Variable valve timing (VVT) solenoid or oil control valve controls the oil flow according to the engine speed and load. VVT solenoid is a vital part of the variable valve timing system. Variable Intake Air Solenoid Valve,Variable Valve Timing Control,Vvt Timing Solenoid,Exhaust Timing Solenoid Wenzhou Zhongking Parts Co.,ltd , https://www.oemvvt.com
The Oil Control Valve (OCV) is a a critical part used in every engine that is fitted with variable valve technology (VVT). A single control valve will regulate the supply of oil to a designated VVT hub, to advance or retard the timing by altering the camshaft angle position. Controlled by the ECU, the OCV receives electrical signals, instructing it to adjust the oil flow as required, in accordance to current driving conditions.
The industrial development and application history of gallium , indium , antimony and antimony is short and the dosage is not large. Although some poisoning incidents have been discovered, their toxicity to environmental ecology and humans, as well as effective targeted control measures, still need further Research and identification.
The tolerances in the environment that have been proposed for 8h working days abroad are shown in the table, and China operates according to the “recommended standardsâ€.
Workplace air tolerance (mg/m 3 )
Ga
In
Tl
Ge
TlBr
TlI
GeO 2
GeCl 4
GeH 4
American standard
-
0.1-0.3
0.1
0.6-1.8
-
-
-
-
0.6
Former Soviet standard
2
0.01
2-5
0.01
0.01
2
1
-
Recommended standard
2
0.01
0.001
0.04
0.01
0.01
-
-
-
Domestic and foreign tolerances for gallium, indium, antimony, and antimony in drinking water and wastewater are not allowed to be reported except for the US containing Tl <10 mg/m 3 for wastewater.
The direction and distribution of the exploitation of thallium in thallium should track large reserves of Yunfu pyrite and Lanping lead zinc ore, prevention and proper utilization.