Oil supply system and excavator

Abstract

The oil supply system comprises a main oil tank, an auxiliary oil tank and a heating module, a first kind of fuel oil is contained in the main oil tank, a second kind of fuel oil is contained in the auxiliary oil tank, and the heating end of the heating module is arranged in the main oil tank. The heating module heats the first type of fuel oil in the main oil tank, and the engine can work according to the second type of fuel oil or the heated first type of fuel oil. According to the oil supply system, the engine of the excavator can be firstly started through the second type of fuel oil in the auxiliary oil tank, and then the first type of fuel oil with lower cost in the main oil tank is heated through the heating module, so that the problem of wax precipitation of the first type of fuel oil in a subzero low-temperature environment is avoided; and then the first type of fuel oil is switched to serve as an oil supply source of the engine, so that the working cost of the excavator in the subzero low-temperature environment is reduced, and the working performance of the engine in the subzero low-temperature environment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to engine oil supply technical field especially, relates to an oil supply system and excavator. BACKGROUND

[0002] At present, the excavator under zero low temperature environment due to commonly used 0 number diesel low temperature wax, lead to poor mobility, make the performance of engine reduces. To solve the above zero low temperature environment brings diesel wax problem, generally need to adopt the corresponding low mark diesel, for example, -30 DEG C low temperature environment adopts -35 number diesel.

[0003] However, in actual operation, due to low mark diesel than 0 number diesel price is higher, lead to the working cost of excavator under zero low temperature environment improves. Therefore, how to reduce the working cost of excavator under zero low temperature environment, has become the problem to be solved. UTILITY MODEL CONTENTS

[0004] The utility model embodiment discloses an oil supply system and excavator, can reduce the working cost of excavator under zero low temperature environment, improves the working performance of engine in zero low temperature environment.

[0005] In order to realize the above purpose, first, the utility model discloses an oil supply system, is applied to excavator, the excavator includes engine, the oil supply system includes:

[0006] Main oil tank, the main oil tank oil circuit is connected with engine, the inside of main oil tank is used to accommodate first type fuel oil;

[0007] Auxiliary oil tank, the auxiliary oil tank is connected with the engine oil circuit, the inside of auxiliary oil tank is used to accommodate second type fuel oil;

[0008] Heating module, the heating end of heating module is arranged in the inside of main oil tank, and the heating module is used to heat the first type fuel oil in the main oil tank;

[0009] Wherein, the engine is used to work according to the second type fuel oil or heated first type fuel oil.

[0010] As an optional implementation, in the embodiment of the utility model first aspect, the heating module includes:

[0011] Heater, the heater is connected with the auxiliary oil tank oil circuit, and the heater is used to accommodate coolant, and the water inlet of heater is connected with the cooling module water circuit of engine, and the heater is used to heat the coolant according to the second type fuel oil;Wherein, the engine is used to cool according to the heated coolant received by its cooling module;

[0012] The heat exchanger is arranged in the main oil tank, and is connected with the heater and a cooling module water passage of the engine respectively, and is used for heating the first type of fuel in the main oil tank according to the heated cooling liquid.

[0013] As an optional implementation, in the embodiment of the first aspect of the utility model, the heating module further comprises:

[0014] The water pump is connected with the water outlet of the heater in a water passage;

[0015] The water collecting valve is connected with the heat exchanger in a water passage, the water inlet of the water collecting valve is connected with the water pump in a water passage, and the water outlet of the water collecting valve is connected with the water return of the heater in a water passage;

[0016] The water pump is used for conveying the heated cooling liquid to the heat exchanger through the water collecting valve.

[0017] As an optional implementation, in the embodiment of the first aspect of the utility model, the oil supply system further comprises:

[0018] A controller;

[0019] A temperature detection module is used for detecting the working temperature of the main oil tank, and the temperature detection module is electrically connected with the controller;

[0020] An oil passage switching module is connected with the engine, the main oil tank and the auxiliary oil tank in an oil passage respectively, and the oil passage switching module is electrically connected with the controller;

[0021] The controller is used for generating an oil passage control signal according to the working temperature, and the oil passage switching module is used for switching the oil passage connection between the engine and the main oil tank or the auxiliary oil tank according to the oil passage control signal.

[0022] As an optional implementation, in the embodiment of the first aspect of the utility model, the working temperature comprises a fuel temperature and an ambient temperature, and the temperature detection module comprises:

[0023] A fuel temperature sensor is arranged in the main oil tank, and is used for detecting the fuel temperature of the first type of fuel, and the fuel temperature sensor is electrically connected with the controller;

[0024] An ambient temperature sensor is used for detecting the ambient temperature of an external working environment, and the ambient temperature sensor is electrically connected with the controller;

[0025] The controller is configured to generate an oil circuit control signal according to the fuel temperature and the ambient temperature, and the oil circuit switching module is configured to switch the engine to be connected to the main oil tank or the auxiliary oil tank according to the oil circuit control signal.

[0026] As an optional implementation, in the embodiment of the first aspect of the present application, the oil circuit control signal comprises a main oil supply control signal or an auxiliary oil supply control signal, and the oil circuit switching module comprises:

[0027] a first switching valve, which is electrically connected to the controller, and is connected to the oil outlet of the main oil tank, the oil outlet of the auxiliary oil tank and the oil inlet of the engine, respectively;

[0028] a second switching valve, which is electrically connected to the controller, and is connected to the oil return port of the main oil tank, the oil return port of the auxiliary oil tank and the oil return port of the engine, respectively;

[0029] The first switching valve is configured to switch the oil inlet of the engine to be connected to the oil outlet of the main oil tank according to the main oil supply control signal, and the second switching valve is configured to switch the oil return port of the engine to be connected to the oil return port of the main oil tank according to the main oil supply control signal; the first switching valve is configured to switch the oil inlet of the engine to be connected to the oil outlet of the auxiliary oil tank according to the auxiliary oil supply control signal, and the second switching valve is configured to switch the oil return port of the engine to be connected to the oil return port of the auxiliary oil tank according to the auxiliary oil supply control signal.

[0030] As an optional implementation, in the embodiment of the first aspect of the present application, the system further comprises:

[0031] a heating switch, which is electrically connected to the controller and the heating module, respectively; wherein the controller is further configured to generate a heating control signal according to the working temperature, the heating switch is configured to generate a switching signal according to the received touch control signal or the heating control signal, and the heating module is configured to start the heating operation of the first type of fuel according to the switching signal.

[0032] As an optional implementation, in the embodiment of the first aspect of the present application, the oil supply system further comprises:

[0033] a display, which is electrically connected to the controller;

[0034] A first fuel level sensor is disposed inside the main fuel tank and is electrically connected to the controller. The first fuel level sensor is used to detect the first fuel level of the first type of fuel in the main fuel tank.

[0035] The second fuel level sensor is located inside the auxiliary fuel tank and is electrically connected to the controller. The second fuel level sensor is used to detect the second fuel level of the second type of fuel in the auxiliary fuel tank.

[0036] The controller is used to generate a fuel level display signal based on the first fuel level and the second fuel level, and the display is used to display the fuel level of the first type of fuel and the fuel level of the second type of fuel based on the fuel level display signal.

[0037] Secondly, this utility model discloses an excavator, characterized in that it comprises:

[0038] engine;

[0039] As described in the first aspect of this utility model, the main fuel tank and the auxiliary fuel tank are both connected to the engine oil circuit, and the engine is used to operate based on the second type of fuel or the first type of fuel after heating.

[0040] As an optional implementation, in an embodiment of the second aspect of this utility model, the excavator further includes:

[0041] A power supply module is electrically connected to the heating module and is used to supply power to the heating module.

[0042] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0043] The fuel supply system provided by this utility model can first start the engine with the second type of fuel in the auxiliary fuel tank, and then heat the first type of fuel in the main fuel tank, which has a lower cost, through the heating module. This avoids the problem of waxing of the first type of fuel in sub-zero low temperature environments. Then, the first type of fuel is switched as the fuel supply source for the engine, thereby reducing the operating cost in sub-zero low temperature environments and improving the engine's operating performance in sub-zero low temperature environments.

[0044] The excavator provided by this utility model adopts the above-mentioned fuel supply system. The engine is started by the second type of fuel in the auxiliary fuel tank of the fuel supply system. Then, the lower-cost first type of fuel in the main fuel tank is heated by the heating module, which avoids the problem of waxing of the first type of fuel in the sub-zero low temperature environment. Then, the first type of fuel is switched as the fuel supply source for the engine, thereby reducing the operating cost of the excavator in the sub-zero low temperature environment and improving the working performance of the excavator's engine in the sub-zero low temperature environment. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of the first embodiment of the oil supply system in this utility model;

[0046] Figure 2 This is a schematic diagram of the structure of the second embodiment of the oil supply system in this utility model;

[0047] Figure 3 This is a schematic diagram of the third embodiment of the oil supply system in this utility model;

[0048] Figure 4 This is a schematic diagram of the fourth embodiment of the oil supply system in this utility model.

[0049] The meanings of the reference numerals in the attached figures are as follows:

[0050] 110. Main fuel tank; 120. Auxiliary fuel tank; 130. Heating module; 131. Heater; 132. Heat exchanger; 133. Water pump; 134. Water collection valve; 140. Controller; 150. Temperature detection module; 151. Fuel temperature sensor; 152. Ambient temperature sensor; 160. Fuel circuit switching module; 161. First switching valve; 162. Second switching valve; 170. Heating switch; 180. Display; 191. First fuel level sensor; 192. Second fuel level sensor; 210. Engine. Detailed Implementation

[0051] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0052] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0053] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0054] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0055] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0056] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0057] Currently, in sub-zero temperatures, excavators often experience reduced engine performance due to the waxing of commonly used No. 0 diesel fuel, resulting in poor fluidity. To address this issue, it's generally necessary to switch to a lower-grade diesel fuel, such as No. -35 diesel for environments as low as -30°C.

[0058] However, in practice, the higher price of low-grade diesel fuel compared to No. 0 diesel increases the operating costs of excavators in sub-zero temperatures. Therefore, reducing the operating costs of excavators in sub-zero environments has become an urgent problem to be solved.

[0059] In response, this utility model discloses a fuel supply system and an excavator, which can reduce the operating cost of the excavator in sub-zero low-temperature environments and improve the engine's operating performance in sub-zero low-temperature environments.

[0060] like Figure 1 As shown, this utility model discloses a fuel supply system, which includes a main fuel tank 110, an auxiliary fuel tank 120, and a heating module 130. The main fuel tank 110 is connected to an engine 210 via a fuel line, and the interior of the main fuel tank 110 is used to hold a first type of fuel. The auxiliary fuel tank 120 is connected to the engine 210 via a fuel line, and the interior of the auxiliary fuel tank 120 is used to hold a second type of fuel. The heating end of the heating module 130 is disposed inside the main fuel tank 110, and the heating module 130 is used to heat the first type of fuel in the main fuel tank 110. The engine 210 is used to operate based on the second type of fuel or the heated first type of fuel.

[0061] In this embodiment, the first type of fuel is a high-octane fuel that is prone to waxing at sub-zero temperatures, such as No. 0 diesel or No. 5 diesel. The second type of fuel is a low-octane fuel that does not wax at the corresponding sub-zero temperature range, such as No. -20 diesel or No. -35 diesel.

[0062] Furthermore, the engine 210 is connected to the main oil tank 110 and the auxiliary oil tank 120 via oil circuits, and the heating end of the heating module 130 is located inside the main oil tank 110. The engine 210 is installed in working machinery such as excavators to provide power for the operation of the working machinery.

[0063] When the fuel supply system and engine 210 are in sub-zero temperature environments, the engine 210 can be started first using the second type of fuel from the auxiliary fuel tank 120 to put the entire working instrument into operation. After the engine 210 starts, the heating module 130 heats the first type of fuel inside the main fuel tank 110 through its heating end, raising the temperature of the first type of fuel to above a preset temperature threshold. Subsequently, the heated first type of fuel is switched to supply fuel to the engine 210.

[0064] As can be seen, the fuel supply system of this utility model can first start the engine 210 of the working instrument through the second type of fuel in the auxiliary fuel tank 120, and then heat the lower-cost first type of fuel in the main fuel tank 110 through the heating module 130, avoiding the problem of waxing of the first type of fuel in the sub-zero low temperature environment. Then, the first type of fuel is switched as the fuel supply source of the engine 210, thereby reducing the working cost of the working instrument in the sub-zero low temperature environment and improving the working performance of the engine 210 in the sub-zero low temperature environment.

[0065] like Figure 2As shown, in an optional embodiment, the heating module 130 includes a heater 131 and a heat exchanger 132. The heater 131 is connected to the auxiliary fuel tank 120 via an oil circuit and is used to contain coolant. The water inlet of the heater 131 is connected to the cooling module water circuit of the engine 210. The heater 131 is used to heat the coolant according to the second type of fuel, wherein the engine 210 is used to cool the coolant received by its cooling module. The heat exchanger 132 is disposed inside the main fuel tank 110 and is connected to both the heater 131 and the cooling module water circuit of the engine 210. The heat exchanger 132 is used to heat the first type of fuel in the main fuel tank 110 according to the heated coolant.

[0066] In this optional embodiment, the auxiliary fuel tank 120 is connected to the heater 131 via an oil circuit. The auxiliary fuel tank 120 provides the heater 131 with a second type of fuel, which is used to heat the coolant contained inside the heater 131. The cooling module of the engine 210 is connected to the water circuit of the heater 131 via a water inlet, enabling coolant circulation between the cooling module of the engine 210 and the heater 131.

[0067] Heater 131 delivers heated coolant to the cooling module of engine 210. The heated coolant in the cooling module cools engine 210, ensuring that engine 210 can maintain a normal body temperature in sub-zero environments, thereby improving the operating performance of the working equipment in sub-zero environments. After cooling engine 210, coolant is delivered from the cooling module to heater 131, where heater 131 reheats the coolant, thus forming a coolant circulation.

[0068] Furthermore, the main fuel tank 110 is equipped with a heat exchanger 132, which is connected to the water passage between the heater 131 and the engine 210. The coolant heated by the heater 131 can also be delivered to the heat exchanger 132, which uses the received coolant to heat the first type of fuel in the main fuel tank 110.

[0069] As can be seen, this optional embodiment can also cool the engine 210 using the coolant heated by the heater 131, thereby ensuring that the engine 210 can maintain a normal body temperature in sub-zero temperature environments, thus improving the operating performance of the working equipment in sub-zero temperature environments. At the same time, the heat exchanger 132 can also heat the first type of fuel in the main fuel tank 110 using the coolant heated by the heater 131, avoiding the problem of the first type of fuel waxing and becoming unusable as a fuel source in sub-zero temperature environments, thereby reducing the operating cost of the working equipment in sub-zero temperature environments.

[0070] like Figure 3 As shown, in an optional embodiment, the heating module 130 further includes a water pump 133 and a water collection valve 134. The water pump 133 is connected to the water outlet of the heater 131; the water collection valve 134 is connected to the water collection port of the heat exchanger 132, the water inlet of the water collection valve 134 is connected to the water pump 133, and the water outlet of the water collection valve 134 is connected to the water return port of the heater 131; wherein, the water pump 133 is used to transport the heated coolant to the heat exchanger 132 through the water collection valve 134.

[0071] In this optional embodiment, the water pump 133 is connected to the inlet of the water collecting valve 134 and the outlet of the heater 131, respectively. The water pump 133 can pump the coolant heated by the heater 131 to the water collecting valve 134. It is understood that the water pump 133 can be an electronic water pump 133, and the electronic water pump 133 can be selected as a unidirectional pump.

[0072] Furthermore, the heat exchanger 132 is connected to the water collection port of the water collection valve 134. The water collection valve 134 delivers the received coolant to the heat exchanger 132 for heating the first type of fuel in the main fuel tank 110. The water collection valve 134 is also connected to the water outlet of the cooling module through its outlet. The water collection valve 134 can discharge the coolant used by the heat exchanger 132 to the heater 131 for reheating of the coolant by the heater 131. This creates a coolant circulation system among the heater 131, the cooling module of the engine 210, the electric water pump 133, the water collection valve 134, and the heat exchanger 132.

[0073] As can be seen, this optional embodiment can also use water pump 133 to transport heated coolant to heat exchanger 132 through water collection valve 134, so that heat exchanger 132 can heat the first type of fuel. Then, the coolant used by heat exchanger 132 can be transported back to heater 131 through water collection valve 134 to heat the coolant again, thereby improving the utilization rate of coolant and improving the heating efficiency of the first type of fuel in main fuel tank 110.

[0074] like Figure 4As shown, in an optional embodiment, the fuel supply system further includes a controller 140, a temperature detection module 150, and a fuel circuit switching module 160. The temperature detection module 150 is used to detect the operating temperature of the main fuel tank 110, and is electrically connected to the controller 140; the fuel circuit switching module 160 is connected to the fuel circuits of the engine 210, the main fuel tank 110, and the auxiliary fuel tank 120, and is electrically connected to the controller 140; wherein, the controller 140 is used to generate a fuel circuit control signal based on the operating temperature, and the fuel circuit switching module 160 is used to switch the fuel circuit connection of the engine 210 to the main fuel tank 110 or the auxiliary fuel tank 120 based on the fuel circuit control signal.

[0075] In this optional embodiment, the controller 140 is electrically connected to the temperature detection module 150 and the fuel line switching module 160, respectively. The engine 210, the main fuel tank 110, and the auxiliary fuel tank 120 are all connected to the fuel line switching module 160 via fuel lines. The controller 140 generates a fuel line control signal based on the operating temperature of the main fuel tank 110 detected by the temperature detection module 150, thereby controlling the fuel line switching module 160 to perform corresponding fuel line switching actions. This allows the engine 210 to switch to supplying fuel to either the main fuel tank 110 or the auxiliary fuel tank 120 at the corresponding operating temperature of the main fuel tank 110.

[0076] For example, when the temperature detection module 150 detects that the operating temperature is lower than the preset operating temperature threshold, the controller 140 controls the oil circuit switching module 160 through the oil circuit control signal. At this time, the oil circuit switching module 160 switches the oil circuit between the engine 210 and the auxiliary oil tank 120 to be connected, and the oil circuit between the engine 210 and the main oil tank 110 to be disconnected, so that the engine 210 can start working with the second type of fuel in the auxiliary oil tank 120 as the fuel supply source.

[0077] After the heat exchanger 132 completes the heating operation of the first type of fuel in the main fuel tank 110 or is no longer in a sub-zero low temperature environment, the temperature detection module 150 will detect that the operating temperature is higher than the preset operating temperature threshold. The controller 140 controls the oil circuit switching module 160 through the oil circuit control signal. At this time, the oil circuit switching module 160 switches the oil circuit between the engine 210 and the main fuel tank 110 to be connected, and the oil circuit between the engine 210 and the auxiliary fuel tank 120 to be disconnected, so that the engine 210 can start working with the first type of fuel in the main fuel tank 110 as the fuel source.

[0078] As can be seen, this optional embodiment can also detect the working temperature of the main fuel tank 110 through the temperature detection module 150. The controller 140 controls the oil circuit switching module 160 to switch the fuel supply source of the engine 210 according to the detected working temperature, so that the excavator can preferentially use the low-grade second-class fuel to start the engine 210 in the sub-zero low temperature environment. After completing the heating operation of the high-grade first-class fuel or after the excavator is no longer in the sub-zero low temperature environment, the first-class fuel is switched to be used as the fuel supply source of the engine 210, thereby improving the working efficiency of the excavator.

[0079] like Figure 4 As shown, in an optional embodiment, the operating temperature includes fuel temperature and ambient temperature. The temperature detection module 150 includes a fuel temperature sensor 151 and an ambient temperature sensor 152. The fuel temperature sensor 151 is located inside the main fuel tank 110 and is used to detect the fuel temperature of the first type of fuel. The fuel temperature sensor 151 is electrically connected to the controller 140. The ambient temperature sensor 152 is used to detect the ambient temperature of the external operating environment and is electrically connected to the controller 140. The controller 140 is used to generate a fuel circuit control signal based on the fuel temperature and ambient temperature. The fuel circuit switching module 160 is used to switch the fuel circuit connection between the engine 210 and the main fuel tank 110 or the auxiliary fuel tank 120 based on the fuel circuit control signal.

[0080] In this optional embodiment, the ambient temperature sensor 152 can be located externally to the working machine to detect the ambient temperature of the environment in which the fuel supply system and engine 210 are located. The fuel temperature sensor 151 is located in the main fuel tank 110 so that it can detect the fuel temperature of the first type of fuel.

[0081] The controller 140 is electrically connected to the fuel temperature sensor 151 and the ambient temperature sensor 152, respectively. The controller 140 combines the fuel temperature and ambient temperature to generate corresponding fuel circuit control signals to control the fuel circuit switching module 160 to perform corresponding fuel circuit switching actions. For example, the controller 140 can determine whether the difference between the fuel temperature and the ambient temperature exceeds a preset temperature difference value, thereby determining whether the fuel circuit switching module 160 switches the fuel circuit connection between the engine 210 and the main fuel tank 110 or the auxiliary fuel tank 120.

[0082] As can be seen, this optional embodiment can also specifically determine whether the engine 210 uses the main fuel tank 110 or the auxiliary fuel tank 120 for fuel supply based on the fuel temperature and ambient temperature, thereby improving the accuracy of the fuel supply system in switching the fuel supply source according to the temperature.

[0083] like Figure 4As shown, in an optional embodiment, the oil circuit control signal includes a main oil supply control signal or a secondary oil supply control signal, and the oil circuit switching module 160 includes a first switching valve 161 and a second switching valve 162. The first switching valve 161 is electrically connected to the controller 140 and is connected to the oil circuits of the main oil tank 110 outlet, the secondary oil tank 120 outlet, and the engine 210 inlet. The second switching valve 162 is electrically connected to the controller 140 and is connected to the oil circuits of the main oil tank 110 return port, the secondary oil tank 120 return port, and the engine 210 return port. The first switching valve 161 is used to switch the engine 210 according to the main oil supply control signal. The oil inlet of engine 210 is connected to the oil outlet of main oil tank 110, and the second switching valve 162 is used to switch the oil return port of engine 210 to the oil return port of main oil tank 110 according to the main oil supply control signal; the first switching valve 161 is used to switch the oil inlet of engine 210 to the oil outlet of auxiliary oil tank 120 according to the auxiliary oil supply control signal, and the second switching valve 162 is used to switch the oil return port of engine 210 to the oil return port of auxiliary oil tank 120 according to the auxiliary oil supply control signal.

[0084] In this optional embodiment, the oil outlets of both the main oil tank 110 and the auxiliary oil tank 120 are connected to the oil inlet of the first switching valve 161, and the oil outlet of the first switching valve 161 is connected to the oil inlet of the engine 210. The oil return port of the engine 210 is connected to the oil inlet of the second switching valve 162, and the oil outlet of the second switching valve 162 is connected to the oil return ports of both the main oil tank 110 and the auxiliary oil tank 120.

[0085] The controller 140 is electrically connected to the first switching valve 161 and the second switching valve 162 respectively. When the temperature detection module 150 detects that the operating temperature is lower than the preset operating temperature threshold, the controller 140 generates a secondary fuel supply control signal to control the first switching valve 161 to switch the oil circuit between the oil inlet of the engine 210 and the oil outlet of the auxiliary fuel tank 120, and to control the second switching valve 162 to switch the oil circuit between the oil return port of the engine 210 and the oil return port of the auxiliary fuel tank 120, so that the engine 210 can start working with the second type of fuel in the auxiliary fuel tank 120 as the fuel supply source.

[0086] After the heat exchanger 132 completes the heating operation of the first type of fuel in the main fuel tank 110 or is no longer in a sub-zero low temperature environment, the temperature detection module 150 will detect that the operating temperature is higher than the preset operating temperature threshold. The controller 140 generates a main fuel supply control signal to control the first switching valve 161 to switch the oil circuit between the oil inlet of the engine 210 and the oil outlet of the main fuel tank 110, and to control the second switching valve 162 to switch the oil circuit between the oil return port of the engine 210 and the oil return port of the main fuel tank 110, so that the engine 210 can start working with the first type of fuel in the main fuel tank 110 as the fuel supply source.

[0087] As can be seen, this optional embodiment can also realize the switching operation of the fuel supply source of engine 210 through the first switching valve 161 and the second switching valve 162, so that after the switching operation of the fuel supply source is completed, engine 210 and fuel supply source can form an effective return oil cycle, thereby further improving the working efficiency of engine 210.

[0088] like Figure 4 As shown, in an optional embodiment, the fuel supply system further includes a heating switch 170, which is electrically connected to the controller 140 and the heating module 130 respectively. The controller 140 is further configured to generate a heating control signal based on the operating temperature, the heating switch 170 is configured to generate a switch signal based on the received touch signal or heating control signal, and the heating module 130 is configured to initiate the heating operation of the first type of fuel based on the switch signal.

[0089] In this optional embodiment, both the controller 140 and the heater 131 of the heating module 130 are electrically connected to the heating switch 170. The controller 140 receives the operating temperature detected by the temperature detection module 150, generates a heating control signal when the operating temperature is lower than a preset operating temperature threshold, and sends the heating control signal to the heating switch 170.

[0090] After receiving a heating control signal from the controller 140, or after receiving a touch signal generated by the operator through a touch button or other means, the heating switch 170 generates a switch signal and sends the switch signal to the heater 131 of the heating module 130, so that the heater 131 starts the heating operation of the first type of fuel according to the switch signal.

[0091] As can be seen, this optional embodiment can also control the heating function of the heating module 130 by directly controlling the heating switch 170 or automatically controlling the heating switch 170 by detecting the working temperature, thereby improving the operability of the heating module 130 in the oil supply system.

[0092] like Figure 4As shown, in an optional embodiment, the fuel supply system further includes a display 180, a first fuel level sensor 191, and a second fuel level sensor 192. The display 180 is electrically connected to the controller 140. The first fuel level sensor 191 is located inside the main fuel tank 110 and is electrically connected to the controller 140. The first fuel level sensor 191 is used to detect the first fuel level of the first type of fuel in the main fuel tank 110. The second fuel level sensor 192 is located inside the auxiliary fuel tank 120 and is electrically connected to the controller 140. The second fuel level sensor 192 is used to detect the second fuel level of the second type of fuel in the auxiliary fuel tank 120. The controller 140 generates a fuel level display signal based on the first and second fuel levels, and the display 180 displays the fuel levels of the first and second types of fuel based on the fuel level display signal.

[0093] In this optional embodiment, a first fuel level sensor 191 is installed inside the main fuel tank 110, which can detect the first fuel level of the first type of fuel in the main fuel tank 110. A second fuel level sensor 192 is installed inside the auxiliary fuel tank 120, which can detect the second fuel level of the second type of fuel in the auxiliary fuel tank 120. The controller 140 is electrically connected to the first fuel level sensor 191 and the second fuel level sensor 192 respectively. The controller 140 integrates the received first and second fuel level signals into a fuel level display signal and sends it to the display 180. After receiving the fuel level display signal, the display 180 can display the first fuel level of the first type of fuel in the main fuel tank 110 and the second fuel level of the second type of fuel in the auxiliary fuel tank 120 on the screen of the display 180, so that the operator can know the remaining amount of the first and second types of fuel in real time.

[0094] As can be seen, this optional embodiment can also obtain the oil level of the first type of fuel in the main oil tank 110 through the first oil level sensor 191, and obtain the oil level of the second type of fuel in the auxiliary oil tank 120 through the second oil level sensor 192, and display the oil levels of the first type of fuel and the second type of fuel on the display 180, so that the operator can know the remaining amount of the first type of fuel and the second type of fuel in real time, thereby improving the operational convenience of the fuel supply system.

[0095] This utility model also discloses an excavator, the membrane cooler including an engine 210 and the oil supply system described in the above embodiments of this utility model. The main oil tank 110 and the auxiliary oil tank 120 are both connected to the oil circuit of the engine 210, which operates using either second-class fuel or heated first-class fuel.

[0096] As can be seen, in this embodiment, the excavator can first start the engine 210 with the second type of fuel in the auxiliary fuel tank 120, and then heat the lower-cost first type of fuel in the main fuel tank 110 through the heating module 130, avoiding the problem of waxing of the first type of fuel in the sub-zero low temperature environment. Then, the first type of fuel is switched as the fuel source for the engine 210, thereby reducing the operating cost of the excavator in the sub-zero low temperature environment and improving the working performance of the engine 210 in the sub-zero low temperature environment.

[0097] In an optional embodiment, the excavator further includes a power supply module electrically connected to the heating module 130, which supplies power to the heating module 130. Specifically, in this optional embodiment, the power supply module can supply power to the heater 131 of the heating module 130, and can also supply power to electronic devices such as the controller 140 and display 180 mentioned in the above embodiments. Further, the power supply module may include a battery pack.

[0098] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An oil supply system, characterized in that, The oil supply system includes: The main fuel tank is connected to the engine via a fuel line, and the interior of the main fuel tank is used to contain Type I fuel. An auxiliary fuel tank is connected to the engine fuel line, and the interior of the auxiliary fuel tank is used to contain Category II fuel. A heating module, wherein the heating end of the heating module is disposed inside the main fuel tank, and the heating module is used to heat the first type of fuel in the main fuel tank; The engine is used to operate based on the second type of fuel or the first type of fuel after heating; The heating module includes: A heater is connected to the auxiliary fuel tank oil circuit and is used to contain coolant. The heater's inlet is connected to the engine's cooling module water circuit. The heater is used to heat the coolant according to the second type of fuel. The engine is used to cool itself according to the heated coolant received by its cooling module. A heat exchanger is disposed inside the main fuel tank and is connected to the heater and the cooling module water circuit of the engine. The heat exchanger is used to heat the first type of fuel in the main fuel tank according to the heated coolant.

2. The oil supply system according to claim 1, characterized in that, The heating module also includes: A water pump, wherein the water pump is connected to the outlet water passage of the heater; A water collecting valve, wherein the water collecting port of the water collecting valve is connected to the water circuit of the heat exchanger, the water inlet of the water collecting valve is connected to the water circuit of the water pump, and the water outlet of the water collecting valve is connected to the water return port of the heater. The water pump is used to deliver the heated coolant to the heat exchanger through the water collection valve.

3. The oil supply system according to claim 1 or 2, characterized in that, The oil supply system also includes: Controller; A temperature detection module is used to detect the operating temperature of the main oil tank, and the temperature detection module is electrically connected to the controller; The oil circuit switching module is connected to the oil circuits of the engine, the main oil tank and the auxiliary oil tank respectively, and is electrically connected to the controller; The controller is used to generate an oil circuit control signal based on the operating temperature, and the oil circuit switching module is used to switch the oil circuit connection between the engine and the main oil tank or the auxiliary oil tank based on the oil circuit control signal.

4. The oil supply system according to claim 3, characterized in that, The operating temperature includes fuel temperature and ambient temperature, and the temperature detection module includes: A fuel temperature sensor is disposed inside the main fuel tank. The fuel temperature sensor is used to detect the fuel temperature of the first type of fuel. The fuel temperature sensor is electrically connected to the controller. An ambient temperature sensor is used to detect the ambient temperature of the external working environment, and the ambient temperature sensor is electrically connected to the controller. The controller is used to generate a fuel circuit control signal based on the fuel temperature and the ambient temperature, and the fuel circuit switching module is used to switch the fuel circuit connection between the engine and the main fuel tank or the auxiliary fuel tank based on the fuel circuit control signal.

5. The oil supply system according to claim 3, characterized in that, The oil circuit control signal includes a main oil supply control signal or a secondary oil supply control signal, and the oil circuit switching module includes: The first switching valve is electrically connected to the controller and is connected to the oil outlet of the main oil tank, the oil outlet of the auxiliary oil tank, and the oil inlet of the engine. The second switching valve is electrically connected to the controller and is connected to the oil return port of the main oil tank, the oil return port of the auxiliary oil tank, and the oil return port of the engine, respectively. Wherein, the first switching valve is used to switch the connection between the engine's oil inlet and the main oil tank's oil outlet according to the main fuel supply control signal, and the second switching valve is used to switch the connection between the engine's oil return port and the main oil tank's oil return port according to the main fuel supply control signal; the first switching valve is used to switch the connection between the engine's oil inlet and the auxiliary oil tank's oil outlet according to the auxiliary fuel supply control signal, and the second switching valve is used to switch the connection between the engine's oil return port and the auxiliary oil tank's oil return port according to the auxiliary fuel supply control signal.

6. The oil supply system according to claim 3, characterized in that, The system also includes: A heating switch is electrically connected to both the controller and the heating module. The controller is further configured to generate a heating control signal based on the operating temperature. The heating switch is configured to generate a switch signal based on a received touch signal or the heating control signal. The heating module is configured to initiate the heating operation of the first type of fuel based on the switch signal.

7. The oil supply system according to claim 3, characterized in that, The oil supply system also includes: The display is electrically connected to the controller; A first fuel level sensor is disposed inside the main fuel tank and is electrically connected to the controller. The first fuel level sensor is used to detect the first fuel level of the first type of fuel in the main fuel tank. The second fuel level sensor is located inside the auxiliary fuel tank and is electrically connected to the controller. The second fuel level sensor is used to detect the second fuel level of the second type of fuel in the auxiliary fuel tank. The controller is used to generate a fuel level display signal based on the first fuel level and the second fuel level, and the display is used to display the fuel level of the first type of fuel and the fuel level of the second type of fuel based on the fuel level display signal.

8. An excavator, characterized in that, include: engine; The fuel supply system as described in any one of claims 1 to 7, wherein both the main fuel tank and the auxiliary fuel tank are connected to the engine fuel line, and the engine is used to operate based on the second type of fuel or the first type of fuel after heating.

9. The excavator according to claim 8, characterized in that, The excavator also includes: A power supply module is electrically connected to the heating module and is used to supply power to the heating module.

Images