Valve control system for internal combustion engines

Details Valve control system for internal combustion engines Valve control system for internal combustion engines

1990-04-19

1991-08-27

Wolfe, Willis R.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9016, 180197, B60K 2816

Patent

active

050424360

ABSTRACT:
The valve lift characteristic of inlet and/or exhaust valves of an internal combustion engine is changed when an excessive slip state of at least one driving wheel of the vehicle is detected. Restoration of the changed valve lift characteristic is inhibited when a specific running condition of the vehicle is detected, or when turning of the vehicle is detected. According to other aspects of the invention, a predetermined valve lift characteristic-changing control manner is changed in response to a detected road surface condition, or in response to detected turning of the vehicle. According to another aspect of the invention, a feedback control amount is calculated based upon a difference between a detected driving wheel speed and a detected vehicle speed, and at least one predetermined gain. The output torque of the driving wheels is reduced in response to the calculated feedback control amount. The valve lift characteristic is changed when the calculated feedback control amount indicates an excessive slip state of the driving wheel(s), and the value of the gain is changed when the valve lift characteristic is changed.

REFERENCES:
patent: 4800850 (1989-01-01), Yoshida et al.
patent: 4883027 (1989-11-01), Oikawa et al.
patent: 4921064 (1990-05-01), Wazaki et al.
patent: 4959794 (1990-09-01), Shiraishi et al.
patent: 4969102 (1990-11-01), Tamura et al.
patent: 4971164 (1990-11-01), Fujita et al.

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