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Toyota Electric Power Steering (EPS)

Sunday, February 7th, 2010

Electric Power Steering (EPS) is replacing hydraulic power steering in many new vehicles today. epss

One of the advantages of electric power steering is that it eliminates the power steering pump, which can use as much as 8 to 10 horsepower under load. This improves fuel economy while also eliminating the weight and bulk of the power steering pump and hoses. Getting rid of the hydraulics also does away with fluid leaks and the need to check the power steering fluid. Electric power steering is also quieter than hydraulic systems because there is no pump noise and no fluid flowing through hoses and valves. But the most noticeable difference is in handling and steering refinement.

Electric power steering can be fine tuned with a precision that is hard to match with hydraulic controls. By monitoring the driver’s steering inputs, vehicle speed, and other suspension dynamics, the system can provide just the right amount of steering feel and effort to match rapidly changing driving conditions. EPS can deliver extra effort when you need it, and reduce steering effort when you do not need it. It can even provide steering assist when the engine is off.

Electric Power Steering can be found on the  new Avalon, Venza, Camry, Corolla,  Prius, RAV4, New Sienna, and Scions in the Toyota product line.
Though some of the older electric power steering systems were actually “electro-hydraulic,” and used an electric motor to drive a conventional hydraulic pump, the latest generation of EPS is all electric/electronic. The steering gear itself is a manual rack with an electric motor mounted on the steering column or the rack.

When the driver turns the wheel, a steering sensor detects the position and rate of rotation of the steering wheel. This information along with input from a steering torque sensor mounted in the steering shaft is fed to the power steering control module. Other inputs such as vehicle speed and inputs from the traction control or stability control systems are factored in to determine how much steering assist is required. The control module then commands the motor to rotate a certain amount, and a sensor on the motor provides feedback to the control module so it can monitor the motor’s position.

Better yet, because an EPS system is software driven, it is possible to tap into the steering module and modify steering effort and feel. This can be done with a factory scan tool on some applications, and with aftermarket “tuner” scan tools and software.



Tuesday, March 24th, 2009

Scion Owners Behave!!… A study by ISO Quality Planning identified the 10 most ticketed vehicles and the 10 least ticketed. The study puts the Hummer H2 and H3 at the top of the list, followed closely by and get this the Scion tC and two other Scion models, the xB and xA.

What are 3 Scion Models, a Toyota Matrix, and a Solara doing on a top 10 ticket list??… Analysis helps make this more explainable.

Scion tc and the other models including the Toyotas have an average customer age of 25 years old;… and with plenty of aftermarket performance accessories available out there, Scion and Matrix demographics skew to the early 30s (still feeling fearless) according to parent company, Toyota. That popularity with youthful drivers, who typically translate into a higher incidence of violations helps explain Scion and Toyota’s new notoriety.

A couple of Mercedes-Benz AMG models, the CLK63 and CLS63 also make the list, which shouldn’t come as a surprise. The 10 least ticketed cars include a healthy dose of minivans and trucks.

Most ticketed Rate                                 Least ticketed Rate
Hummer H2/H3 463%                             Jaguar XJ 11%
Scion tC 460%                                          Chevrolet Suburban 16%
Scion XB 403%                                         Chevrolet Tahoe 21%
Mercedes Benz CLK63 AMG 397%           Chevrolet 3500/2500 28%
Toyota Solara Coupe 306%                      Buick Park Avenue 32%
Mercedes Benz CLS63 AMG 276%           Mazda6 34%
Scion xA 275%                                         Buick Rainier 37%
Subaru Outback 266%                              Buick Lucerne 40%
Toyota Matrix 264%                                 GMC C1500 pickup 40%

*Violations per 100,000 miles driven, expressed as percentage of average.

The study doesn’t specify what kinds of traffic tickets, so there’s no telling if Hummers or Scions are more likely to speed or run red lights, but you could probably make some reasonable guesses. I would say Scion Owners Behave!!

The above aside, Scion and Toyota are the Highest Rated Cars you can buy for Quality, Reliability, and Longevity. And you can buy any of them with an Exclusive Lifetime Warranty. For more information, Inquire Below: