The interaction of the combustion and intake valve
phasing on torque and combustor cylinder specific fuel combustion was studied by varying the valve and injection timings, keeping the start of combustion phased to the point of intake valve
closure (Figure 6).
Prior to each test, the mass of each intake valve
was recorded and fuel injector spray patterns were visually evaluated for spray pattern consistency.
The intake valve
closing at low speeds is not of great importance; thus it is a low setting, but as the speed gets higher we need more time for the valve closing to achieve optimal power.
At this point, the outflow valve is close and the intake valve
In addition, the intake valve
detergent additives in autogas, which cause combustion chamber deposits in cars, are particularly detrimental when they get in the oil.
At 4,950 rpm, the powertrain control module opens an electric spool valve routing pressutized oil to small pistons in the intake valve
That's despite two key disadvantages: the flow of air and fuel tends to stack up behind the intake valve
, requiring elaborate fixes such as a turbocharger to force the flow past the bottleneck; and optimizing the valve's opening and closing for low speed operation means less efficiency at high speed, and vice versa.
When it reaches a pre-set level, the float arm (f) closes the intake valve
, and the resupply stops.
An intake valve
lift sweep on 3 valve lifts - 100%, 75% and 50% lift.
The number six intake valve
lifter broke apart in flight, damaging the case and number five and six cylinders and pistons, causing metal contamination of the oil system.
Spanair said it did not know the cause of the disaster but the aircraft had an overheated air intake valve
before a first attempt at take-off.
Tokyo, Japan, June 12, 2007 - (JCN Newswire) - Toyota Motor Corporation announced today that it has developed Valvematic*, a variable valve lift mechanism created through combining VVT-i (Variable Valve Timing-intelligent), which continuously controls intake valve
opening/closing timing, with a new mechanism that continuously controls the intake valve