Abstract: The present invention provides an improved fuel tank isolation valve (10). In particular, the invention is directed to provide an improved fuel tank isolation valve (10) which is normally open for one time delivery condition of the valve to enable refuelling function at the time of vehicle assembly. Said valve (10) comprises of a valve housing (1) and a solenoid housing (2), wherein the solenoid housing (2) includes one latch assembly that locks the moving core (12) in radial or axial direction to provide an intermediate latching position for single operation.

Abstract: The improved fuel tank isolation valve (100) with separate springs and path of over relief, comprising of fuel tank valve with a canister port (9) and a tank port (8), a seal sub assembly (5), a seal (3) for over pressure relief (OPR), a spring (1) for over vacuum relief (OVR), a spring (4) for over pressure relief (OPR), solenoid (10), moving core (11), wherein the improved fuel tank isolation valve (100) has a separate section or separate chamber (14) for the seal (3) for over pressure relief (OPR), the spring (1) and the spring (4) to meet the technical requirement of spring within less tolerances that also reduce rejection in production line and reduce magnetic force from solenoid (10) to open the path in refuelling condition which results in high accuracy and the seal sub assembly (5) includes a sealing (6) for refuelling function.

Abstract: The present invention provides an improved fuel tank isolation valve (10). In particular, the invention is directed to provide an improved fuel tank isolation valve (10) which is normally open for one time delivery condition of the valve to enable refuelling function at the time of vehicle assembly. Said valve (10) comprises of a valve housing (1) and a solenoid housing (2), wherein the solenoid housing (2) includes one latch assembly that locks the moving core (12) in radial or axial direction to provide an intermediate latching position for single operation.

Abstract: A solenoid based air ventilation valve (24) comprises of a housing (1), a solenoid coil (2), a flexible diaphragm (6), a plunger (8), a filter inlet (28) and a filter outlet assembly (100). The flexible diaphragm (6) is over molded with the plunger (8) to seal the flexible diaphragm (6) against the high pressure during closed position and has an incorporated O-ring (102) with flexible diaphragm (6) to stop the leakage from the valve (24). The filter outer assembly (100) is fixed to the inlet (25) and outlet port (26) to prevent suspended contamination particles in the valve (24). The valve (24) has a press fitted metal insert/flow controller (55) to achieve a low flow rate. Further, the air ventilation valve (24) allows a low leakage limit, low flow rate to serve high opening and working pressure to work in both over pressure and under pressure (vacuum) conditions.

Abstract: A fuel tank isolation valve 10, wherein, the shaft 18 is assembled coaxially inside hole 42 of moving plunger 46 of seal sub assembly 16 and then flow limiter 22 is guided over the shaft 18 through guiding hole 34 to maintain sealing seat 36 in parallel with respect to the sealing surface 38 of rubber seal 44 and avoid misalignment of flow limiter 22 with respect to sealing surface 38 during and after the operation; the sealing seat 36 of flow limiter 22 on the sealing surface 38 of the rubber seal 44 fixed into moving plunger 46 of seal sub assembly 16 performs the over pressure relief function; the sealing surface 40 of rubber seal 44 fixed into moving plunger 46 of seal sub-assembly 16 is resting on surface 48 of nozzle body 20 to perform over vacuum relief function; and the rubber seal 44 assist both over pressure relief (OPR) and over vacuum relief (OVR) function.

Abstract: A fuel tank isolation valve 10, wherein, the shaft 18 is assembled coaxially inside hole 42 of moving plunger 46 of seal sub assembly 16 and then flow limiter 22 is guided over the shaft 18 through guiding hole 34 to maintain sealing seat 36 in parallel with respect to the sealing surface 38 of rubber seal 44 and avoid misalignment of flow limiter 22 with respect to sealing surface 38 during and after the operation; the sealing seat 36 of flow limiter 22 on the sealing surface 38 of the rubber seal 44 fixed into moving plunger 46 of seal sub assembly 16 performs the over pressure relief function; the sealing surface 40 of rubber seal 44 fixed into moving plunger 46 of seal sub-assembly 16 is resting on surface 48 of nozzle body 20 to perform over vacuum relief function; and the rubber seal 44 assist both over pressure relief (OPR) and over vacuum relief (OVR) function.