Nội dung

HAKO Overheadmodels - News Order no. 430 Torque converter lock-up clutch Functions: - Power flow from the converter housing via the pump, stator and turbine to the inlet shaft of the gearbox with the lock-up switched off. - The hydraulic piston is pressed onto the friction disks with the help of the oil pressure - The power flow now runs from the converter housing directly to the inlet shaft, the slip is switched off. Order no. 427 Transistor After less than one revolution, adhesion has resulted. The base is actuated by closing the switch. The With the help of the electronically operated throttle collector emitter line becomes conductive, the lamp valve, the slip can be adapted to the driving lights up. This can be shown clearly with the help situation of the water analogy. When the small flow of water in question. Order no. 434 Cylinder shutoff The cylinder shutoff, a new development for the new Daimler Benz S class, is switched on and off electro-hydraulically by the control unit. In the lower load area, 4 cylinders are switched off, in the upper load area there is a switch-over to 8 cylinders. The valves are operated in a locked state. If the coupling pins are removed, the valves remain closed. The driving levers are pressed onto the camshaft by springs in an unlocked state. Order no. 429 Haldex clutch It replaces the viscous clutch in four-wheel drive. As soon as a difference in speed comes about between front and rear axle, the swash plate begins to turn. In this, it operates the pump plunger, which presses hydraulic oil into the plunger of the friction disks. reaches the base, this flow of water opens the slide and makes the way free for the large water flow (collector emitter line), the water can flow. Order no. 437 Spring leg (air suspension) Used in the Daimler Benz S class. - Function of a modern car air suspension - Function of the level control - Function of the damping and the various damping strengths TECHNOLAB SA, Rotherdweg 16, Postfach, CH-5022 Rombach - Switzerland Tel: +41 62 827 11 11 - Fax: +41 62 827 11 70 - e-mail: info@technolab.org - www.technolab.org 1 HAKO Overheadmodels - News Order no. 432 SMART gearbox This new construction by the firm of GRETAG shows a mechanical manual transmission with six forward gears and one reverse gear. A gear selector drum driven by an electric motor operates the shifting. Order no. 438 Sixteen-speed gearbox for trucks The basic module comprises a gearbox with four gears. By adding a front-mounted and a rearmounted module, a sixteen-speed gearbox results. With the help of the left-hand sleeve, the Order no. 433 Six-speed gearbox This gearbox is ideal for practising the power flow in the individual gears. The shifting sleeves are distributed to both main shafts. A fourth shifting sleeve was required for the synchronised reverse gear. sleeves. For the differential, 2 different transmission ratios can be shifted, which means that 6 forward gears result from the 3 forward gears of the main shaft. An automatic clutch actuator takes over the clutch engagement and de-clutching in each change of gear. The gearbox can be fitted as a semi-automatic or fully automatic gearbox. counter shaft can be driven with two transmission ratios. In this way eight forward gears result from four gears. In the rear-mounted group, two transmission ratios of the secondry shaft can be shifted with the help of a simple planteary gear set. Eight gear steps times two results in sixteen speeds. The power flow in the individual gears can be drawn onto a supplied worksheet by the pupils Order no. 428 One-vane vacuum pump This new construction is the simplest, yet at the same time most powerful vacuum pump for Diesel and Otto engines. Turning the rotor by a lever makes the enlargement and reduction of the area in each revolution clearly recognisable. TECHNOLAB SA, Rotherdweg 16, Postfach, CH-5022 Rombach - Switzerland Tel: +41 62 827 11 11 - Fax: +41 62 827 11 70 - e-mail: info@technolab.org - www.technolab.org 2 HAKO Overheadmodels - News Order no. 426 Lifting tackle I drive with a transmission artio of 40 : 1 Functions: - Principle of a lifting tackle with two loose and two fixed rolls - Function of a lifting tackle with loose roll-read-off of the various distances - Function of the worm - Reading off the various distances; differing forces result from this Order no. 435 Valve operation, valve play Functions: - Differing valve stroke with differing heights oc cams - Reading off the angle of opening with differing shapes of cams Order no. 436 Lifting tackle II Order no. 431 Double acting cylinder - Function of a double acting cylinder without damping. - Function of a double acting cylinder with damping Both throttle valves are mobile, which means that differing damping figures can be set. - Correct setting of the valve play with the help of a - Effects on the engine if the valve play is too large thickness gauge - Heat expansion of the valve and the effects if the valve play is too low TECHNOLAB SA, Rotherdweg 16, Postfach, CH-5022 Rombach - Switzerland Tel: +41 62 827 11 11 - Fax: +41 62 827 11 70 - e-mail: info@technolab.org - www.technolab.org 3 HAKO Overheadmodels - News Order no. 439 Synchromesh assembly with locking gearing Synchronisation by friction Shifting of the gear Movement of gearshift rod and gearshift fork Driving of the selector sleeve Application of the synchroniser rings Order no. 448 CVT-gearbox Nissan Order no. 451 Five-speed shift dogtransmission Infinite transmission for rear-wheel driven cars, suitable up to 500 Nm. A roll is used for the force transmission. Pivoting the roll alters the gear ratio infinitely. Flow of force in the shift dog transmission Peculiarity of shift dog transmissions Shifting of the five gears Order no. 449 Electric retarder Turning the aluminium plate (ball-bearing) Movement of the pair of permanent magnets Slight to strong braking of the disk, depending upon the position of the magnets Moving the plate with the help of the magnets TECHNOLAB SA, Rotherdweg 16, Postfach, CH-5022 Rombach - Switzerland Tel: +41 62 827 11 11 - Fax: +41 62 827 11 70 - e-mail: info@technolab.org - www.technolab.org 4 HAKO Overheadmodels - News Order no. 440 Pump-nozzle injection system II Function of the solenoid valve Pre-injection and main injection Latest generation of the pump-nozzle unit system Generation of high pressure (2000 bar) Function of injection cam and rocker arm Function of the high pressure injection element If the engine speed is too low, the cross-section is reduced, the output rotor turns more quickly If the engine speed is too low, the cross-section is reduced, the output rotor turns more quickly Order no. 442 Air flow in a variable turbocharger With the help of the fan supplied, air is pressed into the turbo charger; function of the guide vanes Order no. 444 Idle-speed control Task of the rotary actuator Function of the rotary valve Normal function, emergency operation function Order no. 450 Solenoid Switch of preengaged starter motor Order no. 443 Auxillary bypass valve The additional air slide as a bypass Function of the bimetal Closing the contacts by the contact bridge Function and interaction of the springs Function of pull-in and holding winding Pulling of the armature when current flows TECHNOLAB SA, Rotherdweg 16, Postfach, CH-5022 Rombach - Switzerland Tel: +41 62 827 11 11 - Fax: +41 62 827 11 70 - e-mail: info@technolab.org - www.technolab.org 5 HAKO Overheadmodels - News Order no. 441 Potentiometer Mode of effect of a potentiometer Wiring diagram of a potentiometer Production of the clearance Adjustment with wear of the lining Order no. 452 Stepper motor Mode of effect of a stepper motor Polarity reversal of windings 1 and 2 Function of the sliding contact Function as a power divider Order no. 446 Automatic adjustment and lift clearance Deformation of the gasket ring Return to shape of the gasket ring Order no. 445 Rim offset Meaning of the expression "offset" Effects of various offsets Change of the poles of the magnetic fields Movement of the impeller (steps turning left or right) on the kingpin offset (e.g. a negative kingpin offset can turn into a positive one) Effects of fitting wider tyres Order no. 447 Clutch disk with torsional absorber Purpose of the torsion-bar suspension Task of the torsion springs Mode of effect of the various torsion springs Torsion between hub and disk Function of the stop bolts TECHNOLAB SA, Rotherdweg 16, Postfach, CH-5022 Rombach - Switzerland Tel: +41 62 827 11 11 - Fax: +41 62 827 11 70 - e-mail: info@technolab.org - www.technolab.org 6 HAKO Overheadmodels - News Order no. 457 Variable compression ratio (SVC engine) By pivoting the cylinder block plus added parts around a pivoting axis, the compression ratio can be altered infinitely from 8:1 (full load with full loading pressure) to 14:1 (part load with low loading pressure) Order no. 455 Common-rail injector II Maximisation of the compression ratio from idling to Opening and closing of the nozzle needle with pilot full load with minimisation of the furel consumption injection, main injection and subsequent injection. and pollutant discharge. Order no. 455 Common-rail injector II Opening and closing of the spherical valve on the ball support as a function of the solenoid valve and Opening and closing of the nozzle needle with pilot the high pressure on the valve actuation piston. injection, main injection and subsequent injection. TECHNOLAB SA, Rotherdweg 16, Postfach, CH-5022 Rombach - Switzerland Tel: +41 62 827 11 11 - Fax: +41 62 827 11 70 - e-mail: info@technolab.org - www.technolab.org 7 HAKO Overheadmodels - News Order no. 453 Altitude sensor With the help of a lever on which there is a cam, the altitude capsule can be spread and one sees how the red lever is moved and the sensing on the resistance path of the potentiometer is displaced. The altitude sensor reports the alteration in air pressure compared with the loading pressure regulation to the control device and leads to a correction of the amount injected. Order no. 456 Pneumatic suspension Level regulation: if the vehicle is loaded, the level regulator in the control valve opens and air flows into the bellows of the pneumatic spring until the standard level is reached again. In relief, the level regulator in the control valve opens and allows air to flow out until the standard level is reached again. TECHNOLAB SA, Rotherdweg 16, Postfach, CH-5022 Rombach - Switzerland Tel: +41 62 827 11 11 - Fax: +41 62 827 11 70 - e-mail: info@technolab.org - www.technolab.org 8