Therefore, the air force [F.sub.a] is proportional to the area of the cylinder and air pressure [P.sub.a] determined by the control SDRE, given by where [P.sub.a] is the nonconservative pressure which generates the force [F.sub.a] of the air that excites the movement of the system with d being the cylinder diameter of the compressed air engine
The first phase of this programme -- proof of the technical concept in Tata Motors vehicles -- has now been successfully completed with the compressed air engine
concept having been demonstrated in two Tata Motors vehicles.
Our ideas ranged from a heat exchanger - in which heat from one liquid would be transferred to another - to a hot air engine
. We gave our suggestions to the engineers and were able to use the information they gave us to forma final solution.
With support from Shell and inspiration from air-powered car concepts in Europe, the project aimed to develop a compressed air engine
that would power a vehicle: Like gas-powered engines, the trick is to produce force on turbines, but to do so without creating emissions.
The group, which has around 400 staff at its air engine
part factory in Sunderland, posted underlying pre-tax profits of pounds 410m for the first half of 2008 - 8% ahead of last year and slightly ahead of City forecasts.
The car is a hybrid vehicle driven by a compressed air engine
combined with an electric motor.
The Energine company has created its PHEV (Pneumatic-Hybrid Electric Vehicle) that uses a two-stroke compressed air engine
for start, acceleration, and uphill climbs.
Meanwhile future of air engine
makers Rolls Royce was hanging in the balance, eventually surviving by a restructuring plan.
With new stringent EPA air quality standards in full effect beginning in 2004, Nissan has once again taken the leadership position in clean air engine
technology by becoming the first lift truck manufacturer to receive compliance status with their new Electronic Concentrated Control System on all new Nissan K21 and K25, gasoline, LPG, and dual fuel industrial engines.
Instead, the taxis will feature a compressed air engine
designed by French inventor, Guy Negre, and his company, Motor Development International (MDI).
(During his career, he also invented a washing machine, a compressed air engine
, and clarified gelatin, or jello.) Then he went into the business of manufacturing machines to shear cloth.
It will be available with a choice of an entry-level 1.2-litre four-cylinder engine that produces 69hp and a two-cylinder 0.9-litre Twin Air engine
that generates 85bhp, and a 95bhp 1.3-litre four-cylinder turbodiesel unit.