Mazda CX-7 is a recently introduced Mazda domestic sales of a compact SUV, L5-VE-type vehicle equipped with an engine 2.5 L, 5-speed manual matching automatic transmission, in order to facilitate the car understand, introduced in this part of the technical highlights of the car.
First, the engine
FIG 1
2.5 L generation engine (1) is more suitable compression ratio achieved is good fuel adaptability, is fully capable of using domestic gasoline 93 and reduces the occurrence of knocking. Vehicle acceleration at low speed and start passing the engine torque response is very fast. Generally, the larger the engine displacement, the greater its fuel consumption. However, commonly used speed range, if the torque increases, the desired throttle opening degree may be reduced; more suitable if the mating transmission gear ratio, may also reduce the engine speed at the same speed, so as to obtain excellent fuel economy. 2.5 L engine to achieve the perfect balance between power, fuel economy and adaptability.
1. Mechanical system
(1) Compound of formula crankshaft belt wheel
FIG. 2
2.5L engine using a composite belt wheel crankshaft (FIG. 2), such a crankshaft disposed belt wheel vibration damper torsional vibration can be reduced when the crankshaft torsional vibration.
(2) flexibility flywheel
Figure 3
uses the engine flywheel flexibility, such a thin iron flywheel and flywheel (Figure 3), a thin iron plate to absorb the bending vibration.
2. The air intake system
(1) the intake pipe
increasing the diameter of the intake pipe old engine, the engine which respect the shape has been optimized, more conducive intake.
(2) of the swirl control system
Figure 4
swirl control valve also into shapeOK improved by the shape of the valve halves into a (FIG. 4). Further, the variable intake swirl control, and variable intake control variable intake control solenoid valve position also changes (FIG. 5).
Figure 5
(3) intake vacuum line
The intake system connected to the vacuum line (FIG. 6) .
Figure 6
3. The cooling fan control system
In the vehicle engine cooling system, different ways to control the temperature of the temperature control mode and the engine coolant temperature of the engine coolant temperature rises decrease. The cooling system uses a fan control unit No. 1, the control unit drives the cooling fan motor cooling fan according to a control signal sent PCM. PCM output duty control according to the engine coolant temperature. Fan control unit capable of continuously variable speed control of the cooling fan motor, the fan operation while reducing power consumption and noise.
The cooling fan control principle (FIG. 7), such as a cooling fan (FIG. 8) as shown in the control system circuit principle.
Figure 7
Figure 8
4. The fuel evaporative emission control system
Figure 9
the main element position vehicle fuel evaporative emission control system such as (FIG. 9), the rear portion of the car vehicle canister disposed fuel tank nearby.
The control system
10
The main element as the position of an engine control system (FIG. 10), the engine control unit placed behind the battery.
Second, the suspension system
1. The front suspension
FIG 1112
using the car front suspension lower arm strut-type front and 6:00 rubber holder system, as a specific configuration (FIG. 11).
2. After the suspension
vehicle rear suspension system using an E-type multi-link structure, as the specific structure (FIG. 12) FIG.
Third, the braking system
13
The car is equipped with a brake system (FIG. 13) with a function of DSC but due to the higher center of gravity of the vehicle, it is necessary to intervene when the DSC curve, thereby eliminating the DSC off function, but with TSC off function (FIG. 14).
14
control theory
function as a DSC (Figure 15).
15
is provided with a car steering wheel angle sensor, the steering wheel need only positive when the center point of the 1st ignition, then automatically positive data will be stored in the BCM, greatly improving the reliability in a variety of situations. BCM memory midpoint of the steering wheel, when the battery is removed or BCM connector terminal memory disappears.
Fourth, the automatic air conditioning system
automatic car uses dual-zone air conditioning system, when the dual-mode switch open area, the control unit may according to a solar radiation sensor and an indoor temperature sensor signal changes according to the temperature set by the user, continue to the outlet temperature of the driver side front passenger side can be adjusted.
1. Effect sensor
(1) a solar radiation sensor
16
The solar control unit the radiation sensor signal change to the system as shown in (FIG. 16) of the adjustment control logic.
(2) the indoor temperature sensor
17
The control unit in accordance with the room temperature massSystem sensor signal changes as shown in (FIG. 17) of the adjustment control logic.
2. The system output control logic
(1) the outlet temperature
FIG 18
air conditioning system of a control logic, such as temperature regulation (FIG. 18) and (table 1).
(2) the air flow
Table Mazda 1-2-3
air volume air conditioning system, such as control logic (Table 2 ) shown in FIG.
(3) a blowing mode
the air-conditioning system as blowing mode control logic (Table 3).
The car air conditioning system may communicate with other control units via CAN, CAN may be diagnosed by them.
Fifth, the airbag system
The car is equipped with a front driver airbag, passenger airbag before the front, side airbags and curtain airbags, airbag system by the control unit, the clock spring each airbag module and crash sensor elements, the control unit based on a signal provided by the collision sensor, trigger the opening of the airbag to provide protection for the vehicle occupants.
Security system provides a corresponding data flow, maintenance personnel can use the observed fault diagnostic data stream, the system facilitates servicing. Further, after the current row passenger airbag opening, no longer need to replace a full set of harness, the wire harness corresponding to only the front passenger side needs to be replaced individually (FIG. 19).
19
Sixth, the door lock control system
The car is equipped with a keyless entry system and the central-control door locks.
1. The keyless entry system
20
by a remote keyless entry system transmitter, a receiver, and all the BCM door lock actuator (Figure 20). When the user operates the remote controllerDoor lock control operation, the remote controller sends a signal to a receiver located in the glove box, the receiver transmits signals to BCM, BCM, after receiving the instruction, the control operation of the respective door lock actuators, thereby unlocking and locking.
2. The central-control door (FIG. 21)
21
When the user through the manipulation of the driver-side door lock actuator when the door lock interlocking switch or button on the driver’s side door, the door lock switch will send BCM interlocking or unlocking the blocking signal, and then instructs the door lock actuator to each BCM, controlling each door lock and unlocking actuators atresia.
(Han Kun)