Throwback Thursday: 1996 General Motors EV1 first drive


GM EV1 driving shot

The first modern-era electric car was ahead of the curve but compromised, with a range of just 90 miles and economic inviability leading to its downfall

Last month, electric and hybrid models experienced another jump in popularity, taking 5.2% of new car sales in the UK with 8244 registrations.

Most of those will be hybrids, admittedly, but electric vehicles (EVs) are no longer a rarity. This is astonishing, really, given that the first mass-market model, the Nissan Leaf, only went on sale in 2011.

Only 15 years before that came the first EV of the modern era, the aptly named General Motors EV1 – a car that was, in many respects, ahead of its time.

The EV1 began life in 1990 as the Impact two-seat coupé concept car. The reaction to the Impact was so positive that the California Air Resources Board went on to mandate that 2% of sales by major car manufacturers in the state needs to be electric by 1998. Thus development of a production model began.

In April 1994, the 50 examples of the production Impact were issued to volunteers on a two-week loan. This scheme, named Preview, proved enormously popular but all examples of the car were recalled and destroyed at the end of the loans. Call it foreshadowing.

Development behind the scenes continued, resulting in an evolved version of the Impact, the EV1, that rolled out in 1996.

Exclusive to residents of California and Arizona, the EV1 was made available on a leasing programme with monthly fees of around $400 ($615 or £470 today). This was due to the fact that the car would have been unpalatably expensive to buy, with a mooted price of around $35,000 ($53,800 or £41,000 today).

On 28 August 1996, Autocar’s John McCormick travelled to the US to evaluate this pioneer.

«The EV1 is based on a stiff and light aluminium structure,» we explained. «It’s powered by one electric motor, a three-phase, 137bhp (102kW) AC induction motor that spins to 13,000rpm. It is integrated into a drive unit that contains a two-stage gear reduction and differential. The powertrain weights 68kg (150lb) – one-third the weight of a comparable four-cylinder engine and transaxle. Naturally, there are no exhaust emissions and the motor requires no oil changes.

«A suitcase-sized box at the top of the engine bay is the brains of the EV1. Stuffed with Delco-developed electronics, the Propulsion Control Module (PCM) converts 312V of DC power from the 26 lead acid batteries into three-phase AC power. The PCM decides how much voltage to send to the motor (depending on accelerator position), when to turn the motor into a generator (if the driver presses the brakes) and when to switch the current phase (when the driver selects reverse). It also communicates with six other microprocessors that regulate everything from interior temperature to the charge state of the battery pack.»

Then it was time to get behind the wheel. And even this was unconventional, with the EV1 unlocked and started not with a key but by entering a five-digit code via a pad outside the door and then by the gear selector. You then pressed a button, hidden in a myriad of others, marked Run.

«You know you have woken the EV1 up because the digital instrument display in the centre of the dashboard, plus rows of warning lights on either side, light up impressively for a moment, then turn off,» we wrote. «But there is a disconcerting lack of noise. In fact, blipping the accelerator produces no effect at all; silence reigns.

«Time to move that shift lever from Park to Drive and try that pedal again. Gingerly, the EV1 moves off, accompanied by only a muffled whine under the bonnet. Confidence rising, you floor it and the result is a surprise. The EV1 bounds forward at a rate of knots. Fast enough that you quite believe GM’s claimed 0-60mph time of less than 9.0sec.»

Top speed was a regulated 80mph – although a special version had set an EV record of 183.8mph in 1994.

«The EV1’s front disc/rear drum brakes work just fine,» we added, «and you have the curiously satisfying sensation of knowing that the braking action is actually recharging the batteries, because the motor is being temporarily used as a generator.»

As for ride and handling, «you quickly realise that this is no sports car». We continued: «The skinny tyres, pumped up to 50psi, are designed for ultra-low rolling resistance, so understeer is the name of the game. Sharp turns make the 1747kg EV1 heel over clumsily, with the front corners of the composite-skinned body coming perilously close to the Tarmac. The electrically assisted steering has an impressively tight turning circle but loses feel when you put on some lock.

«As compensation for its roly-poly handling, the EV1 delivers a smooth ride. Wind noise is virtually absent, which is not surprising considering the exceptionally aerodynamic (0.19Cd) body. Road racket is also well muted, except when badly rutted roads upset the suspension.»

GM’s years of testing the EV1 had revealed it to have a realistic driving range of about 70 miles if you drove it near its top speed or up to 90 miles if you averaged around 45mph.

«There are two ways of checking range in the EV1. One is a ‘state of charge’ read-out, which displays the battery pack’s energy level via a series of bars and is the equivalent of a regular fuel gauge. The other is a ‘range remaining’ read-out, although, confusingly, this display is ultra-sensitive to the way you’ve been driving over the previous five miles,» we pointed out.

The primary – and quickest – method of refuelling the EV1 was with a Magne-Charge 220V inductive charger, installed in public areas and at drivers’ homes. Charging took two to three hours. The back-up was a 110V portable charger, with a conventional plug, stored in the boot. A full charge from this took 12-15 hours.

We continued: «Up to this point, you can’t help but be impressed by the overall driving …read more

Source:: Autocar