Collision detection device for vehicle

• US 9,663,053 B2
• Filed: 08/05/2015
• Issued: 05/30/2017
• Est. Priority Date: 08/08/2014
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Saitoh, Yukihiro, Nakane, Daisuke, Tanabe, Takatoshi
• Primary Examiner(s): Dayoan, Glenn
• Assistant Examiner(s): Chenevert, Paul
• Application Number:
  US14/819,235
• Publication Number:
  US 20160039379A1
• Time in Patent Office: 664 Days
• CPC Class Codes: B60R 19/18 characterised by the cross-section; Means within the bumper to absorb impact
• CPC Class Codes: B60R 19/483 with obstacle sensors of electric or electronic type
• CPC Class Codes: B60R 2019/186 Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
• CPC Class Codes: B60R 21/0136 responsive to actual contact with an obstacle , e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle monitoring crash strength in combination with passenger seat detection B60R21/01558

Abstract

A collision detection device includes a chamber member, a pressure sensor, a collision detection ECU, and a projecting portion. The chamber member is disposed on a vehicle-front side of a bumper reinforcement in a bumper cover and includes a chamber main body having therein a hollow portion. The pressure sensor detects pressure in the hollow portion of the chamber main body. A clearance is formed between the chamber member and a front surface of the bumper reinforcement at least on a part of a rear surface of the chamber main body. The collision detection ECU detects a collision of an object with the bumper cover based on a pressure detection result by the pressure sensor. The projecting portion is provided to project from the rear surface of the chamber main body, and an end of the projecting portion is in contact with the front surface of the bumper reinforcement.

Claims

1. A collision detection device for a vehicle having a bumper cover and a bumper reinforcement, the collision detection device comprising:

a chamber member that is disposed on a vehicle-front side of the bumper reinforcement in the bumper cover and includes a chamber main body having therein a hollow portion;

a pressure sensor that detects pressure in the hollow portion of the chamber main body, wherein a clearance is formed between the chamber member and a front surface of the bumper reinforcement at least on a part of a rear surface of the chamber main body;

a collision detection electronic control unit (ECU) that detects a collision of an object with the bumper cover based on a pressure detection result by the pressure sensor; and

a projecting portion which is provided to project from the rear surface of the chamber main body and whose end is in contact with the front surface of the bumper reinforcement,

wherein the projecting portion is provided to extend in an up-down direction of the vehicle.

2. The collision detection device according to claim 1, wherein the projecting portion is made from low density polyethylene.

3. The collision detection device according to claim 1, wherein the projecting portion is one of a plurality of projecting portions that are arranged at predetermined intervals.

4. The collision detection device according to claim 1, wherein the projecting portion is one of a plurality of projecting portions that are arranged at predetermined intervals in a width direction of the vehicle.

5. The collision detection device according to claim 1, wherein the projecting portion is one of a plurality of projecting portions that are arranged at predetermined intervals in an up-down direction of the vehicle.

6. The collision detection device according to claim 1, wherein:

the clearance is formed between the chamber member and the front surface of the bumper reinforcement on the rear surface of each of right and left end regions of the chamber main body in a width direction of the vehicle; and

the projecting portion is provided on the rear surface of each of the right and left end regions of the chamber main body.

7. The collision detection device according to claim 1, wherein the length of the chamber main body in a front-rear direction of the vehicle is constant entirely in a width direction of the vehicle.

8. The collision detection device according to claim 1, wherein the projecting portion is formed integrally with the chamber main body.

9. The collision detection device according to claim 8, wherein the projecting portion is formed integrally with the chamber main body by blow molding using a resin material.

10. The collision detection device according to claim 1, wherein the projecting portion is formed in a tapered shape whose diameter is reduced toward its end.

11. The collision detection device according to claim 10, wherein the projecting portion is formed in a trapezoidal shape in its planar view.

12. The collision detection device according to claim 10, wherein the projecting portion is formed in a semicircular shape in its planar view.

13. A collision detection device for a vehicle having a bumper cover and a bumper reinforcement, the collision detection device comprising:

a chamber member that is disposed on a vehicle-front side of the bumper reinforcement in the bumper cover and includes a chamber main body having therein a hollow portion;

a pressure sensor that detects pressure in the hollow portion of the chamber main body, wherein a clearance is formed between the chamber member and a front surface of the bumper reinforcement at least on a part of a rear surface of the chamber main body;

a collision detection electronic control unit (ECU) that detects a collision of an object with the bumper cover based on a pressure detection result by the pressure sensor; and

a projecting portion which is provided to project from the rear surface of the chamber main body and whose end is in contact with the front surface of the bumper reinforcement,

wherein the projecting portion is formed in a tapered shape whose diameter is reduced toward its end.

14. The collision detection device according to claim 13, wherein the projecting portion is formed in a trapezoidal shape in its planar view.

15. The collision detection device according to claim 13, wherein the projecting portion is formed in a semicircular shape in its planar view.

16. A collision detection device for a vehicle having a bumper cover and a bumper reinforcement, the collision detection device comprising:

a chamber member that is disposed on a vehicle-front side of the bumper reinforcement in the bumper cover and includes a chamber main body having therein a hollow portion;

a pressure sensor that detects pressure in the hollow portion of the chamber main body, wherein a clearance is formed between the chamber member and a front surface of the bumper reinforcement at least on a part of a rear surface of the chamber main body;

a collision detection electronic control unit (ECU) that detects a collision of an object with the bumper cover based on a pressure detection result by the pressure sensor; and

a projecting portion which is provided to project from the rear surface of the chamber main body and whose end is in contact with the front surface of the bumper reinforcement, wherein;

the clearance is formed between the chamber member and the front surface of the bumper reinforcement on the rear surface of each of right and left end regions of the chamber main body in a width direction of the vehicle; and

the projecting portion is provided on the rear surface of each of the right and left end regions of the chamber main body.