Vehicle cleaning system

Patent metadata

Field	Value
Publication number	US-11117553-B2
Application number	US-201916393390-A
Country	US
Kind code	B2
Filing date	Apr 24, 2019
Priority date	May 8, 2018
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

A vehicle cleaning system includes a wiper motor, a vehicle wiper, a washer nozzle, a washer pump, and a controller. The wiper motor forwardly and reversely rotates an output shaft. The vehicle wiper is coupled to the output shaft and reciprocally wipes a surface for wiping in accordance with forward and reverse rotations of the output shaft. The washer nozzle is arranged on the vehicle wiper. The washer pump feeds a washer fluid to the washer nozzle. The controller controls the wiper motor and the washer pump. The controller drives the washer pump so that the washer fluid is ejected in a direction in which accumulated snow is present based on a determination that the vehicle wiper is in a constrained state caused by accumulated snow.

First claim

What is claimed is:

1. A vehicle cleaning system, comprising:
a wiper motor that forwardly and reversely rotates an output shaft;
a vehicle wiper that is coupled to the output shaft and reciprocally wipes a surface for wiping in accordance with forward and reverse rotations of the output shaft;
a washer nozzle arranged on the vehicle wiper;
a washer pump that feeds a washer fluid to the washer nozzle; and
a controller that controls the wiper motor and the washer pump, wherein
the controller drives the washer pump so that the washer fluid is ejected in a direction in which accumulated snow is present based on a determination that, when the washer pump is not driven, the vehicle wiper is in a constrained state caused by accumulated snow.

2. The vehicle cleaning system according to claim 1 , wherein
the washer nozzle is at least one of a forward nozzle or a backward nozzle,
the forward nozzle is capable of ejecting the washer fluid in a direction in which the vehicle wiper moves forward, and
the backward nozzle is capable of ejecting the washer fluid in a direction in which the vehicle wiper moves backward.

3. The vehicle cleaning system according to claim 1 , wherein a determination condition for determining that the vehicle wiper is in the constrained state includes an ambient temperature being less than or equal to a predetermined value.

4. The vehicle cleaning system according to claim 1 , wherein a determination condition for determining that the vehicle wiper is in the constrained state includes the vehicle wiper being located in a range from a reversal position to a predetermined position excluding the reversal position.

5. The vehicle cleaning system according to claim 1 , wherein
the controller is configured to reversely drive the wiper motor when the vehicle wiper becomes constrained, and
a determination condition for determining that the vehicle wiper is in the constrained state includes the vehicle wiper consecutively becoming constrained a predetermined number of times as the vehicle wiper is driven in the same direction.

6. The vehicle cleaning system according to claim 1 , wherein the controller drives the washer pump based on a determination that the vehicle wiper is in the constrained state and a vehicle being at a standstill.

7. The vehicle cleaning system according to claim 1 , wherein when it is determined that the vehicle wiper is in the constrained state, the controller subsequently drives the washer pump as the vehicle wiper approaches a position in which the vehicle wiper was constrained.

8. The vehicle cleaning system according to claim 1 , wherein
the controller drives the washer pump in accordance with predetermined setting based on determination that the vehicle wiper is in the constrained state, and
when it is subsequently determined that the vehicle wiper is not released from the constrained state, the controller stops the washer pump.

9. The vehicle cleaning system according to claim 8 , wherein when it is determined that the vehicle wiper is not released from the constrained state, the controller stops the washer pump and causes a notification unit to issue a notification.

Assignees

• Denso Corp

Inventors

• Toyama Ryo

Classifications

• B60S1/52

  Arrangement of nozzles; {Liquid spreading means}(nozzles per se B05B) · CPC title

• B60S1/08

  electrically driven {(conjoint control of windscreen wiper motor and liquid supply of windscreen washer B60S1/482; conjoint control of windscreen wiper motor and means for cleaning parts o parts other than windscreens or front windows B60S1/56, B60S1/58, B60S1/606)} · CPC title

• B60S1/524

  arranged in wiper blades · CPC title

• B60S1/482 Primary

  combined with the operation of windscreen wipers · CPC title

• B60S1/486

  including control systems responsive to a vehicle driving condition, e.g. speed · CPC title