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If you’re driving a hybrid, some of the weird noises your hybrid makes may be leaving you wondering what's going on in there. Hybrids and electric cars under propulsion can be so quiet the National Highway Traffic Safety Administration has issued a proposal requiring them to come equipped with a device to make them more audible to pedestrians, especially visually impaired individuals. The braking function of your car is one of the few systems relying solely upon friction to do its job. Most hybrids use regenerative braking systems to create electricity and recharge the batteries whenever braking is applied. While most hybrids use continuously variable transmissions, a number of models do employ conventional automatic transmissions, and one (the Honda CR-Z) comes fitted with a manual transmission. If you hear knocking or clattering sounds, the problem can typically be traced to a low gasoline octane rating, a clogged air filter, or improper engine timing. Certain specifications, prices and equipment data have been provided under license from Chrome Data Solutions ("Chrome Data"). 40,000 bees found inside a bedroom wall gives the phrase “things were buzzing” a new meaning.
A Provo, Utah couple purchased their new home five months ago and lately while they were watching TV at night they could hear a buzzing coming from inside their bedroom wall.
Tyler Judd and his wife called a beekeeper for some help and he removed the 40,000 bees from the bedroom wall. Roz ZurkoHartford Top News ExaminerRoz Zurko is a freelance writer originally from Milford, Conn.
Yes, there is still an internal combustion engine, as well as a conventional suspension system, cooling system, and braking system (regenerative components aside).
According to the agency’s statistics, a hybrid vehicle in the process of executing a low speed maneuver (making a turn, slowing, stopping, backing up, entering or leaving a parking space, or starting in traffic), is considerably more likely to be involved in a collision with a pedestrian or a cyclist than an internal combustion engine vehicle. In most cases, automotive engineers seek to eliminate or minimize friction, as it is the enemy of motion—which is also why it works so well for the braking system. These typically work by causing the car’s electric motor to run backwards, which makes it generate electricity. In the Honda, if you hear grinding while shifting gears, there is a possibility the shift linkage needs adjustment, the clutch needs adjustment, or the clutch is worn and needs servicing. A constant whining noise from the transmission, along with a slipping of gears could be low transmission fluid. After all, aside from generating electricity to be stored in the battery pack, the gasoline engine functions largely the same in a hybrid as it does in a non-hybrid automobile.

Clicking noises can be attributed to out of adjustment valves, a lack of engine oil, or low oil pressure.
The 40,000 bees made up a colony that was not only making noise, but it was destroying the insulation in the wall, according to NBC News on May 13, 2013.
They've seen bees outside the house, but little did they know the colony of bees was sharing their home with them.
He told the Judds that the bees were causing a much bigger problem to their home besides building a hive. And, like conventional cars, some weird noises should be attended to rather than drowned out by your Taylor Swift download. Low speed maneuvers (defined as less than 18 miles per hour) are singled out because a vehicle’s tires make enough noise to be aurally discernable above that speed.
Because of friction, components of the braking system wear more frequently and more rapidly than others.
This slows the car in much the same fashion as downshifting a transmission uses the engine to slow a car.
The problem could also be traced to a low level of the hydraulic fluid a clutch needs to operate properly. The pulleys are engineered to vary in size as the speed of the vehicle increases or decreases. At start up, does the engine spin up readily and settle into a smooth idle, or do you hear coughing, sputtering, or other strange noises? Other sources of clicking sounds include collapsed valve lifters, stuck valves, or sludge in the engine’s lubrication system. The bees were sending swarms that were removing the insulation to further colonize the area inside the wall. Further, the braking system is more prone to generating audible sounds when problems exist.
Except, in this case, running the electric motor backwards also generates electricity, which is stored in the battery pack to provide energy the next time the electric motor is called upon to propel the vehicle. If you hear a chattering noise while the transmission is in neutral, the problem could be traced to a worn reverse idler gear, worn bearings, or worn gears.
If you hear a humming noise, it could be a malfunctioning transmission pump, or pump shaft. This simulates the changing of gear ratios, but it does so gradually in order to enable the engine to continually work at peak efficiency to maximize fuel economy.

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If you hear clunking noises when braking, the sound could be traced to damaged or missing components, or a brake caliper could be loose or improperly mounted. A mild chattering noise while the engine is idling and the transmission is in neutral, which goes away when you step on the clutch, could be the clutch throwout bearing.
Because of the way the CVT works, drivers accustomed to hearing gear changes as their car accelerates may find the engine noise caused by the functioning of the CVT to be disconcerting.
Other causes of this behavior include a dirty air filter, failing spark plugs or spark plug wires, a clogged fuel filter or catalytic converter, or water in your gasoline.
Hissing sounds can be attributed to a failing cooling system, which causes overheating and steam. Better to investigate while it’s intermittent and make the repair than wait for it to become consistent and take a few other components down with it.
However, regenerative braking systems can also produce a slight whining noise when they are applied. Worn manual transmission internal components can cause grinding noises during gear changes as well.
A loud clunking noise when the transmission is shifted from park generally indicates torque converter mount problems. An engine with a CVT revs to the required rpm when the throttle is applied and holds it until the desired speed is reached. Squeaking and squealing noises (particularly at idle) could be indicative of loose, worn, or slipping drive belts. Other squeals indicate worn brake pads and shoes, previously overheated pads, incorrectly mounted calipers, or the pads could simply be worn out and you’re hearing their wear indicators. This is because you can sometimes hear the electric motor running backwards as the system functions. This could make you think your engine is running too hard, or your transmission is broken because you don’t hear gear changes as you accelerate.
Rumbling, growling, or metal upon metal noises are generally indicative of problems with the gears inside the transmission.

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