Automatic control system and method for electric control thermostat of motorcycle engine

Abstract

The invention discloses an automatic control system for an electric control thermostat of a motorcycle engine, which comprises a control unit for controlling a thermostat actuating mechanism to rotate; the system further comprises a storage unit, a thermostat basic opening meter and a target temperature meter are preset, the thermostat basic opening meter comprises the corresponding starting rotating speed of the engine, the cooling liquid temperature and the thermostat basic opening value, and the target temperature meter comprises the running rotating speed of the engine and the cooling liquid target temperature. The collecting unit obtains the temperature of the cooling liquid and the starting rotating speed and the running rotating speed of the engine; the control unit is used for matching a corresponding thermostat basic opening degree value from a thermostat basic opening degree table according to the obtained starting rotating speed and the cooling liquid temperature, and controlling a thermostat executing mechanism to rotate to reach the thermostat basic opening degree; and the control unit is used for matching the corresponding cooling liquid target temperature from the target thermometer according to the obtained operation rotating speed, and controlling the thermostat executing mechanism to rotate until the cooling liquid temperature reaches the cooling liquid target temperature.

Description

Technical Field

[0001] The invention relates to an automatic control system for an electronically controlled thermostat, and in particular to an automatic control system and method for an electronically controlled thermostat for a motorcycle engine. Background Art

[0002] A motorcycle engine is a machine that ignites the fuel mixture entering the cylinder and converts the heat energy generated by its combustion into mechanical energy, and the crankshaft transmits the power to the rear wheel of the motorcycle through the transmission mechanism to convert it into the driving power of the vehicle. At present, there are more and more large-displacement and high-performance motorcycle engines on the market. For such engines with high heat load and high compression ratio, most of their cooling methods still use a single water cooling method, and no forced cooling measures are taken for the engine oil, resulting in high oil temperature and reduced oil lubrication effect. The thermostat, as an automatic temperature regulating device, is a valve that controls the flow path of the coolant. The thermostat usually contains a temperature sensing component, which opens and closes the flow of air, gas or liquid by thermal expansion or contraction. At present, the mainstream motorcycle coolant thermostat is mechanically controlled, with poor overall consistency, and there are faults such as aging and jamming, which poses a safety hazard in long-term driving.

[0003] Chinese patent document CN2328802Y discloses a motorcycle engine using a thermostat, which is to add two heat sinks that match the outer wall of the cylinder outside the engine cylinder, the area of ​​the heat sink fins on the heat sink is appropriately increased, and cantilevers are added on both sides of the cylinder. The heat sink is sleeved on the cantilever, and the outer end sleeved on the cantilever is fixed to the tail end of the cantilever by bolts, and the spring at the inner end is clamped with the heat sink by a clamp ring. The thermostat controls the clutch with the cylinder. The thermostat is composed of a spring with good thermal expansion and contraction performance and a limit sleeve that limits the heat sink from separating too much, and adjusts the engine operating temperature within the range of 85-100°C. Its fuel saving, wear resistance, and power stability are better than those of existing motorcycle engines. The prior art has the following shortcomings: in the prior art, although the temperature adjustment of the engine is achieved by using the thermostat, the coolant thermostat in the prior art is mechanically controlled, the overall consistency is poor, and there are aging and stagnation faults, which poses a safety hazard in long-term driving. Summary of the invention

[0004] In order to solve the problem that the engine thermostat in the prior art adopts a mechanical control method, resulting in poor overall consistency, the present invention provides an automatic control system for an electronically controlled thermostat of a motorcycle engine, comprising a control unit, which controls the rotation of a thermostat actuator; It also includes a storage unit, which is preset with a basic thermostat opening table and a target temperature table, the basic thermostat opening table includes the corresponding engine starting speed, coolant temperature and thermostat basic opening value, and the target temperature table includes the engine running speed and coolant target temperature; A collection unit, used to obtain the coolant temperature and the starting speed and running speed of the engine; When the engine is started, the control unit matches the corresponding basic thermostat opening value from the basic thermostat opening table according to the acquired starting speed and coolant temperature, and controls the thermostat actuator to rotate to reach the basic thermostat opening; During engine operation, the control unit matches the corresponding coolant target temperature from the target temperature table according to the acquired operating speed. When the current coolant temperature is not equal to the matched coolant target temperature, the control unit also controls the thermostat actuator to rotate until the coolant temperature reaches the coolant target temperature.

[0005] Compared with the prior art, in this solution, the upgrade from mechanical control of the coolant to automatic control is achieved through the cooperation of the acquisition unit and the control unit, so that the coolant temperature can be dynamically adjusted to improve the overall consistency.

[0006] Preferably, during the operation of the engine, when the coolant temperature is higher than the coolant target temperature, the control unit controls the thermostat opening to increase, and when the coolant temperature is lower than the coolant target temperature, the control unit controls the thermostat opening to decrease. In this solution, the coolant flow is adjusted by adjusting the size of the thermostat opening, thereby achieving the adjustment of the coolant temperature, and the operation is simple.

[0007] Preferably, a fan is also included, and the storage unit is also preset with a start-up temperature and a stop-down temperature of the fan. When the coolant temperature is higher than the start-up temperature, the control unit controls the fan to start, and when the coolant temperature is lower than the stop-down temperature, the control unit controls the fan to stop running. In this solution, the fan is also used for forced heat dissipation, thereby increasing the heat dissipation effect and simplifying the operation.

[0008] Preferably, the thermostat actuator is provided with a return unit, and when the thermostat actuator fails, the return unit drives the thermostat to the maximum opening. In this solution, when the thermostat actuator fails, the thermostat is also driven to open to the maximum opening to ensure normal circulation of the engine coolant.

[0009] Preferably, the thermostat actuator is located on the cylinder head or cooling circulation pipe of the engine. In this solution, the method of installing the thermostat actuator on the cylinder head or cooling circulation pipe of the engine can make full use of the surrounding space and existing structure of the motorcycle engine, avoid major changes to the motorcycle, and save installation costs.

[0010] In a second aspect, the present invention provides a method for automatically controlling an electronically controlled thermostat of a motorcycle engine, using any of the above-mentioned electronically controlled thermostat automatic control systems for a motorcycle engine, comprising the following steps: Collection steps: collect coolant temperature and engine starting speed and running speed; Control step: when the engine is started, a corresponding basic thermostat opening value is matched from a basic thermostat opening table according to the acquired starting speed and coolant temperature, and the thermostat actuator is controlled to rotate to reach the basic thermostat opening; During engine operation, the corresponding coolant target temperature is matched from the target temperature table according to the acquired operating speed. When the current coolant temperature is not equal to the matched coolant target temperature, the thermostat flow is controlled until the coolant temperature reaches the coolant target temperature.

[0011] Preferably, in the control step, when a thermostat actuator fails, the thermostat is controlled to reach a maximum opening.

[0012] Preferably, in the control step, when the coolant temperature is higher than the start-up temperature, the fan is controlled to start, and when the coolant temperature is lower than the stop temperature, the fan is controlled to stop running.

[0013] The present invention has the following beneficial effects: the present invention fully utilizes the space and existing structure around the motorcycle and the engine, and realizes the upgrade from mechanical control of the coolant to automatic control without making major changes to the entire vehicle, thereby being able to dynamically adjust the coolant temperature and improve overall consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a schematic diagram of an embodiment of an automatic control system for an electronically controlled thermostat of a motorcycle engine. DETAILED DESCRIPTION

[0015] The following is further described in detail through specific implementation methods: 1. Definition Actuator: includes the throttle shaft and the actuator motor. The rotation of the actuator motor drives the throttle shaft to rotate, thereby changing the throttle opening.

[0016] 2. The embodiment is basically as shown in the attached Figure 1 Shown: An automatic control system for an electronically controlled thermostat of a motorcycle engine, comprising a thermostat actuator, which is located on the cylinder head or cooling circulation pipe of the engine; A control unit controls the rotation of the thermostat actuator; It also includes a storage unit, which is preset with a thermostat basic opening table and a target temperature table as well as a fan start temperature and a stop temperature. The thermostat basic opening table is shown in Table 1, including the corresponding engine starting speed, coolant temperature and thermostat basic opening value. The target temperature table is shown in Table 2, including the engine running speed and coolant target temperature. In this embodiment, the fan start temperature is set to 95°C and the stop temperature is set to 85°C.

[0017] Table 1 Note: The X-axis is the engine speed, unit: r / min; the Y-axis is the coolant temperature, unit: °C. The Z-axis is the basic opening value of the thermostat, unit: %.

[0018] Table 2 2000 3000 4000 5000 6000 7000 8000 95 95 90 90 90 90 90 Note: The X-axis is the engine speed, unit: r / min; the Y-axis is the coolant target temperature, unit: °C.

[0019] A collection unit is used to obtain the coolant temperature and the starting speed and running speed of the engine; specifically, the collection unit includes a temperature sensor and an angle sensor; When the engine is started, the control unit matches the corresponding basic thermostat opening value from the basic thermostat opening table according to the acquired starting speed and coolant temperature, and controls the thermostat actuator to rotate to reach the basic thermostat opening; During engine operation, the control unit matches the corresponding coolant target temperature from the target temperature table according to the acquired operating speed. When the current coolant temperature is not equal to the matched coolant target temperature, the control unit also controls the thermostat actuator to rotate until the coolant temperature reaches the coolant target temperature. Specifically, during engine operation, when the coolant temperature is higher than the coolant target temperature, the control unit controls the thermostat opening to increase, and when the coolant temperature is lower than the coolant target temperature, the control unit controls the thermostat opening to decrease.

[0020] The thermostat actuator is provided with a return unit, and when the thermostat actuator fails, the return unit drives the thermostat to the maximum opening. In this embodiment, the return unit is a return torsion spring installed on the thermostat actuator.

[0021] This embodiment also discloses a method for automatically controlling an electronically controlled thermostat of a motorcycle engine, comprising the following steps: Collection steps: collect coolant temperature and engine starting speed; Control step: when the engine is started, a corresponding basic thermostat opening value is matched from a basic thermostat opening table according to the acquired starting speed and coolant temperature, and the thermostat actuator is controlled to rotate to reach the basic thermostat opening; During engine operation, the corresponding coolant target temperature is matched from the target temperature table according to the acquired operating speed. When the current coolant temperature is not equal to the matched coolant target temperature, the thermostat flow is controlled until the coolant temperature reaches the coolant target temperature. Specifically, when the coolant temperature is higher than the opening temperature, the fan is controlled to start, and when the coolant temperature is lower than the stop temperature, the fan is controlled to stop running; when the thermostat actuator fails, the thermostat is controlled to reach the maximum opening.

[0022] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An automatic control system for an electronically controlled thermostat of a motorcycle engine, comprising a control unit for controlling the rotation of a thermostat actuator; Features: It also includes a storage unit, which is preset with a basic thermostat opening table and a target temperature table, wherein the basic thermostat opening table includes the corresponding engine starting speed, coolant temperature and basic thermostat opening value, and the target temperature table includes the engine running speed and coolant target temperature; A collection unit, used to obtain the coolant temperature and the starting speed and running speed of the engine; When the engine is started, the control unit matches the corresponding basic thermostat opening value from the basic thermostat opening table according to the acquired starting speed and coolant temperature, and controls the thermostat actuator to rotate to reach the basic thermostat opening; During engine operation, the control unit matches the corresponding coolant target temperature from the target temperature table according to the acquired operating speed. When the current coolant temperature is not equal to the matched coolant target temperature, the control unit also controls the thermostat actuator to rotate until the coolant temperature reaches the coolant target temperature.

2. The motorcycle engine electronically controlled thermostat automatic control system according to claim 1, characterized in that: During the operation of the engine, when the coolant temperature is higher than the coolant target temperature, the control unit controls the thermostat opening to increase, and when the coolant temperature is lower than the coolant target temperature, the control unit controls the thermostat opening to decrease.

3. The motorcycle engine electronically controlled thermostat automatic control system according to claim 2, characterized in that: It also includes a fan, and the storage unit is also preset with a start-up temperature and a stop temperature of the fan. When the coolant temperature is higher than the start-up temperature, the control unit controls the fan to start, and when the coolant temperature is lower than the stop temperature, the control unit controls the fan to stop running.

4. The motorcycle engine electronically controlled thermostat automatic control system according to any one of claims 1 to 3, characterized in that: The thermostat actuator is provided with a return unit, and when the thermostat actuator fails, the return unit drives the thermostat to a maximum opening.

5. The motorcycle engine electronically controlled thermostat automatic control system according to claim 4, characterized in that: The thermostat actuator is located on the cylinder head or cooling circulation pipe of the engine.

6. A method for automatically controlling an electronically controlled thermostat of a motorcycle engine, using the electronically controlled thermostat automatic control system of a motorcycle engine as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: Collection steps: collect coolant temperature and engine starting speed and running speed; Control step: when the engine is started, a corresponding basic thermostat opening value is matched from the basic thermostat opening table according to the acquired starting speed and coolant temperature, and the thermostat actuator is controlled to rotate to reach the basic thermostat opening; During engine operation, a corresponding coolant target temperature is matched from the target temperature table according to the acquired operating speed, and when the current coolant temperature is not equal to the matched coolant target temperature, the thermostat flow is controlled until the coolant temperature reaches the coolant target temperature.

7. The method for automatically controlling the electronically controlled thermostat of a motorcycle engine according to claim 6, characterized in that: In the control step, when a thermostat actuator fails, the thermostat is controlled to reach a maximum opening.

8. The method for automatically controlling the electronically controlled thermostat of a motorcycle engine according to claim 7, characterized in that: In the control step, when the coolant temperature is higher than the start-up temperature, the fan is controlled to start, and when the coolant temperature is lower than the stop temperature, the fan is controlled to stop running.

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