CPS, Cam Profile Switching..what??

Cam Profile Switching (CPS) technology has significant effect on drivability, exhaust emissions and fuel consumption. New legislative requirements for the exhaust gas emissions regulations imposed recently by the State of California and the Environmental Protection Agency demand the ability to conduct a continuous monitoring of the state of CPS (Cam Profile Switching System). This, in its turn, requires to have an effective diagnostic method for identification of the system failure. The valve lift event can not be directly measured and special diagnostic algorithms, based on indirect information about the valve lift, are required to identify a failure in the system.

Several methods which allow detecting the CPS state are known. The first one is based on the difference in the air charge inducted in the cylinders for different lifts. The inducted air charge measured by Manifold Air Flow (MAF) sensor is compared with the air charge model based on the measured position of the throttle flap, intake manifold pressure and engine speed. The CPS state is associated with the error between measured and modelled air charge,
The drawback of the method described in US 6213 068 is that the method does not allow the cylinder individual failure detection. It is furthermore not suitable for the detection of the failure of a one bank either due to the relatively small difference in volumetric efficiency for the case of a single Bank failure.

Another method is based on the combustion state monitoring using fluctuations of the engine speed. The method is based on the fact that the combustion state changes considerably during shifting, US 6 006 152. The invention uses the technique of the combustion state monitoring via irregularities of the engine speed. Irregularities are associated with the CPS state. The method allows the cylinder individual failure detection. The method uses the torque estimation technique which is well known in the literature devoted to the combustion efficiency monitoring functions.

Another group of methods proposes to associate the CPS state with the fluctuations of the intake manifold pressure signal. The closest invention which proposes to recover the intake valve timing information from the pressure signal is disclosed in the US 5495830. The method for control and monitoring of the check valves is described in US 5495830. Intake valve closing events which are determined via the pressure change allow to estimate an amount of the backflow into the intake runner where the check valve is controlled to minimize the backflow effect. To realize the algorithms proposed in the US 5495830 the pressure sensor is required in every intake passage which increases the cost of the system.

New Proton MPV

Proton is currently performing on-road tests of the new MPV and is either employing a well known disguise technique of using the body of another similiar vehicle to hide the underpinings of a car being tested, or is currently performing powertrain testing with a body of a similiar weight and size.

If you have a look at the photos, you will see that the interior features the Toyota Wish dashboard, but it has a Proton steering wheel। The interior seems to have a bad fit and finish - weird gaps here and there very atypical of a Toyota. Look at the area around the left-most air conditioning vent as well as the area where the dash meets the center tunnel which runs between the two front seats. The dash could be looking that way because it has been adapted to fit the Proton MPV’s interior. If you look closely, there’s nothing where the dash-mounted shift lever is supposed to be - in this mule’s engine bay is very likely a Proton powertrain and gearbox.

Poton MPV??It is real!!

Proton is currently performing on-road tests of the new MPV and is either employing a well known disguise technique of using the body of another similiar vehicle to hide the underpinings of a car being tested, or is currently performing powertrain testing with a body of a similiar weight and size.

If you have a look at the photos, you will see that the interior features the Toyota Wish dashboard, but it has a Proton steering wheel. The interior seems to have a bad fit and finish - weird gaps here and there very atypical of a Toyota. Look at the area around the left-most air conditioning vent as well as the area where the dash meets the center tunnel which runs between the two front seats. The dash could be looking that way because it has been adapted to fit the Proton MPV’s interior. If you look closely, there’s nothing where the dash-mounted shift lever is supposed to be - in this mule’s engine bay is very likely a Proton powertrain and gearbox.

Tuning

Tune-up is an old-fashioned maintenance term that's nearly non-existent today. With electronic ignition and fuel injection came the oxygen sensor and computers that took over control of engine settings. Early versions allowed for some adjusting, but today's engines require professional grade equipment and training. You can replace normal maintenance parts and still see improved engine performance. Here are common maintenance parts you can replace to dramatically increase performance and lessen the risk major problems, such as premature catalytic converter failure. Ignition Parts All spark plugs should be removed and checked every 30,000 miles and be changed at 60,000 miles. This prevents the plugs from seizing in the block, causing more expensive repairs in the future. Always note which plug came from which cylinder. This tells you if a particular cylinder has a problem. The distributor cap and the rotor usually, deteriorate with age and use. Cracks may develop, allowing moisture in. The metal contacts on both can then corrode, causing misfiring. These parts should be replaced at recommended time periods or if showing any excessive wear. Spark plug wires should be inspected for cracks and brittle coverings. These are not replaced as often as in the old days because of the improved materials being used in the wire itself. Engine, Fuel , & Air Filters Many experts believe that changing filters on a regular basis may have more to do with your car's long life than any other single factor. Oil filters are easy to replace and help prevent unnecessary engine wear. The job of the oil filter is to remove soot, rust particles and other solid contaminants from the oil. Oil filters should be replaced with engine oil every 3,000 miles. Air filters remove dirt by trapping particles as air passes through the filter media. They also protect the carburetor in older cars, preventing dirt from clogging the air bleeds and metering jets. They protect fuel injectors in later-model autos. Air filters should be replaced every 20,000 miles but more often if you live or drive in dusty areas. Any filter that looks heavily loaded should be replaced regardless of the number of miles. The PCV breather filter assures only clean, filtered air is drawn in through the air cleaner. A clogged breather filter prevents the PCV from siphoning away the blowby gases and moisture created by engine combustion, resulting in oil breakdown and sludge buildup. The PCV breather filter should be replaced every 30,000 miles. Fuel Filter eliminates contaminants that can get into your fuel system and can clog the injector inlet screens. In older cars, dirt can plug the carburetor's fuel metering orifices. If the fuel filter is not replaced regularly, fuel flow to the engine will become restricted, resulting in stalling, loss of high speed power and hard starting. The fuel filter should be replaced every 30,000 miles or whenever other fuel system parts are replaced. Automatic Transmission Filter will make sure that transmission fluid transmits energy and cools & lubricates the moving parts of the transmission. A clogged transmission filter can produce transmission slippage, engagement problems and hesitation. Experts recommend this filter be changed every 12,000-15,000 miles.