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Engine Technology
Piston Engines
Combustion Engine 1
Combustion Engine 2
Combustion Engine 3
Combustion Engine 4
Combustion Engine 5
Combustion Engine 6
Combustion Engine 7
Combustion Engine 8
Combustion Engine 9

Four-stroke Engine
Intake Stroke
Compression Stroke
Combustion Stroke
Exhaust Stroke
Save energy
Compl. dismanteled
Aggregate states
p-V Diagram 1
p-V Diagram 2
Fish Hook Curve Diagram
Decel. Fuel Shut-off
Equaliser Shafts 1
Equaliser Shafts 2
Inertial forces + -torques
Int. Combustion Engine
Petrol Engine
Diesel Engine
Alternative Engines
Classic 5-cyl. Engine
Classic V8-Engine
6-cyl. Opposed Engine
6-cyl. Opposed Turbo
V8 Turbo Engine
W12 Engine
V8 Ferrari Engine
V12 Ferrari Engine
Formula-1 Engine (image)
Formula-1 Engine
Engine Suspension
Perf. Measurement 1
Perf. Measurement 2
Torque Model
Torque 1
Torque 2

Torque 3
Stroke-bore Ratio
Cubic Capacity
Power output p.l.

Diesel Engine 1
Diesel Engine 2
Diesel Engine 3
Diesel Engine 4

Combustion Engine 1
Combustion Engine 2
Combustion Engine 3
Combustion Engine 4

Piston Engine 1
Piston Engine 2
Piston Engine 3
Piston Engine 4
Piston Engine 5
Piston Engine 6
Piston Engine 7
Piston Engine 8
Piston Engine 9
Piston Engine 10

  Passive Engine Suspension

Special demands are made on the mountings of the transverse engine. In diesel engines they should absorb, through large-sized rubber insulators, the vibrations over the entire RPM range, and with petrol engines, during idling, but nevertheless, not allow the engine too much freedom of movement. For this reason, a further pendulum support or torque prop, mostly found up front in the center of the engine compartment, joins the two mountings found on the right of the engine, and on the left on the gearbox. It comes into play when the engine makes a movement opposite to the drive shaft rotation, e.g., when pulling off quickly (jack-rabbit-starting). Only then are more vibrations transfered. Afterwards, a space again exists in the torque prop. The engine is suspended solely by these two bearings (see figure).

Of course, also longitudinally mounted engines at least rubber mountings and possibly torque support arms. In the early days the automobile engine is still firmly connected to the chassis, in motorcycles and Formula One racing cars even part of it (picture above). Today the inner workings of an engine suspension is mostly beyond vulcanized rubber to metal materials. Single engine bearings connected via electrical or vacuum lines to a controlling system does not mean that it is an active engine bearing system. As long as it's about mitigating the effects of vibrations or noises, and not countersteering, motor bearings are considered passive.

It started with the hydraulic fluid, which was given into the rubber cavities in optimized amount during production process. Then was added a bypass between empty and filled spaces in which the damping could be adjusted by opening or closing. This could be controlled by engine management depending on engine and/or vehicle speed. High-torque engines generally have more often need for a more bearing control. Fuel is saved by such constructions, if thereby the idling speed of e.g. a V8 can be lowered to 500 rpm. 01/16