The function of the front wiper motor
The wiper motor is the power core device of the car wiper system. It drives the turbine worm reduction mechanism through the built-in permanent magnet motor, converting the rotational motion of the armature into the reciprocating swing of the wiper arm to achieve the wiper function. This device adopts a three-brush structure to regulate the current intensity and achieves variable speed control of low-speed, high-speed and intermittent gears by changing the number of series coils. Its mechanical structure includes a gear reducer, a four-bar linkage mechanism and a reset device. The output shaft is driven by a fork and the spring reset mechanism ensures the precise swing trajectory of the scraper arm.
The core difference between the front motor and the rear motor lies in their position, performance impact and applicable scenarios: The front motor is located at the front of the vehicle, which is conducive to handling and heat dissipation. The rear motor is located at the rear end of the vehicle, optimizing weight distribution and acceleration performance. The choice between the two depends on specific needs, such as daily commuting or sports driving, and the dual-motor configuration can combine the advantages of both to enhance the overall performance.
Differences in location and function
Youdaoplaceholder0 Front motor : Drives the front wheels, has a compact structure, is convenient for direct control of the driving direction, and has better heat dissipation performance (airflow assists in cooling during driving).
Youdaoplaceholder0 Rear motor : Drives the rear wheels, optimizes the weight distribution at the front and rear of the vehicle, enhances driving smoothness, provides more direct power transmission, and has a faster acceleration response.
Performance, Advantages and disadvantages
Youdaoplaceholder0 front motor :
Advantages: Strong handling stability and precise steering; It has a relatively high collision safety level (the motor is less affected in front collisions). The manufacturing cost is relatively low.
Disadvantage: The weight distribution may lean forward, affecting the flexibility when taking high-speed turns.
Youdaoplaceholder0 rear motor :
Advantages: Better acceleration performance (direct power transmission); Balanced weight distribution enhances high-speed stability. Suitable for scenarios with high torque demands.
Disadvantage: The heat dissipation challenge is relatively large (additional design is required); The maintenance cost may be even higher.
Applicable scenarios and dual-motor configuration
Youdaoplaceholder0 front motor : Suitable for family commuter vehicles, emphasizing economy and stability in daily handling.
Youdaoplaceholder0 rear motor : Commonly found in high-performance cars or racing cars, emphasizing acceleration and sporty driving.
Youdaoplaceholder0 Dual motors : Combining the advantages of front motor control and rear motor acceleration, it enhances grip on complex terrains (such as reducing the risk of skidding on icy and snowy roads by approximately 40%), but it is more costly and increases power consumption by about 15% to 20%.
Front windshield cleaning function
The main function of pushing the wiper control lever forward is to activate the front windshield cleaning system, trigger the water spray and link the wiper to scrape and remove dirt or rainwater from the glass . This operation is common in most vehicle models.
Functions and operation details
The core function of is : pushing the control lever forward will activate the water spray device, and at the same time, the wipers will automatically move 1 to 3 times to ensure the cleaning effect.
Youdaoplaceholder0 operation mode :
Push the control lever short or long (for some models, long press is required), and water will be sprayed to start.
After completion, you need to manually turn the control lever back to the "OFF" position to stop the wipers.
Youdaoplaceholder0 vehicle model differences :
For most models (such as Toyota and Santana) : Pushing forward triggers the front windshield cleaning.
BMW X3: The forward push is specifically designed for the rear wiper to spray water.
Fox: Push forward to start and spray water from the front wipers; push backward to start and spray water from the front wipers.
The working principle of a windshield wiper is to drive the mechanical transmission system through a motor, converting rotational motion into the reciprocating swing of the wiper blade, thereby removing rainwater and dirt from the windshield .
The following is its core workflow:
Power source:
Youdaoplaceholder0 dc permanent magnet motor : As the core power component, it drives the rotor to rotate through the principle of electromagnetic induction.
Youdaoplaceholder0 worm gear reduction mechanism : It slows down the high-speed rotational motion of the motor and increases the torque, reducing the output shaft speed to a range suitable for the operation of the wiper . Motion conversion
Youdaoplaceholder0 four-bar linkage mechanism : converts the decelerated rotational motion into the left and right swing of the wiper arm (the swing Angle is usually 90°-130°) .
Youdaoplaceholder0 scraper rubber strip : Under the pressure of a spring, it closely adheres to the glass surface and scrapes off rainwater and dust by swinging . Control system
Youdaoplaceholder0 multi-speed adjustment : Different scraping speeds such as low speed and high speed are achieved through the three-brush structure of the motor .
Youdaoplaceholder0 Intermittent mode : The brushing interval time is controlled by a relay, suitable for light rainy weather .
Youdaoplaceholder0 Smart wiper : Some models are equipped with a rain sensor that automatically adjusts the wiper frequency .
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