Patent EP0338506A2 successfully refreshed from Google Patents.
EP0338506A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
System for monitoring vehicular slip angle
Assignee: Nissan Motor Co Ltd
•
Filing: 1989-04-18
•
Granted: —
•
Expires: 2009-04-18
Abstract
Abstract A slip angle monitoring system directly compares an absolute value of a lateral acceleration ( | Y˝ | ) with an experimentarily derived given value which serves as a slip criterion causing a slip angle on a vehicle. Slip angle is set at zero while the absolute value of the lateral acceleration is smaller than or equal to the given value. On the other hand, when the absolute value is greater than the given value, the slip angle (ϑ₁ or ϑ₂) is derived by dividing the lateral acceleration by the longitudinal acceleration or by taking minus one power of tangent of quotient dividing the lateral acceleration by the longitudinal acceleration.
Inventors
- 👤 Naoto Fukushima
- 👤 Yukio Fukunaga
- 👤 Yohsuke Akatsu
- 👤 Itaru Fujimura
- 👤 Masaharu Satoh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 16:24
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/1755; B60T8/17551; B60G; B60G17/00; B60G17/015; B60G17/0195; B60G2400/00; B60G2400/10; B60G2400/104; B60G2400/106; B60G2400/20; B60G2400/208; B60G2800/00; B60G2800/21; B60G2800/90; B60G2800/92; B60T2230/00; B60T2230/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
157 words
A system for monitoring slip angle of a vehicle comprising: a longitudinal acceleration monitoring means (2) for monitoring a longitudinal acceleration exerted on the vehicle (1) and producing a longitudinal acceleration indicative signal (X˝); a lateral acceleration monitoring means (3) for monitoring a lateral acceleration exerted on the vehicle and producing a lateral acceleration indicative signal (Y˝); a wheel speed sensor (5) for monitoring a rotation speed of a vehicular wheel to produce a wheel speed indicative signal (V′ x ); and an arithmetic circuit (4) for receiving said longitudinal acceleration indicative signal (X˝), said lateral acceleration indicative signal (Y˝) and said wheel speed indicative signal (V′ x ), said arithmetic circuit (4) deriving a basic slip angle (ϑ₁) on the basis of values of said longitudinal acceleration indicative signal and said lateral acceleration indicative signal, and correcting said basic slip angle (ϑ₁) with a correction factor derived on the basis of said wheel speed indicative signal.
Claim 2
Independent Claim
157 words
A system for monitoring slip angle of a vehicle comprising: a longitudinal acceleration monitoring means (2) for monitoring a longitudinal acceleration exerted on the vehicle (1) and producing a longitudinal acceleration indicative signal (X˝); a lateral acceleration monitoring means (3) for monitoring a lateral acceleration exerted on the vehicle and producing a lateral acceleration indicative signal (Y˝); a wheel speed sensor (5) for monitoring a rotation speed of a vehicular wheel to produce a wheel speed indicative signal (V′ x ); and an arithmetic circuit (4) for receiving said longitudinal acceleration indicative signal (X˝), said lateral acceleration indicative signal (Y˝) and said wheel speed indicative signal (V′ x ), said arithmetic circuit (4) deriving a basic slip angle (ϑ₁) on the basis of values of said longitudinal acceleration indicative signal and said lateral acceleration indicative signal, and correcting said basic slip angle (ϑ₁) with a correction factor derived on the basis of said wheel speed indicative signal.
Claim 3
Dependent Claim
31 words
A slip angle monitoring system as set forth in claim 1, wherein said arithmetic circuit (4) derives said correction factor made by differentiating said wheel speed indicative signal (V′ x ).
Claim 4
Dependent Claim
33 words
A slip angle monitoring system as set forth in claim 1, wherein said correction factor is a wheel acceleration data (Y x ˝) to be added to said longitudinal acceleration indicative data (X˝).
Claim 5
Dependent Claim
39 words
A slip angle monitoring system as set forth in claim 1, wherein said arithmetic circuit (4) derives said basic slip angle (ϑ₁) is derived by dividing said longitudinal acceleration indicative signal (X˝) by said lateral acceleration indicative data (Y˝).
Claim 6
Dependent Claim
70 words
A slip angle monitoring system as set forth in claim 1, wherein said arithmetic circuit (4) compares said lateral acceleration indicative signal value (Y˝) with a predetermined lateral acceleration criterion to derive said slip angle data zero (ϑ₀) when said lateral acceleration indicative signal value, and outputs said slip angle (ϑ₁) at the arithmetically derived value when said lateral acceleration indicative signal value is greater than said lateral acceleration criterion.
Claim 7
Independent Claim
131 words
A system for monitoring slip angle of a vehicle comprising: a longitudinal acceleration monitoring means (2) for monitoring a longitudinal acceleration exerted on the vehicle and producing a longitudinal acceleration indicative signal (X˝); a lateral acceleration monitoring means (3) for monitoring a lateral acceleration exerted on the vehicle and producing a lateral acceleration indicative signal (Y˝); an arithmetic circuit (4) for receiving said longitudinal acceleration indicative signal, said arithmetic circuit comparing said lateral acceleration indicative signal value with a predetermined lateral acceleration criterion to derive said slip angle data zero (ϑ₀) when said lateral acceleration indicative signal value (Y˝) is greater than said lateral acceleration criterion and calculates said slip angle (ϑ₁) on the basis of values of said longitudinal acceleration indicative signal (X˝) and said lateral acceleration indicative signal value.
Claim 8
Independent Claim
131 words
A system for monitoring slip angle of a vehicle comprising: a longitudinal acceleration monitoring means (2) for monitoring a longitudinal acceleration exerted on the vehicle and producing a longitudinal acceleration indicative signal (X˝); a lateral acceleration monitoring means (3) for monitoring a lateral acceleration exerted on the vehicle and producing a lateral acceleration indicative signal (Y˝); an arithmetic circuit (4) for receiving said longitudinal acceleration indicative signal, said arithmetic circuit comparing said lateral acceleration indicative signal value with a predetermined lateral acceleration criterion to derive said slip angle data zero (ϑ₀) when said lateral acceleration indicative signal value (Y˝) is greater than said lateral acceleration criterion and calculates said slip angle (ϑ₁) on the basis of values of said longitudinal acceleration indicative signal (X˝) and said lateral acceleration indicative signal value.
Claim 9
Dependent Claim
34 words
A slip angle monitoring system as set forth in claim 6, wherein said arithmetic circuit derives said slip angle is derives by dividing said longitudinal acceleration indicative signal by said lateral acceleration indicative data.
Claim 10
Independent Claim
178 words
A system for monitoring slip angle of a vehicle comprising: a longitudinal acceleration monitoring means (2) for monitoring a longitudinal acceleration exerted on the vehicle and producing a longitudinal acceleration indicative signal (X˝); a lateral acceleration monitoring means (3) for monitoring a lateral acceleration exerted on the vehicle and producing a lateral acceleration indicative signal (Y˝); a wheel acceleration monitoring means (5) for monitoring wheel acceleration and producing a wheel acceleration indicative data (Y x ˝); an arithmetic circuit (4) for receiving said longitudinal acceleration indicative signal, said arithmetic circuit comparing said lateral acceleration indicative signal value with a predetermined lateral acceleration criterion to derive said slip angle data zero (ϑ₀) when said lateral acceleration indicative signal value, and calculates a basic slip angle (ϑ₁) on the basis of values of said longitudinal acceleration indicative signal (X˝) and said lateral acceleration indicative signal value (Y˝) when said lateral acceleration indicative signal is greater than said lateral acceleration criterion, and correcting said basic slip angle with a correction value derived on the basis of said wheel acceleration indicative data.
Claim 11
Independent Claim
178 words
A system for monitoring slip angle of a vehicle comprising: a longitudinal acceleration monitoring means (2) for monitoring a longitudinal acceleration exerted on the vehicle and producing a longitudinal acceleration indicative signal (X˝); a lateral acceleration monitoring means (3) for monitoring a lateral acceleration exerted on the vehicle and producing a lateral acceleration indicative signal (Y˝); a wheel acceleration monitoring means (5) for monitoring wheel acceleration and producing a wheel acceleration indicative data (Y x ˝); an arithmetic circuit (4) for receiving said longitudinal acceleration indicative signal, said arithmetic circuit comparing said lateral acceleration indicative signal value with a predetermined lateral acceleration criterion to derive said slip angle data zero (ϑ₀) when said lateral acceleration indicative signal value, and calculates a basic slip angle (ϑ₁) on the basis of values of said longitudinal acceleration indicative signal (X˝) and said lateral acceleration indicative signal value (Y˝) when said lateral acceleration indicative signal is greater than said lateral acceleration criterion, and correcting said basic slip angle with a correction value derived on the basis of said wheel acceleration indicative data.
Claim 12
Dependent Claim
29 words
A slip angle monitoring system as set forth in claim 8, wherein said arithmetic circuit derives said correction factor by differentiating said wheel speed indicative signal (V x ′).
Claim 13
Dependent Claim
33 words
A slip angle monitoring system as set forth in claim 9, wherein said correction factor is a wheel acceleration data (V x ˝) to be added to said longitudinal acceleration indicative data (X˝).
Claim 14
Dependent Claim
34 words
A slip angle monitoring system as set forth in claim 10, wherein said arithmetic circuit (4) derives said basic slip angle by dividing said longitudinal acceleration indicative signal by said lateral acceleration indicative data.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.