Starting control system for diesel engine

Abstract

The utility model discloses a starting control system for a diesel engine, which comprises a main starting electric motor, an auxiliary starting electric motor, a main starting contactor, an auxiliary starting contactor and a control signal input unit, and a first storage battery pack is connected between a positive terminal and a negative terminal of the main starting electric motor; a second storage battery pack is connected between the positive terminal and the negative terminal of the auxiliary starter motor; the main / auxiliary starting contactors are respectively used for controlling the starting and stopping of the main / auxiliary starting electric motor; the control signal input unit comprises two different starting loops, and the two different starting loops provide control signals for the main starting contactor and the auxiliary starting contactor respectively. A running success signal normally-closed contact is arranged in the control signal input unit, and the diesel engine is kept closed when not started and is disconnected after being started successfully. According to the starting control system for the diesel engine, emergency starting of the diesel engine can be achieved, the starting control system can serve as a standby power source, and normal operation of related equipment and systems is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine starting control, and in particular to a starting control system for diesel engines. Background Technology

[0002] As an important power unit, a diesel engine typically consists of four main systems: a starting system, a lubrication system, a fuel supply system, and a cooling system. Among these, the starting system plays a crucial role in the normal starting and stable operation of the diesel engine. The starting process of a diesel engine mainly relies on a starter motor (starter motor). Its pinion gear meshes with the flywheel ring gear under the action of electromagnetic force, driving the crankshaft to rotate, thus providing initial power. During the starting process, the flywheel not only assists in a smooth start but also stores energy, ensuring that the diesel engine smoothly enters a stable operating state. The core task of the starter motor is to provide sufficient torque to overcome the initial resistance of the diesel engine, enabling it to reach the minimum speed required for starting.

[0003] Currently, diesel engine starting designs mainly include single-motor starting and dual-motor starting methods. The former has several drawbacks in practical use: high-power starter motors are typically bulky, requiring redesigned installation structures, reducing versatility, and potentially increasing the risk of starting system failure. Furthermore, if the starter motor fails, the diesel engine cannot be started, making it unsuitable for emergency situations. The latter uses two smaller starter motors working together to provide the necessary power for starting. This design can meet the starting requirements of high-power diesel engines and improves system reliability and flexibility to some extent. However, if the moving iron core of one starter motor becomes stuck, the pinion gear of the faulty starter motor will not retract properly when the control signal is withdrawn, affecting the normal retraction of the other pinion gear. This asynchronous action can cause repeated collisions between the pinion gear and the flywheel ring gear, resulting in gear grinding, increasing maintenance costs and labor intensity, posing safety hazards, and impacting user experience.

[0004] Therefore, there is an urgent need for a starting system that can adapt to emergency situations and ensure the normal and rapid start-up of diesel engines. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention provides a starting control system for diesel engines that can adapt to emergency situations, enabling the diesel engine to start normally even when the main starter motor fails, thus ensuring the normal operation of the entire system.

[0006] The diesel engine starting control system according to the first aspect of this utility model includes:

[0007] A main starter motor, wherein a first battery pack is connected between the positive and negative terminals of the main starter motor;

[0008] An auxiliary starter motor, wherein a second battery pack is connected between the positive and negative terminals of the auxiliary starter motor;

[0009] A main starting contactor, which is used to control the starting and stopping of the main starting electric motor;

[0010] An auxiliary starting contactor is used to control the starting and stopping of an auxiliary starting electric motor.

[0011] The control signal input unit includes two different starting circuits, which respectively provide control signals to the main starting contactor and the auxiliary starting contactor.

[0012] The control signal input unit is equipped with a normally closed contact for a successful operation signal. This contact remains closed when the diesel engine is not started and opens after a successful start.

[0013] According to the diesel engine starting control system of the first aspect of this utility model, the control signal input unit includes two different starting circuits. Under normal circumstances, the diesel engine can be started by the main starter motor. When the main starter motor fails, the auxiliary starter motor can be started to realize the emergency start of the diesel engine. It can also be used as a backup power source to ensure the normal operation of related equipment and systems, and to ensure the reliability and stability of starting the diesel engine.

[0014] In some embodiments of this utility model, the main starting contactor includes a main starting contactor coil, a first contact, and a second contact. The first contact is connected to the positive terminal of the main starting motor, and the second contact is connected to the starting terminal of the main starting motor. When the main starting contactor coil is energized, the second contact engages with the first contact; when de-energized, the second contact disengages from the first contact.

[0015] In some embodiments of this utility model, the auxiliary starting contactor includes an auxiliary starting contactor coil, a third contact, and a fourth contact. The third contact is connected to the positive terminal of the auxiliary starting motor, and the fourth contact is connected to the starting terminal of the auxiliary starting motor. When the auxiliary starting contactor coil is energized, the third and fourth contacts are engaged, and when de-energized, the third and fourth contacts are disengaged.

[0016] In some embodiments of this utility model, the control signal input unit includes:

[0017] Main UPS power supply and auxiliary UPS power supply are used to provide uninterrupted power;

[0018] Main circuit breakers and auxiliary circuit breakers are used to control the short circuit, overload, leakage current and over / under voltage protection of the corresponding circuits;

[0019] A power switch is used to turn a control circuit on or off.

[0020] A rotary self-locking switch is used to switch between local and remote operation modes;

[0021] The starting control unit includes an emergency start switch, a local start switch, and a remote start switch. The emergency start switch and the local start switch are interlocked. The remote start switch is normally open and turns to normally closed during operation.

[0022] The main UPS power supply, main circuit breaker, power switch, rotary self-locking switch, start control unit, and normally closed contact for successful operation signal are connected in series with the main start contactor to form the main start circuit; the auxiliary UPS power supply, auxiliary circuit breaker, power switch, rotary self-locking switch, and start control unit are connected in series with the auxiliary start contactor to form the auxiliary start circuit.

[0023] In some embodiments of this utility model, both the emergency start switch and the machine-side start switch have normally open contacts and normally closed contacts. The normally open contact of the emergency start switch is connected in series with the normally closed contact of the machine-side start switch and is connected between the auxiliary start contactor and the auxiliary circuit breaker. The normally closed contact of the emergency start switch is connected in series with the normally open contact of the machine-side start switch and is connected between the normally closed contact of the successful operation signal and the rotary self-locking switch.

[0024] In some embodiments of this utility model, the control signal input unit has two modes: local or remote. The local or remote mode is selected by operating the rotary self-locking switch. When the local mode is selected, the local start switch is pressed to energize the coil of the main start contactor. When the remote mode is selected, the remote start switch is remotely triggered to energize the coil in the main start contactor. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a diesel engine starting control system according to an embodiment of the present invention.

[0026] Figure label:

[0027] 10. Main starter motor;

[0028] 20. Auxiliary starter motor;

[0029] 11. Starting column; 12. Drive lever; 13. Pinion gear;

[0030] 30. Diesel engine flywheel gear ring. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] The following is for reference. Figure 1 The diesel engine starting control system according to an embodiment of the present invention includes a main starter motor 10, an auxiliary starter motor 20, a main starter contactor KM1, an auxiliary starter contactor KM2, and a control signal input unit. A first battery pack K1 is connected between the positive and negative terminals of the main starter motor 10; a second battery pack K2 is connected between the positive and negative terminals of the auxiliary starter motor 20; the main starter contactor KM1 controls the starting and stopping of the main starter motor 10; the auxiliary starter contactor KM2 controls the starting and stopping of the auxiliary starter motor 20; the control signal input unit includes two different starting circuits, which respectively provide control signals to the main starter contactor KM1 and the auxiliary starter contactor KM2. The control signal input unit includes a normally closed contact KA1 for a successful start signal, which remains closed when the diesel engine is not started and opens after successful start.

[0033] For example, the main starter motor 10 and the auxiliary starter motor 20 convert the electrical energy from the first battery pack K1 and the second battery pack K2 into mechanical energy, respectively, to drive the flywheel of the diesel engine to rotate, thereby starting the diesel engine. The main starter motor 10 and the auxiliary starter motor 20 have the same structure, both including a DC motor M, a positive terminal, a negative terminal, and an electromagnetic control mechanism; the DC motor M generates torque, converting electrical energy into mechanical energy; the positive terminal and the negative terminal are the two terminals connecting the main starter motor 10 to the first battery pack K1; the electromagnetic control mechanism includes a starter post 11, a secondary excitation winding, a movable iron core, a drive lever 12, a pinion 13, contact plates, etc. The starter post 11 is the motor control circuit, used to connect or disconnect the main starter motor 10; the movable iron core is connected in series with the main starter contactor KM1 in the circuit. The contact piece is one of the components in the main starter motor 10 that is responsible for connecting the first battery pack K1. When the diesel engine start signal is input, the contact piece moves axially through the magnetism generated by the excitation winding, connecting the contact piece to the terminal of the main circuit. The first battery pack K1 provides electrical energy to start the DC motor M, thereby transmitting electrical energy and making the DC motor M run continuously to start the diesel engine.

[0034] It is understood that the control signal input unit of this utility model mainly provides control signals to the main starter contactor KM1 and the auxiliary starter contactor KM2. The main starter contactor KM1 and the auxiliary starter contactor KM2 control the starting and stopping of the main starter motor 10 and the auxiliary starter motor 20 according to the received control signals. When there is no successful start signal input for the diesel engine, the main starter contactor KM1 and the auxiliary starter contactor KM2 do not operate, i.e., they are in a stopped state. Under normal circumstances, the control signal input unit sends a start signal to the main starter contactor KM1, energizing the main starter contactor KM1, causing the main starter motor 10 to rotate, driving the flywheel of the diesel engine to rotate, thereby starting the diesel engine.

[0035] Specifically, when a starting signal is input to the main starting contactor KM1, KM1 is energized, and its starting column 11 is energized, which energizes the auxiliary excitation winding. The movable iron core moves under the magnetic force generated by the energization, and pushes the pinion 13 axially through the drive lever 12, engaging with the diesel engine flywheel ring gear 30. At the same time, the contact piece at the end of the movable iron core also moves accordingly. When the movable iron core moves to its limit position, the contact piece contacts the two terminals of the main circuit, connecting the power supply circuit from the first battery pack K1 to the DC motor M. Since the pinion 13 is engaged with the diesel engine flywheel ring gear 30, the DC motor M runs at full speed, and can drive the flywheel to rotate through the pinion 13, starting the diesel engine.

[0036] When the diesel engine starts successfully, the normally closed contact KA1 of the start-up signal activates, changing from normally closed to normally open. The main starter contactor KM1 is de-energized, and the starter column 11 of the main starter motor 10 is de-energized. At the instant the start signal is disconnected, the auxiliary excitation winding is de-energized, the magnetic field disappears, the movable iron core resets, and the drive lever 12 drives the pinion 13 to disengage from the flywheel gear ring and return to its original position, preventing any impact on the normal operation of the diesel engine. Simultaneously, the contact piece opens, cutting off the main circuit, and the DC motor M stops.

[0037] Therefore, when the main starter motor 10 malfunctions, the control signal input unit sends a start signal to the auxiliary starter contactor KM2. The auxiliary starter contactor KM2 is energized, and the auxiliary starter motor 20 rotates, driving the diesel engine flywheel to rotate, thus achieving an emergency start for the diesel engine. The working principle of the auxiliary starter contactor KM2 is the same as that of the main starter contactor KM1, and therefore will not be described further here.

[0038] According to the diesel engine starting control system of the first aspect of this utility model, the control signal input unit includes two different starting circuits. Under normal circumstances, the diesel engine can be started by the main starter motor 10. When the main starter motor 10 fails, the auxiliary starter motor 20 can be started to realize the emergency start of the diesel engine. It can also be used as a backup power source to ensure the normal operation of related equipment and systems, and to ensure the reliability and stability of starting the diesel engine.

[0039] In some embodiments of this utility model, the control signal input unit includes a main UPS power supply, an auxiliary UPS power supply, a main circuit breaker QF1, an auxiliary circuit breaker QF2, a power switch SB1, a rotary self-locking switch SB2, and a starting control unit. The main / auxiliary UPS power supply is used to provide uninterrupted power. The main circuit breaker QF1 and the auxiliary circuit breaker QF2 are used to control the short circuit, overload, leakage current, and over / under voltage protection of the corresponding circuits. The power switch SB1 is used to disconnect or connect the control circuit. The rotary self-locking switch SB2 is used to switch between local and remote operation modes. The starting control unit includes an emergency start switch SB3, a local start switch SB4, and a remote start switch SB5. The emergency start switch SB3 and the local start switch SB4 are interlocked. The remote start switch SB5 is normally open and turns to normally closed during operation. The main UPS power supply, main circuit breaker QF1, power switch SB1, rotary self-locking switch SB2, starting control unit, normally closed contact KA1 for successful operation signal, and main starting contactor KM1 are connected in series to form the main starting circuit; the auxiliary UPS power supply, auxiliary circuit breaker QF2, power switch SB1, rotary self-locking switch SB2, starting control unit, and auxiliary starting contactor KM2 are connected in series to form the auxiliary starting circuit.

[0040] For example, the main UPS power supply and the auxiliary UPS power supply are uninterruptible power supplies with built-in energy storage devices. They are mainly used to ensure the power supply of equipment. They are connected in series with the main circuit breaker QF1 and the auxiliary circuit breaker QF2 in two different circuits. They provide control signal power to the starting column 11 of the main starting motor 10 and the auxiliary starting motor 20 through the main starting contactor KM1 and the auxiliary starting contactor KM2, respectively, for controlling the starting signals of the main starting motor 10 and the auxiliary starting motor 20. The main circuit breaker QF1 and auxiliary circuit breaker QF2 are used for short-circuit, overload, leakage, and over / under voltage protection of the control circuit. The main circuit breaker QF1 is connected in series with the main UPS power supply, power switch SB1, rotary self-locking switch SB2, starting control unit, and main starting contactor KM1 in a single circuit to form the main starting circuit. The auxiliary circuit breaker QF2 is connected in series with the auxiliary UPS power supply, power switch SB1, emergency starting switch SB3, local starting switch SB4, and auxiliary starting contactor KM2 in a single circuit to form the auxiliary starting circuit. The main function of power switch SB1 is to provide safety control and operation management. The entire circuit can be switched on and off by inserting and turning the key, avoiding dangerous factors caused by human error and ensuring the safe operation of the control system. It is used to disconnect or connect the control circuit. Rotary self-locking switch SB2 is used to switch between on-site and remote operation modes. Specifically, SB2 can be used to determine the on-site or remote position, switching accordingly as needed. When rotated to the on-site position, contacts 1 and 2 of SB2 are energized; when rotated to the remote position, contacts 3 and 4 are energized, thus enabling control of the dual-motor starting system for either on-site or remote operation. Remote start switch SB5 is for transmitting remote signals and can be connected in series in the main starting circuit via terminals 1 and 2. When operating the main starter motor 10, the contacts of remote start switch SB5 change from normally open to normally closed.

[0041] Under normal circumstances, the diesel engine is started by the main starting circuit. Specifically:

[0042] Open the main UPS power supply box, press the power switch SB1, and manually operate the normally open contact of the main circuit breaker QF1 to the closed state. With the normally closed contact KA1 of the running signal not activated, current flows through the rotary self-locking switch SB2. When it is necessary to start the diesel engine at the engine location, rotate the rotary self-locking switch SB2 to the engine location position, connecting contacts 1 and 2. Manually press the engine location starter switch SB4, energizing the main starter contactor KM1. The first contact S2 and the second contact S3 engage, controlling the energization of the starter column 11 of the main starter motor 10. The movable iron core moves under the magnetic force generated by the energized electromagnetic operating mechanism, causing the movable iron core to drive the pinion 13 through the connected drive lever 12, engaging with the diesel engine flywheel ring gear 30. Simultaneously, the contact piece contacts the two terminals of the main circuit, connecting the power supply circuit from the first battery pack K1 to the DC motor M. The DC motor M runs at full speed, driving the flywheel to rotate through the pinion 13, thus starting the diesel engine. When the diesel engine starts successfully, the normally closed contact of the start-up signal actuates, changing from normally closed to normally open. The main starter contactor KM1 is de-energized, and the starter column 11 of the main starter motor 10 is de-energized. At the instant the start signal is disconnected, the auxiliary excitation winding is de-energized, the magnetic field disappears, the movable iron core resets, and the drive lever 12 drives the pinion 13 to disengage from the flywheel gear ring and return to its original position, preventing any impact on the normal operation of the diesel engine. Simultaneously, the contact piece opens, cutting off the main circuit, and the DC motor M stops.

[0043] Alternatively, the self-locking switch SB2 can be rotated to the remote control position, connecting contacts 3 and 4. Terminals 1 and 2, and the remote control self-reset switch SB4 are connected in series in the starting circuit. Pressing the remote control start switch SB5 connects the main start contactor KM1. The subsequent principle is similar to that described above and will not be repeated here.

[0044] When the main starter motor 10 fails, the diesel engine is started by the auxiliary starter circuit. Specifically:

[0045] The positive and negative terminals of the auxiliary starter motor 20 are connected in series with the second battery pack K2. Pressing the power switch SB1 manually closes the normally open contact of the auxiliary circuit breaker QF2. With the normally closed contact KA1 not activated, manually pressing the emergency start switch SB3 disables the engine-side start switch SB4. The auxiliary starter contactor KM2 is connected in series in the entire control circuit to energize the starter terminal of the auxiliary starter motor 20. The auxiliary starter motor 20 receives the start signal and, through its internal mechanical control, converts the electrical energy of the second battery pack K2 into mechanical energy, driving the drive lever to engage the pinion gear with the diesel engine flywheel ring gear, thus starting the diesel engine.

[0046] In some embodiments of this utility model, reference is made to Figure 1As shown, the emergency start switch SB3 has a normally open contact SB31 and a normally closed contact SB32, and the machine-side start switch SB4 has a normally open contact SB41 and a normally closed contact SB42. The normally open contact SB31 of the emergency start switch SB3 and the normally closed contact SB42 of the machine-side start switch SB4 are connected in series and are connected between the auxiliary start contactor QF2 and the auxiliary circuit breaker QF2. The normally closed contact SB32 of the emergency start switch SB3 and the normally open contact SB41 of the machine-side start switch SB4 are connected in series and are connected between the normally closed contact KA1 of the successful operation signal and the rotary self-locking switch SB2.

[0047] Understandably, the emergency start switch SB3 and the local start switch SB4 are interlocked, allowing only either the local start switch SB4 or the emergency start switch SB3 to operate at any given time. This prevents the main starter motor 10 or the auxiliary starter motor 20 from breaking down. When the local start switch SB4 is pressed, its normally open contact SB41 closes, connecting in series with the normally closed contact SB32 of the emergency start switch SB3 to the rotary self-locking switch SB2 and the normally closed contact KA1 of the running signal, allowing selection between local and remote control modes. If the rotary self-locking switch SB2 can be operated to select between local and remote control modes, in local mode, pressing the local start switch SB4 energizes the main starter contactor KM1; in remote control mode, remotely triggering the remote start switch SB5 energizes the main starter contactor KM1.

[0048] Correspondingly, when the emergency start switch SB3 is pressed, the normally open contact SB31 of the emergency start switch SB3 closes, and is connected in series with the normally closed contact SB42 of the engine start switch SB4 between the auxiliary start contactor KM2 and the auxiliary circuit breaker QF2. The engine start switch SB4 is disabled. By controlling the power switch SB1, the auxiliary circuit breaker QF2, etc., the diesel engine can be started by the auxiliary start motor 20.

[0049] In some embodiments of this utility model, reference is made to Figure 1 As shown, the main starter contactor KM1 includes a main starter contactor coil S1, a first contact S2, and a second contact S3. The first contact S2 is connected to the positive terminal of the main starter motor 10, and the second contact S3 is connected to the starting terminal of the main starter motor 10. When the main starter contactor coil S1 is energized, the second contact S3 and the first contact S2 are engaged; when the energizer is de-energized, the second contact S3 and the first contact S2 are disengaged.

[0050] Understandably, when the control signal input unit sends a start signal to the main starter contactor KM1, the main starter contactor coil S1 of the main starter contactor KM1 is energized, the first contact S2 and the second contact S3 are engaged, the starter column 11 of the main starter motor 10 is energized, and the diesel engine begins to start. Under normal circumstances, when the diesel engine runs successfully, the normally closed contact KA1 of the run success signal is activated, changing from normally closed to normally open. The main starter contactor KM1 will be de-energized, the first contact S2 and the second contact S3 will be disconnected, the starter column 11 of the main starter motor 10 will be de-energized, the auxiliary excitation winding will be de-energized, the magnetic field will disappear, the movable iron core will reset, and the drive lever 12 will drive the pinion 13 to disengage from the flywheel gear ring and return to its original position. Since the main starting contactor KM1 and the auxiliary starting contactor KM2 are independent of each other and do not affect each other, when the moving iron core of one of the electric motors becomes stuck, only the corresponding pinion 13 cannot return to its normal position, but it does not affect the normal use of the other electric motor.

[0051] Similarly, the auxiliary starter contactor KM2 may include an auxiliary starter contactor coil S4, a third contact S5, and a fourth contact S6. The third contact S5 is connected to the positive terminal of the auxiliary starter motor 20, and the fourth contact S6 is connected to the starting terminal of the auxiliary starter motor 20. When the auxiliary starter contactor coil S4 is energized, the third contact S5 and the fourth contact S6 are engaged. When the energizer is de-energized, the third contact S5 and the fourth contact S6 are disengaged.

[0052] Understandably, when a fault prevents the diesel engine from starting, the control signal input unit sends a starting signal to the auxiliary starter contactor KM2, energizing the auxiliary starter contactor coil S4 of KM2. The subsequent starting process is similar to the previous one and will not be described in detail here.

[0053] This system incorporates the main starter contactor and auxiliary starter contactor in two separate starting circuits. In special circumstances, such as when a diesel engine is in an emergency / berthing situation without shore power or in an emergency, the diesel engine must provide the necessary load power to ensure the safety of the vessel. If the main starter motor 10 malfunctions and cannot meet the requirements, the emergency starter switch SB3 is activated to provide emergency power to the auxiliary starter motor 20, ensuring a safe and reliable start for the diesel engine. Furthermore, the emergency starter switch SB3 and the engine-side starter switch SB4 are redundantly designed. For example, the normally open contact of the engine-side starter switch SB4 is connected in series with the normally closed contact of the emergency starter switch SB3, and vice versa. This adds an interlocking function, allowing only the emergency starter switch SB3 and the engine-side starter switch SB4 to operate at a time, preventing the main starter motor 10 or the auxiliary starter motor 20 from malfunctioning.

[0054] In summary, this utility model system serves as an emergency starting motor. To ensure reliable operation, in the event of a failure of the main starting motor 10, the auxiliary starting motor 20 can start the diesel engine, acting as a backup power source to ensure the normal operation of the ship's critical equipment and systems.

[0055] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0058] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A starting control system for a diesel engine, characterized in that, include: A main starter motor, wherein a first battery pack is connected between the positive and negative terminals of the main starter motor; An auxiliary starter motor, wherein a second battery pack is connected between the positive and negative terminals of the auxiliary starter motor; A main starting contactor, which is used to control the starting and stopping of the main starting electric motor; An auxiliary starting contactor is used to control the starting and stopping of an auxiliary starting electric motor. The control signal input unit includes two different starting circuits, which respectively provide control signals to the main starting contactor and the auxiliary starting contactor. The control signal input unit is equipped with a normally closed contact for a successful operation signal. This contact remains closed when the diesel engine is not started and opens after a successful start.

2. The starting control system for a diesel engine according to claim 1, characterized in that, The main starter contactor includes a main starter contactor coil, a first contact, and a second contact. The first contact is connected to the positive terminal of the main starter motor, and the second contact is connected to the starting terminal of the main starter motor. When the main starter contactor coil is energized, the second contact is attracted to the first contact, and when the power is off, the second contact is disconnected from the first contact.

3. The starting control system for a diesel engine according to claim 1, characterized in that, The auxiliary starter contactor includes an auxiliary starter contactor coil, a third contact, and a fourth contact. The third contact is connected to the positive terminal of the auxiliary starter motor, and the fourth contact is connected to the starting terminal of the auxiliary starter motor. When the auxiliary starter contactor coil is energized, the third and fourth contacts are engaged, and when the power is off, the third and fourth contacts are disengaged.

4. A starting control system for a diesel engine according to claim 1, characterized in that, The control signal input unit includes: Main UPS power supply and auxiliary UPS power supply are used to provide uninterrupted power; Main circuit breakers and auxiliary circuit breakers are used to control the short circuit, overload, leakage current and over / under voltage protection of the corresponding circuits; A power switch is used to turn a control circuit on or off. A rotary self-locking switch is used to switch between local and remote operation modes; The starting control unit includes an emergency start switch, a local start switch, and a remote start switch. The emergency start switch and the local start switch are interlocked. The remote start switch is normally open and turns to normally closed during operation. The main UPS power supply, main circuit breaker, power switch, rotary self-locking switch, start control unit, and normally closed contact of the successful operation signal are connected in series with the main start contactor to form the main start circuit; the auxiliary UPS power supply, auxiliary circuit breaker, power switch, rotary self-locking switch, and start control unit are connected in series with the auxiliary start contactor to form the auxiliary start circuit.

5. A starting control system for a diesel engine according to claim 4, characterized in that, Both the emergency start switch and the machine-side start switch have normally open and normally closed contacts. The normally open contact of the emergency start switch is connected in series with the normally closed contact of the machine-side start switch and is connected between the auxiliary start contactor and the auxiliary circuit breaker. The normally closed contact of the emergency start switch is connected in series with the normally open contact of the machine-side start switch and is connected between the normally closed contact of the successful operation signal and the rotary self-locking switch.

6. A starting control system for a diesel engine according to claim 4, characterized in that, The control signal input unit has two modes: local and remote. The local or remote mode is selected by operating the rotary self-locking switch. When the local mode is selected, the local start switch is pressed to energize the main start contactor coil. When the remote mode is selected, the remote start switch is remotely triggered to energize the coil in the main start contactor.

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