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What is the function of load sensing proportioning valve?
Maruti Super Carry is equipped with Load Sensing Proportioning Valve (LSPV) braking system that allows better stability during braking along with the front disc and rear drum brakes.
What does a brake valve do?
Definition & Description. A Brake Proportioning Valve is commonly found on vehicles with front disc and rear drum brakes. It is a safety valve that restricts flow to the rear brakes during a “panic stop.” This prevents the rear wheels from locking up before the front wheels.
What do load sensing valves do?
The load sensing valve (L.S.V.) serves the purpose of automatically adapting the brake pressure and therefore the brake force according to the load of the vehicle.
What problems can a bad proportioning valve cause?
A faulty brake proportioning valve could increase your vehicle’s braking distance, as it might reduce the pressure from the rear brakes too much. Note that the symptoms of a bad brake proportioning valve may also point to damage to other components, such as the rear brake circuit, brake caliper, or wheel cylinder.
How do you test a brake load sensing valve?
How do you test a load sensing valve?
- Load sensing spring length check (Refer to ).
- Remove the bleeder from the front disk brake calliper and rear drum brake cylinder, and connect a pressure gauge.
- Air bleeding (Refer to ).
- Unhook the spring support side.
How does a brake proportioning valve work?
The proportioning valve reduces the pressure to the rear brakes. If equal braking force were applied to all four wheels during a stop, the rear wheels would lock-up before the front wheels. The proportioning valve only lets a portion of the amount of pressure to the rear wheels thus preventing rear wheel lock-up.
Do I need brake proportioning valve?
The function of a proportioning valve is to supply the proper amount of fluid pressure to the front and rear brakes to make the vehicle stop quickly and safely. For these reasons, a brake proportioning valve is always required in automotive brake systems.
What advantage does a load sensing system have?
This is sometimes referred to as “sensitive load-sensing”. Because the variable pump produces the flow demanded only by the actuators, load-sensing control is energy efficient (fewer losses to heat) – which may result in lower oil oxidation rates and longer fluid life, and improves actuator control.
What is load sensing proportioning valve for brake system?
A load sensing proportioning valve system for the hydraulic brake system of passenger cars and the like for varying the amount of brake fluid pressure and thus the braking torque at the rear brakes of a passenger car.
What is a load sensing valve used for?
It detects ,by way of a connecting rod; the weight or downward movement of a vehicle caused by a heavy load and allows more brake fluid/air/pressure to be applied to the rear brakes. As a vehicle moves forward, the front brakes do most of the work.
Where are the brake proportioning valves located on a car?
Master Cylinder-Mounted: These valves are located directly on the cylinder and attached to fluid ports located between the cylinder and brake lines. Load Sensing: These valves are located directly on the frame at the rear end of the vehicle, with a lever attaching it to the suspension system.
Why do my rear brakes lock up during deceleration?
Your rear brakes may receive too much pressure during rapid deceleration if the proportioning valve is not functional. A properly-working proportioning valve ensures your rear brakes do not lock-up during heavy braking. This is crucial in any car, but especially in pickup trucks with light backends.