A fuel delivery pipe capable of reducing a pressure pulsation when fuel is injected from an injection nozzle, preventing vibration and noise from under-floor piping, and reducing radiant sound from a fuel delivery body, wherein a flexible absorbing wall surface (10) installed on the wall surface of the fuel delivery body (1) is deformed by a variation in internal pressure to increase the inside volume of the fuel delivery body (1), αL/√V determined by the sound velocity αL of the fuel flowing through the fuel delivery body (1) and the inside volume V of the fuel delivery body (1) is 20 x 103 (m-0.5·sec-1) ≤ αL/√V ≤ 85 x 103 (m-0.5·sec-1) and the ratio αL/αH of the sound velocity αL of the fuel to an equivalent sound velocity αH in a high frequency area is αL/αH ≤ 0.7, and the sectional shape of the fuel delivery body (1) in a direction perpendicular to the axis thereof is formed in a generally mortar shape, generally flask shape, generally trapezoidal shape, generally key shape, or generally goggle shape.

Fuel delivery pipe

The present invention provides a gear mechanism of a power transmitting system, which includes a crank gear operatively coupled with a crankshaft, and a first driven gear (31) that is coupled with a first balance shaft (30) via a damping mechanism (54) that allows relative rotation between the driven gear and the balance shaft. The damping mechanism includes a friction damper (54a, 54b) that generates frictional force when the first driven gear and a counter gear fixed to the first balance shaft rotate relative to each other within a predetermined rotational phase range or angle, and a stopper rubber or rubbers (55a, 55b) that elastically deforms to generate elastic force when the first driven gear and the first balance shaft rotate relative to each other beyond the predetermined rotational angle.

Gear mechanism of power transmitting system

A method of controlling a fuel injection device that can control a small amount of injection is provided. A fuel injection device for use in an internal combustion engine, includes: a valve body that can open and close a fuel passage, a needle that transfers a force with the valve body, and executes valve opening/closing operation, and an electromagnet that includes a coil and a magnetic core provided as a driver for driving the needle, and a cylindrical nozzle holder disposed on an outer periphery of the magnetic core and the needle, in which a current is supplied to the coil to exert a magnetic attractive force between the magnetic core and the needle to open the valve body.

Fuel injection device

The invention relates to a fuel-injection system (1) comprising at least one fuel-injection valve (1a) and an adapter that can be heated (1b), which is attached to a fuel rail (1c) and to the fuel-injection valve (1a) of the fuel-injection system (1). The fuel rail (1c) is equipped with a thermal switch (2), which is connected to an external door contact switch (3) and to the heatable adapter (1b). The thermal switch (2) has a thermal sensor to ensure a reliable start from cold. In said system, if the fuel temperature falls below a predefined fuel temperature, a changeover of the thermal switch (2) causes the fuel (8) to be heated.

Fuel Injection System

Several embodiments of noise reduction apparatus for a fuel injector are disclosed and include perforated tubes, side branch filters and expansion chambers strategically located between a respective injector and the fuel rail to target and reduce high frequency noise generated by the mechanical movement of the fuel injector.

Fuel injector noise mufflers

PROBLEM TO BE SOLVED: To reduce radiation of an abnormal sound caused by the realization of high pressure of fuel control pressure, and to prevent fuel leakage by absorbing core dislocation of branch pipes and an injector SOLUTION: In a fuel distribution pipe 1 having a pipe body 2 and two or more of branch pipes 3 for inserting/connecting an injector 10, a bellows structure part 9 for showing pipe axis directional and pipe diameter directional elasticity is arranged between a base end part 7 close to the pipe body 2 of the branch pipes 3 and a tip part 8 for inserting/connecting the injector 10 The bellows structure part 9 is covered with a cylindrical wire net body 16 to restrain pipe axis directional expansive deformation of the bellows structure part 9 by fuel control pressure, and is fixed to the branch pipes 3 on both sides of the cylindrical wire net body 16 A filter noise eliminator 20 is arranged inside the branch pipes 3

Fuel distribution pipe

PROBLEM TO BE SOLVED: To provide a balance shaft device provided with a damper device having excellent workability. SOLUTION: A damper device 30 is located between the first gear 11 of a first shaft 10 and a drive gear 12. The damper device comprises a first spring holder 31 which is fixed at the first gear and at which four first spring stoppers are fixed; a second spring holders 35 to fix four second spring stopper approximately in the same position; a ring holder 41 to hold the two members 31 and 35: and four springs 43. When the first and second spring holders are concentrically rotated relatively, the first and second spring stoppers are arranged in a manner to prevent the occurrence of mutual interference to each other.

Balance shaft device

PROBLEM TO BE SOLVED: To reduce the number of part items and cost, precisely center an eccentric weight, a driven gear and a balance shaft and improve assembly workability on a balancer mechanism of an internal combustion engine. SOLUTION: A housing 2 is integrally formed so that a front shaft hole 6 and a rear shaft hole 7 are not divided. A first rotor 10 and a second rotor are axially supported in the shaft holes 6, 7. A tapered part 11b is provided on a first balance shaft 11 of the first rotor 10, and a tapered hole 16 is drilled through on a first eccentric weight 12 and a first driven gear 13. The first eccentric weight 12, the first driven gear 13 and the first balance shaft 11 are taper joined with each other as the tapered part 11b is pressure inserted into the tapered hole 16, and they rotate together.

Takeomi Yamamoto

Papers

Fuel distribution pipe

Balance shaft device

Balancer mechanism of internal combustion engine