is usually 50 °C.

When the oil temperature of the gearbox is lower than the set temperature, the temperature control reversing valve 3 is closed; when the oil temperature of the gearbox is higher than the set temperature, the temperature control reversing valve 3 is opened; the inlet is communicated with the outlet; the set temperature is usually 77 °C and the set temperature is usually 83.5 °C.

A specific operation mode of the system is as follows.

When the cooling oil temperature of the gearbox is 77 °C, the inlet and the outlet of the temperature control reversing valve 3 communicate with each other, and the transmission heat dissipation oil flows through the gearbox 2, the temperature control reversing valve 3, the oil-water heat exchanger 5 and the gearbox 2 through the sequential order: the engine 1, the oil-water heat exchanger 5 and the engine 1.

When the cooling oil temperature of the gearbox is higher than two 83.5 °C, an inlet of the temperature control reversing valve 3 is communicated with an outlet, and the flowing sequence of the cooling oil of the gearbox is the following steps: a gearbox 2, a temperature control reversing valve 3, an oil cooler 4, an oil water heat exchanger 5 and a gearbox 2 5, and the engine 1 1 and the cooling mode include two states.

When the temperature of the engine is higher than the engine water temperature, the gearbox 2 is under the severe heating condition, and the engine cooling water can be cooled by the gearbox oil; the engine 1 can be cooled by the engine cooling water; that is, the engine 1 and the gearbox 2 are cooled relative to each other.

When the cooling oil temperature of the gearbox is 70 °C, the system enters the step S2 cooling mode, the oil temperature falls below the set temperature two 77 °C, the cooling mode is reserved, the cooling is continued until the oil temperature is lower than the set temperature one 83.5 °C, and the temperature rise mode of the step S3 is entered into the cooling mode of the system. The system enters the step S3 temperature lowering mode after the oil temperature falls below the set temperature two. 95 °C 77 °C. The 83.5 °C system enters the step S2 cooling mode.

When the vehicle is cold started or in a low temperature environment, the oil temperature and the engine water temperature of the gearbox are low, and the temperature control reversing valve 3 controls the gearbox cooling oil to not flow through the oil air cooler 4 to cool and directly heat up the oil water heat exchanger 5 and the engine cooling water to reach the operating temperature as soon as possible, and the engine 1 and the gearbox 2 can be warmed up.

The ideal temperature of the oil temperature of the gearbox is 90 °C, the cooling water temperature of the gearbox is controlled to be equal to 3, and the cooling water temperature of the engine is controlled to be equal to the optimal oil temperature of the gear box, and the oil temperature of the gearbox 4 is controlled by the oil-water heat exchanger 5 by the temperature control reversing valve 90 °C when the engine cooling water is cooled by the oil cooler 85 °C - 90 °C and is cooled by the engine 2 1.

The temperature control reversing valve 3 controls the oil temperature, the water temperature is not too high, the temperature is not too high, the alarm temperature is less than the alarm temperature, and the alarm temperature is higher than the ideal temperature by about 4 20 - 50 °C and 5 different engines and the gearbox have different settings.

In conclusion, the temperature rising and cooling system applied to the automatic gearbox has the advantage that the temperature rising and cooling system has the advantages of being convenient to use.

(1) The utility model discloses when the gearbox heat dissipation oil temperature is higher, heat exchange is carried out in oil-water heat exchanger and engine cooling water in the oil-water heat exchanger after the oil-water heat exchanger cools down, has increased the balance of engine water temperature, gearbox oil temperature simultaneously, avoids appearing the condition that one temperature is too high simultaneously, makes derailleur more durable reliable.

(2) The utility model discloses a temperature control reversing valve makes the gearbox heat dissipation oil temperature lower, does not flow through the oil air cooler, with the engine cooling water and carries out heat exchange in oil-water heat exchanger for the gearbox reliability is better, and energy utilization efficiency is higher, and the oil consumption is relatively littleer, and the oil consumption is relatively littleer.

(3) The utility model not only solves the heat dissipation of the automatic gearbox, but also solves the heat dissipation under the condition of insufficient heat dissipation of the engine under the condition of high load.

(4) The utility model discloses a gearbox heat dissipation oil and engine cooling water directly carry out the heat exchange in the oil-water heat exchanger, transfer the method of heat with the heat conduction part, and the heat loss is less, and energy utilization is higher.

(5) The utility model discloses a gearbox cooler adopts air-cooled type cooler to install in the front of engine compartment, make high temperature gearbox oil and air carry out heat exchange through the wind speed that the vehicle traveles, the method energy saving, reasonable effective.

Finally, it should be noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not by way of limitation; various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present invention.