Check cardinality (traction) as the engine
As depreciation or even minor details of the engine
gradually decreasing its effective power increases
blow-by through the piston rings and falls komppressiya in the cylinders.
The technical condition of the engine test engine,
efficiency, flow rate (intoxication) oil, the amount of compression
in the cylinders of the engine and the noise in his work.
Check cardinality (traction) as the engine b>
Reduction of the effective engine power is accompanied by
deterioration of the dynamic properties of a car that is decrease
maximum speed and acceleration dynamics. In connection
with this definition of the maximum vehicle speed and
time of passage of their 1 km from the place is a necessary
indicator for assessing the technical condition of the engine.
Before the tests are given in good order of the chassis
vehicle (toe and slay, the pressure
air in the tires, adjust brakes, etc.)
Roadworthiness test is determined by way of its
free rolling (coasting).
The test car spend a load of two people, including
driver, on a horizontal straight section of road with a solid
and smooth surfaces (asphalt, concrete) in dry weather and when
absence of a strong wind. All measurements were carried out at the races
car in two opposite directions,
closed glass doors closed and the ventilation hatch in the front end
Free rolling path (ramp-down) the car is set to
steady speed of 50 km \ hour to a full stop at two
races in opposite directions.
For driving in the fast mode, run-off clutch
and immediately put the gear lever in neutral position.
Coasting technically serviceable vehicle must
not less than 420 m.
The maximum speed the car is in top gear
dimensional section of a 1 km long. Acceleration should be sufficient
at the time of departure to the established dimensional plot
(Maximum) speed. The passage of car-dimensional
area is determined by a stopwatch, turning on and off by
made at the time of passage of the vehicle kilometer posts
beginning and end of dimensional plot. For
maximum vehicle speed of the arithmetic mean
velocity values ??obtained pridvuh races in one
Before each check the oil temperature in the crankcase
should not be below 80 * C and above 95 * C, and the temperature of the cooling
fluid in the cooling system does noxtexceed 80 * C. As a
Fuel may be gasoline used, the recommended guidelines for
of operation. Vehicle speed, km \ h, is determined
by the formula: Vmax = 3600 * S / T, where T - time passing kilometer
dimensional plot with; S - 1 km section of highway.
The passage of 1 km from the place of the serial shift
transmission is determined under the same as in the previous case, the conditions
test (motor thermal state, the load
in the car, etc.) by passing car-dimensional plot
length of 1 km. Car (with the appropriate
skills of the driver for this test) dispersed enerogichnym touch
on the throttle pedal. Transmission
switch quickly when reaching speeds: on the first transfer-
30-40 km \ hour in second gear - 60-70 km \ h on
third gear-90-100 km \ hour.
If the test maximum speed will be at least
140 km \ h (* for motor 412) and 115 km \ h (for the engine 42DE)
and the passage of a mile from the site is no more
40 (engine 412) and 48 s (for motor 412DE), this means
that engine power is quite sufficient, and it is suitable
for further exploitation.
Reducing the maximum speed for 10-15% of normal and increased
travel time 1 km from the place of 20-25% with good technical
the mechanisms for undercarriage vehicle chassis
indicates a lack of engine power and the need for
more detailed inspection of the engine and
identify the causes of the decrease in power.