Device for reducing longitudinal dynamic instabilities of vehicles

• US 4,569,320 A
• Filed: 02/15/1985
• Issued: 02/11/1986
• Est. Priority Date: 03/03/1984
• Status: Expired due to Fees

• Current Assignee: VDO Adolf Schindling AG (Vodafone Group PLC)
• Original Assignee: VDO Adolf Schindling AG (Vodafone Group PLC)
• Inventors: Collonia, Harald
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/701,905
• Time in Patent Office: 361 Days
• Field of Search: 123/399, 123/352, 180/178, 180/179
• US Class Current: 123/399
• CPC Class Codes: F02D 2200/1012 Engine speed gradient
• CPC Class Codes: F02D 2200/1015 Engines misfires
• CPC Class Codes: F02D 2250/28 Control for reducing torsional vibrations, e.g. at acceleration
• CPC Class Codes: F02D 41/1498 measuring engine roughness

Abstract

A device for reducing longitudinal dynamic instabilities of vehicles, in particular back and forth movements of cargo (load) and the uncontrolled periodic feeding of gas having, for the purpose of damping, a differentiation device (8) which differentiates an electric signal of the engine speed of rotation, preferably a voltage. The output signal of the differentiation device feeds a limiter-amplifier (9), the output signal of which, in its turn, intervenes in the deflection of a setting device (4) which acts on the fuel-air mixture of the engine. With this device, a deflection of the setting device takes place which counteracts periodic disturbing changes in speed of rotation while, upon an intended change in position of the setting device by the gas pedal, no perceptible additional effect is exerted on the setting member.

Claims

1. In a system for reducing longitudinal dynamic instabilities of vehicles, in particular back and forth movements of cargo and uncontrolled repetitive application of fuel, the system having means for adjusting the deflection of a setting device for the fuel-air mixture which is to be fed to an internal combustion engine of the vehicle, the improvement wherein said system further comprises:

means responsive to the rotational speed of the engine for providing an electric signal; and

wherein

said deflection adjusting means comprises differentiation means for differentiating said electric signal of the engine rotational speed and a limiter-amplifier which is connected to the output of said differentiation means, said adjusting means providing a deflection of the setting device in response to an output signal of said limiter-amplifier.

2. The system according to claim 1, wherein

the action of the limiter-amplifier into the deflection of the setting device is limited to about 50% of the working region of the deflection of the setting device.

3. The system according to claim 1, further comprising

a gas-pedal position transmitter providing an output electric signal,

said adjusting means further comprises means for combining an output signal of said limiter-amplifier with the output electric signal of said gas-pedal position transmitter.

4. The system according to claim 2, further comprising

a gas-pedal position transmitter providing an output electric signal,

said adjusting means further comprises means for combining an output signal of said limiter-amplifier with the output electric signal of said gas-pedal position transmitter.

5. The system according to claim 1, wherein

said electric signal is a voltage.