Advanced Vehicle Technology Episode 3 Part 14 ppsx

... 594 Tractor and trailer skirting 632 Tractor skirt 632 , 633 Trailer body flow pressure distribution 621, 622 Trailer forebody edging fairings 631 Trailer skirt 632 , 633 Trailing vortex 596 Trailing ... wheels 30 4 Radial run-out 30 9 Static balance 30 2 Twitch 30 4 Wobble 30 4 Wheel and tyre run-out 30 9 Wheel bearing arrangements 404 Windage effect of ball or roller cage 1 93 Wi...

Ngày tải lên: 21/07/2014, 17:20

... 33 4 Roller 33 1, 33 2, 33 3 Roller carrier lobe 33 1, 33 2, 33 3 Rotor 33 1, 33 2, 33 3 Tapered leading and trailing (timing) groove 33 3 Transition groove 33 3 Quarter panel 2 Quick release valve 533 Racing ... (CTV) 149 ±155 Pump-roller type for power assisted steering Cam ring 33 3 Flow control orifice 33 3, 33 4 Flow control valve plunger 33 3 Drive shaft 33 1, 33 2,...

Ngày tải lên: 21/07/2014, 17:20

... possibly auxil- iary equipment for light, medium and heavy com- mercial vehicles ranges from about 150 cm 3 to 500 cm 3 , which is provided by either single or twin cylinder reciprocating compressor. ... passes air from the trailer reservoir to the brake actuators to stop the vehicle. 12 .3 Air operated power brake equipment 12 .3. 1 Air dryer (Bendix) (Fig. 12.7(a and b)) Generally, a...

Ngày tải lên: 21/07/2014, 17:20

... degψ 1.8 1.6 1.4 1.2 1.0 0 Drag coefficient ( ) C D 0102 030 Fig. 14. 58 Influence of yaw angle upon aerodynamic drag 625 Airstream Drag coefficient ( ) C D 0.8 0.7 0.6 0.5 0.4 3. 0 3. 2 3. 4 3. 6 3. 8 4.0 Low cab High cab Adjustable ... drag Over flow Side flow Fig. 14. 50 (a±d) Forebody coach streamlining 618 14. 8.7 Cab to trailer body gap seals (Fig. 14. 63 (a and b), 14. 64,...

Ngày tải lên: 21/07/2014, 17:20

... coefficient ( ) C D (a) (b) (c) ∝ ∝ 0 .32 0 .32 30 40 50 60 700 246810 0 .34 0 .34 0 .36 0 .36 0 .38 0 .38 0.40 0.40 Drag coefficient ( ) C D Dra g coefficient ( ) C D Fig. 14. 28 (a±c) Bonnet slope and windscreen ... ( ) C LW Fig. 14 .38 (a±c) Effect of underside ground clearance on both lift and drag coefficients 611 14. 5 .3 Partial enclosed wheel air flow pattern (Figs 14 .37...

Ngày tải lên: 21/07/2014, 17:20

... Fineness ratio (b/a) b a /3 a –Ve Fig. 14. 12 (a±e) Air flow over various shaped sections 591 14 Vehicle body aerodynamics The constant need for better fuel economy, greater vehicle performance, reduction ... motion is vigorous a transverse vortex will be established. 14. 2 Aerodynamic drag 14. 2.1 Pressure (form) drag (Figs 14. 12(a±e) and 14. 13) When viscous air flows over and...

Ngày tải lên: 21/07/2014, 17:20

... trucks and large articulated vehicles are shown in Figs 13. 1 and 13. 2 respectively. Refrigeration systems designed for motor vehicle trucks are basically made up of two parts supported on an aluminium ... compartment temperature for frozen food is usually set between À22  C and À25  C whereas the chilled compartment temperature is set between 3  C and 5  C. 13. 1 Refrigeration term...

Ngày tải lên: 21/07/2014, 17:20

... exhaust valve and opens the inlet valve. Air is now able to flow from the tractor emergency 539 12 .3. 23 Brake actuator chambers Purpose Brake actuator chambers convert the energy of compressed ... reduced. Fig. 12.20 (a±c) Quick release valve 533 (supply) line to the trailer's emergency line via the open inlet valve mounted in the lower part of the dump valve. As a result, when...

Ngày tải lên: 21/07/2014, 17:20

... 738 7: 93 kN=m 2 or 73: 9 bar c) Total power piston and  F 1  F 2 pedal push rod thrust  1:2  1:88  3: 08 kN Total master cylinder fluid pressure P 3  F 3 A 2  3: 08  4 (0:018) 2  121 03: 635 ... system 511 Fig. 11. 43 (a±d) Antilock brake system for commercial vehicles (ABS) 4 93 b) Power piston thrust F 2  A 1 (P 1 À P 2 )   4 (0:2) 2 (100 À40)  1:88 kN Master cylinde...

Ngày tải lên: 21/07/2014, 17:20

... (Fig. 11 .34 (a)). Fig. 11 .33 Load sensing and progressive pressure limiting valve front to rear brake line characteristics Fig. 11 .34 (a and b) Inertia pressure limiting valve 485 Fig. 11 .39 (a±c) ... (Figs 11 .34 and 11 .35 ) The operating principle of the inertia valve unit relies upon the inherent inertia of the heavy steel ball rolling up an inclined ramp when the retardation of the...

Ngày tải lên: 21/07/2014, 17:20