51results about How to "Suppress abnormal noise" patented technology

A vehicle air conditioner, which can suppress the occurrence of an abnormal noise when switching the operation mode of air conditioning, is provided. The vehicle air conditioner comprises compression means for compressing a heating medium, pressure reducing means for reducing the pressure of the heating medium, a heat exchanger for performing heat exchange between the heating medium and air, a flow passage having a heating path and a cooling path, a flow passage selector valve for changing the path in the flow passage, and a control unit for allowing the flow passage selector valve to act in accordance with an air conditioning operation mode. If a switching instruction on the air conditioning operation mode is inputted, the control unit stops the compression means and also defers the action of the flow passage selector valve until a predetermined time elapses or until a pressure difference between the paths becomes a predetermined value or less.

There is provided a pillar trim structure. A plate-shaped slider is configured to slide on a backside of a pillar trim in a longitudinal direction. A tunnel part is provided at an upper end of the backside of the pillar trim and formed with a through-hole. A rib is provided so as to stand at one side of an entrance of the through-hole over the longitudinal direction and inclined so that one edge of the slider gets away from the pillar trim as the slider gets over the rib. The entrance is cut out in an elongated shape at an opposite side and is cut out widely so that the entrance is more inclined with respect to the pillar trim than the slider from a predetermined starting point towards the one side and the entrance abuts on the slider at the starting point.

The invention discloses an evaporated fuel processing device. This evaporated fuel processing device is provided with: an evaporated fuel passage (16) through which a fuel tank (2) and a canister (3)communicate with each other; a blocking valve (21) opening / closing the evaporated fuel passage (16); a purge passage (19) through which the canister (3) and an intake passage (17) of an internal combustion engine (1) communicate with each other; a first purge control valve (23) opening / closing the purge passage (19); a tank opening passage (31) through which an upstream side position from the first purge control valve (23) in the purge passage (19) and the fuel tank (2) communicate with each other; and a second purge control valve (32) opening / closing the tank opening passage (31). When a negative pressure is formed in the fuel tank (2), the second purge control valve (32) is opened, thereby introducing atmospheric pressure through the canister (3).

An outdoor unit of an air conditioner in which a wind whistling sound and a vibration noise due to airflow are reduced is provided. The outdoor unit includes an outdoor heat exchanger (13), a fan (29), a motor (70) for driving the fan (29), and a motor support table (63) for supporting the motor (70). The fan (29) blows air to the outdoor heat exchanger (13) and promotes heat exchange between refrigerant and air. The motor support table (63) is provided with a rectifying member (64), and the rectifying member (64) deflects air flowing toward the motor support table (63) in a predetermined direction.

The invention provides a check valve which comprises a valve seat component, a valve main body of a limiting part, a circular plate part, a plurality of guide parts protruding from the periphery of the circular plate part and a valve body capable of moving between the valve seat component and the limiting part and losing the valve due to dead weight, wherein fluid passages are formed in the periphery of the circular plate part by gaps between the adjacent guide parts; on the moving range part of the valve main body corresponding to the valve body, convex parts protruding from the inner side of the valve main body are arranged; the condition that the valve body rotates due to the rotation component of the fluid cannot happen in the check valve.

A slide device for a vehicle, wherein the slide device has a long stroke for adjustment in which a second rail can be adjusted so as to be smoothly movable without play in the front-rear direction along a first rail. In the slide device for a vehicle, rolling elements (42) are annularly arranged in a mounting section (43) mounted on the second rail (20). When the second rail (20) slides on the first rail (10), the rolling elements (42) are always in contact with an operation surface (46) of the first rail (10) and with an operation surface (47) of the mounting section (43), and as a result, play in the top-bottom and left-right directions of the second rail (20) relative to the first rail (10) is eliminated. Also, because the rolling elements (42) roll and circulate in the mounting section (43), the second rail (20) smoothly moves in the front-rear direction along the first rail (10).

An electrically powered suspension system includes: an electromagnetic actuator; an information acquisition unit configured to acquire time-series information related to stroke position of the electromagnetic actuator, information on stroke velocity, and an amount of change in stroke of the electromagnetic actuator and information on a stroke direction based on the time-series information; a damping force calculation unit configured to calculate target damping force based on the information on the stroke velocity; and a drive control unit configured to control driving of the electromagnetic actuator using target driving force obtained based on the target damping force. The damping force calculation unit calculates equivalent friction compensation force based on the amount of change in the stroke and the information on the stroke direction, and corrects the target damping force based on the calculated equivalent friction compensation force. The equivalent friction compensation force has elastic force component and dynamic friction force component.

A hollow inner section is formed when a pair of frames (16, 17) are combined, and a plate (38) which concentrates a magnetic flux is arranged on permanent magnets (32, 33) arranged inside the pair of frames (16, 17). In a diaphragm (21), a coil pattern (21b) which receives the magnetic flux from the plate (38) is formed on the vibrating film (21a), and the vibrating film (21a) having uniform thickness is formed as an uneven solid structure.

Abnormal noise generated while driving a piezoelectric actuator is prevented. A pulse-generation circuit is capable of selectively generating a displacement pulse and a stationary pulse as a drive pulse for application to a piezoelectric element, the displacement pulse having a duty ratio for causing a lens to be displaced by a predetermined step width, and the stationary pulse having a duty ratio for causing the lens to remain stationary in a current position. The pulse-generation circuit controls the production of the drive pulse continuously for a plurality of times within the servo control cycle, causes the displacement pulse to be produced when the remainder of a required amount of displacement is equal to or greater than a threshold value, and causes the stationary pulse to be continuously produced until the initiation of the next servo control cycle when the remainder is less than the threshold value.

The present invention relates to a liquid-sealed vibration-damping device (10). This vibration-damping device (10) is configured such that a limiting passage (24) is provided with: a body passage (25) disposed within a partition member (16); a first communication section (26) for connecting the body passage (25) and a first liquid chamber (14); and a second communication section (27) for connecting the body passage (25) and a second liquid chamber (12), and the first communication section (26) and / or the second communication section (27) is provided with a plurality of openings (31).

The present invention provides a keyboard device, capable of fixing matrix part and plate part hard and reducing abnormity noise generated by key-press. The matrix part (21) is burned together with the plate part through supersonic welding, so as to fix each other hard compared to the condition of connecting through adhesive. Thus, it is able to restrain the matrix part (21) peeling off from the plate part (22) even though executants press key with high power or during a long time. Moreover, as to noses (31a to 31f) of the plate part (22), the occupied ratio of the noses relative to key-press part (2a) is more than that of the noses (31a, 31b) relative to a slightness part (2b), thus the welding connection of the key-press part (2a) is tighter. There is no clearance between the matrix part (21) and the plate part (22), so the key-press part (2a) can restrain the abnormity noise due to key-press.

A waste gate valve (7) of a turbocharger (3) is fully open during idling after warm-up is complete in order to reduce exhaust resistance, and during cool-down idling when a cooling water temperature (TW) is below a threshold value (TW1), the waste gate valve (7) is open-loop controlled to an intermediate opening degree that is smaller than fully open. The ignition time is delayed for catalyst warm-up. When the cooling water temperature (TW) reaches (t3) the threshold value (TW1), the opening degree of the waste gate valve (7) is set to fully open. When the accelerator opening degree (APO) becomes large (t4) before warm-up is complete, control of the opening degree is released.

A drive-side part having recesses and protrusions engages in a cup-side first part having recesses and protrusions, and the drive-side part having recesses and protrusions engages in a portion of a cup-side third part having recesses and protrusions that is positioned farther toward one axial side than a dividing wall part, such that interposed therebetween is a circumferential-direction gap larger than a circumferential-direction gap formed in the engagement part of the drive-side part having recesses and protrusions and the cup-side first part having recesses and protrusions. A driven-side part having recesses and protrusions engages with a cup-side second part having recesses and protrusions, and the driven-side part having recesses and protrusions engages in a portion of the cup-side third part having recesses and protrusions that is positioned farther toward another axial side than the dividing wall part, such that interposed therebetween is a circumferential-direction gap largerthan a circumferential-direction gap formed in the engagement part of the driven-side part having recesses and protrusions and the cup-side second part having recesses and protrusions. At least one portion of the dividing wall part is disposed between the axial end faces of a drive-side transmission member and a driven-side transmission member.

A bearing device for a wheel, in which circumferential play is suppressed, which facilitates connection between a hub ring and an outer coupling member, in which a reduction in NVH characteristics dueto play at a joint between the hub ring and the constant velocity universal joint and by play between a bearing outer member and a knuckle is prevented, and which performs highly accurate transmission of rotational torque. The bearing device has a groove-ridge fitting structure (M) by which the hub ring (1) and a shaft section (12) of the outer coupling member of the constant velocity universal joint (3) are integrated together, and the shaft section (12) is fitted in a hole (22) of the hub ring (1). In the groove-ridge fitting structure (M), ridges (35) on the outer diameter surface of the shaft section (12) and grooves (36) in the inner diameter surface (37) of the hub ring (1) are fitted to each other in a fitting contact portion (38), and the ridges (35) and the grooves (36) are in intimate contact with each other in the entire fitting contact portion (38).

Provided is a bearing device for a wheel that can realize prevention of a backlash in a circumferential direction and is excellent in workability of connection of a hub wheel and an outer joint member of a constant velocity universal joint. Further, provided is a bearing device for a wheel that can prevent deterioration in NVH characteristics, which is caused by the backlash occurring in a joint section between the hub wheel and the constant velocity universal joint or between an outer member and a knuckle, and can perform rotation torque transmission with high accuracy. The bearing device includes a recess-projection fitting structure (M) in which the hub wheel (1) and a shaft section (12), which is fitted in a hole (22) of the hub wheel (1) of the outer joint member of the constant velocity universal joint (3) are unitized together. In the recess-projection fitting structure (M), entire fitting regions among projections (35) on the outer surface of the shaft section (12) of the outer joint member and recesses (36), which fit on the projections, are brought into intimate contact with each other.

Force of used spring can be weak, wear amount of power transmission member (gear or the like) can be reduced, and generation of strange noises can inhibited. When the dial cam 50 is rotated and the recess 51 of the outer peripheral surface 52 faces the front end portion 32a of the pin 32 of the connection shaft 31, the connection shaft 31, which is biased by the force of the coil spring 40, is connected to the bevel gear 35, which engages with the bevel gear 14 and is rotated, via the clutch teeth 33 and 36. Thus, the connection shaft 31 is rotated, and the output shaft 20 is rotated together with the connection shaft 31. That is, the power of the motor 10 is transmitted to the output shaft 20. Since the coil spring 40 is used for connecting the connection shaft 31 to the bevel gear 35, the force of the coil spring 40 can be reduced.

The present invention has an object to provide a vibration isolation device through which it can be restrained that abnormal sound occurs when the inner pipe relatively displaces against the outer pipe. The stopper portion (32) has the communication passage (62) communicating the space (S) between the inner circumference side of the stopper portion (32) and the inner pipe (10) with outside when the inner pipe (10) relatively displaces against the outer pipe (20). Thereby, even if volume of the space (S) at the inner circumference side of the stopper portion (32) changes when the inner pipe (10) relatively displaces against the outer pipe (20), communication of air between the space (S) and outside is secured through the communication passage (62), therefore it can be restrained that atmospheric pressure within the space (S) changes. Thus, since it can be restrained that the stopper portion (32) closely contacts with the enlarged portion (13) as a suction cup, it can be restrained thatabnormal sound occurs when the inner pipe (10) relatively displaces against the outer pipe (20).