Engine control system

Abstract

The engine control system comprises a control module, a starting motor, an engine, a first relay, a second relay, a liquid level sensor and an engine oil sensor, wherein the liquid level sensor and the engine oil sensor are arranged in an oil tank. Signal output ends of the liquid level sensor and the engine oil sensor are respectively connected to corresponding signal input ends of the control module, one end of a coil of the first relay is grounded, the other end of the coil is connected with a first output end of the control module, and a normally open contact of the first relay is electrically connected between a second output end of the control module and a starting end of the starting motor; one end of a coil of the second relay is grounded, the other end is connected with a third output end of the control module, and a normally open contact of the second relay is connected between a second output end of the control module and the anode of the carburetor electromagnetic valve; the starting motor is in transmission connection with the engine. A fourth signal output end of the control module is connected with a primary coil of an igniter of the engine. The control circuit is simple, convenient to install and low in cost.

Description

Technical Field

[0001] The utility model relates to the field of engines, in particular to an engine control system. Background Art

[0002] For the engine, electric starting is a relatively common starting method. The starting motor is used to drive the crankshaft to rotate and transmit torque to the engine, thereby starting the engine.

[0003] In the prior art engine control system, the control circuit is too complicated and the cost is high. In addition, the emergency handling method is too circuitous and the shutdown processing time is too long, which can easily cause damage to the equipment. Utility Model Content

[0004] In order to overcome the defects in the prior art, the purpose of the utility model is to provide an engine control system.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model provides an engine control system, including a control module, a starter motor, an engine, a first relay, a second relay, a liquid level sensor arranged in a fuel tank, and an oil sensor arranged in an engine oil dipstick tube;

[0006] The signal output ends of the liquid level sensor and the oil sensor are respectively connected to the corresponding signal input ends of the control module, one end of the coil of the first relay is grounded, and the other end is connected to the first output end of the control module, and the normally open contact of the first relay is electrically connected between the second output end of the control module and the starting end of the starter motor;

[0007] One end of the coil of the second relay is grounded, and the other end is connected to the third output end of the control module, and the normally open contact of the second relay is connected between the second output end of the control module and the positive pole of the carburetor solenoid valve;

[0008] The starter motor is drivingly connected to the engine, and the fourth signal output terminal of the control module is connected to the primary coil of the engine's igniter.

[0009] In the engine control system, when the starter motor is started, the first output terminal of the control module outputs a high level, the first relay coil is energized, and its normally open contact is closed; the third output terminal of the control module outputs a high level, the second relay coil is energized, and its normally open contact is closed; the second output terminal of the control module outputs a high level, so that the starter motor is started, the carburetor solenoid valve is turned on, and the engine is started. After the engine is started, the first output terminal of the control module outputs a low level, the first relay coil loses power, its normally open contact is disconnected, and the starter motor stops running. When the engine is turned off, the fourth signal output terminal of the control module outputs a low level, so that the primary coil of the igniter is grounded, the igniter stops igniting, and the engine stops. At the same time, the third output terminal of the control module outputs a low level, the second relay coil loses power, its normally open contact is disconnected, the carburetor solenoid valve is closed, and the carburetor oil circuit is disconnected.

[0010] The control circuit of the engine control system is simple, easy to install and low-cost. During operation, the oil level in the fuel tank can be detected in real time through the liquid level sensor, and the oil level in the engine oil dipstick tube can be detected through the oil sensor, thereby realizing the monitoring of the oil level in the fuel tank and the oil level.

[0011] Optionally, the liquid level sensor is a float variable resistor liquid level sensor, whose float is connected to the corresponding signal input terminal of the control module. The float variable resistor liquid level sensor has low cost, is easy to install, and is particularly suitable for detecting oil volume.

[0012] Optionally, the bottom of the engine oil dipstick tube is grounded, the oil sensor is a second float, and the second float is connected to the corresponding signal input terminal of the control module. This optional solution has a simple structure, is easy to install, and has low cost.

[0013] Optionally, a first emergency stop switch is further included, wherein the first emergency stop switch is a normally open switch and is electrically connected between a signal input terminal and an output terminal of the control module. This optional solution can quickly realize emergency stop control of the engine.

[0014] Optionally, a second emergency stop switch is further included, wherein the second emergency stop switch is a normally open switch and is electrically connected between a signal output terminal and a signal input terminal of the control module. This optional solution can quickly realize emergency stop control of the engine.

[0015] Optionally, it also includes a charging module and a battery, the charging module includes a bridge voltage regulator module and a charging coil, the power supply end of the bridge voltage regulator module is connected to a power switch, the AC end thereof is electrically connected to the charging coil, and the power switch is also connected to the battery charging end.

[0016] Optionally, the AC end of the bridge voltage regulator module is also connected to the sampling voltage signal input end of the control module. The sampling of the voltage signal in this optional solution can be used to detect the rotation speed of the coil.

[0017] Optionally, a water pump is further included, the engine is connected to the water pump control, a water outlet pressure sensor is provided at the water outlet of the water pump, and the signal output end of the water outlet pressure sensor is connected to the corresponding signal input end of the control module. This optional solution is particularly suitable for engine control of a water pump.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a control principle diagram of the utility model. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0023] like Figure 1 As shown, the utility model provides an engine control system, which includes a control module, a starter motor, an engine (not shown), a first relay, a second relay, a liquid level sensor arranged in a fuel tank, and an oil sensor arranged in an engine oil dipstick tube.

[0024] The signal output ends of the liquid level sensor and the oil sensor are respectively connected to the corresponding signal input ends of the control module. One end of the coil of the first relay is grounded, and in this embodiment is directly connected to the ground terminal 1 of the control module, and the other end is connected to the first output terminal 4 of the control module. The normally open contact of the first relay is electrically connected between the second output terminal 3 of the control module and the starting end of the starter motor; one end of the coil of the second relay is grounded, and the other end is connected to the third output terminal 5 of the control module. The normally open contact of the second relay is connected between the second output terminal 3 of the control module and the positive pole of the carburetor solenoid valve; the starter motor is drivingly connected to the engine.

[0025] The control module is powered by the power switch and the starter motor is started by the start switch. At this time, the first output terminal 4 of the control module outputs a high level, the first relay coil is energized, and its normally open contact is closed; the third output terminal 5 of the control module outputs a high level, the second relay coil is energized, and its normally open contact is closed; the second output terminal 3 of the control module outputs a high level, the electromagnet is attracted, the starter motor is started, thereby starting the engine, and synchronously connecting the carburetor solenoid valve.

[0026] After the engine is started, the first output terminal 4 of the control module outputs a low level, the first relay coil loses power, its normally open contact is disconnected, and the starter motor stops running.

[0027] The fourth signal output terminal 11 of the control module is connected to the primary coil of the engine's igniter. When starting the engine, the fourth signal output terminal 11 of the control module outputs a high level, and the igniter works. When shutting down the engine, the fourth signal output terminal 11 of the control module outputs a low level, so that the primary coil of the igniter is grounded, the igniter stops igniting, and the engine stops. At the same time, the third output terminal 5 of the control module outputs a low level, the second relay coil loses power, its normally open contact is disconnected, the carburetor solenoid valve is closed, and the carburetor oil circuit is disconnected.

[0028] The liquid level sensor is used to detect the amount of oil in the fuel tank and send it to the control module. When it is detected that the amount of oil in the fuel tank is less than the set oil level threshold, the control module controls the display screen to display an oil level warning message, and the control module controls the engine to stop according to the above steps.

[0029] In this embodiment, the liquid level sensor is preferably, but not limited to, a float variable resistor type liquid level sensor, which is composed of a float, a built-in sliding resistor, and a float arm connecting the two, and the float is connected to the corresponding signal input terminals 35 and 37 of the control module. The float moves up and down with the liquid level, and the sliding arm slides on the resistor, thereby changing the resistance value between the ground and the float, and the change in resistance value is used to detect the amount of gasoline in the tank.

[0030] The oil sensor is used to detect the amount of oil in the engine oil dipstick tube and send it to the control module. When it is detected that the oil amount is less than the set oil amount threshold, the control module controls the display screen to display the oil amount warning message, and the control module controls the engine to stop according to the above steps.

[0031] In this embodiment, the oil sensor is preferably but not limited to a second float, the bottom of the engine oil dipstick tube is grounded, and the second float is connected to the corresponding signal input terminal 20 of the control module. When the oil is exhausted or nearly exhausted, the second float is grounded, and the corresponding signal input terminal of the control module receives the grounding signal.

[0032] In the actual operation process, an emergency situation may occur and an emergency stop is required. To solve this problem, the present embodiment further provides a first emergency stop switch and a second emergency stop switch.

[0033] The first emergency stop switch is a normally open switch, which is electrically connected between a signal input terminal 2 and a second output terminal 3 of the control module. When an emergency occurs, the second emergency stop switch is manually disconnected, and the signal input terminal 2 of the control module does not receive a signal, and the control module controls the engine to stop according to the above method steps.

[0034] The second emergency stop switch is a normally open switch, which is electrically connected between the signal input / output terminal 19 and the signal input / output terminal 26 of the control module. When an emergency occurs, the second emergency stop switch is manually closed, and the signal input / output terminal 19 and the signal input / output terminal 26 of the control module are connected, and the control module controls the engine to stop according to the above method steps.

[0035] In this embodiment, the engine control system may also include a charging module and a battery. The charging module includes a bridge voltage regulator module and a charging coil. The power supply end of the bridge voltage regulator module is connected to a power switch, and the AC end thereof is electrically connected to the charging coil. The power switch is also connected to the battery charging end. After the power switch is turned on, the battery is powered on and voltage stabilization and rectification are performed through the bridge voltage regulator module. The AC end of the bridge voltage regulator module is also connected to the sampling voltage signal input end of the control module, that is, another signal output / input end 29 and another signal output / input end 28 of the control module in this embodiment. The sampling of the voltage signal can be used to detect the speed of the charging coil.

[0036] The engine control system can be used to control the water pump engine. At this time, the engine is connected to the water pump control. A water outlet pressure sensor is provided at the water outlet of the water pump. The signal output end of the water outlet pressure sensor is connected to the corresponding signal input end of the control module. The water outlet pressure sensor is used to detect the water outlet pressure of the water pump. When the water outlet pressure is less than the set pressure threshold, the control module controls the display screen to display the water pressure warning information and controls the engine to stop according to the above steps.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An engine control system, characterized in that: It includes a control module, a starter motor, an engine, a first relay, a second relay, a liquid level sensor arranged in the fuel tank, and an oil sensor arranged in the oil dipstick tube of the engine; The signal output ends of the liquid level sensor and the oil sensor are respectively connected to the corresponding signal input ends of the control module, one end of the coil of the first relay is grounded, and the other end is connected to the first output end of the control module, and the normally open contact of the first relay is electrically connected between the second output end of the control module and the starting end of the starter motor; One end of the coil of the second relay is grounded, and the other end is connected to the third output end of the control module, and the normally open contact of the second relay is connected between the second output end of the control module and the positive pole of the carburetor solenoid valve; The starter motor is drivingly connected to the engine, and the fourth signal output terminal of the control module is connected to the primary coil of the engine's igniter.

2. The engine control system according to claim 1, characterized in that: The liquid level sensor is a float variable resistor type liquid level sensor, and its float is connected to the signal input terminal corresponding to the control module.

3. The engine control system according to claim 1, characterized in that: The bottom of the engine oil dipstick tube is grounded, the oil sensor is a second float, and the second float is connected to the corresponding signal input terminal of the control module.

4. The engine control system according to claim 1, characterized in that: It also includes a first emergency stop switch, which is a normally open switch and is electrically connected between a signal input terminal and an output terminal of the control module.

5. The engine control system according to claim 1, characterized in that: It also includes a second emergency stop switch, which is a normally open switch and is electrically connected between a signal output terminal and a signal input terminal of the control module.

6. The engine control system according to claim 1, characterized in that: It also includes a charging module and a battery. The charging module includes a bridge voltage regulator module and a charging coil. The power supply end of the bridge voltage regulator module is connected to a power switch, and the AC end thereof is electrically connected to the charging coil. The power switch is also connected to the charging end of the battery.

7. The engine control system according to claim 6, characterized in that: The AC end of the bridge voltage regulator module is also connected to the sampling voltage signal input end of the control module.

8. The engine control system according to claim 1, characterized in that: It also includes a water pump, the engine is connected to the water pump control, a water outlet pressure sensor is provided at the water outlet of the water pump, and the signal output end of the water outlet pressure sensor is connected to the corresponding signal input end of the control module.

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