Dynamometer-system dynamo control device and engine starting method therefor

Patent metadata

Field	Value
Publication number	US-10190944-B2
Application number	US-201615774835-A
Country	US
Kind code	B2
Filing date	Nov 2, 2016
Priority date	Nov 9, 2015
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

Provided is a dynamometer-system dynamo control device that can appropriately suppress the occurrence of resonance phenomena and can realize a no-load state, even in a case where an engine the inertia of which is unknown is connected. The dynamometer system comprises a dynamometer and a shaft torque meter. A dynamo control device 6 in the dynamometer system generates a torque current command signal on the basis of a torque detection signal and a torque command signal. The dynamo control device 6 comprises: a gain calculation unit 62 that multiplies the difference between the torque command signal and the torque detection signal by gain wATR and then by Ki; an integration operation unit 63 that integrates the output signal of the gain calculation unit 62; a high-pass filter 64 characterized by a response frequency wHPF; and a torque current command signal generation unit 65 that generates a torque current command signal by superimposing, onto the output signal of the integration operation unit 63, an output signal obtained by inputting the torque detection signal to the high-pass filter 64.

First claim

The invention claimed is:

1. A dynamo control device for a dynamometer system, the dynamometer system including a dynamometer that is coupled to an output of an engine serving as a test piece with a shaft, a torque detector that detects torsion torque in the shaft and an inverter that supplies power to the dynamometer, the dynamo control device generating a torque current command signal for the inverter based on a torque detection signal of the torque detector and a torque command signal corresponding to a command for the torque detection signal, the dynamo control device comprising:
a gain calculation unit which multiplies a difference between the torque command signal and the torque detection signal by a predetermined gain;
an integration operation unit which integrates an output signal of the gain calculation unit;
a high-pass filter that passes only a component on a high-frequency side with respect to a predetermined response frequency and attenuates a component on a low-frequency side with respect to the response frequency; and
a torque current command signal generation unit which generates the torque current command signal by superimposing, on an output signal of the integration operation unit, an output signal obtained by inputting the torque detection signal to the high-pass filter.

2. The dynamo control device of the dynamometer system according to claim 1 , wherein the gain calculation unit multiplies the difference between the torque command signal and the torque detection signal by a first gain that is a constant having a frequency dimension and a second gain that is a dimensionless constant.

3. The dynamo control device of the dynamometer system according to claim 2 , wherein the first gain is set to a value which is substantially equal to the response frequency.

4. A method of starting an engine of a dynamometer system, wherein while the torque current command signal in which the torque command signal is set to 0 and which is generated with the dynamo control device according to claim 3 is being input to the inverter, a motor other than the dynamometer is used so as to start the engine.

5. The dynamo control device of the dynamometer system according to claim 3 , wherein the second gain is set to a value calculated by use of a design value of inertia of the dynamometer and an upper limit value and a lower limit value of inertia of the test piece.

6. The dynamo control device of the dynamometer system according to claim 2 , wherein the second gain is set to a value calculated by use of a design value of inertia of the dynamometer and an upper limit value and a lower limit value of inertia of the test piece.

7. A method of starting an engine of a dynamometer system, wherein while the torque current command signal in which the torque command signal is set to 0 and which is generated with the dynamo control device according to claim 6 is being input to the inverter, a motor other than the dynamometer is used so as to start the engine.

8. A method of starting an engine of a dynamometer system, wherein while the torque current command signal in which the torque command signal is set to 0 and which is generated with the dynamo control device according to claim 2 is being input to the inverter, a motor other than the dynamometer is used so as to start the engine.

9. A method of starting an engine of a dynamometer system, wherein while the torque current command signal in which the torque command signal is set to 0 and which is generated with the dynamo control device according to claim 1 is being input to the inverter, a motor other than the dynamometer is used so as to start the engine.

Assignees

• Meidensha Electric Mfg Co Ltd

Inventors

• Akiyama Takao

Classifications

• G01M15/02 Primary

  Details or accessories of testing apparatus · CPC title

• G01L3/14

  wherein the torque-transmitting element is other than a torsionally-flexible shaft · CPC title

• G01M15/044

  by monitoring power, e.g. by operating the engine with one of the ignitions interrupted; by using acceleration tests · CPC title

• G01M15/05

  by combined monitoring of two or more different engine parameters · CPC title

• G01L3/242

  by measuring and simultaneously multiplying torque and velocity · CPC title