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Control equipment for motor driven hydraulic pump

A technology for controlling equipment and hydraulic pumps, which is applied in pump control, mechanical equipment, engine components, etc., and can solve problems such as inability to detect reverse rotation of the pump and increase in current

Active Publication Date: 2007-12-05
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the apparatus disclosed in JP-A-H4-284155 can only detect an abnormal increase in current at a time in which the motor of the pump is locked, but disadvantageously, cannot detect the pump power associated with a small change in the current value. reverse rotation of

Method used

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  • Control equipment for motor driven hydraulic pump
  • Control equipment for motor driven hydraulic pump
  • Control equipment for motor driven hydraulic pump

Examples

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Embodiment Construction

[0013] Embodiments of the present invention will be described with reference to the drawings. In this embodiment, the engine control system is designed for a two-wheel vehicle gasoline engine, which is used as an internal combustion engine. The control system controls fuel injection amount and ignition timing by using an electronic control unit (hereinafter referred to as ECU) as a center. First, an overall schematic configuration diagram of an engine control system will be described with reference to FIG. 1 .

[0014] In the engine 10 shown in FIG. 1 , the air filter 12 is disposed at the most upstream portion of the intake pipe 11 and the throttle valve 14 is disposed downstream thereof. The air filter 12 is provided with an intake sensor 13 for sensing intake air temperature. The throttle valve 14 is provided with a throttle opening position sensor 15 for sensing the throttle opening. An intake pipe pressure sensor 16 for sensing intake pipe pressure is provided downstre...

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Abstract

The present invention relates to a controlling equipment of the hydraulic pump (46) driven by the electric motor, the hydraulic pump (46) includes a motor (47) without an electric brush which activates the hydraulic pump (46), the controlling equipment includes a rotation velocity control device (50), an actual velocity calculating device (50, S103), a service voltage detecting device (50, S102) and a rotation direction confirming device (50, S105). The rotation velocity control device (50) outputs the pulse width modulating signal to control the rotation speed of the motor (47) without electric brush. The actual velocity calculating device (50, S103) calculates the actual rotation speed (NEP) of the hydraulic pump (46) according to the pulse width modulating signal. The service voltage detecting device (50, S102) senses the service voltage (VP) provided to the hydraulic pump (46). The rotation direction confirming device (50, S105) confirms the rotation speed of the hydraulic pump (46) according to the actual rotation speed (NEP) of the hydraulic pump (46) and the service voltage (VP), wherein the actual rotation speed (NEP) of the hydraulic pump is calculated by the actual velocity calculating device (50, S103), and the service voltage (VP) is sensed by the service voltage detection device (50, S102).

Description

technical field [0001] The invention relates to a control device for an electric motor driven hydraulic pump. Background technique [0002] Conventionally, as a control device of this type of hydraulic pump, there has been known a device for controlling a motor-driven fuel pump that uses an electric motor as a drive source for taking in fuel from a fuel tank of a vehicle and pumping out the fuel ( For example, see JP-A-H4-284155). The apparatus disclosed in JP-A-H4-284155 detects a pump driving current, determines that the motor of the pump is locked when the driving current increases abnormally, and thereby detects abnormal rotation of the fuel pump. [0003] In addition, since the rotor magnet stops at a different position each time, the motor may start to rotate in a reverse direction from the normal rotation direction depending on the stop position of the rotor. However, the apparatus disclosed in JP-A-H4-284155 can only detect an abnormal increase in current at a time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D15/00F04D13/06F02M37/08
Inventor 黑田京彦长田喜芳大竹晶也
Owner DENSO CORP
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