CN208021257U - A kind of electric vehicle uphill starting system - Google Patents

Abstract

The utility model discloses a kind of electric vehicle uphill starting system, electric vehicle is equipped with entire car controller, brake and parking brake, the entire car controller output drive signal is to electric machine controller, the electric machine controller driving motor work, entire car controller obtains speed signal, to entire car controller, the entire car controller output drive signal extremely brakes for the brake and parking brake output status signal.The utility model has the advantage of systems to be not required to increase hardware device, hardware configuration is simple, it only need to be according to existing hardware apparatus suggested corresponding signal transitive relation, it is slipped by slope to realize using not will produce in range of grade, and system is in the especially big gradient, since a brake frequency is up to thousands of times per second, the time is slipped by slope in Millisecond.

Description

A kind of electric vehicle uphill starting system

Technical field

The utility model is related to electric vehicle field more particularly to the uphill starting technologies of electric vehicle.

Background technology

With the development of society, energy crisis and environmental pollution increasingly severely become restrict economic development it is important because Element, electric vehicle have obtained the great attention of national governments and automobile industry as the useful direction for solving problems.However Since the Development of Electric Vehicles time is short, many aspects are also immature, and there are many problems to be solved.Such as electric vehicle exists Since starting torque change rate is big when starting, the gap of transmission gear will produce noise and vibration.Electric vehicle is in upper and lower hill start When step, car slipping also easy to happen and reversing the phenomenon that.Releasing of brake and step on the throttle acceleration during, automobile is at one section Unpowered situation can be in time, if started in ramp, under the effect of gravity, there are one the tractive force of descending for vehicle.

It is slipped by slope to solve the problems, such as that ramp starts, traditional fuel vehicle is usually equipped with ramp auxiliary system (Hill Hold Control, HHC), ramp auxiliary system, by HYDRAULIC CONTROL SYSTEM brake force delay cutoff, is after brake is unclamped Driver provides certain brake force, prevents the generation slipped by slope getting off the brakes to during stepping on the gas.But due to electronic Automobile is usually reequiped by conventional fuel oil car, and HCC is largely not configured, thus does not also have ramp miscellaneous function, to increase, machinery It is higher to reequip cost.

In order to solve the problems, such as electric vehicle uphill starting, it is on vehicle that the prior art, which generally has a few class methods, one kind, Ramp sensor is installed, by the detection to the gradient, the required output torque of car slipping motor does not occur for calculating, is unclamped in parking brake While, control motor exports target torque；Such methods are since Motor torque rising needs the time, and torque demand calculating is deposited In error, the phenomenon that ramp starts car slipping can not be completely eliminated.Another kind of method is believed according to vehicle gear, motor speed Breath slips by slope to judge whether vehicle is in state, then according to gear information, the output torque of motor is adjusted, until vehicle stops Only slip by slope；Such methods need a trial and error and adjustment process, a method for slipping by slope distance and speed are only reduced, for very It is allow to slip by slope the very short occasion of distance more, it still can cause collision problem.

Utility model content

Technical problem to be solved in the utility model be realize it is a kind of it is at low cost, using reliable, and can apply in electricity The electric vehicle uphill starting system of electrical automobile.

To achieve the goals above, the technical solution adopted in the utility model is：A kind of electric vehicle uphill starting system, Electric vehicle is equipped with entire car controller, brake and parking brake, and the entire car controller output drive signal is described to electric machine controller Electric machine controller driving motor works, and entire car controller obtains speed ??signal, and the brake and parking brake output status signal are to whole Vehicle controller, the entire car controller output drive signal to brake.

The throttle and gear output status signal of electric vehicle are to entire car controller.

The parking brake is electronics servobrake, and output pulls on parking brake or unclamps the status signal of parking brake to full-vehicle control Device.

The utility model has the advantage of systems to be not required to increase hardware device, and hardware configuration is simple, only need to be according to existing hard Part apparatus suggested corresponding signal transitive relation is slipped by slope to realize using not will produce in range of grade, and system is in spy On heavy grade, since a brake frequency is up to thousands of times per second, the time is slipped by slope in Millisecond.

Description of the drawings

The content of every width attached drawing expression in the utility model specification is briefly described below：

Fig. 1 is electric vehicle uphill starting system block diagram.

Specific implementation mode

As shown in Figure 1, electric vehicle uphill starting system is to provide a kind of system that electric vehicle ramp starts, prevent from slipping Vehicle phenomenon and the loss thereby resulted in occur, system brake, parking brake, throttle, gear, entire car controller, motor and motor control Device processed.

Wherein, entire car controller output drive signal is to electric machine controller, the work of electric machine controller driving motor, motor and Its controller is well known permanent magnet synchronous motor and its electric machine controller.It brakes and parking brake output status signal to full-vehicle control Device brakes as electronics servobrake, i.e. driver does not depress brake pedal, and entire car controller can also be by electronically controlling System brake；Parking brake is also electronics servobrake, and parking brake provides two signals, pulls on parking brake and unclamps two shape states of parking brake.

Gear is electronics gear, provides gear and encodes to entire car controller, while entire car controller obtains speed ??signal, whole Vehicle controller, according to the operation signals such as the gear of driver, throttle, direction, brake, control vehicle traveling, output drive signal To brake.

Control method based on above-mentioned electric vehicle uphill starting system is as follows：

Key is reached startup shelves by step 1, driver, and vehicle powers on；

Gear is transformed into drive shift or reverse gear by step 2, driver by park position；

Step 3 is not detected driver and steps on brake, and detects that driver unclamps parking brake；

Step 4, vehicle control unit controls brake；

If step 5 detects that driver steps on the throttle, and it is defeated then to control motor within the scope of crawling for throttle depth Go out torque, until being promoted to 30 ° of on-grade parking torques of design；

Step 6 reduces brake depth, after motor output torque, braking torque and ramp torque reach equalization point, motor Start to rotate with wheel；If direction of motor rotation is consistent with gear direction initialization, motor output torque and brake are reduced simultaneously Vehicle torque makes speed be maintained at 6 kilometers per hour below；If direction of motor rotation and gear direction initialization are inconsistent, carry High motor output torque, brake uses ABS point off density brake modes, until direction of motor rotation is consistent with gear direction initialization.

The system and its control method, can be when electric vehicle starts, vehicle control unit controls brake, motor output torque Reach design grade and do not slip by slope torque, reduce braking torque, adjust Motor torque, motor and wheel turn when electric vehicle being made to start To consistent with gear.

The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by The limitation of aforesaid way, as long as using the methodology of the utility model and various unsubstantialities that technical solution carries out change Into, or it is not improved the design of the utility model and technical solution are directly applied into other occasions, in the utility model Protection domain within.

Claims (3)

1. a kind of electric vehicle uphill starting system, electric vehicle is equipped with entire car controller, brake and parking brake, the full-vehicle control Device output drive signal to electric machine controller, the electric machine controller driving motor works, it is characterised in that：Entire car controller obtains Take speed ??signal, the brake and parking brake output status signal to entire car controller, the entire car controller output drive signal To brake.

2. electric vehicle uphill starting system according to claim 1, it is characterised in that：The throttle and gear of electric vehicle Output status signal is to entire car controller.

3. electric vehicle uphill starting system according to claim 1 or 2, it is characterised in that：The parking brake helps for electronics Power is braked, and output pulls on parking brake or unclamps the status signal of parking brake to entire car controller.