Valeo, France, exhibited the solenoid valve mechanism "Smart Valve Actuation (SVA)" at the Tokyo Motor Show. Instead of using a cam when opening and closing the valve, it is controlled by an electromagnetic actuator. In addition to optimal control of the valve opening and closing timing and valve opening time according to the number of engine revolutions, it is also easy to achieve cylinder intermittent functions, etc., so that fuel consumption and exhaust gas purification performance can be improved by 20%, and when rotating at low speed The torque is increased by about 15-20%. ;
At present, Valeo is developing two kinds of electromagnetic valves, one is "Full Camless" which can eliminate the suction and exhaust cam at the same time, and the other is "Half Camless" which only saves the suction cam. In addition to the use of two electromagnets used to open and close the valve instead of the omitted cam, and the addition of armatures and sensors and other components, the weight of the double solenoid valve mechanism exhibited this time reached about 1.8kg. In addition, a control unit with a 32-bit processor is required. ;
The company has jointly developed SVA institutions with a number of car manufacturers, and plans to start mass production in 2009.
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