What is automobile CVTCS?

status

CVTC/CVTCS is an engine technology, such as VVTI engine, CVVT engine, VVT engine and VTEC engine. The power and fuel economy of the engine can be improved by adjusting the valve closing timing and the length of the intake and exhaust manifold according to the different working conditions of the engine.

Advantages: 1, strong power; 2. Economic fuel consumption; 3. Improve environmental protection indicators;

Disadvantages: 1, the engine relies too much on electronic technology; 2. The fuel label requirements are improved.

characteristic

(1) The system can continuously adjust the valve timing, but not the valve lift. Its working principle is that when the engine changes from low speed to high speed, the electronic computer automatically presses the engine oil to the small turbine in the driving gear of the intake camshaft, and the small turbine rotates at a certain angle relative to the gear box under pressure, so that the camshaft rotates forward or backward within 60 degrees, thus changing the opening time of the intake valve and achieving the purpose of continuously adjusting the valve timing.

(2) Optimize the valve timing by adjusting the camshaft angle, so as to improve the power and fuel economy of the engine in all speed ranges and reduce the exhaust emissions.

(3) Composition: sensor, ECU, camshaft hydraulic control valve and controller.

The control module stores the optimal valve timing parameters in advance. During operation, the "signals" of intake manifold air pressure, water temperature, throttle position, camshaft position and crankshaft position sensor are collected and compared, and the correction parameters are calculated and sent to the hydraulic control valve for controlling camshaft timing. The control valve changes the hydraulic flow and the optimal fuel injection timing or quantity according to ECU instructions (signal instructions such as advance, lag and constant).