Term used to indicate an external drive compressor. Not hermetic.
Open cradle frame:
A motorcycle frame without tubes running under the engine. The engine unit bolts into place between the front downtube and the swingarm pivot area as a semi-stressed or stressed member
Open-deck design:
A design in which there is no metal at the cylinder head joint face between the cylinder walls and the outer block
Open differential:
Common to all conventional motor vehicles, performing the basic drive axle differential function. Unlike a limited-slip or locked differential, an open differential is unable to compensate for traction distinctions from one side of the vehicle to the other, and will thus spin the wheel with the least available grip.
Open display case:
Commercial refrigerator designed to maintain its contents at refrigerating temperatures even though the contents are in an open case.
Open drip-proof enclosure:
An electric motor housing with normal insulation treatment which consists of one
or more dips and bakes of varnish. The insulation system is composed of materials
which will not absorb or retain moisture. See enclosure
(OP) An electric motor housing with ventilation openings in the end shields
and/or shell to permit passage of cooling air over and around the windings.
The locations of the openings not restricted. It is for use indoors, in fairly
clean locations. See enclosure.
With an open-end lease, there is still a residual value set at the beginning of the lease. However, if the car is worth less than the residual value at the lease's end, the lessee must pay the difference. In other words, the lessee assumes the risk for depreciation with an open-end lease.
An operating condition or mode based on programmed instructions and not modified by a feedback system
A predetermined operating condition not based on exhaust gas conditions.
Open-loop:
Without feedback from e.g., oxygen-sensor control systems
Open-loop catalytic converter:
A preset converter which does not use an oxygen-sensor control system and thus operates without feedback. The opposite is computer-controlled catalytic converter. Certain engine management systems deactivate emission control systems (such as EGR and/or oxygen sensor control) under certain operating conditions (e.g., full-throttle driving); i.e., the electronic control module operates in the open-loop mode
Open-loop fuel control:
A non-feedback mode of operation which a feedback system resorts to when the engine is started while it is still cold. During this period, the oxygen sensor isn't yet able to supply reliable data to the computer for controlling the air/fuel mix ratio because the engine isn't yet warmed up. So mix control is handled by a program stored in computer memory
Open loop mode:
Mode in which the computer operates without feedback from the oxygen sensor while the engine is in the cold running condition
Open loop system:
A control system which operates by feeding in instructions at the beginning of a process and they are followed to complete the process.
Term for a crankcase emissions control system which vents to the atmosphere
An anti-lock brake system in which the brake fluid released from the brakes during an ABS stop is not returned to the brake during the ABS stop but is stored in an accumulator
The costs of running a vehicle. It includes insurance premiums, tax, depreciation, fuel, oil, maintenance, repairs, etc.; usually expressed in dollars per mile or kilometer
Operating piston:
A piston in an automatic transmission which causes its respective clutch(es), band, or multi-disc brakes to be applied by converting fluid pressure into mechanical force and movement
Operating pressure:
Actual pressure at which the system works under normal conditions. This pressure may be positive or negative (vacuum).
Pressure at which a system is operating.
Operating profit:
Pre-tax earnings after deducting all operating expenses from gross margin.
A check of temperature, pressure, and other conditions under controlled circumstances to determine whether an air conditioner or some other system is operating optimally
Opera window:
A small window on the rear quarter panel. It is usually circular.
Opportunity cost:
The cost of what you didn't do. For instance, if you have the cash to buy a car, the opportunity cost of the purchase is the interest lost on the cash you used for the car. One of the often-cited advantages of leasing is that it frees up your money to invest elsewhere.
The act of turning the wheels to avoid a skid by steering in the opposite direction to which the vehicle is going. If the tail of the vehicle swings out to the left in a skid, you should correct the problem by turning the steering fully to the left. Some people express it by saying, steer in the direction of a rear-wheel skid. Others say, counter steer to straighten out the vehicle. If you have never experienced a skid, you might consider taking a course designed to give you the skill. Otherwise, practice in an unoccupied snow-covered parking lot.
Any equipment or feature of a new vehicle which is not included in the basic price and is provided only if the purchaser requests it. Also see extras. The opposite is standard equipment
Options:
Extra features which may be purchased or may be included in the normally standard list of features and appointments of a vehicle.
A model of automobile manufactured by General Motors in Europe
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