Controller control method for vehicle air compressor and steering oil pump all-in-one machine

Abstract

The invention discloses a controller control method for a vehicle air compressor and steering oil pump all-in-one machine. The controller control method comprises the following steps that an air compressor starting signal sent by a whole vehicle end is received; in response to the starting signal, a motor is controlled to be actively reduced to a preset rotating speed N3 from a rated rotating speed N1; after the rotating speed of the motor reaches N3, the electromagnetic clutch is controlled to be attracted so as to be connected with the air compressor; after the electromagnetic clutch is closed, the rotating speed of the motor is reduced from N3 to the minimum rotating speed N4 meeting the working requirement of the steering oil pump; after the system operates stably, the rotating speed of the motor is increased to the rated rotating speed N1; wherein the set value of N3 meets the condition that the impact current A2 generated when the electromagnetic clutch is attracted is smaller than the maximum allowable current of the motor. According to the technical scheme, higher stability is achieved, the service life of the motor is prolonged, impact on a motor shaft is reduced, impact on a crankshaft part in the air compressor is reduced, the clutch load is reduced, and the system maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of controllers, in particular to a controller control method of a vehicle air compressor and steering oil pump integrated machine. BACKGROUND

[0002] After the existing vehicle is equipped with an air compressor and a steering oil pump integrated machine, the motor synchronously drives the steering oil pump and the air compressor. The steering oil pump is directly connected with the motor and continuously operates, and the air compressor is intermittently operated by installing an electromagnetic clutch between the air compressor and the motor. When the air compressor is started when the oil pump is normally operated, the electromagnetic clutch is attracted instantaneously, and due to the great inertia of the air compressor, the motor torque demand is increased and the motor speed is reduced from the rated speed N1 to N2. At this time, the motor generates a large impact current A1, and when the steering assist oil pump load is large, the current value will exceed the maximum current of the motor, causing certain irreversible damage to the motor (such as motor power reduction, motor overheating, motor demagnetization, and motor service life reduction). SUMMARY

[0003] The technical solution of the present application to solve the above technical problems is to provide a controller control method of a vehicle air compressor and steering oil pump integrated machine, comprising the following steps:

[0004] Step 1: receiving an air compressor starting signal sent by the whole vehicle end;

[0005] Step 2: in response to the starting signal, controlling the motor to actively reduce from the rated speed N1 to a preset speed N3;

[0006] Step 3: after the motor speed reaches N3, controlling the electromagnetic clutch to be attracted to connect the air compressor;

[0007] Step 4: after the electromagnetic clutch is attracted, the motor speed is reduced from N3 to the minimum speed N4 that meets the working of the steering oil pump;

[0008] Step 5: after the system runs stably, the motor speed is increased to the rated speed N1;

[0009] Wherein, the set value of N3 satisfies: the impact current A2 generated when the electromagnetic clutch is attracted is less than the maximum allowable current of the motor.

[0010] The controller control method of the application has high protection, avoids motor overheating and motor life reduction caused by motor working under large current, prevents safety problems such as steering power failure caused by motor power reduction, and serious phenomena such as economic loss and even personnel casualty; the controller control method has higher stability, improves motor service life, reduces impact on the motor shaft and the crankshaft part of the air compressor, protects the clutch under load reduction, and reduces system maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0012] Figure 1 The step flow chart of the controller control method of the vehicle air compressor and steering oil pump integrated machine. DETAILED DESCRIPTION

[0013] The application provides a controller control method of a vehicle air compressor and steering oil pump integrated machine, aiming to design a controller control strategy to avoid the phenomenon of working under large current during motor working.

[0014] The controller control method proposed by the application will be described in specific embodiments as follows:

[0015] In the technical solution of the embodiment, as shown in Figure 1 A controller control method of a vehicle air compressor and steering oil pump integrated machine includes the following steps:

[0016] Step 1: receiving an air compressor starting signal sent by the whole vehicle end;

[0017] Step 2: in response to the starting signal, controlling the motor to actively reduce from the rated speed N1 to the preset speed N3;

[0018] Step 3: after the motor speed reaches N3, controlling the electromagnetic clutch to be attracted to connect the air compressor;

[0019] Step 4: after the electromagnetic clutch is attracted, the motor speed is reduced from N3 to the minimum speed N4 that meets the working of the steering oil pump;

[0020] Step 5: after the system runs stably, the motor speed is increased to the rated speed N1;

[0021] The set value of N3 satisfies: the impact current A2 generated when the electromagnetic clutch is attracted is less than the maximum allowable current of the motor.

[0022] The specific implementation method is a controller control method of a vehicle air compressor and steering oil pump integrated machine, including the following steps:

[0023] Step 1: receiving an air compressor starting signal sent by the whole vehicle end;

[0024] Step 2: in response to the starting signal, the motor is actively reduced from the rated speed N1 (1500 rpm) to the preset speed N3 (1300 rpm);

[0025] Step 3: after the motor speed reaches N3, the electromagnetic clutch is attracted to connect the air compressor;

[0026] Step 4: after the electromagnetic clutch is attracted, the motor speed is reduced from N3 to the minimum speed N4 (1150 rpm) that meets the working of the steering oil pump;

[0027] Step 5: after the system runs stably, the motor speed is increased to the rated speed N1;

[0028] The set value of N3 satisfies: the impact current A2 generated when the electromagnetic clutch is attracted is less than the maximum allowable current of the motor.

[0029] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A controller control method for an integrated vehicle air compressor and power steering pump, characterized in that, Includes the following steps: Step 1: Receive the air compressor start signal from the vehicle end; Step 2: In response to the start signal, control the motor to actively reduce from the rated speed N1 to the preset speed N3; Step 3: After the motor speed reaches N3, control the electromagnetic clutch to engage to connect the air compressor; Step 4: After the electromagnetic clutch engages, the motor speed drops from N3 to the minimum speed N4 required for the steering pump to operate; Step 5: After the system is running smoothly, increase the motor speed to the rated speed N1; Among them, the setting value of N3 satisfies the following condition: the impact current A2 generated when the electromagnetic clutch is engaged is less than the maximum allowable current of the motor.

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