88results about How to "Suppression of abnormal noise" patented technology

A two-stage decompression ejector includes a variable throttle mechanism having a first throttle passage for decompressing a fluid and a valve body for changing a throttle passage area of the first throttle passage, a nozzle having therein a second throttle passage for further decompressing the fluid decompressed by the variable throttle mechanism, and a suction portion for drawing a fluid by a suction effect of a high-velocity jet fluid from the nozzle. The formula of 0.07≦Vo×S/vn≦0.7 is satisfied, in which Vo is an intermediate-pressure space volume (mm³) from an outlet of the variable throttle mechanism to an inlet of the second throttle passage, S is a throttle passage sectional area (mm²) of a minimum passage sectional area portion of the second throttle passage, and vn is a flow velocity (mm/s) of the fluid passing through the minimum passage sectional area portion.

Provided are a damper in which strange sound (whistling sound) generated when the damper has a small opening degree is suppressed, an air conditioning unit, and an air conditioner for vehicle. The damper has a wall surface (33) for forming a channel for allowing air to flow in it, a stationary portion (35) extending from the wall surface (33) toward the center of the channel (23), and a rotation portion (25) rotatably placed in the channel (23) and having one end (29) in contact with a portion of the stationary portion (35), which portion is on the downstream side of air flow in the channel (23). A curved wall portion (45) curved and projected toward the center of the channel (23) is formed at that position on the wall surface (33) with which the air flow passed between one end (29) and the stationary portion (35) collides.

A motor drive device has a drive circuit for driving a motor, and a control section for controlling the drive circuit. The control section has a current command value calculating portion for calculating a current command value, a rotation calculating portion for calculating a rotation angle and an angular speed of the motor, a current command value correcting portion for correcting the current command value based on the rotation angle, a voltage command value calculating portion for calculating a voltage command value based on the current command value, a voltage command value correcting portion for correcting the voltage command value based on the current command value and the rotation angle and the angular speed, and a drive signal generating portion for generating a drive signal based on the voltage command value.

A retractable seat device includes a seat body having first and second ends rotatably connected to rear and front legs, respectively, first and second arms, and a link. When the first arm is rotated in a second direction, the rear leg and the front leg connected to the rear leg with the link are unfolded, a rear lock mechanism provided on the rear leg becomes engaged with a first striker provided on the vehicle floor, and then a front lock mechanism provided on the front leg becomes engaged with a second striker provided on the vehicle floor, so that the seat body is supported on the vehicle floor by the rear leg and the front leg. The rear lock mechanism has an interlock structure including a ratchet and a pawl, and the front lock mechanism has a hook lock structure including a hook.

A hinge mechanism includes: a bracket 2 having a rotation shaft portion insertion hole 2a for inserting through a marginal rotating shaft portion 3b thereof, and one engaging concavo-convex section 2b; a plate 5 having a mounting shaft portion insertion hole 5a; and a leaf spring 4 having a mounting shaft portion insertion hole 4a and the other engaging concavo-convex section 4c, and located between the bracket 2 and plate 5 and mounted to the rotation shaft 3, wherein the hole 5a is formed larger than the hole 4a such that the spring 4 is caulked and fixed to the end face of the shaft portion by entering of the outer wall side part of a mounting shaft portion 3c formed on the end face of the portion 3b that is collapsed by caulking into a gap 5c formed between the portion 3c and insertion hole 5a.

The invention provides a toner for electrostatic image development, a toner cartridge, a process cartridge and an image forming apparatus. The toner for electrostatic image development contains a toner particle and external additive particles adhered to the surface of the toner particle, each of the external additive particles being constituted of plural irreversibly coalesced primary particles.

The present invention is to suppress a generation of a noise due to repeatedly hitting a clutch plate against a clutch cover and a clutch guide. A webbing take-up device is provided with a clutch cover fixed to a sub-torsion shaft so as to be rotatable integrally therewith; a clutch guide arranged so as to face the clutch cover, and supported capable of relatively rotating to the sub-torsion shaft; a lock ring formed around the clutch cover and the clutch guide; and a clutch plates turned to a lock ring side while being guided by the clutch guide in accordance with relative rotation of the clutch guide to the clutch cover into one rotational direction, and engaged with the lock ring. L-shaped springs which urge the clutch plates to a clutch cover side are formed integrally with the clutch guide.

Inner rings of bearings arranged at both ends of a rotor shaft are fixed to the rotor shaft, and outer rings of both of the bearings are arranged at bearing holding parts movably in an axial direction of the rotor. A preload imparting member is attached to one of the bearings, the preload imparting member being configured to bias the rotor shaft in one direction and to apply a biasing force to make a housing and a flange, which constitute a chassis, come close to each other.

When a conversion catalyst in a catalytic converter is warmed up, a required efficiency ηtag is set such as to be within a range of less than 1 that is a value when the conversion catalyst is not warmed up and to increase with an increase in delay of an open-close timing VT of an intake valve (steps S130 to S160). A delayed amount of a target ignition timing IT* is decreased with an increase in required efficiency ηtag (closer to the value 1) (steps S170 and S180).

A pump housing, a fixing member and a holding member are assembled in the axis direction of an oil pump to fix a stator and a rotor of a brushless motor. The holding member is made of metal material and has a cylindrical shape that extends from its bottom portion toward one side in the axial direction. The fixing member is a cylindrical metal member. Stepped portions, extending in the circumferential direction, are formed in the outer periphery of the holding member and the inner periphery of the fixing member, and contact each other. The outer periphery of the holding member engages with the inner periphery of the fixing member. The outer periphery of the other end portion of the fixing member is fitted to the inner periphery of a flange portion projecting from the end face of the pump housing, which is adjacent to the brushless motor.

The invention provides a throttle valve device, which can improve removing performance of freezing between a valve core and a hole inner wall of a throttle valve. The throttle valve device is characterized in that, a throttle valve shaft (4) is made to rotate via use of a motor, etc. An opening degree, which is decided by a throttle valve core (5), of a hole (11) is changed, and air inlet flow of the hole is adjusted. The throttle valve shaft is supported to be rotatable by a pair of sliding bearings (21A, 21B) disposed corresponding to two end parts of the throttle valve shaft. Two bearings are disposed at a throttle valve body (2) or a throttle valve pipe (12) in a mode that the throttle valve shaft is adjacent to a downstream side end (11b) of the hole. When the throttle valve core becomes a closed state of almost completely closing the hole, the throttle valve core is configured to form a specified closed angle (theta 1) with the radial direction of the hole, one end part (5a) of the throttle valve is adjacent to a downstream side end of the hole. When the throttle valve core starts to open the hole, one end part (5a) of the throttle valve is immediately exposed.

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 a vortex compressor as well as a fixed vortex member and a movable vortex member. On the one hand, the vortex compressor comprises a compression mechanism, an exhaust port and an emission space, wherein the compression mechanism comprises a fixed vortex member and a movable vortex member, the fixed vortex member comprises a fixed vortex end plate and a fixed vortex roll, the movable vortex member comprises a movable vortex end plate and a movable vortex roll, and the fixed vortex roll and the movable vortex roll are combined together to limit a plurality of compression chambers including first compression chambers and second compression chambers; the exhaust port is suitable for communicating with the first compression chambers; and the emission space is suitable for communicating with the exhaust port. The first compression chambers, the exhaust port and the emission space form a high-pressure area. The vortex compressor also comprises a communicating passage which is set to ensure that at least one of the second compression chambers and the high-pressure area can be communicated with each other before a vortex roll separation point. According to the invention, the pressure of the first / center compression chambers can be changed more gently, so that the problem of high noise can be effectively solved, and the energy efficiency ratio and working stability of the compressor can be improved.

A storage device for a vehicle includes a storage section which has a space and has an engagement hole provided on the back side in a mounting direction and in which an article is put in and taken out through an opening portion, and a detachable separator which partitions the space in the storage section, is formed in a substantially L shape having two plate sections intersecting one another when viewed from the mounting direction into the storage section, has a projecting portion which protrudes toward the front in the mounting direction and is engaged with the engagement hole, and is mounted in the engagement hole at a partitioning position to divide the space into two compartments and a compartment expanding position to form a single compartment larger than either of the two compartments in the space.