Dual-power supply system and method for electronic control engine

Abstract

The invention discloses a dual-power supply method for an electronic control engine, which relates to an engine and is characterized in that a standby power supply is additionally arranged on the basis of a storage battery power supply of the electronic control engine; and when the power supply of the storage battery power supply does not meet the requirement of the electric control engine, the standby power supply is switched to supply power to the electric control engine, and meanwhile residual power elimination processing is conducted on the joint of the storage battery power supply and the electric control engine. The invention further discloses a dual-power supply system for the electronic control engine. According to the invention, the standby power supply can be automatically switched under the condition that the main power supply fails, so that the stable operation of the electric control engine is ensured. The design can improve the reliability of the system and avoid engine shutdown caused by power failure.

Description

Technical Field

[0001] The present invention relates to an engine, and more particularly to a dual power supply system and method for an electronically controlled engine. Background Art

[0002] Electronically controlled engines are widely used in the fields of ships, engineering machinery, power generation equipment, etc., and their starting and operation depend on power supply. Traditionally, the power supply system of electronically controlled electronically controlled engines is usually powered by a single battery pack. However, in extreme working environments, batteries are prone to aging, damage and other failures. A single power supply may not be able to meet the starting and operation requirements of electronically controlled electronically controlled engines. Especially in critical emergency situations, power outages can cause electronically controlled engines to fail to start or shut down, causing potential safety hazards. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a dual power supply system and method for an electronically controlled engine in view of the deficiencies in the prior art, which can improve the reliability of the system and avoid engine shutdown due to power failure.

[0004] The dual power supply method for an electronically controlled engine described in the present invention adds a backup power supply on the basis of the battery power supply of the electronically controlled engine; when the power supply of the battery power supply does not meet the demand of the electronically controlled engine, the backup power supply is switched to power the electronically controlled engine, and at the same time, residual power is eliminated at the connection between the battery power supply and the electronically controlled engine.

[0005] Preferably, the backup power supply adopts 220VAC power supply.

[0006] Preferably, the battery of the battery-powered power supply and the 220VAC input end of the backup power supply are both provided with a linkage switch, and the switching states of the two linkage switches are opposite.

[0007] Preferably, the residual power elimination process is specifically as follows: when switching from the battery power supply to the backup power supply, the connection between the battery power supply and the electronically controlled engine is grounded so that the connection between the battery power supply and the electronically controlled engine is pulled down to zero potential.

[0008] Preferably, the instantaneous voltage when the connection between the battery power supply and the electronically controlled engine is grounded is monitored, and the fault type of the battery power supply is determined based on the instantaneous voltage; when the instantaneous voltage is less than a set voltage threshold, it is determined to be a fault of insufficient power supply of the battery power supply; when the instantaneous voltage is a zero voltage threshold, it is determined to be a fault of damage to the battery power supply without output.

[0009] A power supply system for implementing the dual power supply method of an electronically controlled engine, comprising a battery power supply, a backup power supply, and a power switching module; the output ends of the battery power supply and the backup power supply are simultaneously connected to the input end of the power switching module, and the output end of the power switching module is connected to the electrical input end of the electronically controlled engine.

[0010] Preferably, the battery power supply includes a battery, a second power switch, a DC-DC power isolation module and a second linkage switch; the output end of the battery is connected to the input end of the DC-DC power isolation module through the second power switch, the output end of the DC-DC power isolation module is connected to an input end of the power switching module, and the two ends of the second linkage switch are respectively connected to the output end and the ground end of the DC-DC power isolation module in a one-to-one correspondence.

[0011] Preferably, the backup power supply includes a 220VAC input end, a power switch 1, an AC-DC power isolation module and a first linkage switch; the 220VAC input end is connected to the input end of the AC-DC power isolation module through the power switch 1, the output end of the AC-DC power isolation module is connected to the other input end of the power switching module, and the two ends of the first linkage switch are respectively connected to the output end and the ground end of the AC-DC power isolation module in a one-to-one correspondence.

[0012] Preferably, the power switching module is provided with two control terminals respectively connected to the power switch 1 and the power switch 2 in a one-to-one correspondence, and the switching states of the power switch 1 and the power switch 2 are opposite.

[0013] Preferably, a second indicator light is provided between the output terminal and the ground terminal of the DC-DC power isolation module, and a first indicator light is provided between the output terminal and the ground terminal of the AC-DC power isolation module.

[0014] Beneficial Effects

[0015] The advantages of the present invention are:

[0016] 1. The present invention is based on a dual power supply structure, which can ensure that in the event of a main power failure, it automatically switches to the backup power supply, thereby ensuring the stable operation of the electronically controlled engine. This design can improve the reliability of the system and avoid engine shutdown due to power failure.

[0017] 2. The present invention adopts an isolation protection mechanism of a power isolation module and a linkage switch to protect the power switching process, ensure electrical isolation and electrical safety, and avoid damage to the electronically controlled engine caused by electrical shocks generated during the power conversion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the modular structure of the power supply system of the present invention;

[0019] Figure 2 It is a circuit schematic diagram of the power supply system of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0021] See also Figure 1 , a dual power supply method for an electronically controlled engine of the present invention adds a backup power supply on the basis of the battery power supply of the electronically controlled engine; when the power supply of the battery power supply does not meet the demand of the electronically controlled engine, the backup power supply is switched to supply power to the electronically controlled engine. The present invention is based on a dual power supply structure, which can ensure automatic switching to the backup power supply in the event of a main power failure, thereby ensuring the stable operation of the electronically controlled engine. This design can improve the reliability of the system and avoid engine shutdown due to power failure. While switching, the connection between the battery power supply and the electronically controlled engine is also subjected to residual power elimination processing. This processing can quickly pull the connection between the battery power supply and the electronically controlled engine down to zero potential, achieve fast and reliable switching, and avoid the influence of residual power in the battery power supply on the power switching module U3.

[0022] Regarding the dual power supply structure of the present invention, the backup power supply adopts 220VAC power supply. The battery of the battery power supply and the 220VAC input end of the backup power supply are both provided with linkage switches, and the switch states of the two linkage switches are opposite. In this way, the reliability of switching power supply can be ensured, and the influence of crosstalk between the two power supplies is eliminated.

[0023] Regarding the residual power elimination process, the specific processing method is: when switching from the battery power supply to the backup power supply, the connection between the battery power supply and the electronic control engine is grounded, so that the connection between the battery power supply and the electronic control engine is pulled down to zero potential, thereby eliminating the residual power in the battery power supply. Correspondingly, when the power supply is switched back from the backup power supply to the battery power supply, the same method is used to eliminate the residual power of the backup power supply.

[0024] During the residual power elimination process, the fault can be preliminarily judged based on the amount of residual current. Specifically, the instantaneous voltage when the connection between the battery power supply and the electronic control engine is grounded is monitored, and the type of fault of the battery power supply is judged based on the instantaneous voltage. When the instantaneous voltage is less than the set voltage threshold, it is judged as insufficient power supply of the battery power supply; when the instantaneous voltage is the zero voltage threshold, it is judged as a battery power supply damage without output fault. Such a design can facilitate subsequent maintenance.

[0025] See also Figure 1-Figure 2 A power supply system for realizing the dual power supply method of the electronically controlled engine, comprising a battery power supply, a backup power supply, and a power switching module U3; the output ends of the battery power supply and the backup power supply are simultaneously connected to the input end of the power switching module U3, and the output end of the power switching module U3 is connected to the electrical input end of the electronically controlled engine, thereby realizing a dual power supply structure, improving the reliability of the system, and avoiding engine shutdown due to power failure.

[0026] The battery power supply includes a battery, a second power switch Q2, a DC-DC power isolation module U2 and a second linkage switch K2. The output end of the battery is connected to the input end of the DC-DC power isolation module U2 through the second power switch Q2, the output end of the DC-DC power isolation module U2 is connected to an input end of the power switching module U3, the two ends of the second linkage switch K2 are respectively connected to the output end and the ground end of the DC-DC power isolation module U2 in a one-to-one correspondence, and a second resistor R2 is connected between the second linkage switch K2 and the reference ground.

[0027] The backup power supply includes a 220VAC input terminal, a power switch Q1, an AC-DC power isolation module U1 and a first linkage switch K1. The 220VAC input terminal is connected to the input terminal of the AC-DC power isolation module U1 through the power switch Q1, the output terminal of the AC-DC power isolation module U1 is connected to the other input terminal of the power switching module U3, the two ends of the first linkage switch K1 are respectively connected to the output terminal and the ground terminal of the AC-DC power isolation module U1 in a one-to-one correspondence, and a resistor R1 is connected between the first linkage switch K1 and the reference ground.

[0028] Since the starting current required by the electronically controlled engine is relatively large, the output stage of the power isolation module often uses large capacitors. After the power supply is switched, these capacitors are in a relatively high current. Therefore, the present invention sets linkage switches in both power supplies. The switching states of these linkage switches are opposite to the switching states of the corresponding power switches. For example, when the power switch Q1 is disconnected, the first linkage switch K1 is closed. In this way, reliable short-circuit discharge can be ensured, thereby realizing the discharge of residual electricity. The design of the resistor can realize the monitoring of the residual current, thereby realizing the pre-judgment of the fault.

[0029] In the present invention, the power switching module U3 is provided with two control terminals connected to the power switch Q1 and the power switch Q2 in one-to-one correspondence, and the switching states of the power switch Q1 and the power switch Q2 are opposite. The power switch is linked with the switching of the power supply to achieve reliable switching, and prevent the problem that the two power supplies supply power to the electronically controlled engine at the same time due to unsuccessful switching.

[0030] Preferably, a second indicator light HL2 is provided between the output end and the ground end of the DC-DC power isolation module U2, and a first indicator light HL1 is provided between the output end and the ground end of the AC-DC power isolation module U1, so that the staff can intuitively see the current use status of the power supply. In addition, a first linkage alarm switch K1-1 and a second linkage alarm switch K2-1 are provided in the system circuit of the present invention, wherein the first linkage alarm switch K1-1 is triggered synchronously with the first linkage switch, and the second linkage alarm switch K2-1 is triggered synchronously with the second linkage switch, and both linkage alarm switches are connected to the control to realize the alarm of power switching.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A dual power supply method for an electronically controlled engine, characterized in that: A backup power supply is added on the basis of the battery power supply of the electronically controlled engine; when the power supply of the battery power supply does not meet the demand of the electronically controlled engine, the backup power supply is switched to power the electronically controlled engine, and at the same time, the residual power is eliminated at the connection between the battery power supply and the electronically controlled engine.

2. A dual power supply method for an electronically controlled engine according to claim 1, characterized in that: The backup power supply adopts 220VAC power supply.

3. A dual power supply method for an electronically controlled engine according to claim 2, characterized in that: The battery of the battery-powered power supply and the 220VAC input end of the backup power supply are both provided with a linkage switch, and the switching states of the two linkage switches are opposite.

4. A dual power supply method for an electronically controlled engine according to claim 1, characterized in that: The residual power elimination process is specifically as follows: when switching from the battery power supply to the backup power supply, the connection between the battery power supply and the electronically controlled engine is grounded so that the connection between the battery power supply and the electronically controlled engine is pulled down to zero potential.

5. A dual power supply method for an electronically controlled engine according to claim 4, characterized in that: Monitor the instantaneous voltage when the connection between the battery power supply and the electronically controlled engine is grounded, and determine the fault type of the battery power supply according to the instantaneous voltage; when the instantaneous voltage is less than a set voltage threshold, determine that the battery power supply is insufficiently powered; when the instantaneous voltage is a zero voltage threshold, determine that the battery power supply is damaged and has no output fault.

6. A power supply system for implementing the dual power supply method for an electronically controlled engine as claimed in any one of claims 1 to 5, characterized in that: It comprises a battery power supply, a backup power supply and a power switching module (U3); the output ends of the battery power supply and the backup power supply are simultaneously connected to the input end of the power switching module (U3), and the output end of the power switching module (U3) is connected to the electrical input end of the electronically controlled engine.

7. A power supply system according to claim 6, characterized in that: The battery power supply comprises a battery, a second power switch (Q2), a DC-DC power isolation module (U2) and a second linkage switch (K2); the output end of the battery is connected to the input end of the DC-DC power isolation module (U2) through the second power switch (Q2), the output end of the DC-DC power isolation module (U2) is connected to an input end of a power switching module (U3), the two ends of the second linkage switch (K2) are respectively connected to the output end and the ground end of the DC-DC power isolation module (U2) in a one-to-one correspondence, and a second resistor (R2) is connected between the second linkage switch (K2) and the reference ground.

8. A power supply system according to claim 7, characterized in that: The backup power supply comprises a 220VAC input end, a power switch 1 (Q1), an AC-DC power isolation module (U1) and a first linkage switch (K1); the 220VAC input end is connected to the input end of the AC-DC power isolation module (U1) through the power switch 1 (Q1), the output end of the AC-DC power isolation module (U1) is connected to the other input end of the power switching module (U3), the two ends of the first linkage switch (K1) are respectively connected to the output end and the ground end of the AC-DC power isolation module (U1) in a one-to-one correspondence, and a resistor 1 (R1) is connected between the first linkage switch (K1) and the reference ground.

9. A power supply system according to claim 8, characterized in that: The power switching module (U3) is provided with two control terminals respectively connected to the power switch 1 (Q1) and the power switch 2 (Q2) in a one-to-one correspondence, and the switching states of the power switch 1 (Q1) and the power switch 2 (Q2) are opposite.

10. A power supply system according to claim 8, characterized in that: A second indicator light (HL2) is provided between the output end and the ground end of the DC-DC power isolation module (U2), and a first indicator light (HL1) is provided between the output end and the ground end of the AC-DC power isolation module (U1).

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