48results about How to "Avoid crash noise" patented technology

The present invention aims to provide a pneumatic tire capable of effectively preventing a large collision noise caused by simultaneous collision of a plurality of blocks of each row with a road surface. The six block rows (9, 10, 13) on the tread contact surface (1) consist of five circumferential grooves (2, 3, 4) extending continuously in a zigzag manner in the circumferential direction of the tread. A plurality of transverse grooves (5, 6, 11) extending in the tread width direction are defined between adjacent circumferential grooves and between the outermost circumferential groove (4) and the corresponding tread side edge (e). The five circumferential grooves (2, 3, 4) include circumferential narrow grooves (2, 4) and a pair of circumferential wide grooves 3, and a pair of circumferential wide grooves (3) are arranged on both sides of the tire equator line and are narrower than the circumferential direction The width of the slots (2, 4) is wide. The transverse grooves (5, 6) are inclined relative to the tread width direction. Each pattern block (7, 8, 12) of the pattern block row (9, 10, 13) has a polygonal plane profile shape with more than six sides, and at the same time, the minimum length of the pattern block in the tread width direction is located at the The length in the tread width direction of the central portion of the block in the tread circumferential direction is longer than the length in the tread width direction of the end portion in the tread circumferential direction. The tread edges (7a, 8a, 12a) of the blocks (7, 8, 12) of each block row (9, 10, 13) are spaced apart from each other in the circumferential direction of the tread when the tire rolls under load.

A method for controlling a stop operation of an air conditioner having a compressor, a four-way valve, an electronic expansion valve (EEV), an indoor fan and an outdoor fan, includes the steps of stopping the operations of the compressor and the indoor fan if an operation stop signal is inputted during a heating operation; and checking an amount of elapsed time after the turn-offs of the compressor and the indoor fan, and turning off the EEV and the outdoor fan if the amount of elapsed time reaches a preset reference time. The methods also includes the steps of detecting pressures at an inlet side and at an outlet side of the compressor to calculate a pressure difference; and turning off the four-way valve if the calculated pressure difference reaches a preset reference pressure difference.

The present invention relates to a device for varying a stroke of a clutch pedal. More particularly, the present invention relates to a device for varying a stroke of a clutch pedal applied to a pedal unit of a clutch system of a manual transmission and varying an effective stroke of a clutch pedal depending on a vehicle speed signal and an engine RPM signal thereby preventing energy collision noise of a driving system.

A presser device for a sewing machine includes a first lever having a cloth pressing portion which is swingably mounted on a presser foot, the cloth pressing portion being swung so as to be switchable between a cloth pressing position and a raised position, a second lever having a support portion where the second lever is pivotally supported on an upper part of the first lever and an abutment which is normally in abutment with a needlebar assembly moved up and down, a first biasing member which biases the first lever so that the first lever is caused to pivot in such a direction that the cloth pressing portion becomes a cloth pressing position, and a second biasing member which biases the second lever so that the second lever is caused to pivot in such a direction that the abutment of the second lever is abutted against the needlebar assembly.

A system of controlling a sliding member for a vehicle includes a motor, a pulse generating device, a counting device and a control device. The system has a range for movement of the sliding member between a position short of a first lock position and a position short of a second lock position. Also, the system has an error range within the range for movement of the sliding member and memorizes in advance a range of pulse count representative of the error range. If a pulse count counted by the counting device falls within the range of pulse count when the sliding member discontinues movement due to detection of an overload of the motor, the system resets a pulse count counted by the counting device at one of the first and second lock positions.

The invention provides a new pressing type rebound buffer lock. The lock comprises a rebound lock which comprises a driving assembly arranged in a shell, a transmission assembly and a linkage assembly; the driving assembly comprises a driving mounting part, a driving push block which is installed on the driving mounting part in a reciprocating sliding mode and abuts against and cooperates with a bump on a buffer guide rail arranged in advance and a driving push rod hinged to the driving push block, the transmission assembly comprises a transmission mounting part, a transmission stop block hinged to the transmission mounting part, a telescopic spring with the two ends connected with the shell and the transmission mounting part respectively and a transmission rebound block which is formed onthe transmission mounting part and abuts against and cooperates with the driving rebound block, and the linkage assembly comprises a linkage rod and a linkage part performing reciprocating sliding ina linkage sliding groove formed in the shell in advance.

A drum type washing machine having a balancer to prevent a reduction in the washing capacity of a rotating drum while preventing a collision noise of balls installed in the balancer. The diameter of the balls is maintained in a range of 12 millimeters to 30 millimeters, so as to prevent a collision noise of the balls during rotation of the rotating drum while preventing a reduction in the washing capacity of the rotating drum.

The invention discloses an engine decoration cover. The engine decoration cover comprises a cover plate. Concave parts used for avoiding a gas inlet pipe of an engine are arranged on the portion, placed below the gas inlet pipe of the engine, of the right side part of the cover plate in a separated manner. By arranging the concave parts, the height of the right side part of the cover plate is reduced, the problem that the engine decoration cover interferes with a quarter-wavelength pipe in a gas inlet system is solved, collision noise in the driving process is effectively avoided, and therefore driving noise is reduced. The invention further discloses an automobile with the engine decoration cover.