Subaru Legacy/Outback

1999-2003 of release

Repair and car operation

Protivootkatnaja system - the device, a functioning and safety measure principle

The organisation scheme противооткатной systems


1 — ГТЦ 2 — the pressure Valve-terminator 3 — the Vacuum amplifier 4 — the Pedal of a foot brake 5 — a coupling Pedal 6 — the Cable of a drive of coupling	7 — the Valve of deduction of pressure (PHV) 8 — the Cable of drive PHV 9 — the Brake mechanism of a forward wheel 10 — the Brake mechanism of a back wheel 11 — the Module of management/hydromodulator ABS

Design of the valve of deduction of pressure (PHV)


1 — the Case 2 — the Camshaft 3 — the Ball 4 — Directing a ball 5 — the Cuff 6 — Diafragmennaja a spring 7 — Zaglushka	8 — the Pusher 9 — the Returnable spring 10 — Pylnik 11 — the Cover 12 — the Executive lever 13 — Sealing rings 14 — the Sealing ring

Presence on the car противооткатной system does not release the driver from necessity of use of a foot and lay brake at stops on sites of road going uphill!

The protivootkatnaja system facilitates procedure трогания the car standing on lifting, providing smoothness of a start of motion even at vehicle management of the not skilled driver.

The organisation scheme противооткатной systems is presented on an illustration.

At a certain steepness of lifting when the driver at the squeezed out coupling starts to release a pedal of a foot brake противооткатная system continues to keep pressure in brake contours, preventing откатывание the car back that allows the driver to set a vehicle in motion in a usual manner, without caring of keeping by its brakes.

The valve of deduction of pressure (PHV)

The special valve of deduction of pressure is included in a line connecting ГТЦ with the hydromodulator of antiblocking system (ABS) (PHV). The valve is equipped by the camshaft rotating in both directions at turn of coupling connected to a pedal of the executive lever.

At the switched off coupling (the pedal is squeezed out) the valve pusher is wrung out by a spring to the right.

Deployment of the clown of a camshaft at release results coupling pedals отжиманию a pusher to the left with overcoming of the effort developed by a returnable spring. More to the left of a pusher rod in the directing channel equipped with a saddle клапанной assemblages the ball is located. When the car occupies horizontal position, or is inclined forward, the ball is in the left (forward) end of the directing channel. At entrance on lifting, a ball under the influence of gravitation it is rolled away back, nestling on a saddle until the coupling pedal will not be released also a pusher rod will not be displaced to the left.

During a stop on lifting the driver keeps squeezed out both pedals (a foot brake and coupling), thus a ball in the directing channel occupies extreme right position, nestling on a saddle of the valve and blocking a stream of a hydraulic liquid to the main cylinder. Before a start of motion the driver releases a pedal of a foot brake, continuing to keep a pedal of coupling squeezed out, however pressure brake contours continues to remain for the account отсекания their ball valve. Further the driver can start to release coupling with simultaneous squeezing of gas as does it at a start of motion on equal road, - camshaft rotation will lead to opening of valve PHV and отпусканию brakes.

It is necessary to remember that activation противооткатной systems occurs only at the squeezed out pedal of coupling.

Repeated squeezing of a pedal of coupling after partial it отпускания (for example, at refusal of attempt of a start of motion or transfer switching on lower) will not provide return PHV to a closed condition, - for реактивации systems it is necessary to squeeze out a pedal of a foot brake again! It is necessary to have also in view of that the effect of braking remains at release couplings after movement of the car by a backing at the squeezed out both pedals. The start of motion a forward course after movement by back can be accompanied by easy jerk.

On the main page