Temperature adjusting system, engine system and vehicle

Abstract

The utility model belongs to the technical field of vehicles, and discloses a temperature adjusting system, an engine system and a vehicle. The temperature adjusting system comprises a hydraulic torque converter, a temperature adjusting assembly and an EGR assembly. The temperature adjusting assembly is used for adjusting the temperature of hydraulic oil flowing through the hydraulic torque converter. The hydraulic oil input end of the hydraulic torque converter, the first hydraulic oil output end of the hydraulic torque converter and the temperature adjusting assembly form a temperature adjusting loop. A heat exchange loop can be formed by the hydraulic oil input end of the hydraulic torque converter, the second hydraulic oil output end of the hydraulic torque converter and the heat exchange channel of the EGR assembly. The EGR assembly can be effectively prevented from being frozen, the oil consumption of a vehicle can be effectively reduced, the pipeline arrangement difficulty can be effectively reduced, the working performance of an engine system can be effectively improved, the service life of the engine system can be effectively prolonged, and the driving comfort of a driver can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a temperature control system, an engine system and a vehicle. Background Art

[0002] For vehicles using liquefied natural gas engine systems, the combustion products of liquefied natural gas engines contain a large amount of water. When the vehicle is used at an ambient temperature below a certain level and the vehicle is running at a low speed and low load or idling, although the EGR valve is closed or has a very small opening, the valve plate and valve seat of the EGR valve cannot be completely sealed, resulting in a slight leakage of the EGR valve in the closed state. Since the air temperature after intercooling is basically equal to the ambient temperature, the gaseous water in the leaked EGR gas will enter the mixer and mix with the air after intercooling and will be condensed into liquid water. Due to the small air flow rate under this operating condition, the condensed liquid water cannot be brought into the engine cylinder, resulting in liquid water adhering to the mixer, EGR valve, and / or the pipeline connecting the EGR valve and the mixer and freezing, which will cause the EGR valve to get stuck and report an error. As the operating time under this operating condition continues to increase, the amount of ice will continue to increase. In severe cases, the mixer will be blocked, causing the engine to be underpowered or stall.

[0003] In view of the above phenomenon, the prior art usually adopts heat exchange of engine coolant to heat the EGR valve and mixer, but the coolant temperature is low when the engine is cold started, and while the heat exchange heats the EGR valve and mixer, it is also necessary to heat the carburetor synchronously, heat the heater, etc. This results in a slow rise in the temperature of the coolant during cold start, high fuel consumption of the vehicle, high power consumption of the circulating pump driving the coolant flow, high failure rate of the engine system, and reduced service life of the engine system. Utility Model Content

[0004] The utility model aims to provide a temperature control system, an engine system and a vehicle to solve the above-mentioned problems existing in heating an EGR valve and a mixer by heat exchange of engine coolant.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A temperature control system, comprising a torque converter, a temperature control component and an EGR component, wherein the temperature control component is used to adjust the temperature of the hydraulic oil flowing through the torque converter;

[0007] The hydraulic oil input end of the hydraulic torque converter, the first hydraulic oil output end of the hydraulic torque converter and the thermostat component form a thermostat circuit;

[0008] The hydraulic oil input end of the hydraulic torque converter, the second hydraulic oil output end of the hydraulic torque converter and the heat exchange channel of the EGR component can form a heat exchange loop.

[0009] As a preferred solution of the above-mentioned temperature control system, the temperature control system further includes a control valve, and the control valve can adjust the flow rate of the hydraulic oil delivered from the second hydraulic oil output end to the heat exchange channel of the EGR component.

[0010] As a preferred solution of the above temperature control system, the control valve is a flow control valve.

[0011] As a preferred solution of the above-mentioned temperature control system, the pipeline connecting the first hydraulic oil output end and the input end of the temperature control component is the first pipeline, and the pipeline connecting the second hydraulic oil output end and the input end of the heat exchange channel of the EGR component is the second pipeline;

[0012] The diameter of the first pipeline is greater than the diameter of the second pipeline.

[0013] As a preferred solution of the above-mentioned temperature control system, the EGR component includes an EGR valve, and the hydraulic oil input end of the torque converter, the second hydraulic oil output end of the torque converter and the heat exchange channel of the EGR valve can form the heat exchange circuit.

[0014] As a preferred solution of the above-mentioned temperature control system, the EGR component also includes a Venturi tube distributed downstream of the EGR valve, and both ends of the heat exchange channel of the Venturi tube are respectively connected to the heat exchange channel of the EGR valve and the hydraulic oil input end of the torque converter.

[0015] As a preferred solution of the above-mentioned temperature control system, the EGR component also includes a mixer distributed downstream of the EGR valve, and both ends of the heat exchange channel of the mixer are respectively connected to the heat exchange channel of the EGR valve and the hydraulic oil input end of the torque converter.

[0016] As a preferred solution of the above temperature control system, the temperature control component includes a thermostat and a hydraulic oil radiator; the temperature control circuit includes a first sub-temperature control circuit and a second sub-temperature control circuit;

[0017] The hydraulic oil input end of the hydraulic torque converter, the first hydraulic oil output end of the hydraulic torque converter, the input end of the thermostat, the first output end of the thermostat and the hydraulic oil radiator form the first sub-temperature regulating circuit;

[0018] The hydraulic oil input end of the hydraulic torque converter, the first hydraulic oil output end of the hydraulic torque converter, the input end of the thermostat and the second output end of the thermostat form the second sub-temperature control loop.

[0019] An engine system includes the above-mentioned temperature control system.

[0020] A vehicle includes the above-mentioned engine system.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a temperature control system, an engine system and a vehicle, wherein the temperature control system comprises a torque converter, a temperature control component and an EGR component, the temperature control component is used to adjust the temperature of the hydraulic oil flowing through the torque converter; the hydraulic oil input end of the torque converter, the first hydraulic oil output end of the torque converter and the temperature control component form a temperature control loop; the hydraulic oil input end of the torque converter, the second hydraulic oil output end of the torque converter and the heat exchange channel of the EGR component can form a heat exchange loop.

[0023] Since the temperature of the hydraulic oil rises quickly when the torque converter is running, the temperature control system is configured so that the hydraulic oil input end of the torque converter, the second hydraulic oil output end of the torque converter and the heat exchange channel of the EGR component can form a heat exchange circuit. When the ambient temperature is lower than the first temperature, the hydraulic oil input end of the torque converter, the second hydraulic oil output end of the torque converter and the heat exchange channel of the EGR component are controlled to form a connected heat exchange circuit, so as to heat the EGR component to avoid the impact of the EGR component freezing on the working performance of the engine system; when the ambient temperature is higher than the first temperature, that is, there is no risk of freezing of the EGR component, the heat exchange circuit formed by the hydraulic oil input end of the torque converter, the second hydraulic oil output end of the torque converter and the heat exchange channel of the EGR component is disconnected. Compared with the prior art, this makes it possible to recover excess heat from the hydraulic oil for heating the EGR component, and the hydraulic oil has a high temperature and a short flow path, which can quickly and efficiently exchange heat to heat the EGR component; secondly, such a setting can also avoid the energy consumption caused by driving the engine coolant to exchange heat to heat the EGR component, thereby reducing the vehicle's fuel consumption, reducing the difficulty of pipeline layout, and reducing the failure rate of the engine system, thereby improving the working performance and service life of the engine system.

[0024] Secondly, the temperature control system arranges the heat exchange channels of the temperature control component and the EGR component in parallel, so that the temperature of the hydraulic oil can be adjusted during the entire operation of the torque converter, thereby effectively ensuring the transmission efficiency of the torque converter and ensuring the reliability of heat exchange and heating of the EGR component.

[0025] Secondly, by adopting the above-mentioned temperature control system, the engine coolant heat exchange heating evaporator, heat exchange heating to the heater, etc., the effect is good and the efficiency is high, so that the driver's driving comfort and driving experience are good. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a temperature control system provided by a specific embodiment of the utility model;

[0027] Figure 2It is a temperature variation curve diagram of hydraulic oil and engine coolant provided by a specific embodiment of the utility model.

[0028] In the figure:

[0029] 1. Torque converter;

[0030] 2. Temperature control assembly; 21. Thermostat; 22. Hydraulic oil radiator;

[0031] 3. EGR assembly; 31. EGR valve; 32. Venturi tube; 33. Mixer;

[0032] 4. Control valve;

[0033] 5. Controller;

[0034] 6. Temperature sensor. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] The utility model provides a temperature control system, such as Figure 1 As shown, the temperature control system includes a torque converter 1, a temperature control component 2 and an EGR component 3. The temperature control component 2 is used to adjust the temperature of the hydraulic oil flowing through the torque converter 1; the hydraulic oil input end of the torque converter 1, the first hydraulic oil output end of the torque converter 1 and the temperature control component 2 form a temperature control circuit; the hydraulic oil input end of the torque converter 1, the second hydraulic oil output end of the torque converter 1 and the heat exchange channel of the EGR component 3 can form a heat exchange circuit.

[0040] Since the temperature of the hydraulic oil rises quickly when the torque converter 1 is running, the temperature control system is configured so that the hydraulic oil input end of the torque converter 1, the second hydraulic oil output end of the torque converter 1 and the heat exchange channel of the EGR component 3 can form a heat exchange circuit. When the ambient temperature is lower than the first temperature, the hydraulic oil input end of the torque converter 1, the second hydraulic oil output end of the torque converter 1 and the heat exchange channel of the EGR component 3 are controlled to form a connected heat exchange circuit, so as to heat the EGR component 3 to avoid the impact of the ice on the working performance of the engine system caused by the ice formation of the EGR component 3; when the ambient temperature is higher than the first temperature, that is, there is no risk of ice formation of the EGR component 3, the heat exchange circuit formed by the hydraulic oil input end of the torque converter 1, the second hydraulic oil output end of the torque converter 1 and the heat exchange channel of the EGR component 3 is disconnected. Compared with the prior art, this makes it possible to recover excess heat of the hydraulic oil for heating the EGR component 3, and the hydraulic oil has a high temperature and a short flow path, and can quickly and efficiently exchange heat to heat the EGR component 3; secondly, such a configuration can also avoid the energy consumption caused by driving the engine coolant to exchange heat to heat the EGR component 3, thereby reducing the fuel consumption of the vehicle, reducing the difficulty of pipeline layout, and reducing the failure rate of the engine system, thereby improving the working performance and service life of the engine system.

[0041] Secondly, the temperature control system is configured with the heat exchange channels of the temperature control component 2 and the EGR component 3 distributed in parallel, so that the temperature of the hydraulic oil can be adjusted during the entire operation of the torque converter 1, thereby effectively ensuring the transmission efficiency of the torque converter 1 and ensuring the reliability of heat exchange and heating of the EGR component 3.

[0042] It is understandable that by adopting the above temperature control system, the engine coolant heat exchange heating carburetor, heat exchange heating to the heater, etc. are effective and efficient, thereby making the driver's driving comfort and driving experience good.

[0043] Specifically, Figure 2 The curve distributed at the bottom is the temperature fluctuation curve of the engine coolant, and the curve distributed at the top is the temperature fluctuation curve of the hydraulic oil. Figure 2 The horizontal axis is time, and the vertical axis is temperature. Figure 2 It can be clearly seen that the temperature rise of the hydraulic oil is fast.

[0044] Among them, Figure 1 As shown, the temperature control system further includes a control valve 4, which can adjust the flow rate of hydraulic oil delivered from the second hydraulic oil output end to the heat exchange channel of the EGR component 3. It can be understood that when the flow rate of hydraulic oil delivered from the second hydraulic oil output end to the heat exchange channel of the EGR component 3 is zero, the second hydraulic oil output end is disconnected from the input end of the heat exchange channel of the EGR component 3.

[0045] Specifically, in this embodiment, the control valve 4 is a flow control valve. The opening of the control valve 4 is adjusted according to the ambient temperature so as to adjust the flow of hydraulic oil delivered to the heat exchange channel of the EGR component 3 to prevent the EGR component 3 from freezing. Preferably, the flow control valve is an electromagnetic flow control valve.

[0046] Optionally, the pipeline connecting the first hydraulic oil output end and the input end of the thermostat component 2 is the first pipeline, and the pipeline connecting the second hydraulic oil output end and the input end of the heat exchange channel of the EGR component 3 is the second pipeline; the diameter of the first pipeline is larger than the diameter of the second pipeline. Setting the diameter of the first pipeline larger than the diameter of the second pipeline can further adjust the flow of hydraulic oil flowing into the heat exchange channel of the EGR component 3.

[0047] As an alternative, the control valve 4 is a switch valve, and the diameter of the first pipeline is larger than the diameter of the second pipeline. It is also possible to control the flow of hydraulic oil flowing into the heat exchange channel of the EGR component 3. Preferably, the switch valve is a solenoid switch valve.

[0048] Among them, Figure 1 As shown, the temperature control system further includes a temperature sensor 6 and a controller 5. The temperature sensor 6 is used to monitor the ambient temperature. The temperature sensor 6 and the control valve 4 are both electrically connected to the controller 5. The controller 5 can control the control valve 4 according to the temperature value monitored by the temperature sensor 6.

[0049] Among them, Figure 1As shown, the EGR assembly 3 includes an EGR valve 31, and the hydraulic oil input end of the torque converter 1, the second hydraulic oil output end of the torque converter 1 and the heat exchange channel of the EGR valve 31 can form a heat exchange loop. Specifically, in this embodiment, the hydraulic oil input end of the torque converter 1, the second hydraulic oil output end of the torque converter 1, the control valve 4 and the heat exchange channel of the EGR valve 31 form a heat exchange loop. When the ambient temperature is lower than the first temperature, the opening of the control valve 4 is adjusted to adjust the hydraulic oil flow delivered to the heat exchange channel of the EGR assembly 3 to prevent the EGR valve 31 from freezing.

[0050] Specifically, Figure 1 As shown, the EGR assembly 3 further includes a venturi tube 32 distributed downstream of the EGR valve 31, and the two ends of the heat exchange channel of the venturi tube 32 are respectively connected to the heat exchange channel of the EGR valve 31 and the hydraulic oil input end of the torque converter 1. Such an arrangement can prevent the EGR valve 31 and the venturi tube 32 from freezing.

[0051] More specifically, if Figure 1 As shown, the EGR assembly 3 further includes a mixer 33 distributed downstream of the EGR valve 31, and the two ends of the heat exchange channel of the mixer 33 are respectively connected to the heat exchange channel of the EGR valve 31 and the hydraulic oil input end of the torque converter 1. Such an arrangement can prevent the EGR valve 31 and the mixer 33 from freezing.

[0052] In this embodiment, if Figure 1 As shown, the venturi tube 32 is distributed downstream of the EGR valve 31, the mixer 33 is distributed downstream of the venturi tube 32, and the hydraulic oil input end of the hydraulic torque converter 1, the second hydraulic oil output end of the hydraulic torque converter 1, the control valve 4, the heat exchange channel of the EGR valve 31, the heat exchange channel of the venturi tube 32 and the heat exchange channel of the mixer 33 form a heat exchange loop, so as to prevent the EGR valve 31, the venturi tube 32 and the mixer 33 from freezing.

[0053] Among them, Figure 1As shown, the temperature control component 2 includes a thermostat 21 and a hydraulic oil radiator 22; the temperature control circuit includes a first sub-temperature control circuit and a second sub-temperature control circuit; the hydraulic oil input end of the torque converter 1, the first hydraulic oil output end of the torque converter 1, the input end of the thermostat 21, the first output end of the thermostat 21 and the hydraulic oil radiator 22 form the first sub-temperature control circuit; the hydraulic oil input end of the torque converter 1, the first hydraulic oil output end of the torque converter 1, the input end of the thermostat 21 and the second output end of the thermostat 21 form the second sub-temperature control circuit. Specifically, when the temperature of the hydraulic oil is lower than the second temperature, the input end of the thermostat 21 and the second output end of the thermostat 21 are automatically connected to form a second sub-temperature regulating loop to keep the hydraulic oil warm, so that the hydraulic oil can be quickly heated up as the hydraulic torque converter 1 is running; when the temperature of the hydraulic oil is higher than the second temperature, the input end of the thermostat 21 and the first output end of the thermostat 21 are automatically connected to form a first sub-temperature regulating loop, and the hydraulic oil is cooled and cooled by the hydraulic oil radiator 22. Thus, during the entire operation of the hydraulic torque converter 1, the temperature of the hydraulic oil can be automatically adjusted, so that the transmission efficiency of the hydraulic torque converter 1 can be effectively guaranteed, and the reliability of heat exchange and heating of the EGR component 3 can be guaranteed. Among them, the specific structures of the thermostat 21 and the hydraulic torque converter 1 belong to the prior art and will not be repeated here. The input shaft of the hydraulic torque converter 1 is transmission-connected to the output shaft of the engine, and the output shaft of the hydraulic torque converter 1 is transmission-connected to the input shaft of the transmission.

[0054] Specifically, in this embodiment, the first temperature is -20°C and the second temperature is 90°C. Figure 1 As shown, the working process of the temperature control system is as follows:

[0055] The ambient temperature is monitored in real time by the temperature sensor 6 .

[0056] When the ambient temperature is greater than the first temperature, the control valve 4 is controlled to disconnect the heat exchange passage between the second hydraulic oil output end of the torque converter 1 and the EGR valve 31. The thermostat 21 operates according to the second temperature. When the temperature of the hydraulic oil is less than the second temperature, the input end of the thermostat 21 is connected to the second output end of the thermostat 21 to form a second sub-temperature control loop; when the temperature of the hydraulic oil is greater than or equal to the second temperature, the input end of the thermostat 21 is connected to the first output end of the thermostat 21 to form a first sub-temperature control loop.

[0057] When the ambient temperature is less than or equal to the first temperature, the control valve 4 is controlled to connect the second hydraulic oil output end of the torque converter 1 and the heat exchange channel of the EGR valve 31 to form a heat exchange loop, and the control valve 4 is controlled to adjust the flow of hydraulic oil delivered to the heat exchange channel of the EGR component 3. The thermostat 21 operates according to the second temperature. When the temperature of the hydraulic oil is less than the second temperature, the input end of the thermostat 21 is connected to the second output end of the thermostat 21 to form a second sub-temperature adjustment loop; when the temperature of the hydraulic oil is greater than or equal to the second temperature, the input end of the thermostat 21 is connected to the first output end of the thermostat 21 to form a first sub-temperature adjustment loop.

[0058] Therefore, when the vehicle is used in a low-temperature environment, the EGR component 3 can be effectively prevented from freezing, the fuel consumption of the vehicle can be effectively reduced, the difficulty of pipeline layout can be effectively reduced, and the working performance and service life of the engine system can be effectively improved.

[0059] The utility model also provides an engine system, including the above-mentioned temperature control system. By adopting the above-mentioned temperature control system, the difficulty of pipeline layout can be effectively reduced, and the working performance and service life of the engine system can be effectively improved. Especially for a liquefied natural gas engine system, the difficulty of pipeline layout can be effectively reduced, and the working performance and service life of the engine system can be effectively improved.

[0060] The utility model also provides a vehicle, including the above-mentioned engine system. By adopting the above-mentioned engine system, the fuel consumption and production cost of the vehicle can be effectively reduced, and the working performance and service life of the vehicle can be effectively improved. In this embodiment, the above-mentioned engine system is exemplarily applied to a loader.

[0061] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Temperature control system, characterized in that: It comprises a hydraulic torque converter (1), a temperature regulating component (2) and an EGR component (3), wherein the temperature regulating component (2) is used to regulate the temperature of hydraulic oil flowing through the hydraulic torque converter (1); The hydraulic oil input end of the hydraulic torque converter (1), the first hydraulic oil output end of the hydraulic torque converter (1) and the temperature regulating component (2) form a temperature regulating circuit; The hydraulic oil input end of the hydraulic torque converter (1), the second hydraulic oil output end of the hydraulic torque converter (1) and the heat exchange channel of the EGR component (3) can form a heat exchange circuit.

2. The temperature control system according to claim 1, characterized in that: The temperature control system further comprises a control valve (4), wherein the control valve (4) is capable of regulating the flow rate of hydraulic oil delivered from the second hydraulic oil output end to the heat exchange channel of the EGR component (3).

3. The temperature control system according to claim 2, characterized in that: The control valve (4) is a flow control valve.

4. The temperature control system according to claim 1, characterized in that: The pipeline connecting the first hydraulic oil output end and the input end of the temperature regulating component (2) is the first pipeline, and the pipeline connecting the second hydraulic oil output end and the input end of the heat exchange channel of the EGR component (3) is the second pipeline; The diameter of the first pipeline is greater than the diameter of the second pipeline.

5. The temperature control system according to any one of claims 1 to 4, characterized in that: The EGR component (3) comprises an EGR valve (31), and the hydraulic oil input end of the hydraulic torque converter (1), the second hydraulic oil output end of the hydraulic torque converter (1) and the heat exchange channel of the EGR valve (31) can form the heat exchange circuit.

6. The temperature control system according to claim 5, characterized in that: The EGR component (3) further comprises a venturi tube (32) distributed downstream of the EGR valve (31), and two ends of a heat exchange channel of the venturi tube (32) are respectively connected to the heat exchange channel of the EGR valve (31) and the hydraulic oil input end of the hydraulic torque converter (1).

7. The temperature control system according to claim 5, characterized in that: The EGR component (3) further comprises a mixer (33) distributed downstream of the EGR valve (31), and two ends of a heat exchange channel of the mixer (33) are respectively connected to the heat exchange channel of the EGR valve (31) and the hydraulic oil input end of the hydraulic torque converter (1).

8. The temperature control system according to any one of claims 1 to 4, characterized in that: The temperature control component (2) comprises a thermostat (21) and a hydraulic oil radiator (22); the temperature control circuit comprises a first sub-temperature control circuit and a second sub-temperature control circuit; The hydraulic oil input end of the hydraulic torque converter (1), the first hydraulic oil output end of the hydraulic torque converter (1), the input end of the thermostat (21), the first output end of the thermostat (21) and the hydraulic oil radiator (22) form the first sub-temperature regulating circuit; The hydraulic oil input end of the hydraulic torque converter (1), the first hydraulic oil output end of the hydraulic torque converter (1), the input end of the thermostat (21) and the second output end of the thermostat (21) form the second sub-temperature control circuit.

9. An engine system, characterized in that The temperature control system comprises the temperature control system according to any one of claims 1 to 8.

10. A vehicle, characterized in that Includes the engine system as claimed in claim 9.

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