IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0201962
(2009-07-08)
|
등록번호 |
US-8598831
(2013-12-03)
|
국제출원번호 |
PCT/JP2009/062453
(2009-07-08)
|
§371/§102 date |
20110817
(20110817)
|
국제공개번호 |
WO2011/004470
(2011-01-13)
|
발명자
/ 주소 |
- Ogawa, Atsushi
- Honma, Motohiko
- Inoue, Hirofumi
|
출원인 / 주소 |
- Toyota Jidosha Kabushiki Kaisha
|
대리인 / 주소 |
Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
15 |
초록
▼
A vehicle damper including an electromagnetic damper configured to generate a damping force with respect to a motion of a sprung portion and an unsprung portion toward each other and a motion thereof away from each other and includes: an electromagnetic motor; a motion converting mechanism; and an e
A vehicle damper including an electromagnetic damper configured to generate a damping force with respect to a motion of a sprung portion and an unsprung portion toward each other and a motion thereof away from each other and includes: an electromagnetic motor; a motion converting mechanism; and an external circuit which is disposed outside the electromagnetic motor and including a first connection passage and a second connection passage and which includes a battery-device connection circuit for connecting the motor and a battery device and a battery-device-connection-circuit-current adjuster configured to adjust an electric current that flows in the battery-device connection circuit, wherein the damper system further includes an external-circuit controller configured to control an electric current that flows in the electromagnetic motor by controlling the external circuit and configured to control a flow of an electric current between the battery device and the electromagnetic motor by controlling the battery-device-connection-circuit-current adjuster.
대표청구항
▼
1. A damper system for a vehicle which is mounted on the vehicle and which comprises an electromagnetic damper configured to generate a damping force with respect to a motion of a sprung portion and an unsprung portion toward each other and a motion thereof away from each other, wherein the electrom
1. A damper system for a vehicle which is mounted on the vehicle and which comprises an electromagnetic damper configured to generate a damping force with respect to a motion of a sprung portion and an unsprung portion toward each other and a motion thereof away from each other, wherein the electromagnetic damper includes: an electromagnetic motor;a motion converting mechanism configured to convert the motions of the sprung portion and the unsprung portion toward and away from each other into a motion of the electromagnetic motor and vice versa; andan external circuit disposed outside the electromagnetic motor and including (A) a first connection passage in which an electric current is allowed to flow from a first terminal as one of two terminals of the electromagnetic motor to a second terminal as the other of the two terminals while an electric current is prohibited from flowing from the second terminal to the first terminal, the first connection passage being configured not to be connected to a battery device mounted on the vehicle, and (B) a second connection passage which is provided separately from the first connection passage and in which the electric current is allowed to flow from the second terminal to the first terminal of the electromagnetic motor while the electric current is prohibited from flowing from the first terminal to the second terminal, the second connection passage being configured not to be connected to the battery device,wherein the electromagnetic damper is configured to generate the damping force that depends on an electromotive force of the electromagnetic motor, with respect to the motion of the sprung portion and the unsprung portion toward each other by permitting a generated current by the electromagnetic motor to flow through the first connection passage and with respect to the motion of the sprung portion the unsprung portion away from each other by permitting the generated current by the electromagnetic motor to flow through the second connection passage,wherein the external circuit includes: (C) a battery-device connection circuit which is provided separately from the first connection passage and the second connection passage and which is configured to selectively establish: (i) a first state in which the first terminal of the electromagnetic motor and a high-potential-side terminal of a battery device mounted on the vehicle are electrically connected and the second terminal of the electromagnetic motor and a low-potential-side terminal of the battery device are electrically connected while the first terminal and the low-potential-side terminal are not electrically connected and the second terminal and the high-potential-side terminal are not electrically connected; and ii) a second state in which the second terminal and the high-potential-side terminal are electrically connected and the first terminal and the low-potential-side terminal are electrically connected while the first terminal and the high-potential-side terminal are not electrically connected and the second terminal and the low-potential-side terminal are not electrically connected; and(D) a battery-device-connection-circuit-current adjuster configured to adjust an electric current that flows in the battery-device connection circuit,wherein the damper system comprises an external-circuit controller configured to control an electric current that flows in the electromagnetic motor by controlling the external circuit, andwherein the external-circuit controller is configured to control a flow of an electric current between the battery device and the electromagnetic motor by controlling the battery-device-connection-circuit-current adjuster. 2. The damper system according to claim 1, wherein the external-circuit controller is configured to execute an active control for permitting the electromagnetic damper to generate not only the damping force that depends on the electromotive force generated in the electromagnetic motor, but also a propulsive force that depends on a supply power from the battery device, andwherein the external-circuit controller is configured to control, in the active control, a supply current that flows in the battery-device connection circuit from the battery device to the electromagnetic motor, by controlling the battery-device-connection-circuit-current adjuster, where a force to be generated by the electromagnetic damper becomes the propulsive force with respect to the motion of the sprung portion and the unsprung portion toward each other or the motion thereof away from each other. 3. The damper system according to claim 2, wherein the external-circuit controller is configured to determine, on the basis of an absolute speed of the sprung portion in a vertical direction, a target damper force as the force to be generated by the electromagnetic damper in the active control and to control the battery-device-connection-circuit-current adjuster where the determined target damper force becomes the propulsive force with respect to the motion of the sprung portion and the unsprung portion toward each other or the motion thereof away from each other. 4. The damper system according to claim 2, wherein the external circuit includes: a first-connection-passage-current adjuster provided in the first connection passage and configured to adjust the electric current that flows from the first terminal to the second terminal; and a second-connection-passage-current adjuster provided in the second connection passage and configured to adjust the electric current that flows from the second terminal to the first terminal,wherein the external-circuit controller is configured to control the generated current caused by the motion of the sprung portion and the unsprung portion toward each other by controlling the first-connection-passage-current adjuster and to control the generated current caused by the motion of the sprung portion and the unsprung portion away from each other by controlling the second-connection-passage-current adjuster, andwherein the external-circuit controller is configured to control the first-connection-passage-current adjuster where the target damper force becomes the damping force with respect to the motion of the sprung portion and the unsprung portion toward each other and to control the second-connection-passage-current adjuster where a force to be generated by the electromagnetic damper becomes the damping force with respect to the motion of the sprung portion and the unsprung portion away from each other, in the active control. 5. The damper system according to claim 4, wherein the external-circuit controller is configured to control also the second-connection-passage-current adjuster so as to control the generated current with respect to the motion of the sprung portion and the unsprung portion away from each other where the battery-device-connection-circuit-current adjuster and the first-connection-passage-current adjuster are controlled for controlling the electric current that flows in the electromagnetic motor in the motion of the sprung portion and the unsprung portion toward each other, andwherein the external-circuit controller is configured to control also the first-connection-passage-current adjuster so as to control the generated current with respect to the motion of the sprung portion and the unsprung portion toward each other where the battery-device-connection-passage-current adjuster or the second-connection-passage-current adjuster is controlled for controlling the electric current that flows in the electromagnetic motor in the motion of the sprung portion and the unsprung portion away from each other. 6. The damper system according to claim 5, wherein the external-circuit controller is configured to control the second-connection-passage-current adjuster such that a damping coefficient of the electromagnetic damper becomes a value suitable for damping a sprung-resonance-frequency-range component that is a component of a relative vibration of the sprung portion and the unsprung portion, where the battery-device-connection-circuit-current adjuster and the first-connection-passage-current adjuster are controlled for controlling the electric current that flows in the electromagnetic motor in the motion of the sprung portion and the unsprung portion toward each other, andwherein the external-circuit controller is configured to control the first-connection-passage-current adjuster such that the damping coefficient of the electromagnetic damper becomes a value suitable for damping the sprung-resonance-frequency-range component where the battery-device-connection-passage-current adjuster or the second-connection-passage-current adjuster is controlled for controlling the electric current that flows in the electromagnetic motor in the motion of the sprung portion and the unsprung portion away from each other. 7. The damper system according to claim 2, wherein the external-circuit controller is configured to execute the active control in a situation in which an intensity of a component of a vehicle vibration in a sprung resonance frequency range is higher than a prescribed value. 8. The damper system according to claim 2, wherein the external-circuit controller is configured to execute the active control in a situation in which a charged amount of the battery device is not lower than a threshold. 9. The damper system according to claim 2, wherein the external-circuit controller is configured to control at least a part of the generated current that flows in the battery-device connection circuit in association with the motion of the sprung portion and the unsprung portion toward each other and the motion thereof away from each other, by controlling the battery-device-connection-circuit-current adjuster where the electromotive force of the electromagnetic motor exceeds a voltage of the battery device. 10. The damper system according to claim 1, wherein the battery-device connection circuit includes: (c-1) a first battery-device connection passage including a first high-potential-side connection passage which connects the first terminal and the high-potential-side terminal of the battery device and a first low-potential-side connection passage which connects the second terminal and the low-potential-side terminal of the battery device; and (c-2) a second battery-device connection passage including a second high-potential-side connection passage which connects the second terminal and the high-potential-side terminal of the battery device and a second low-potential-side connection passage which connects the first terminal and the low-potential-side terminal of the battery device,wherein the battery-device-connection-circuit-current adjuster includes: (d-1) a first battery-device-connection-passage-current adjuster provided in the first battery-device connection passage and configured to adjust an electric current that flows therethrough; and (d-2) a second battery-device-connection-passage-current adjuster provided in the second battery-device connection passage and configured to adjust an electric current that flows therethrough, andwherein the external-circuit controller is configured (i) to establish the first state by controlling the first battery-device-connection-passage-current adjuster so as to permit the electric current to flow through the first battery-device connection passage and by controlling the second battery-device-connection-passage-current adjuster so as not to permit the electric current to flow through the second battery-device connection passage and (ii) to establish the second state by controlling the second battery-device-connection-passage-current adjuster so as to permit the electric current to flow through the second battery-device connection passage and by controlling the first battery-device-connection-passage-current adjuster so as not to permit the electric current to flow through the first battery-device connection passage. 11. The damper system according to claim 10, wherein the first battery-device-connection-passage-current adjuster includes two electrical connection•shut-off switching devices which are provided in the first high-potential-side connection passage and the first low-potential-side connection passage, respectively, and each of which is configured to place a corresponding one of the first high-potential-side connection passage and the first low-potential-side connection passage selectively in an electrically connected state in which each of the first high-potential-side connection passage and the first low-potential-side connection passage is electrically conductive and in an electrically shut-off state in which each of the first high-potential-side connection passage and the first low-potential-side connection passage is not electrically conductive,wherein the second battery-device-connection-passage-current adjuster includes two electrical connection•shut-off switching devices which are provided in the second high-potential-side connection passage and the second low-potential-side connection passage, respectively, and each of which is configured to place a corresponding one of the second high-potential-side connection passage and the second low-potential-side connection passage selectively in an electrically connected state in which each of the second high-potential-side connection passage and the second low-potential-side connection passage is electrically conductive and in an electrically shut-off state in which each of the second high-potential-side connection passage and the second low-potential-side connection passage is not electrically conductive, andwherein the external-circuit controller is configured (i) to establish the first state by establishing an electrically connected state of the first battery-device connection passage by the two electrical connection•shut-off switching devices that constitute the first battery-device-connection-passage-current adjuster and by establishing an electrically shut-off state of the second battery-device connection passage by the two electrical connection•shut-off switching devices that constitute the second battery-device-connection-passage-current adjuster and (ii) to establish the second state by establishing an electrically connected state of the second battery-device connection passage by the two electrical connection•shut-off switching devices that constitute the second battery-device-connection-passage-current adjuster and by establishing an electrically shut-off state of the first battery-device connection passage by the two electrical connection•shut-off switching devices that constitute the first battery-device-connection-passage-current adjuster. 12. The damper system according to claim 11, wherein each of at least one of the two electrical connection•shut-off switching devices of the first battery-device-connection-passage-current adjuster and at least one of the two electrical connection•shut-off switching devices of the second battery-device-connection-passage-current adjuster is constituted by a switching element configured to alternately and repeatedly establish the electrically connected state and the electrically shut-off state, andwherein the external-circuit controller is configured to control the electric current that flows in the battery-device connection circuit: by controlling, in the first state, a duty ratio of the at least one of the two electrical connection•shut-off switching devices of the first battery-device-connection-passage-current adjuster constituted by the switching element, the duty ratio being a ratio determined on the basis of a time during which the electrically connected state is established and a time during which the electrically shut-off state is established; and by controlling, in the second state, the duty ratio of the at least one of the two electrical connection•shut-off switching devices of the second battery-device-connection-passage-current adjuster constituted by the switching element. 13. The damper system according to claim 12, wherein the first battery-device connection passage is constituted by a part of one of the first connection passage and the second connection passage and one of the two electrical connection•shut-off switching devices of the first battery-device-connection-passage-current adjuster is provided in the part of the one of the first connection passage and the second connection passage, andwherein the second battery-device connection passage is constituted by a part of the other of the first connection passage and the second connection passage and one of the two electrical connection•shut-off switching devices of the second battery-device-connection-passage-current adjuster is provided in the part of the other of the first connection passage and the second connection passage.
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