Mechanical Engineering

rack and pinion steering

rack and pinion steering gear with a shift movement is used not only on small and medium-sized passenger cars, but also on heavier and faster vehicles, such as the Audi A8 and Mercedes E and S Class, plus almost all new light van designs with independent front wheel suspension. The advantages over manual recirculating ball …

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steering system

On passenger cars, the driver must select the steering wheel system angle to keep deviation from the desired course low. However, there is no definite functional relationship between the turning angle of the steering wheel made by the driver and the change in driving direction, because the correlation of the following is not linear:  …

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front wheel drive

The engine, differential and gearbox form one unit, which can sit in front of, over, or behind the front axle. The design is very compact and, unlike the standard design, means that the vehicle can either be around 100–300 mm shorter, or the space for passengers and luggage can be larger. These are probably the …

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semi trailing arm suspension

semi trailing arm suspension is a special type of trailing-arm axle, which is fitted mainly in rear-wheel-and four-wheel-drive passenger cars, but which is also found on front-wheel-drive vehicles the control arm axis of rotation EG is diagonally positioned at an angle a ¼ 10–25, and from the rear an angle b  5 can still …

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mcpherson strut

The McPherson strut is a further development of double wishbone suspension. The upper transverse link is replaced by a pivot point on the wheel house panel, which takes the end of the piston rod and the coil spring. Forces from all directions are concentrated at this point and these cause bending stress in the piston …

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four wheel independent suspension

The chassis of a four wheel independent suspension car must be able to handle the engine power installed. Ever-improving acceleration, higher peak and cornering speeds, and deceleration lead to significantly increased requirements for safer chassis. Independent wheel suspensions follow this trend. Their main advantages are: little space requirement; a kinematic and/or elastokinematic toe-in change, tending …

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hybrid pickup truck

Mitsubishi have been prominent in hybrid pickup truck manufacture and have recently developed a heavier, municipal, version of the light hybrid truck launched in 1995. Because added cost limited market acceptance of the lighter, Canter-based, hybrid the decision to build a heavier municipal version, below Figure was taken on the grounds of low noise, and …

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cng electric hybrid vehicle

Smaller buses (cng electric hybrid vehicle) have been built with pure electric and alternative forms of hybrid drive. An interesting project by Unique Mobility in North America put a CN Gelectric hybrid system into a 25 ft (7.62 m), 24 passenger vehicle . Here the compactness and locational flexibility of the hybrid-drive elements meant that …

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fuel cell powered vehicles

GM and its Opel subsidiary had aimed at a compact fuel cell powered vehicles.By 2010, up to 10% of total sales are expected to be taken by this category.The efficiency of cells tested by the company is over 60% and CO2 emissions, produced during the reformation of methanol to obtain hydrogen, are about half that …

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