by the Beijing Hyundai ix35 Hyundai R & D center in Frankfurt, Germany, developed a new SUV, equipped with a 2.0 L and 2.4 L theta; -II dual CVVT engine. The maximum output power of 2.0 L engine was 120 kW (6 200 r / min), maximum torque of 194 N? M (4 600 r / min). 2.4 L of the engine maximum power of 128 kW (6 000 r / min), maximum torque of 226 N? M (4 000 r / min). Modern car 6-speed manual matching / transmission from one. The car uses a lot of advanced technology in terms of power, safety and comfort and so on. The car was listed in April 2010, it attracted much attention. In order to facilitate the readers understanding of the car, we briefly introduce some highlights of this technology to it.
First, the engine system
FIG 1
FIG. 2
engine air intake system with variable intake system (FIG. 1), is provided with an intake passage 2 of different lengths, is performed by the control unit in accordance with the engine load and the engine rotational speed control (FIG. 2), to improve the intake efficiency. The exhaust system with integrated three-way catalyst the CCC (FIG. 3), the cylinder head is reduced to a three-way catalyst and the exhaust resistance from the power performance of the engine 1 to improve the percentage of 1-2 percentages. Valve system uses dual CVVT continuously variable valve timing mechanism, the intake air, while the exhaust phase is adjusted (FIG. 4). The engine CVVT operating range is widened, so that the valve phase wider overlapping range, greatly improving the intake and exhaust efficiency. By controlling the exhaust timing, reduce the emission of harmful gases. Valve operating point optimization, to improve the engine output torque. The engine control unit ECM by adjusting the duty cycle of signal PWM oil control valve, thereby adjusting the valve timing. Emission control linear oxygen sensor, to achieve lower emissions.
Figure 3
Figure 4
Second, the transmission system
The automatic transmission 1.
6-speed manual mounting ix35 / transmission from one, this issue ldquo; Automatic Transmission maintenance technology rdquo; section of this transmission are described in detail.
time four-wheel drive 2.
Figure 5
ix35 wheel drive system employed in Japan JTEKT produced (FIG. 5) , two driven front wheel drive. Rear differential housing material is aluminum, the quality of only 9 kg, the output torque of up to 1 320 N? M. Differential oil JWS3309 (maintenance free), an amount of only 0.13 L. Intelligent torque control means coupled ITCC ECM wheel speed sensor signal, throttle position signal, engine speed signal, an engine torque signal, ABS / ESC brake operating signal and the control signal to the electromagnetic clutch EMC (FIG. 6), front and rear wheels to achieve transmission torque distribution, i.e., the torque coupling the intelligent control ITCC.
Figure 6
Third, the security system
1. Electronic Stability Control ESC [ 123]
Figure 7
For optimal driving safety, the car is applied ESC system (FIG. 7). When ESC recognized critical driving state, such as a panic reaction in the case of danger, in the case where the driver does not depress the brake pedal, the brake individual wheels, in conjunction with control of engine torque and maintain driving stability of the vehicle sex. The system consists of MANDO R & D, the use of MGH-60 version, compared with the MGH-40 version, an increase of HAC and DBC functions. The following are some of the features introduced ESC.
(1) ROP
ROP vehicle rollover system. It is processed by the yaw rate and lateral acceleration sensor signal, and actively control the braking torque output of the engine, in order to maintain stability of the vehicle (FIG. 8).
FIG. 8
(2) HAC
HAC is a slope start auxiliary control function. In the steep slope (steeper than 8 percentage) to help stabilize the driver stop and start. When the transmission is in neutral and forward gears, this function itself starts. It is determined by detecting the wheel speed, transmission gear and the moving direction of the vehicle driver’s intention, when the driver releases the brake pedal, the vehicle occurs when the driver’s intention decline does not match, the system automatically and immediately take measures to brake (FIG. 9) .
FIG. 9
(3) DBC
10
DBC downhill brake control function. When the vehicle steep (slope is greater than 8 percentage) traveling downhill road, the vehicle speed at 2 ~ 35 km / h, DBC system utilizes an engine brake and the brake system, the vehicle speed reaches the target speed (FIG. 10). DBC during startup, even without depressing the foot brake pedal, the brake lights will light. If the driver depresses the accelerator pedal or the brake pedal, DBC will automatically released.
2. Body Structure
11
by the vehicle design and the reinforcement (FIG. 11) of the body structure, so that vehicle safety is improved to some extent.
3. A brake system
12
the master cylinder diameter of 22.22 mm, the stroke of the piston increases from the original 30 mm to 45 mm, the brake booster vacuum pump diameter 280 mm. Since the increase of the master cylinder piston stroke, the quality of the vacuum booster pump (12) is reduced, the performance of the brake system is also improved. When
13
4. The airbag
The airbag control unit replacement ACU, the variable encoding program to be executed (FIG. 13) , by flashing a warning lamp and to determine the success of the encoding.
Fourth, the vehicle electrical system
1. Smart junction box SJB
FIG. 14 [ 123]
SJB smart junction box (FIG. 14) for access to the various electrical junction box intelligent control, it is ready to detect the state of the switch (FIG. 15), to the BCM and transmitted through the network, to realize various control functions. The IPS intelligent power switch (FIG. 16), the power feeding control of various electrical appliances. The various control relay, the control door locks, windscreen heater wire control, and the like. 5 s is not within the signal change, the system will enter sleep state, there is a change of any signal in the sleep state, the system immediately enters a normal state.
15 16
2. The key fob buttons and start the
FIG. 17 [ 123]
FIG. 18
ix35 equipped with a smart key and start button, and with a steering column lock electrically controlled, to achieve a keyless entry and start button (FIG. 17). Comparison with the conventional key smart key, intelligent key system uses electronically controlled steering column lock, no need to be able to turn the key to unlock the steering wheel. The first time you use the smart key to register it (Figure 18). The smart key in the initial state, ESCL electric steering column lock is in the unlocked state, then the engine can be started in the initial state. The key fob is inserted in the smart key cylinder (FIG. 19), press the start button once, the engine starting system is performed twice, and then enters the normal state.
19
Fifth, the air conditioning system
20
ix35 using the swash plate type variable capacity air conditioning compressor, an electromagnetic clutch control canceled, for real-time control of the refrigerating capacity of the compressor by an engine control unit ECM according to the actual cooling capacity required for the compressorSmoother and more economical. The air conditioning control section automatic light sensor and light sensor one, shared engine coolant temperature sensor signal. In the initial stage of air-conditioning opening, as ventilation air mixing and external (FIG. 20), can more quickly achieve a comfortable temperature inside the vehicle. The installation of an ion generator (FIG. 21) in the air-conditioning duct in the air-conditioned effectively eliminates odor.
21
(Wang Jinyan, CAO Xing lift)