Dongfeng Honda Platinum Core sedan has been in the domestic market in September 2009, positioned as a high-end sports car class B. It uses the same platform with the Acura TSX, but it does not use a 2.4 L 148 kW engine prototype car Acura TSX, but equipped with a timing of Guangzhou Honda Accord sedan closer to the 2.4 L i-VTEC (intelligent variable valve timing and valve lift system) engine. Significant feature Platinum Core in configuration is used for electronic power steering EPS and antiskid device VSA dynamic adaptive EPS system coordinated control, in addition to the individual models is also equipped with a hard disk drive (HDD) navigation system and Honda smart key system, further improved comfort. The brake, the car using the front and rear solid disc ventilated disc brake system. In order to facilitate readers to understand the main technical highlights of the car, it will make some think platinum Rui introduced.
First, the engine
FIG 1
Platinum Core mounted in the 2.4 L engine using the i-VTEC technology, the maximum output power of 133 kW, the maximum output torque of 225 N? m (FIG. 1). And the intake pipe of the engine manifold of this resin material, help reduce vehicle curb weight.
The principle 1.i-VTEC
The following describes the working principle of the i-VTEC 2.4 L engine.
When the engine low-load, low-speed, two intake valves work under small stroke of the valve lifting cam drive. When the engine load is high, high speed, VTEC hydraulically actuated pistons, connecting the rocker 3 to the intake side, the valve lifting large stroke cam drive two intake valves work.
FIG. 2
of the intake side rocker arm Platinum Core 2.4 L engine using high-strength aluminum, which is conducive to reduce the quality of the engine. Note that, when the maintenance personnel servicing the rocker arm, the spacer must be added (FIG. 2) between the rocker arm, otherwise it will cause rubbing between the aluminum article being damaged. In addition, the bush is pressed into the mosaic, can not be replaced or re-pushed.
2. The crankshaft position sensor (the CKP)
Figure 3
In order to improve the detection accuracy of the position of the crankshaft, CKP pulse plate Platinum Core 2.4 L engine with CKP sensor disposed in the position of the transmission side, so that the crankshaft can be reduced to crankshaft torsional vibrations affect the positioning of the pulse plate. Crank pulse detection interval is 6 deg; (FIG. 3), so that the detection can be carried out more finely, to improve misfire detection accuracy.
3.MAF sensor (air flow meter)
Platinum Core engine using the MAF sensor, the amount of air inhaled directly measured by the MAF sensor achieved precision of the fuel injection amount, so that improve the control precision of the air-fuel ratio. Further, IAT (intake air temperature) and the sensor is integral MAF sensor.
4. Injector
Figure 4
Platinum Core 2.4 L engine with injector holes 12 (FIG. 4) this improves the degree of atomization of the injected fuel to effectively improve the power output of the engine, and reduce emissions.
The exhaust system
Figure 5
Platinum Core 2.4 L engine using the quick warming-up three-way catalyst and a vehicle body design of two-stage three-way catalyst TWC (FIG. 5). The metal content of the catalyst is reduced, while improving the heat resistance of the catalyst, and therefore can be warmed quickly after starting the engine, reduce emissions more rapidly. Further, the engine uses a built-in cylinder head manifold after engine start by the compactness and lightweight to achieve a rapid onset of low emission vehicles catalytic converters.
Second, the automatic transmission
Platinum Core 2.4 L engine mounted 5-speed automatic transmission, the following brief technical characteristics of the transmission.
lockup clutch 1.
Figure 6
By using the lockup clutch diaphragm spring SaveLess backlash, the bonding more quickly, thus achieving high-speed response performance of the lock-up clutch, help to reduce the fuel consumption of the vehicle; using a clutch plate (FIG. 6) FAS production method, which is not easy raising because the clutch plate, so that effectively reduce the wear and tear.
2. The shift paddles
Platinum Core release 5 models are equipped with shift paddles, fully reflect the characteristics of sports cars, by adjusting the shift operation of paddles which can realize a vehicle subtraction block.
Platinum Core S block and the D block can be carried out by manipulation of a shift gear change paddles. Toggle transducer engaged when the vehicle speed S; D toggle gear engaged when the vehicle shift paddles, the instrument shows the number of gear, when not operated shift paddles holding state cruising and the like, will automatically return to the automatic shift mode stopper paddles, and the meter displays the gear number of “M”, this time shift can only be achieved paddles manual transmission, if the selector lever does not return to the D range, the vehicle does not return to the automatic shift mode. Principle
Figure 7
In using the paddle shifters sheet Dangxia D, the vehicle automatically returns to the manual shift mode as the automatic shift mode (FIG. ) shown in FIG. PCM determines the running state (state cruising, acceleration state and a stopped state) in accordance with the vehicle speed and the amount of change in the throttle opening degree, then return to the automatic shift mode satisfies the predetermined condition.
3. The holding control shift (Shift Hold Control)
The so-called shift holding control, is a vehicle traveling at the D range, the PCM according to the steering wheel angle, vehicle speed and throttle opening isochronous link signal determining the vehicle enters a turn, held by the shift control during cornering prevent unnecessary lifting gear, to enhance the running stability when the vehicle turns. Further, by turning the new G shift control, the vehicle can be detected rotational speed difference between the two rear wheels, to further improve the accuracy of the determination of the turning.
Third, the steering system
1. The electronic power steering system (EPS)
Electronic power steering system EPS and the hydraulic power steering system is achieved compared by the electronic control simultaneously light stable and high speed at a low speed, the loss of power andSmall, help to reduce fuel consumption.
(1) the degree of inclination of the telescopic
Figure 8
Electronic power steering system capable of adjusting the tilt and telescoping steering column degrees (FIG. 8), tilt and telescopic adjustment of the locking lever is pressed using locking type, which is to prevent the locking lever causing injury to the driver when a vehicle collision occurs.
(2) a three-phase brushless AC motor
Figure 9
structure of the EPS motor is a three-phase AC brushless type, using the coaxial type steering (FIG. 9). A three-phase brushless AC motor type EPS wound from copper wire to the armature coil, a permanent magnet rotor and a resolver for detecting the rotor position (angle sensor) configuration. The resolver detects the three-phase armature coils (U-V-W) energization mode, thereby controlling the EPS motor. Note here that the maintenance personnel, EPS independent power plug out, taking care to avoid damaging it during disassembly.
2. Dynamic Adaptive EPS
Platinum Core EPS dynamic adaptive system, a so-called dynamic adaptability EPS is the combined and coordinated control of the VSA (antiskid device) and EPS (electronic power steering )system. This system is capable of turning in the case of slippery roads and other vehicles easily out of control, power steering torque correction complement to help the driver stabilize the steering.
Such a control system is by VSA (lateral acceleration) by the yaw rate sensor, steering angle sensor, wheel speed sensors and other components of the PCM, and the torque sensor and the EPS system to coordinate the PCM composition achieved. Further, in the assist torque control, by using the yaw rate sensor signal directly to achieve smooth steering assist coordination.
works
Dynamic Adaptability EPS as follows.
In the event of steering failure (e.g., turning on slippery surfaces), will increase the average driver’s steering angle in an attempt to return to the desired path, but the steering wheel rotational angle excess exacerbate the loss of directional control . In the case of the upcoming oversteer is detected, the system will dynamically adaptive EPS drivingIncreasing the required steering torque of the steering wheel when driving by attempting to increase the angle of the steering wheel, thereby indicating the driver’s steering failure is imminent, and impede the driver over-rotation of the steering wheel. At this time when the reverse rotation of the driver’s steering wheel, i.e. to the direction of rotation opposite to oversteer steering wheel, the steering wheel system will “lighter”, assisting a driver to complete the operation successfully. And, when appropriate control of the VSA and the output torque of the engine brake system, the vehicle stable.
driving in cold areas, sometimes unilateral tires in contact with the icy road. In this case the brake, since the side in contact with the icy road surface of the tire adhesion is small, the loss of control of the vehicle can be shifted in the direction of a dry road. At this point the system will start VSA ABS system prevents the wheels from locking, while EPS dynamic adaptability will help to maintain a straight direction of the steering wheel operation “lighter” to assist the driver steering correction, with the VSA system to stabilize the vehicle .
Note that, in the case of dynamic adaptability EPS switch off the VSA VSA system fails or is ineffective.
Fourth, the braking system
Platinum Core 16 inches in the front wheel brake using brake disc cooling, a solid 15-inch rear wheel brake the brake disc.
1. The brake booster
10
using the brake booster through bolt (FIG. 10), can be suppressed deformation during strong braking, improved brake feeling.
After the caliper 2.
Platinum Core rear brake caliper and the parking brake systems have been redesigned by a shaft rotatably connected to the brake lever, driving two the cam plate (balls interposed between the cam plate 2) is rotated by pressing the piston shaft to generate braking force. Maintenance personnel should pay attention here, because it is a new design, the rear brake caliper replacement warranty parts may be subject to change.
3. The parking brake lever
using the parking brake lever type connector rod, the rod connecting portion with the intermediate cable. Thus, the parking brake lever becomes miniaturized, the central space of the storage compartment becomesBig.
Fifth, the navigation system
1. The navigation self-diagnosis
The navigation system includes a self-diagnosis function, as follows.
while holding down the “current position”, “destination” and “Back” button and hold it three, integrated information screen will display the self-diagnosis menu screen. On the self-diagnosis menu screen, select “Diagnostics menu” to enter the diagnostic menu and then select “System Connection Doctor”, then it will display to confirm the results connected to the system. Further, a sensor system can confirm information, full emptying NAVI information, traffic guidance mode setting, SC is set to prevent recording camera and a rear guide adjustment operations.
Select “diagnostic means” in the diagnosis menu screen, the navigation control unit will be able to monitor, the camera, a hands free (HFT), navigation to confirm the diagnosis by Bullock and details of the audio button.
2. Parking sensors
on the front of the vehicle, the bumper is attached to each of four parking sensors, a vehicle approaches the obstacle, the buzzer will alarm, and integrated information perceived position display on the display screen, based on the sensed distance, the buzzer beeps speed (frequency) will have three sections of different variations.
parking sensors operating conditions were as follows.
① parking sensor switch to open. Started to operate
② speed of 8 km / h or less, and stops when the vehicle speed 15 km / h or more. When
③ move forward, only perceived in front of the obstacle.
④ When retracted, only the rear portion of the front corners of the sensor and a sensor for sensing.
maintenance personnel should pay attention to maintenance, parking sensor fails, it will display “Check System” message and fault location on a comprehensive information display, where the position sensor failure will continue to light. In addition to the faulty sensor, other sensors are working properly. If a portion of the sensor is dirty snow, mud, etc., there will be a temporary fault tips, as long as the removal of impurities, fault display will be eliminated.
Sixth, the smart key system
Some Platinum Rui Si models uses Honda smart key system that allows the driver to simply bring Honda smart key, or operation without inserting the key, you can achieve the door lock / unlock, start the engine and luggage compartment unlock / stop functions .
1. The key fob structure
11
Honda Honda smart key fob into the body portion 2 and the anti-theft key (FIG. 11). When Honda smart key system does not work, the use of anti-theft key can start the engine. Remove cap and ignition switch knob, the immobilizer key into the ignition key cylinder, the key can be rotated to start the engine.
2. scope
scope Honda smart key system is a driver-side door handle and the outer decklid handle front passenger extend around about 80 cm enclosed in the region. Even within the scope, if Honda smart key located close to the ground or too high places, and sometimes it will not work. When
Honda smart key electronic control system and the vehicle key, there will be a weak radio waves, and susceptible to interference. Therefore, maintenance personnel in the smart key system for fault diagnosis, should take into account the following situations may cause the system not working properly or unstable.
① when nearby strong radio wave emitting means. When
② cell phones, walkie-talkies and other communications equipment and laptop computers and other items and Honda Smart Key together.
③ Honda smart key when the metal objects come into contact.
④ Even Honda smart key on the car, but if placed close to the vehicle body or the window from a place, can still start the engine; and a smart key even in the car, but if the debris is placed when the box or door pocket, the engine may not start.
(Xiao)