Eberhardts Tire And Automotive Jobs Not Saved or Created by Tariff, TIA Says

Eberhardt’s Tire & Automotive is your complete auto repair specialist. Call us for any need. We are here to service your vehicle with the up most care and concern.

Eberhardt’s Tire & Automotive

2335 E Orangethorpe Ave.

Fullerton Ca. 92831

1-714-871-9810

http://www.etires4less.com/

eberhardtstire@hotmail.com

Jobs Not Saved or Created by Tariff, TIA Says

 The just-expired Section 421 tariff on imported China-produced consumer tires failed to save or add new tire worker jobs, TIA said in a statement issued Sept. 27.

At the same time, TIA said that its favors "free and open markets with level playing fields."

In its statement, TIA pointed to a report by the Peterson Institute for International Economics that claimed, “approximately 1,200 American jobs were saved as a result of the Chinese tire tariffs,” but, in fact, the tariff action by the Obama Administration “mostly benefited other tire exporting countries first and American manufacturers second.”

TIA reminded that at the time the Section 421 tariff schedule took effect in September 2009, executive vice president Roy Littlefield said, “The tire manufacturers made the decision years ago to shift production of these lower-cost tires out of the U.S. All this action will do is force the tire manufacturers to shift production of these lower-cost tires to other countries.”

That is exactly what happened, TIA said.

The association noted the recent call by the Administration for the World Trade Organization to investigate claims that the Chinese government was illegally supporting automakers and auto part companies exporting products to the U.S., and that “these companies received $1 billion in subsidies between 2009 and 2011.”

“Although this is a different animal from the Chinese tire tariff…it is a continuation of the on-going efforts of integrating the Asian giant into the world market,” TIA said. “This is happening by the fact that China is using the WTO to resolve disputes between itself and the U.S. In fact, the Chinese have submitted a countersuit to the WTO because of the Administration’s actions.”

“It is good that the Chinese government is using the WTO,” said Littlefield. “It is the proper mechanism for resolving such disagreements and they are establishing a good track record of complying with the WTO’s findings." 

 

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Eberhardts Tire And Automotive A New Breed of Load Sensing Shocks

Eberhardt’s Tire & Automotive is your complete auto repair specialist. Call us for any need. We are here to service your vehicle with the up most care and concern.

Eberhardt’s Tire & Automotive

2335 E Orangethorpe Ave.

Fullerton Ca. 92831

1-714-871-9810

http://www.etires4less.com/

eberhardtstire@hotmail.com

A New Breed of Load Sensing Shocks

 

The Nivomat shock absorber is a self-leveling monotube shock absorber developed by Sachs. Nivomat is a contraction of two French words, niveau and automatique, that when translated to English would be "level automatic" or "automatic level."

The Nivomat is like an ordinary monotube shock absorber with a hydraulic piston, tube and accumulator. There are two different configurations of the shock: diaphragm type (shown above as the left unit of each pair) and piston type (right).

Nivomat shocks are used by Chrysler, Ford, General Motors, Jaguar, Kia, Mitsubishi, Saab and Volvo, among other OEMs. The system is also available on the GM Suburban and Tahoe as part of ZW7 Premium Smooth Ride Suspension.

Replacement units are available from Monroe, ZF Sachs and OE suppliers.

The system makes use of the mechanical energy generated during the first meters of driving from the relative movement between the axle and vehicle body.

An unlevel vehicle can create many problems. Extra weight on the rear axle shifts the center of gravity, which has a major impact on ride characteristics. In critical situations, the vehicle can be very difficult to control. Under these conditions, a “floaty” ride characteristic cannot be considered as comfort anymore.

Other effects are increasing expenses: The tires wear unevenly and faster. Bad aerodynamics causes a higher fuel consumption. Greater strain is also placed on the axle.

In place of conventional shock absorbers, this unique system is installed on the rear axle. While providing additional roll stability without requiring any additional electronics, the Nivomat adjusts the vehicle to the optimum ride height for every load condition, thus ensuring a safe and comfortable ride.

The Nivomat system does more than just level the vehicle under load. As the load increases, the pressure inside the shock increases as oil is displaced from the reservoir to the inside of the unit, compressing the gas volume. This creates a progressive increase in spring rate and damping with little or no change to ride frequency.

The Nivomat is like an ordinary monotube shock absorber with a hydraulic piston, tube and accumulator. There are two different configurations of the shock. The first looks like a conventional twin tube air shock with a dust cover. What appears as a dust cover houses the high pressure accumulator and low pressure oil reservoir. 

The second configuration has its high pressure accumulator at the top of the shock, reducing the overall diameter of the shock. This allows the shock to be installed in a more confined space, like an independent rear wheel drive suspension, and can be mounted in a shaft up or down configuration as designed by the manufacturer. The normal application for this shock absorber is for the rear suspension of a passenger car or SUV.

What gives the shock its leveling capability is a pump mechanism and oil reservoir that can increase the accumulator pressure, which increases the shock’s lifting capability. It is used in combination with springs matched to the load capacity of the shock to reduce suspension travel while utilizing more of the piston and shaft travel of the shock.

This maintains the ride quality whether the vehicle is operated with a driver only or to compensate for passengers and luggage. The big advantage to the Nivomat is the shock absorber requires no plumbing, compressor and height sensing device to level the vehicle. The normal movement of the suspension over a regular road surface provides enough pumping action to level the vehicle.

Leveling Components

As the load increases, the pressure inside the shock increases as oil is displaced from the reservoir to the inside of the unit, compressing the gas volume. This creates a progressive increase in spring rate and damping with little or no change to ride frequency.

The accumulator can be a diaphragm or piston. The normal pressure contained in the accumulator ranges from 20 bar (290 psi) to 50 bar (725 psi). The pump can increase the accumulator pressure from 90 bar (1,305 psi) to 130 bar (1,885 psi). Under driving conditions, pressure can reach 350 bar (4,424 psi).

The control sleeve is fixed in the shaft and controls oil flow through the spiral cut and release bore in the pump rod. The inlet valve is a one-way check valve located at the end of the spiral cut in the hollow pump rod.

The low pressure oil reservoir contains the oil used to charge the pump mechanism. The pump is located at the end of the control sleeve and uses a pump cup and balance spring.

Leveling Operation
The Nivomat shaft and piston provide the same damping as a normal monotube shock, the difference being that the shaft is hollow and contains the pump mechanism. The pump is operated by the displacement of oil caused by the movement of the shaft in and out of the shock. When the piston shaft moves out of the shock, oil is drawn from the low pressure oil reservoir through the hollow pump rod and inlet valve into the pump chamber.

Since Nivomat is mechanical, the vehicle needs to be moving before the pump starts to work; it takes about a mile to a mile and a half of travel before the vehicle reaches its optimal level point.

When the piston shaft moves into the shock, the oil is compressed, collapsing the pump spring and expanding the balance spring to fill the pump cup. When the shaft moves out of the shock, the control sleeve opens the spiral cut in the pump rod, and the oil is forced into the main chamber of the shock. The pump and balance spring return the pump cup to its level position. This increases the pressure in the accumulator, creating more lift to return the piston and shaft to the level position. In the level position, the control sleeve closes the spiral cut and the shock operates normally until the next inlet and pump action.

The release bore is used to return the shock to the level position when the load is removed from the vehicle. When the shaft and control sleeve is extended out of the shock past the release bore, the oil that was pumped to increase the accumulator pressure and lift is returned to the low pressure reservoir.

Installation
When replacing a load leveling shock absorber, it is necessary to inspect both mounting points for damage and stress cracks. All mounting hardware should also be replaced. All fasteners should be tightened to their proper torque specifications.

The diameter of a conventional shock absorber is 54 mm (2-1/8 inch). The diameter of a Nivomat shock can range from 60 mm (2-5/8 inch) to 72 mm (2-7/8 inch). Make sure the shock is properly mounted to provide adequate clearance. It is recommended to test the operation of the shocks by loading and driving the vehicle.

Disposal
Take the following steps, making sure to comply with local safety and environmental protection regulations to recover and dispose of the oil before scrapping the shock.

Diaphragm Type (except Mercedes Benz M Class):
1. Clamp the shock in a horizontal position using a vice with the shaft fully extended.
2. Center punch a mark 50 mm (2 inches) from the top of the tube.
3. Drill a 5 mm (3/16 inch) hole to exhaust the gas and oil from the low pressure reservoir.
4. Center punch a mark 25 mm (1 inch) from the bottom of the shock’s tube.
5. Drill a 5mm (3/16 inch) hole to exhaust the gas from the high pressure accumulator.
6. Remove the remaining oil in the shock by pumping the shaft in and out of the tube.
7. The shock can now be scrapped.

Piston Type (Mercedes Benz M Class):
1. Clamp the shock in a horizontal position using a vice with the shaft fully extended.
2. Center punch a mark 50 mm (2 inches) from the bottom of the tube.
3. Drill a 5 mm (3/16 inch) hole to exhaust the gas and oil from the low pressure reservoir.
4. Center punch a mark 10mm (3/8 inch) from the top of the tube.
5. Drill a 5 mm (3/16 inch) hole to exhaust the gas from the high pressure accumulator.
6. Remove the remaining oil by pumping the shaft in and out of the tube.
7. The shock can now be scrapped.

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